Table of Contents
Can You Drink Tap Water in San Angelo?
Yes, San Angelo's tap water is generally considered safe to drink as San Angelo has no active health based violations of the Safe Drinking Water Act (SDWA) that we are aware of. Other factors such as lead piping in a home, or low levels of pollutants on immunocompromised individuals, should also be considered, however. To find more recent info we might have, you can check out our boil water notice page or the city's water provider website.
According the EPA’s ECHO database, from April 30, 2019 to June 30, 2022, San Angelo's water utility, City of San Angelo, had 0 violations of the Safe Drinking Water Act. For more details on the violations, please see our violation history section below. The last violation for San Angelo was resolved on Sept. 30, 2012. This assessment is based on the City of San Angelo water system, other water systems in the city may have different results.
While tap water that meets the EPA health guidelines generally won’t make you sick to your stomach, it can still contain regulated and unregulated contaminants present in trace amounts that could potentially cause health issues over the long-run. These trace contaminants may also impact immunocompromised and vulnerable individuals.
The EPA is reviewing if it’s current regulations around pollutant levels in tap water are strict enough, and the health dangers posed by unregulated pollutants, like PFAS.
Water Quality Report for San Angelo Tap Water
The most recent publicly available numbers for measured contaminant levels in San Angelo tap water are in its 2020 Water Quality Report. As you can see, there are levels which the EPA considers to be acceptable, but being below the maximum allowable level doesn’t necessarily mean the water is healthy.
Lead in tap water, for example, is currently allowed at up to 15ppb by the EPA, but it has set the ideal goal for lead at zero. This highlights how meeting EPA standards doesn’t necessarily mean local tap water is healthy.
EPA regulations continue to change as it evaluates the long term impacts of chemicals and updates drinking water acceptable levels. The rules around arsenic, as well as, lead and copper are currently being re-evaluated.
There are also a number of "emerging" contaminants that are not currently. For example, PFAS (Per- and polyfluoroalkyl substances), for which the EPA has issued a health advisory. PFAS are called "forever chemicals" since they tend not to break down in the environment or the human body and can accumulate over time.
We recommend looking at the contaminants present in San Angelo's water quality reports, or getting your home's tap water tested to see if you should be filtering your water.
San Angelo Tap Water Safe Drinking Water Act Violation History - Prior 10 Years
Below is a ten year history of violations for the water system named City of San Angelo for San Angelo in Texas. For more details please see the "What do these Violations Mean?" section below.
From July 1, 2012 to Sept. 30, 2012, San Angelo had 1 health-based Safe Drinking Water Act violation with the violation category being Maximum Contaminant Level Violation, more specifically, the violation code was Maximum Contaminant Level Violation, Average which falls into the Disinfectants and Disinfection Byproducts Rule rule code group, and the Stage 1 Disinfectants and Disinfection Byproducts Rule rule code family for the following contaminant code: TTHM.
Is there Lead in San Angelo Water?
Based on the EPA’s ECHO Database, 90% of the samples taken from the San Angelo water system, City of San Angelo, between sample start date and sample end date, were at or below, 0.00365 mg/L of lead in San Angelo water. This is 24.3% of the 0.015 mg/L action level. This means 10% of the samples taken from San Angelo contained more lead.
While San Angelo water testing may have found 0.00365 mg/L of lead in its water, that does not mean your water source has the same amount. The amount of lead in water in a city can vary greatly from neighborhood to neighborhood, or even building to building. Many buildings, particularly older ones, have lead pipes or service lines which can be a source of contamination. To find out if your home has lead, we recommend getting you water tested.
No amount of lead in water is healthy, only less dangerous. As lead accumulates in our bodies over time, even exposure to relatively small amounts can have negative health effects. For more information, please check out our Lead FAQ page.
Are there PFAS in San Angelo Tap Water?
Currently, testing tap water for PFAS isn’t mandated on a national level. We do have a list of military bases where there have been suspected or confirmed leaks. There appears to be at least one military base - Goodfellow AFB - near San Angelo with suspected leaks.
With many potential sources of PFAS in tap water across the US, the best information we currently have about which cities have PFAS in their water is this ewg map, which you can check to see if San Angelo has been evaluated for yet.
Our stance is better safe than sorry, and that it makes sense to try to purify the tap water just in case.
