Arlington Water Utilities | 2025 WATER QUALITY REPORT
Table B | Unregulated Contaminants
SUBSTANCE UNITS
ANNUAL RUNNING AVERAGE OF ALL SAMPLES
AVEREAGE LEVEL
MINIMUM LEVEL
MAXIMUM LEVEL
MCL MCLG
POSSIBLE SOURCE OF SUBSTANCE
Chloroform |
ppb |
2.80 |
2.30 |
3.30 |
NE |
NE |
By-product of drinking water |
Bromodichloromethane |
ppb |
3.60 |
3.20 |
3.90 |
NE |
NE |
disinfection; |
Chlorodibromomethane |
ppb |
3.80 |
3.60 |
4.10 |
NE |
60 |
not regulated individually; |
Bromoform |
ppb |
0.90 |
0.70 |
1.10 |
NE |
NE |
included in Total Trihalomethanes |
Dichloroacetic Acid |
ppb |
3.87 |
3.75 |
4.07 |
NE |
NE |
By-product of |
Bromoacetic Acid |
ppb |
0.07 |
ND |
0.12 |
NE |
NE |
drinking water disinfection; |
Dibromoacetic Acid |
ppb |
1.45 |
1.39 |
1.55 |
NE |
NE |
not regulated |
Chloroacetic Acid |
ppb |
1.01 |
0.79 |
1.25 |
NE |
NE |
individually; included in |
Trichloroacetic Acid |
ppb |
0.03 |
ND |
0.06 |
NE |
300 |
Haloacetic Acids. |
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.
Other Substances of Interest
SUBSTANCE UNITS AVERAGE LEVEL MINIMUM LEVEL MAXIMUM LEVEL Calcium ppm 30.0 28.0 32.0 Chloride ppm 18.0 15.0 21.0 Magnesium ppm 3.58 2.91 4.25 pH pH units 8.16 7.82 8.38 Potassium ppm 4.44 4.25 4.63 Sodium ppm 23.7 20.8 26.6 Sulfate ppm 39.0 28.0 47.2 Alkalinity, Total ppm 85.2 73 98.9 Total Dissolved Solids ppm 177 124 200
Hardness, Total( as CaCO3)
ppm 94 80.4 110 grains / gallon 5.5 4.7 6.4
Water Loss Statement
Arlington Water Utilities produced 18,509,625,832 gallons of treated water for use by customers in Arlington in 2025. The department reported a system water loss percentage of 9.46 percent, which refers to the amount of water lost due to leaks, water line breaks or other non-revenue water use.
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Diagram of utility and customer line ownership 4