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Coliform Bacteria
Total No.of Positive Total Coliform Maximum
MCLG E.Coli or Fecal Contaminant Level Level 1 Assessment MCL Violation Corrective Actions Likely Source of Contamination
Coliform Samples
0 5 1.41%of monthly 0 N 0 Naturally present in the environment.
samples are positive
Lead and Copper
Lead and Copper Date sampled MCLG The 90th Percentile Action Level Site#Over Units Violation Likely Source of Contamination
Action Level
Copper 2024 1.3 0.3444 1.3 0 PPM No Erosion of natural deposits;
Corrosion of household plumbing systems.
Lead 2024 0 3.3 5 1 PPB No Corrosion of plumbing systems;
Erosion of natural deposits.
A service line inventory has been prepared and can be accessed online by visiting:https://lead-service-line-inventory-euless.hub.arcgis.com
Regulated Contaminants
Disinfectants and Range of Levels
Disinfection Collection Date Highest Level Detected Detected MCLG MCL Units Violation Likely Source of Contamination
By-Products
Arsenic 1112/2023 Euless 0.001 0.001-0.001 0 1 PPB No Erosion of natural deposits;Runoff from orchards;Runoff
from glass&electronics production wastes.
Antimony(Total) 11/2/2023 Euless .001 .001-.001 .006 .006 PPB No Naturally occurring element.
Atrazine 1/27/2025 Euless 0.1 0.1-0.1 3 3 PPB No Runoff from herbicide used on row crops.
3/27/2025 TRA 0.20 0.20-0.20
11/2/2023 Euless 0.063 0.038-0.063 Discharge of drilling wastes;Discharge from metal
Barium 2 2 PPM No
2/27/2025 TRA 0.039 0.039-0.039 refineries;Erosion of natural deposits.
Bromate 2025 TRA <5.00 <5.00-<5.00 0 10* PPB No By-product of drinking water disinfection
*Compliance based on Running Annual Average of monthly averages for Bromate at the end of each quarter,which was less than 5 ppb for each quarter in 2023.
11/2/2023 Euless 3.9 3.9-3.9
Chromium 6/14/2021 TRA 2.2 2.2-2.2 100 100 PPB No Discharge from steel and pulp mills.
9/26/2023 Euless 34.6 0-34.6 Discharge from steel/metal factories;Discharge from plastic
Cyanide 200 200 PPB No
2/27/2025 TRA 90 90-90 and fertilizer factories.
Fluoride 11/2/2023 Euless 1.94 1.74-1.94 4 4.0 PPM No Erosion of natural deposits;Water additive which promotes
2/27/2025 TRA 0.318 0.318-0.318 strong teeth;Discharge from fertilizer&aluminum factories.
Nitrate(measured as 7/29/2025 Euless 0.223 0.223-0.223 10 10 PPM No Runoff from fertilizer use;leaching from septic tanks;
Nitrogen) 2/27/2025 TRA 0.260 0.260-0.260 sewage;erosion of natural deposits.
Nitrite(measured as 2023 Euless <0.01 0-0.01 Runoff from fertilizer use;leaching from septic tanks;
Nitrogen) 2013 TRA 0.004 0-0.004 1 1 PPM No sewage;erosion of natural deposits.
Simazine 1/27/2025 Euless 0.006 0.006-0.006 4 4 PPB No Herbicide runoff
2/27/2025 TRA 0.10 0.10-0.10
Total Organic Carbon 2025 TRA 1.23 1.01-1.23 None TT=1.0 None No Naturally present in the environment.
Removal Ratio*
*Removal ratio is the percent TOC removed by the treatment process divided by the percent of TOC removal required by TCEQ.
Turbidity highest single 2025 TRA 0.21 0.03-0.21 0 TT=1.0 NTU No Soil runoff.Good indicator of water quality&filtration.
measurement
of Samples<0.3 NTU 2025 Lowest was 100 100-100 _ 100 _ TT=95 % No Soil runoff.Good indicator of water quality&fltration.
Haloacetic Acids(Haas*) 2025 Euless 18 1-18 N/A 60 PPB No By-product of drinking water disinfection
Total Trihalomethanes 2025 Euless 34 32.8-34 j i 80 PPB No By-product of drinking water disinfection
*Not all sample results may have been used for calculating the Highest Level Detected because some results may be part of an evaluation to determine where compliance sampling should occur in the future.
Unregulated Contaminants
Contaminant Collection Date Highest Single Sample Range of Levels Detected Units Likely Source of Contamination
7/30/2025 Euless 15.1 15.1-15.1
Bromodichloromethane 9/3/2025 TRA 16.4 16.4-16.4 PPB By-product of drinking water chlorination.
7/30/2025 Euless 16.3 16.3-16.3
Chloroform 9/3/2025 TRA 18.6 18.6-18.6 PPB By-product of drinking water chlorination.
7/30/2025 Euless 7.85 7.85-7.85
Dibromochloromethane 9/312025 TRA 7.57 7.57-7.57 PPB By-product of drinking water chlorination.