San Angelo SDWA Violation History Table - Prior 10 Years
| Compliance Period | Status | Health-Based? | Category Code | Code | Rule Code | Contaminant Code | Rule Group Code | Rule Family Code |
|---|---|---|---|---|---|---|---|---|
| 07/01/2012 - 09/30/2012 | Resolved | Yes | Maximum Contaminant Level Violation (MCL) | Maximum Contaminant Level Violation, Average (02) | Stage 1 Disinfectants and Disinfection Byproducts Rule (210) | TTHM (2950) | Disinfectants and Disinfection Byproducts Rule (200) | Stage 1 Disinfectants and Disinfection Byproducts Rule (210) |
What do these Violations Mean?
Safe Drinking Water Act Violations categories split into two groups, health based, and non-health based. Generally, health based violations are more serious, though non-health based violations can also be cause for concern.
Health Based Violations
- Maximum contaminant levels (MCLs) - maximum allowed contaminant level was exceeded.
- Maximum residual disinfectant levels (MRDLs) - maximum allowed disinfectant level was exceeded.
- Other violations (Other) - the exact required process to reduce the amounts of contaminants in drinking water was not followed.
Non-Health Based Violations
- Monitoring and reporting violations (MR, MON) - failure to conduct the required regular monitoring of drinking water quality, and/or to submit monitoring results on time.
- Public notice violations (Other) - failure to immediately alert consumers if there is a serious problem with their drinking water that may pose a risk to public health.
- Other violations (Other) - miscellaneous violations, such as failure to issue annual consumer confidence reports or maintain required records.
SDWA Table Key
| Field | Description |
|---|---|
| Compliance Period | Dates of the compliance period. |
| Status |
Current status of the violation.
|
| Health-Based? | Whether the violation is health based. |
| Category Code |
The category of violation that is reported.
|
| Code | A full description of violation codes can be accessed in the SDWA_REF_CODE_VALUES (CSV) table. |
| Contaminant Code | A code value that represents a contaminant for which a public water system has incurred a violation of a primary drinking water regulation. |
| Rule Code |
Code for a National Drinking Water rule.
|
| Rule Group Code |
Code that uniquely identifies a rule group.
|
| Rule Family Code |
Code for rule family.
|
For more clarification please visit the EPA's data dictionary.
San Angelo Water - Frequently Asked Questions
| By Mail: | 72 W COLLEGE AVE SAN ANGELO, TX, 76903-5814 |
Existing customers can login to their City of San Angelo account to pay their San Angelo water bill by clicking here.
If you want to pay your City of San Angelo bill online and haven't made an account yet, you can create an account online. Please click here to create your account to pay your San Angelo water bill.
If you don't want to make an account, or can't remember your account, you can make a one-time payment towards your San Angelo water bill without creating an account using a one time payment portal with your account number and credit or debit card. Click here to make a one time payment.
Moving to a new house or apartment in San Angelo means you will often need to put the water in your name with City of San Angelo. In order to put the water in your name, please click the link to the start service form below. Start service requests for water bills typically take two business days.
Leaving your house or apartment in San Angelo means you will likely need to take your name off of the water bill with City of San Angelo. In order to take your name off the water bill, please click the link to the stop service form below. Stop service for water bills requests typically take two business days.
The estimated price of bottled water
$2.00 in USD (1.5-liter)
USER SUBMITTED RATINGS
- Drinking Water Pollution and Inaccessibility
- Water Pollution
- Drinking Water Quality and Accessibility
- Water Quality
The above data is comprised of subjective, user submitted opinions about the water quality and pollution in San Angelo, measured on a scale from 0% (lowest) to 100% (highest).
Related FAQS
San Angelo Water Quality Report (Consumer Confidence Report)
The EPA mandates that towns and cities consistently monitor and test their tap water. They must report their findings in an annual Consumer Confidence Report. Below is the most recent water quality report from San Angelo's Water. If you would like to see the original version of the report, please click here.
City of San Angelo
Department of Water Utilities
2021 Consumer Confidence Report
(Year 2020 Data)
WHY HAVE I RECEIVED THIS REPORT?
In 1996, Congress amended the Safe Drinking Water Act to include a requirement that water utilities annually notify customers about their drinking water quality. This report is produced annually by the Department of Water Utilities to provide information about the San Angelo water system, source water, levels of minerals and any detected contaminants, and to ensure compliance with applicable TCEQ rules and regulations. We hope this report will also help answer any questions you may have about our water system and quality. The Department of Water Utilities is part of your city government. If you have questions about this report, you may contact us by telephone or mail:
Department of Water Utilities
301 W. Beauregard
San Angelo, Texas 76903
325.657.4209 - http://www.cosatx.us
If you would like the opportunity to participate in decisions that may affect the quality of our water, you may attend a regularly scheduled City Council Meeting at the McNeese Convention Center on the first and third Tuesday of the month.
