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National Drinking Water Database

Dibromoacetic acid in Montana

Dibromoacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in Montana

117 water utilities reported detecting Dibromoacetic acid in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Dibromoacetic acid level

RankSystem Population Served Positive test results of total reported tests Average Level
1Rapelje Water Users Assn
Rapelje, MT
702 of 212 ppb
(11 to 13 ppb)
2Pryor Creek Water Assn
Huntley, MT
452 of 25.95 ppb
(5.9 to 6 ppb)
3Midway Colony
751 of 15.6 ppb
(5.6 ppb)
4Granite Park Water Association
251 of 14.8 ppb
(4.8 ppb)
5Oak Ridge Estates
Billings, MT
2002 of 24.25 ppb
(3.9 to 4.6 ppb)
6St Labre Indian School
Ashland, MT
6501 of 14.05 ppb
(4.05 ppb)
7Town of Melstone
Melstone, MT
1708 of 93.91 ppb
(0 to 5.4 ppb)
8City of Wolf Point
Wolf Point, MT
3,9153 of 33.57 ppb
(1.7 to 5.2 ppb)
9Yellowstone Boys and Girls Ranch
Billings, MT
2402 of 23.25 ppb
(1.9 to 4.6 ppb)
10Duck Creek Mobile Home Park
Billings, MT
701 of 13.2 ppb
(3.2 ppb)

Health Based Limits for Dibromoacetic acid

Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.60 ppb

Violation Summary for Dibromoacetic acid in Montana

There are no violations reported for this contaminant in Montana