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National Drinking Water Database


Bromoform in Alaska


Bromoform is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in Alaska

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

Ranked by highest average Bromoform level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Chefornak Water System
Chefornak, AK
4082 of 263.93 ppb
(5.86 to 122 ppb)
2Shishmaref Water System
Shishmaref, AK
57213 of 1317.4 ppb
(3.84 to 64 ppb)
3Cold Bay
Cold Bay, AK
973 of 314.1 ppb
(7.1 to 25.9 ppb)
4Nsbu - Kaktovik (Barter Is)
Barrow, AK
3036 of 613.08 ppb
(7.26 to 20.8 ppb)
5Creekwood Apartments Limited Partnership
Palmer, AK
1929 of 1112.87 ppb
(0 to 41 ppb)
6Saint Paul Water System
St. Paul, AK
5475 of 612.34 ppb
(0 to 23.7 ppb)
7Shaktoolik Water System
Shaktoolik, AK
2402 of 411.82 ppb
(0 to 46.6 ppb)
8White Mountain Water System
White Mountain, AK
2034 of 47.39 ppb
(6.92 to 7.84 ppb)
9Igiugig Water System
Igiugig, AK
1003 of 66.25 ppb
(0 to 15.5 ppb)
10Uic / Narl
Barrow, AK
2973 of 75.47 ppb
(0 to 25.2 ppb)

Health Based Limits for Bromoform

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.4.3 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.8 ppb
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.80 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.200 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.800 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.1000 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb

Violation Summary for Bromoform in Alaska

There are no violations reported for this contaminant in Alaska