San Angelo Water System Facts
|
2018 |
2019 |
2020 |
Total Year Pumped (Billion Gallons) |
4.39 |
4.48 |
4.74 |
Daily Treatment Capacity (Million Gallons) |
42 |
42 |
42 |
Maximum Daily Usage (Million Gallons) |
19 |
25 |
20 |
Average Daily Usage (Million Gallons) |
12 |
12 |
13 |
Average Person Usage (Gallons Daily) |
119 |
119 |
129 |
Distribution System (Miles) |
667 |
675 |
686 |
Service Connections (Water Meters) |
34,907 |
35,321 |
35,714 |
Population |
100,119 |
100,215 |
101,004 |
Este reporte incluye información importante sobre el agua para tomar. Para asistencia en Español, favor de llamar al telefono (325)
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WHERE DOES OUR WATER COME FROM?
The City of San Angelo purchases water from Colorado River Municipal Water District and currently has six surface water sources: Twin Buttes Reservoir (Tom Green County), O.C. Fisher Lake (Tom Green County), Lake Nasworthy (Tom Green County), O.H. Ivie Reservoir (Concho, Coleman, Runnels Counties), E.V. Spence Reservoir (Coke County), and the South Concho River (Tom Green County). San Angelo currently gets its source water from O.H. Ivie Reservoir or the South Concho River, which is fed by Twin Buttes and Lake Nasworthy. O.H. Ivie Reservoir is typically the primary source. However, on occasion the South Concho River is used as the primary source. Occasionally, the two source waters are blended.
In 2014, the Hickory Aquifer groundwater (McCullough County) became available as an additional water source. A water treatment plant, which includes ion exchange and pressure filtration to remove radium and iron from the Hickory groundwater, has been completed and is currently being used as an additional water source. The treated groundwater is blended with surface water. Hickory water wells have an average 18 pCi/L of radium. The groundwater treatment plant will remove approximately
The Hickory Aquifer water also has a much lower mineral and organic content than the city’s surface water sources. Utilizing this water will result in a lower overall total mineral content of the finished water. The lower levels of organic material in the water will also help reduce the formation of trihalomethanes (THMs) during the disinfection process.
HOW IS OUR WATER USED?
Residential73%
Commercial11%
Institutional12%
Industrial4%
SPECIAL HEALTH INFORMATION
The following information is not meant to alarm or scare you. It is meant to make you aware. The exact wording shown below is required by state regulations.
"You may be more vulnerable than the general population to certain microbial contaminants, such as Cryptosporidium, in drinking water. Infants, some elderly, or immunocompromised persons such as those undergoing chemotherapy for cancer; those who have undergone organ transplants; those who are undergoing treatment with steroids; and people with HIV/AIDS or other immune system disorders can be particularly at risk from infections. You
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should seek advice about drinking water from your physician or health care provider. Additional guidelines on appropriate means to lessen the risk of infection by Cryptosporidium are available from the Safe Drinking Water Hotline at (800)
TTHMs (Total Trihalomethanes). Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous systems, and may have an increased risk of getting cancer.
2020 - 2021 CAPITAL PROJECTS
- Rehabilitation of water and sewer mains along College Hills Blvd. as part of a 10 year Street Program, $3M.
- Rehabilitation of water and sewer mains along Chadbourne Street as part of a 10 year Street Program, $7M
- Rehabilitation of Bentwood sewer lift station, $1.5M
- Drilling of approximately 5 additional wells in the Hickory Aquifer and upgrading the water treatment facility clearwell, $56M
- Design of Lake Nasworthy sewer trunk main approximately 3.5 miles (total project estimate $32M).
DON'T POUR IT DOWN THE DRAIN - FATS, OILS, GREASE, SOLIDS
These materials are generated during food preparation. They don't mix well with water. When flushed, these materials can build up and block the entire sewer pipeline and cause raw sewage overflows into your home, lawn, streets, parks and rivers. Never pour fats, oil, grease or food scraps into your sink, garbage disposal or toilet. It is best to place as much of these type wastes as you can into your garbage.
FLUSHING FIRE HYDRANTS
The Texas Commission on Environmental Quality (TCEQ) requires mandatory flushing of
WATER CONSERVATION TIPS
- Toilet leaks can be silent! Be sure to test your toilet for leaks at least once a year.
- Put food coloring in your toilet tank. If it seeps into the bowl without flushing, there is a leak. Fix it and start saving gallons.
- If your toilet flapper doesn’t close properly after flushing, replace it.
