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National Drinking Water Database


Dibromochloromethane in New Hampshire


Dibromochloromethane 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 New Hampshire

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

Ranked by highest average Dibromochloromethane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Ashley Commons
Milford, NH
753 of 35.84 ppb
(<0.01 to 10 ppb)
2Peu /Castle Reach
Windham, NH
976 of 75.01 ppb
(0 to 35 ppb)
3Cedar Wood Estates
Lee, NH
302 of 34.47 ppb
(0 to 7.9 ppb)
4Windham Terrace
Windham, NH
1103 of 54.24 ppb
(0 to 13 ppb)
5Wal Mart Store 2057
NH
402 of 33.33 ppb
(0 to 10 ppb)
6Hadleigh Woods
NH
1092 of 43 ppb
(0 to 12 ppb)
7Lincoln Akerman School
NH
3182 of 52.74 ppb
(0 to 8.7 ppb)
8Usaf NH Satellite Tracking Stn
NH
1506 of 62.1 ppb
(<0.01 to 5.1 ppb)
9Exeter River Mhp
Exeter, NH
9802 of 22.1 ppb
(0.6 to 3.6 ppb)
10Market Basket Demoulas 25
NH
3951 of 32.1 ppb
(0 to 6.3 ppb)

Health Based Limits for Dibromochloromethane

StandardDescriptionLevel
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.0.4 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.0.8 ppb
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.60 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.60 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
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.80 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.600 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.600 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.700 ppb

Violation Summary for Dibromochloromethane in New Hampshire

There are no violations reported for this contaminant in New Hampshire