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.
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