Page 3 of 12
- One drip every second can add up to five gallons per day! Check your faucets and showerheads for leaks. It’s simple, inexpensive, and you can save 140 gallons per week.
- We’re more likely to notice leaky faucets indoors, but don’t forget to check outdoor faucets, pipes and hoses.
- Sprinklers should spray large drops close to the ground, rather than a fog or mist, which can be blown away by wind.
- When watering your lawn, do not allow your water to run off property to a gutter, street, alley, or drainage for a distance of more than 150 feet.
RAINWATER HARVESTING AND XERISCAPE
The City of San Angelo, as well as the State of Texas, encourage the use of rainwater to help supplement water needs, especially during current drought conditions. We encourage you to look for potential areas on your roof or property where you could capture rainwater. Rainwater can be collected off most any type roof. Metal roofs provide for the cleanest rainwater and are best if you intend to use the water as a potable source. Unscented regular bleach is often used to disinfect water prior to drinking. You should always have your water thoroughly tested if you intend to use it for drinking water to ensure it is safe. Wood and composite shingle roofs provide a less pure water than metal roofs, so water from these roof types is typically used for watering trees, gardens, yards, and foundations. Many homes have existing gutters and downspouts that currently discharge to the ground. These are excellent examples of where a
House Size – 30’ x 60’ = 1800 sq. ft.
1800 x 0.6 = 1080 gallons of water per inch of rain
Normal rainfall in San Angelo is 20” per year, so 1080 x 20 = 21,600 gallons per year
We encourage the public to consider rainwater harvesting projects as part of a long term solution to the water shortage we are currently experiencing in our area.
Another method of reducing water use is the practice of xeriscaping. Xeriscaping is when grass lawns and shrubs are partially or totally replaced with rock, groundcover, desert plant, or low water use shrubs. Xeriscaping a lawn is probably the best way to conserve large amounts of water.
Page 4 of 12
CURRENT DROUGHT LEVEL AS OF THIS PRINTING – STANDARD CONSERVATION
- Watering your lawn is allowed no more than twice every seven days with total applications not exceeding one inch per week.
- Watering is prohibited from noon to 6 p.m., when evaporation rates are highest.
- Golf course greens may be watered daily except during prohibited watering hours.
- Drip irrigation and hand watering are allowed on any day, so long as the total amount of water used does not exceed 1 inch per week. Drip irrigation may occur at any time of day. Hand watering is prohibited from noon to 6 p.m.
- Water may not run more than 150 feet down any gutter, street, alley or ditch.
WATER LOSS IN THE SYSTEM
The TCEQ requires that San Angelo report water loss each year. In the water loss audit submitted to the Texas Water Development Board for the previous calendar year, our system lost an estimated 13.11% treated water. Water loss can result from broken water mains and leaks in the distribution system, routine and
A WORD ABOUT LEAD AND COPPER
If present, elevated levels of lead can cause serious health problems, especially for young children and pregnant women. Lead in drinking water comes primarily from materials used in home plumbing, fixtures and service lines. This water supply is responsible for providing water with acceptable low levels of lead, however cannot control the variety of materials used in plumbing components. When your water has been sitting for several days, you can minimize the potential for elevated levels of lead by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. All public schools should thoroughly flush their water lines following an extended break. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead.
COVID19 CONCERNS WITH YOUR WATER
Disinfection procedures used in the production of our drinking water are very effective at destroying viruses. The water production plant continuously monitors disinfectant residuals at the treatment plant and
throughout the water distribution system. You can feel safe that you won’t contract COVID19 from your tap
water. However, if your business or organization closes down for more than a few weeks and does not use any water during that time, there is an increase in water age and depletion of disinfectant in your inside plumbing. Therefore, we highly recommend that you flush your faucets for five minutes when you begin
Page 5 of 12
operations again to ensure fresh water has been brought from the water mains into and throughout your building. Water that has set stagnant in your building for an extended period of time can potentially leach metals out of your plumbing and fixtures. In addition, there is an increased potential for growth of microorganisms, such as Legionella, in stagnant water. Thorough flushing will bring in fresh water with higher levels of disinfectant.
