2022 Drinking Water Quality Report Annual Water Quality Report for the period of January 1 to December 31, 2022
This report is intended to provide you with important information about your drinking water and the efforts made by the water system purveyors to provide safe drinking water.
Phone Number: 972-230-5725
All Drinking Water May Contain Contaminants
Our Drinking Water Meets or Exceeds All Federal (EPA) Drinking Water Requirements This report is a summary of the quality of the water provided to our customers. The analysis was made using the data from the most recent U.S. Environmental Protection Agency (EPA) required tests, and is presented in the attached pages. We hope this information helps you to become more knowledgeable about what’s in your drinking water.
The sources of drinking water (both tap water 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 materials, and can pick up substances resulting from the presence of animals or from human activity. 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. 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. The Food and Drug Administration regulations establish limits for contaminants in bottled water which must provide the same protection for public health. Contaminants that may be present in source water include microbial contaminants (such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife); 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); pesticides and herbicides (which may come from a variety of sources such as agriculture, urban storm water runoff, and residential uses); organic chemical contaminants, including synthetic and volatile organic chemicals (which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff, and septic systems); and radioactive contaminants (which can be naturally- occurring or be the result of oil and gas production and mining activities). 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. For more information on taste, odor, or color of drinking water, please contact Allan McDonald at 972-230-5725. More information about contaminants and potential health effects can be obtained by calling the EPA’s Safe Drinking Water Hotline at: 1-800-426-4791
Where Does Our Drinking Water Come From?
DeSoto’s drinking water is purchased from the City of Dallas, which obtains its water from the following seven (7) sources: Lake Ray Roberts, Lake Lewisville, Lake Grapevine, Lake Ray Hubbard, Lake Tawakoni, Lake Fork, and the Elm Fork of the Trinity River. Regular daily, weekly & monthly tests are conducted on Dallas’ water to ensure that it is clean and meets all water quality requirements.
Information About Secondary Constituents Many constituents (such as calcium, sodium, or iron) which are often found in drinking water, can cause taste, color, and odor problems. The taste and odor constituents are called secondary constituents and are regulated by the State of Texas, not the EPA. These constituents are not causes for health concern. Therefore secondary's are not required to be reported in this document but may greatly affect the appearance and taste of your water. Information About Source Water Assessments TCEQ completed an assessment of Dallas’ source water and results indicate that some of our sources are susceptible to certain contaminants. The sampling requirements for the City of Dallas water system are based on this susceptibility and previous sample data. Any detections of these contaminants will be found in this Consumer Confidence Report. For more information on source water assessments and protection efforts call the City of Dallas 311 Information Line.
DEFINITIONS AVG: Regulatory compliance with some MCLs are based on running annual average of monthly samples. MCL: (Maximum Contaminant Level) - The highest level of a contaminant in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology. MCLG: (Maximum Contaminant Level Goal) - The level of contaminant in drinking water below which there is no known or expected health risk. MCLG’s allow for a margin of safety. Level 1 Assessment : A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system. Level 2 Assessment : A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions. MRDL: (Maximum Residual Disinfectant Level) - The highest level of disinfectant allowed in drinking water. There is convincing evidence that the addition of a disin- fectant is necessary for control of microbial contaminants. 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 contamination. MFL : Millions fiber per liter (a measure of asbestos) Mrem : Millirems per year (a measure of radiation absorbed by the body)
N/A : Not applicable ND : Not Detected NTU : Nephelometric Turbidity Units pCi/L : Picocuries per liter (a measure of radioactivity)
Ppb : Parts per billion, or micrograms per liter—or one ounce in 7,350,000 gallons of water Ppm : Parts per million, or milligrams per liter—or one ounce in 7,350 gallons of water Ppt : Parts per trillion, or nanograms per liter (ng/L) TT ( Treatment Technique): A required process intended to reduce the level of a contaminant in drinking water. Turbidity : A measure of the clarity of drinking water. The lower the turbidity, the better.
Unregulated Contaminants Unregulated contaminants are those for which 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 regulation is warranted. Any unregulated contaminants detected are reported in the following table.
