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National Drinking Water Database


Dibromochloromethane in Rhode Island


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 Rhode Island

21 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)
1Naval Station, Newport
Newport, RI
7,8713 of 310.97 ppb
(9.1 to 12.1 ppb)
2Portsmouth Water & Fire District
Portsmouth, RI
16,2701 of 17.95 ppb
(7.95 ppb)
3South Kingstown-Middlebridge
Wakefield, RI
5431 of 13.6 ppb
(3.6 ppb)
4City of Newport
Newport, RI
43,8094 of 222.24 ppb
(0 to 16 ppb)
5North Tiverton Fire District
Tiverton, RI
8,96914 of 161.97 ppb
(0 to 4.5 ppb)
6Woonsocket Water Department
Woonsocket, RI
46,00014 of 271.66 ppb
(0 to 4.85 ppb)
7Stone Bridge Fire District
Tiverton, RI
2,50011 of 181.29 ppb
(0 to 3.4 ppb)
8Westerly Water Department
Westerly, RI
38,0007 of 281.22 ppb
(0 to 9.3 ppb)
9Jamestown Water Department
Jamestown, RI
3,1784 of 140.85 ppb
(0 to 3.8 ppb)
10South Kingstown-South Shore
South Kingstown, RI
3,8113 of 80.84 ppb
(0 to 2.6 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 Rhode Island

There are no violations reported for this contaminant in Rhode Island