CHLORAMINE DISINFECTION
San Angelo uses a mixture of chlorine gas and liquid ammonium sulfate for disinfection. When combined, chloramine is formed. Chloramine is primarily composed of monochloramine, with much lesser levels of dichloramine and trichloramine. Surface water sources, such as O.H. Ivie and the South Concho River, typically contain dissolved organic compounds that react with free chlorine during disinfection to form unwanted by- products called trihalomethanes (THMs). To reduce the production of THMs, liquid ammonium sulfate is added at the time of chlorination so it will combine with the chlorine to form chloramines. This is done specifically to reduce and control the production of THMs. As chloramine moves through the distribution system and provides disinfection of the water, it partially decays and releases ammonia. Over time, the ammonia can cause unwanted side effects such as nitrification and biofilm. Periodically the disinfectant must be changed back from chloramines to free chlorine to help control nitrification and reduce the biofilm. This typically takes about four weeks to accomplish and is usually done during the month of June each year. During this change, chlorine dosage levels at the treatment plant are not increased and are often reduced. Free chlorine has a much lower threshold of odor than chloramines so the water may smell like it has more chlorine in it when it actually doesn't.
|
State and Federal |
Levels Measured in |
|
|||
|
Standards |
San Angelo Water |
|
|||
|
|
|
Average |
Minimum |
Maximum |
|
Disinfectant Residual |
|
|
Level |
Level |
Level |
|
|
MCLG |
MCL |
Detected |
Detected |
Detected |
Possible Source |
|
|
|
|
|
|
|
|
4 |
4 |
|
|
|
Disinfectant used to control |
Chloramines (ppm) |
MRDLG |
MRDL |
3.39 |
0.52 |
5.3 |
microbes |
|
||||||
|
|
|
|
|
|
|
MCLG (Maximum Contaminant Level Goal) - The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MCL (Maximum Contaminant Level) - The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to maximum contaminant level goals as feasible using the best available treatment technology.
MRDLG (Maximum Residual Disinfectant Level Goal)- The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
MRDL (Maximum Residual Disinfectant Level) - The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
MRDL and MRDLG are based on a monthly average. There is no violation to occasionally exceed 4.0 mg/L chlorine residual on a given day.
Page 6 of 12
FACTS ABOUT TRIHALOMETHANES (THMs)
When chlorine is added to source water containing dissolved organics, undesirable
2020 THM Quarterly Testing – Results in ppb – TCEQ Limit is 80 ppb Running Annual Average (RAA)
|
First Quarter |
Second Quarter |
Third Quarter |
Fourth Quarter |
||||
Sample |
2/18/2020 |
5/26/2020 |
8/6/2020 |
11/10/2020 |
||||
Site |
Result |
RAA |
Result |
RAA |
Result |
RAA |
Result |
RAA |
38.8 |
48.2 |
46.2 |
50.6 |
85.1 |
57.8 |
34.2 |
51.1 |
|
45.9 |
50.6 |
68.1 |
56.6 |
95.5 |
67.7 |
39.8 |
62.3 |
|
40.7 |
49.2 |
39.2 |
38.2 |
82.5 |
58.7 |
28.7 |
47.8 |
|
41.0 |
52.3 |
43.8 |
51.6 |
82.1 |
59.3 |
29.9 |
49.2 |
|
40.6 |
59.6 |
55.2 |
62.0 |
95.4 |
67.7 |
33.3 |
56.1 |
|
38.2 |
46.2 |
44.1 |
47.9 |
83.1 |
58.0 |
26.2 |
47.9 |
|
39.7 |
49.5 |
45.8 |
49.5 |
94.1 |
61.0 |
34.3 |
53.5 |
|
39.8 |
49.1 |
51.6 |
51.4 |
103.0 |
64.8 |
35.1 |
57.4 |
|
Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous systems, and may have an increased risk of getting cancer
2020 HAA5 Quarterly Testing – Results in ppb – TCEQ Limit is 60 ppb Running Annual Average (RAA)
|
First Quarter |
Second Quarter |
Third Quarter |
Fourth Quarter |
||||
Sample |
2/18/2020 |
5/26/2020 |
8/6/2020 |
11/10/2020 |
||||
Site |
Result |
RAA |
Result |
RAA |
Result |
RAA |
Result |
RAA |
24.7 |
29.9 |
27.6 |
28.9 |
41.0 |
27.8 |
10.0 |
25.8 |
|
25.0 |
30.7 |
22.4 |
28.0 |
25.0 |
23.6 |
10.0 |
20.6 |
|
22.6 |
29.2 |
20.7 |
25.9 |
32.0 |
24.3 |
9.0 |
21.1 |
|
24.8 |
34.0 |
18.2 |
29.3 |
31.0 |
25.8 |
9.0 |
20.8 |
|
25.2 |
35.5 |
19.0 |
31.1 |
29.0 |
24.6 |
10.0 |
20.8 |
|
18.6 |
24.0 |
13.8 |
22.9 |
35.0 |
21.7 |
9.0 |
19.1 |
|
24.5 |
29.9 |
15.8 |
26.8 |
24.1 |
21.6 |
9.0 |
18.4 |
|
25.5 |
30.1 |
15.0 |
26.5 |
24.8 |
21.8 |
9.0 |
18.6 |
|
Some people who drink Haloacetic acids (HAA’s) in excess of the MCL over many years may have an increased risk of getting cancer.