LEVEL
YEAR OF RANGE
Source of Contaminants
CONTAMINANT
Measure Unit
Averages
Minimum Maximum
MCL
MCLG
Chloroform Bromoform
2022 2022 2022 2022
2.91 1.88 4.29 4.66
2.14 1.33 3.68 4.07
4.13 2.29 5.24 5.53
N/A N/A N/A N/A
70
ppb ppb ppb ppb
Byproduct of drinking water disinfec Ɵ on Byproduct of drinking water disinfec Ɵ on Byproduct of drinking water disinfec Ɵ on Byproduct of drinking water disinfec Ɵ on
0 0
Bromodichloromethane Dibromochloromethane
60
LEAD AND COPPER
If present, elevated levels of lead and copper can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. DeSoto is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. 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.
Lead and Copper
Date Sampled
MCLG
Ac Ɵ on Level (AL)
90th Percen Ɵ le**
* sites over AL
Viola Ɵ on
Unit of Measure
Likely Source of Contamina Ɵ on
Corrosion of household plumbing systems; erosion of natural deposits
Lead
09/15/2021
0
15
0
2
No
ppb
Erosion of natural deposits; leaching from wood preserva Ɵ ves; corrosion of household plumbing system.
Copper
09/15/2021
1.3
1.3
0.1666
0
No
ppm
*as annual average
**90 percen Ɵ le value in the distribu Ɵ on system
Water Quality Data Report 2022 This report contains water data for the City of DeSoto and Dallas Water Utilities. The list includes parameters which are tested for, in accordance with Federal and State Water Quality Regulations. The frequency of testing varies depending on the parameters and are in compliance with established standards. This report lists all of the federally regulat- ed or monitored contaminants which have been found in your drinking water. The U.S. EPA requires water systems to test for up to 97 contaminants. REGULATED LEVEL DALLAS Collec Ɵ on Date Average Minimum Maximum MCL MCLG Unit of Measure Source of Contaminants Inorganic Contami- nants
Erosion of natural deposits; water addi Ɵ ve which promotes strong teeth. Run ‐ o ff from fer Ɵ lizer use; leaching from sep Ɵ c tanks, sewage, erosion of natural deposits. Run ‐ o ff from fer Ɵ lizer use, leaching from sep Ɵ c tanks, sewage, erosion of natural deposits. Discharge of drilling waste; discharge from metal re fi neries; erosion of natural deposits. Discharge from steel/metal factories: discharge from plas Ɵ c and fer Ɵ lizer factories.
Fluoride
2022
0.602
0.520
0.647
4
4
ppm
Nitrate (as N)
2022
0.883
0.400
1.19
10
10
ppm
Nitrite (as N)
2022
0.006
<0.0100
0.017
1
1
ppm
Barium
2022
0.033
0.032
0.033
2
2
ppm
Cyanide
2022
168
139
192
200
200
ppb
Radioac Ɵ ve Contaminants Gross beta par Ɵ cle ac Ɵ vity
2017
5.1
4.2
6.6
50
0
pCi/L****
Decay of natural or man ‐ made deposits.
Disinfectant Total Chlorine Residual
Minimum
Maximum
MRDL
MRDLG
In distribu Ɵ on system—Water addi Ɵ ve used to control mi ‐ crobes.
2022
3.21
2.49
4.63
4*
4*
ppm
Lead and Copper
90th Percen Ɵ le
# of sites exceeding ac Ɵ on level
Unit of Measure
Corrosion of household plumbing systems; erosion of natural deposits Corrosion of household plumbing systems; erosion of natural deposits
Lead
2021
0
0
AL=15
0
ppb
Copper
2021
0.26
0
AL=1.3
1.3
ppm
Organic Contami- nants Atrazine
2022
0.13
0.10
0.20
3
3
ppb
Runo ff from herbicide on row crops.
Simazine
2022
0.08
0.06
0.11
4
4
ppb
Herbicide runo ff
Disinfec Ɵ on By Products Total Haloace Ɵ c Acid*** Total Trihalome ‐ thanes
Highest LRAA
60
N/A
2022
12.6
1.3
15.3
ppb
Byproduct of drinking water disinfec Ɵ on.
2022 2022
18.5
4.7
17.0 27.2
80 10
ppb ppb
Byproduct of drinking water disinfec Ɵ on. Byproduct of drinking water disinfec Ɵ on.
N/A
Bromate
6.9
0
0
Total Organic Carbon Total Organic Carbon
TT (no MCL)*****
2022
% removal/SUVA ≤ 2
ppm
Naturally present in the environment.
