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National Drinking Water Database


Dibromochloromethane in Massachusetts


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 Massachusetts

176 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)
1East Chelmsford Water District
Chelmsford, MA
2,00018 of 187.58 ppb
(0.6 to 25 ppb)
2Westford Water Department
MA
15,8536 of 66.46 ppb
(5 to 7.75 ppb)
3Marlborough Dpw Water Div.
Marlborough, MA
38,0008 of 86.26 ppb
(1.4 to 11 ppb)
4Wakefield Water Dept
Wakefield, MA
24,0345 of 56.2 ppb
(5 to 7 ppb)
5Billerica Water Dept
Billerica, MA
38,98123 of 235.88 ppb
(1.6 to 17 ppb)
6Wellesley Water Dept.
Wellesley, MA
24,23523 of 235.51 ppb
(3.33 to 7.5 ppb)
7Braintree Water & Sewer Dept.
MA
33,6005 of 65.25 ppb
(0 to 17.2 ppb)
8Scituate Water Division
Scituate, MA
27,20018 of 184.99 ppb
(0.6 to 12 ppb)
9Peabody Dps Water Dept.
Peabody, MA
48,0008 of 84.63 ppb
(2 to 10 ppb)
10Abington/Rockland Joint Wtr. Works
Abington, MA
32,5605 of 54.55 ppb
(1 to 8.37 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 Massachusetts

There are no violations reported for this contaminant in Massachusetts