Page 7 of 12
The TCEQ completed an assessment of your source water and results indicate that some of your sources are susceptible to certain contaminants. The sampling requirements for your water system are based on this susceptibility and previous sample data. Any detections of these contaminants may be found in this Consumer Confident Report. For more information on source water assessments and protection efforts at our system, contact Allison Strube, Director of Water Utilities,
The sources of drinking water (both tap and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in source water include: (1) microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife; (2) inorganic contaminants, such as salts and metals, which can be naturally occurring or result from urban storm water runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming; (3) pesticides and herbicides, which might have a variety of sources such as agriculture, urban storm water runoff, and residential uses; (4) organic chemical contaminants, including synthetic and volatile organic chemicals, which are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff, and septic systems; (5) radioactive contaminants, which can be naturally occurring or the result of oil and gas production and mining activities.
In order to ensure that tap water is safe to drink, the EPA prescribes regulations that limit the amount of certain contaminants in water provided by public water systems. Food and Drug Administration regulations establish limits for contaminants in bottled water that must provide the same protection for public health. Contaminants may be found in drinking water that may cause taste, color, or odor problems. These types of problems are not necessarily causes for health concerns. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the EPA Safe Drinking Water Hotline at
-
426-4791. For more information on source water assessments and protection efforts at our system, contact Allison Strube, Director of Water Utilities, 325.657.4209.
REGULATED CONTAMINANTS DETECTED
Coliform Bacteria
Maximum |
Total Coliform |
Highest No. of |
Fecal Coliform or E. Coli |
Total No. of Positive E. Coli |
Violation |
Likely Source of Contamination |
Contaminant |
Maximum |
Positive |
Maximum Contaminant |
or Fecal Coliform Samples |
|
|
Level Goal |
Contaminant Level |
|
Level |
|
|
|
|
|
|
|
|
|
|
0 |
5% of monthly |
0 |
|
0 |
N |
Naturally present in the |
|
samples are positive. |
|
|
|
|
environment. |
|
|
|
|
|
|
|
Page 8 of 12
Regulated Contaminants
Disinfectants and |
Collection |
Highest |
Range of Levels |
MCLG |
MCL |
Units |
Violation |
Likely Source of Contamination |
Disinfection By- |
Date |
Level |
Detected |
|
|
|
|
|
Products |
|
Detected |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Haloacetic Acids |
2020 |
41 |
No goal for |
60 |
ppb |
N |
||
(HAA5)* |
|
|
|
the total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total |
2020 |
103 |
No goal for |
80 |
ppb |
N |
||
Trihalomethanes |
|
|
|
the total |
|
|
|
Highest Level Detected is as the annual running |
(TTHM) |
|
|
|
|
|
|
|
average. |
|
|
|
|
|
|
|
|
|
|
|
|
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Inorganic |
Collection |
Highest |
Range of Levels |
MCLG |
MCL |
Units |
Violation |
Likely Source of Contamination |
Contaminants |
Date |
Level |
Detected |
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Detected |
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|
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Arsenic |
2020 |
1.4 |
1.4 - 1.4 |
0 |
10 |
ppb |
N |
Erosion of natural deposits; Runoff from orchards; |
|
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Runoff from glass and electronics production. |
|
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|
Barium |
2020 |
0.17 |
2 |
2 |
ppm |
N |
Discharge of drilling wastes; Discharge from |
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metal refineries; Erosion of natural deposits. |
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Cyanide |
2020 |
155 |
200 |
200 |
ppb |
N |
Discharge from plastic and fertilizer factories; |
|
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Discharge from steel/metal factories. |
|
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Fluoride |
2020 |
0.24 |
4 |
4.0 |
ppm |
N |
Erosion of natural deposits; Water additive which |
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promotes strong teeth. |
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Nitrate [measured as Nitrogen]
2020
0.574
0.574 - 0.574
10
10
ppm
N
Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits.
Selenium
2020
0
0 – 0
50
50
ppb
N
Discharge from petroleum and metal refineries; Erosion of natural deposits; Discharge from mines.