3.21
2.49
4.63
Highest Single Measurement
Lowest monthly % of samples mee Ɵ ng limits
Turbidity
Turbidity limits
Unit of Measure
Turbidity
2022
95% of readings ≤ 0.3 (TT)
NTU
Soil runo ff
0.27
99%
Total Coliforms Total Coliforms Bacteria
Highest Monthly % of Posi Ɵ ve Samples
Unit of Measure
2022
0.8%
5% or more of monthly samples
Found/Not Found
Naturally Present in the environment.
DESOTO
Maximum Contaminant Level Goal
Total Coliform Maxi- mum Contaminant Level 5% of monthly samples are posi Ɵ ve
Fecal Coliform or E. Coli Maximum Contaminant Level
Total # of Posi Ɵ ve E. Coli or Fecal Coliform Samples
Highest Monthly % of Posi Ɵ ve Samples
Total Coliforms Total Coliforms Bacteria
Viola Ɵ on
0
Naturally present in the environment
2022
0
0
N
Disinfectant Total Chlorine Residual
Average
Minimum
Maximum
MRDL
MRDLG
Unit of Measure
Source in Drinking Water
2022
2.30
1.63
3.45
4*
4*
ppm
In distribu Ɵ on system. Water addi Ɵ ve used to control microbes
Highest Level Detected
Range of Individual Samples
Inorganic Contami- nants Nitrate (measured as Nitrogen) Nitrite (measured as Nitrogen)
Collec Ɵ on Date
MCLG
MCL
Unit of Measure
Viola Ɵ on
Likely Source of Contamina Ɵ on
Runo ff from fer Ɵ lizer use; leaching from sep Ɵ c tanks, sewage; erosion of natural deposits Runo ff from fer Ɵ lizer use; leaching from sep Ɵ c tanks, sewage; erosion of natural deposits
2022
1
0.565 ‐ 0.565
10
10
ppm
N
2022
0.0202
0 ‐ 0.0202
1
1
ppm
N
Range of Individual Samples
Highest Level Detected
Disinfec Ɵ on By Products Haloace Ɵ c Acid (HAA5)*
Collec Ɵ on Date
MCLG
MCL
Unit of Measure
Viola Ɵ on
Likely Source of Contamina Ɵ on
No goal for the total
2022
6.1
1 ‐ 6.1
60
ppb
N
By ‐ product of drinking water disinfec Ɵ on
Total Trihalome ‐ thanes (TTHM)
No goal for the total
2022
15.4
12.1 ‐ 15.4
80
ppb
N
By ‐ product of drinking water disinfec Ɵ on
*as annual average ***Haloace Ɵ c Acids— fi ve species \****50 pCi/L—4 mrem/yr *****Treatment technique requires 35% removal or SUVA ≤ 2. The percentage of Total Organic Carbon (TOC) removal was measured each month and the system met all TOC removal require ‐ ments.
SPECIAL NOTICE FOR THE ELDERLY, INFANTS, CANCER PATIENTS, PEOPLE WITH HIV/AIDS AND OTHER IMMUNE PROBLEMS
WATER LOSS AUDIT In the Water Loss Audit submitted to the Texas Water Development Board for the time period of January—December 2022, our system lost an estimated 24,774,000 gallons of water. If you have any questions about the water loss audit please call 972-230-5725. 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 steroid treatment, and persons with HIV/AIDS or other immune system disorders can be particularly at risk from infections. You should seek advice about drinking water from your health care providers. Additional guidelines on appropriate means to lessen the risk of infection by Cryptosporidium are available from the Safe Drinking Water Hotline: 1-800-426-4791
VIOLATIONS
Violation Type
Violation Began
Violation End
Comments
Monitoring Violation
12//22
1/23
Our system failed to collect every required coli- form sample.
LET’S BE WATER SMART!!
Less than 1% of the water treated by public water suppliers is used for drinking and cooking. A full bathtub requires about 70 gallons of water while a five-minute shower uses only 10 to 25 gallons. At one drip per second, a faucet can leak as much as 3,000 gallons in a year. One out of every nine people worldwide does not have access to clean water.
Public Participation Opportunities Public participation opportunities are available during the Public Comment portion of the City Council meetings held on the 1st and 3rd Tuesday of each month at 7pm. For more information about public participation, please call 972-274-CITY. Este reporte incluye información importante sobre el agua para tomar. Para asistencia en español, favor de llamar al telefono (972) 230-9627
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