Lithium 8/14/2024 Euless 58.1 58.1-58.1 ug/L Naturally present in the environment.
PFBA 8/14/2024 Euless .0057 .0057-.0057 ug/L Potential environmental factors
PFPeA 8/14/2024 Euless .0031 .003-.0031 ug/L Potential environmental factors
PFBS 8/14/2024 Euless .004 .004-.0037 ug/L Potential environmental factors
PFHxA 8/14/2024 Euless <MRL <MRL ug/L Potential environmental factors
PFOS 8/14/2024 Euless <MRL <MRL ug/L Potential environmental factors
.
Contaminant Collection Date Highest Single Sample Range of Levels Detected MOLD MCL Units Violation Likely Source of Contamination
Beta/photon emitters 11/2/2023 <4 4-4 0* 50* pCi/L No Decay of natural and man-made deposits.
*MCLG and MCL are given in exposure units of millirem/year(set as 0 and 4 respectively),but samples are measured in activity units of picoCuries/Liter(pCi/L).EPA considers 50 pCi/L to be the level of concern for Beta particles.
Secondary and Other Constituents Not Regulated ■
Contaminant Collection Date Highest Range of Levels Detected Secondary Limit Units Violation Likely Source of Contamination
r8llllT.1•
Acetone 1
9/312025 TRA 5.92 5.92-5.92 PPB No By-product of drinking water chlorination.
11/15/2023 Euless .0057 .0057-.0057
Aluminum 2/27/2025 TRA 26 26-26 200 PPB No Abundant naturally occurring element.
Bicarbonate 3/19/2025 TRA 81 81-81 None PPM No Erosion of carbonate rocks such as limestone.
(as calcium carbonate)
Calcium 3/20/2024 Euless 117 117-117 None PPM No Abundant naturally occurring element.
2/27/2025 TRA 38.0 38-38
Chloride 6/6/2024 Euless 121 121-121 300 PPM No Abundant naturally occurring element.Used in water
2/27/2025 TRA 18.4 18.4-18.4 purification;By-product of oil field activity.
Conductivity @ 25°C 6/6/2024 Euless 1550 1550-1550 None pmho/cm No Ability of water to conduct electricity due to electrolytes.
2/27/2025 TRA 342 342-342
Copper 2/27/2025 TRA 6.2 6.2-6.2 1000* PPB No Erosion of natural deposits;Corrosion of household
6/30/2024 Euless 655 655-655 plumbing.
*This secondary limit is for Copper as a nuisance contaminant,apart from the primary list because it can stain fixtures and impart a bitter metallic taste to drinking water.
Magnesium 9/26/2023 Euless 0.753 0.753-0.753 None PPM No Abundant naturally occurring element.
2/27/2025 TRA 3.68 3.68-3.68
Manganese 6l4/2024 Euless 13 13-13 50 PPB No Naturally occurring element.
2/27/2025 TRA 3.5 3.5-3.5
Nickel I 1112/2023 Euless <1 1-1 None PPB No Naturally occurring element.
2/27/2025 TRA 1.0 1.0-1.0
9/26/2023 Euless 1.37 1.37-1.37
Potassium 2/27/2025 TRA 4.86 4.86-4.86 None PPM No11.11
Naturally occurring element.
2024 Euless 8.2 7.0-8.2
pH 2O25 TRA 8.8 7,4_8.8 >7.0 PH unit No Measure of the corrosivity of water.
Sodium 6/6/2024 Euless 329.3 329.3-329.3 None PPM No Abundant naturally occurring element By-product of oil field
2/27/2025 TRA 27.5 27.5-27.5 activity
Sulfate 6/6/2024 Euless 177 177-177 300 PPM iIIIIMr Naturally occurring constituent;common industrial by-
2/27/2025 TRA 48.9 48.9-48.9 product;by-product of oil field activity.
Total Alkalinity 4/26/2024 Euless 426.4 426.4-426.4 None PPM No Naturally occurring soluble mineral salts.
(as calcium carbonate) 2/27/2025 TRA 81 81-81
Total Dissolved Solids 6/6/2024 Euless 880 880-880 1000 PPM No Total dissolved mineral constituents in water.
2/27/2025 TRA 194 194-194
Total Hardness 3/19/2024 Euless 150 150-150 Naturally occurring soluble Calcium and Magnesium
(as calcium carbonate) 2/27/2025 TRA 110 110-110 None PPM No deposits.
Zinc 2/27/2025 TRA 5.6 5.6-5.6 5000 PPB No Naturally occurring element
Radioactive Contaminant Collection Date Highest Level Detected Range of Levels Detected MOLD MCL Units Violation Likely Source of Contamination
Combined Radium 226/228 1/3/2017 1.5 1.5-1.5 0 5 PCl/L No Erosion of natural deposits.
Chlorine Residual Year Average Level Range of Levels Detected MRDL MRDLG Units Violation Source in drinking water
Chlorine Residual 2025 2.0 0.5-4.0 4 4 PPM No Chlorine is a water additive used to control microbes.
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