Radioactive |
Collection |
Highest |
Range of Levels |
MCLG |
MCL |
Units |
Violation |
Likely Source of Contamination |
Contaminants |
Date |
Level |
Detected |
|
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|
Detected |
|
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|
Beta/photon |
11/9/16 |
7.4 |
0 |
4 |
Mrem |
N |
Decay of natural or |
|
emitters |
|
|
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|
|
/year |
|
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|
Gross alpha excluding radon and uranium
2016
1
0 – 6
0
15
pCi/L
N
Erosion of natural deposits.
Uranium
11/9/16
1.1
0
30
ug/L
N
Erosion of natural deposits.
* EPA considers 50 pCi/L to be the level of concern for beta particles.
Synthetic Organic |
Collection |
Highest |
Range of Levels |
MCLG |
MCL |
Units |
Violation |
Likely Source of Contamination |
contaminants |
Date |
Level |
Detected |
|
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|
including |
|
Detected |
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|
pesticides and |
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herbicides |
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Atrizine |
2020 |
0.1 |
3 |
3 |
ppb |
N |
Runoff from herbicide used on row crops |
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Page 9 of 12
Lead and Copper
Lead and |
Date |
MCLG |
Action |
90th |
# Sites |
Units |
Violation |
Likely Source of Contamination |
Copper |
Sampled |
|
Level |
Percentile |
Over AL |
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Copper |
2018 |
1.3 |
1.3 |
0.105 |
0 |
ppm |
N |
Erosion of natural deposits; Leaching from wood preservatives; |
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Corrosion of household plumbing systems. |
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Lead |
2018 |
0 |
15 |
3.65 |
0 |
ppb |
N |
Corrosion of household plumbing systems; Erosion of natural |
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deposits. |
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Turbidity
|
Limit (Treatment |
Level Detected |
Violation |
Likely Source of Contamination |
|
Technique) |
|
|
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|
|
|
Highest single measurement |
1 NTU |
1.0 NTU |
N |
Soil runoff. |
|
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|
|
|
Lowest monthly % meeting limit |
0.3 NTU |
100% |
N |
Soil runoff. |
|
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|
Turbidity is a measure of the clarity of the water. Low turbidity is required to indicate the removal of larger microorganisms.
Total Organic Carbon
The percentage of Total Organic Carbon (TOC) removal was measured each month and the system met all TOC removal requirements set, unless a TOC violation is noted in the violations section.
UNREGULATED CONSTITUENTS
|
Year |
Average Level |
Minimum Level |
Maximum Level |
|
|
Substance (units) |
Tested |
Detected |
Detected |
Detected |
Limit |
Possible Source |
|
|
|
|
|
|
|
Bicarbonate (ppm) |
2020 |
228 |
228 |
228 |
NA |
Erosion of natural deposits |
|
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|
|
Erosion of natural deposits, natural |
Chloride (ppm) |
2020 |
225 |
225 |
225 |
300 |
occurring element, ancient oceanic |
|
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|
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|
|
deposits |
|
|
|
|
|
|
Measure of corrosivity of the water |
pH (units) |
2018 |
8.1 |
8.1 |
8.1 |
> 7.0 |
|
|
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|
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|
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|
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|
|
Erosion of natural deposits, natural |
Sulfate (ppm) |
2020 |
211 |
211 |
211 |
300 |
occurring |
|
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|
|
Erosion of natural deposits, natural |
T Alkalinity as CaCO3 (ppm) |
2020 |
187 |
187 |
187 |
NA |
occurring |
|
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|
|
|
|
|
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|
|
|
|
|
Erosion of natural deposits, total |
Total Dissolved Solids (ppm) |
2020 |
785 |
785 |
785 |
1000 |
dissolved mineral constituents in water |
|
|
|
|
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|
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|
|
|
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|
|
Erosion of natural deposits, total |
Specific Conductance |
2020 |
1370 |
1370 |
1370 |
|
dissolved mineral constituents in water |
|
|
|
|
|
|
|
Unregulated contaminants are those for which the EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulations are warranted.
Page 10 of 12
Cryptosporidium and E. coli Testing of Raw Surface Water Sources
|
|
O.H. Ivie Reservoir |
|
Concho River at Lone Wolf Dam |
||||
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|
|
MPN |
|
|
|
MPN |
|
|
Giardia |
Crypto |
Total |
|
Giardia |
Crypto |
Total |
|
|
(Oo) |
(Oo) |
Coliform/ |
E. coli |
(Oo) |
(Oo) |
Coliform/ |
E. coli |
Month/Year |
cysts/L |
cysts/L |
100 mL |
/100ml |
cysts/L |
cysts/L |
100 mL |
/100ml |
0 |
0 |
11.0 |
<1.0 |
0.3 |
0 |
307.6 |
17.9 |
|
0 |
0 |
1732.5 |
1.0 |
0 |
0 |
980.4 |
13.5 |
|
0 |
0 |
1299.7 |
<1.0 |
0 |
0.1 |
>2419.6 |
6.3 |
|
0 |
0 |
118.7 |
<1.0 |
0.4 |
0 |
>2419.6 |
9.7 |
|
0 |
0 |
224.7 |
3.1 |
0.09 |
0 |
>2419.6 |
104.6 |
|
0 |
0 |
1986.3 |
2.0 |
0 |
0.5 |
>2419.6 |
3.1 |
|
0 |
0 |
1203.3 |
<1.0 |
0 |
0 |
>2419.6 |
5.2 |
|
0 |
0 |
488.4 |
<1.0 |
0 |
0 |
>2419.6 |
21.3 |
|
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
Although Cryptosporidium, Giardia, and E. coli have been detected in source water, these organisms are destroyed or removed in the treatment process by filtration and disinfection. Results in the table above are for raw, untreated water.
Avg – Regulatory compliance with some MCLs are based on running annual average of monthly samples.
MCLG (Maximum Contaminant Level Goal) - The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MCL (Maximum Contaminant Level) - The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to maximum contaminant level goals as feasible using the best available treatment technology.
MRDLG (Maximum Residual Disinfectant Level Goal) - The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
MRDL (Maximum Residual Disinfectant Level) - The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
TT (Treatment technique)
AL (Action Level) - The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
ALG (Action Level Goal) – The level of a contaminant in drinking water below which there is no known or expected risk to health. ALGs allow for a margin of safety.
ND - no detection NA - not applicable
Page 11 of 12
Note: Unregulated contaminants are those for which the EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulations are warranted.
Data presented in this report is from the 2016 calendar year or from the most recent testing performed in accordance with State regulations. The 90th percentile value means 90% of the samples were at or below this value. EPA considers the 90th percentile value the same as an "average" value for other contaminants. Lead and copper are regulated by a treatment technique that requires systems to control the corrosiveness of their water. If more than 10% of tap water samples exceed the action level, water systems must take additional steps.
EPA considers 50 pCi/L to be the level of concern for beta particles.
VIOLATIONS
PUBLIC NOTICE MANDATORY LANGUAGE CODING
Tier 2 violations/
Mandatory Language for Surface Water Treatment Technique Violation
SURFACE WATER TREATM ENT TECH NIQUE: [NON - ACUTE]
TX2260001
- Document End -
Page 12 of 12
Contaminants
City of San Angelo
EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the Texas Commission on Environmental Quality, as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the U.S. EPA (January 2019 - March 2019), tap water provided by this water utility was in compliance with federal health-based drinking water standards.
Utility details
- Serves: 100450
- Data available: 2012-2017
- Data Source: Surface water
- Total: 25
Contaminants That Exceed Guidelines
- Arsenic
- Bromodichloromethane
- Bromoform
- Chloroform
- Dibromochloromethane
- Dichloroacetic acid
- Nitrate
- Total trihalomethanes (TTHMs)
Other Detected Contaminants
- Aluminum
- Barium
- Bromochloroacetic acid
- Carbon tetrachloride
- Chlorate
- Chromium (hexavalent)
- Cyanide
- Dibromoacetic acid
- Fluoride
- Haloacetic acids (HAA5)
- Manganese
- Molybdenum
- Monobromoacetic acid
- Selenium
- Strontium
- Trichloroacetic acid
- Vanadium
Reminder
Always take extra precautions, the water may be safe to drink when it leaves the sewage treatment plant but it may pick up pollutants during its way to your tap. We advise that you ask locals or hotel staff about the water quality. Also, note that different cities have different water mineral contents.
Sources and Resources
Sources Cited
Additional Resources
If you live in San Angelo, TX, you are probably familiar with some of the problems associated with tap water. These include chlorination problems, odors, and chemicals. Many people have chosen to buy bottled water for their drinking needs, and it is also an affordable option.
In San Angelo, TX, there are two main treatment plants that use a process called chlorination to purify tap water. There are two main types of this process, multi-stage (or submicron) and point-of-use (or sub-micron). The first type was developed by The United States of America. The second type was developed by France.
The sub-micron treatment plant is very expensive. Most cities require a filter to be installed under your kitchen sink. These filters can cost thousands of dollars. The point-of-use treatment plant is much less expensive.
In San Angelo, TX, both systems have been put in place. The point-of-use system uses chemicals and other contaminants to clean the wa