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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Bromochloromethane


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and a fire extinguishing agent.

 
Detected
Found above
health guidelines
Found above
legal limit
States
21
-
-
Water utilities
121
-
-
People Served
3,372,085
-
-

Health Concerns for Bromochloromethane:


Bromochloromethane Exposure by State

Water utilities in 21 states have reported detecting Bromochloromethane in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Bromochloromethane contamination
SystemsPopulation
California10960,977
Alabama8579,498
New York22514,042
New Jersey7431,532
Massachusetts10327,369
Texas8209,586
Ohio985,870
Wisconsin672,357
Michigan549,842
Alaska343,744
North Carolina1143,555
Maine121,500
Minnesota614,549
Delaware34,670
Illinois14,050
Missouri12,779
Iowa31,973
Arkansas41,832
New Mexico11,200
Vermont11,100
Virginia160
Total1213,372,085

The Most Polluted Communities

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

Ranked by highest average Bromochloromethane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1NJ American Water Company
Shorthills, NJ
217,2301 of 17.6 ppb
(7.6 ppb)
2Pontoon Beach Pwd
Granite City, IL
4,0501 of 16 ppb
(6 ppb)
3Village of Woodsfield
Woodsfield, OH
2,9901 of 26 ppb
(0 to 12 ppb)
4Derby Center Water System
Derby, VT
1,1001 of 26 ppb
(0 to 12 ppb)
5Pleasant Acres Mhp
Newark, OH
3001 of 15.33 ppb
(5.33 ppb)
6City of Wilmington
Wilmington, OH
11,9211 of 14.5 ppb
(4.5 ppb)
7Metropolitan Water Board
Clay, NY
01 of 24.2 ppb
(0 to 8.4 ppb)
8Mountain View Estates
Stormville Rd., NY
1401 of 14.1 ppb
(4.1 ppb)
9Andover Water Dept
Andover, MA
31,3441 of 23.1 ppb
(0 to 6.2 ppb)
10Wilmington Water Dept
Wilmington, MA
21,7791 of 22.65 ppb
(0 to 5.3 ppb)

Health Based Limits for Bromochloromethane

StandardDescriptionLevel
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.50 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.90 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.90 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.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.50000 ppb

Testing Summary for Bromochloromethane

Are tests routinely required for Bromochloromethane by federal law?No
Water suppliers reporting tests for Bromochloromethane (2004-2009):20,577 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.6 per year

Cancer

Type of concern: Reference:
One or more in vitro tests on mammalian cells show positive mutation results RTECS®- Toxicological and Environmental Chemistry 1987
One or more in vitro tests non-mammalian cells show positive mutation results RTECS®- Toxicological and Environmental Chemistry 1987
One or more in vitro tests non-mammalian cells show positive mutation results RTECS®- HEW Publication (FDA 1978

Occupational hazards

Type of concern: Reference:
Allowed workplace exposures restricted to high doses RTECS®- MSHA STANDARD-air: 3,50,1971
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Gen Indu): 29,1910 1994
Allowed workplace exposures restricted to high doses RTECS®- TLV/BEI,2007
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Construc): 29,1926 1994
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Shipyard): 29,1915 1993
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994

Ecotoxicology

Type of concern: Reference:
Not suspected to be an environmental toxin Environment Canada Domestic Substance List

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Classified as not expected to be potentially toxic or harmful Environment Canada Domestic Substance List

Persistence and bioaccumulation

Type of concern: Reference:
Not suspected to be bioaccumulative Environment Canada Domestic Substance List



Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
Environment Canada Domestic Substance ListMETHANE, BROMOCHLORO-•This chemical was NOT flagged by CEPA for further attention. The chemical was flagged for suspected persistence.
RTECS®- TLV/BEI,2007METHANE, BROMOCHLORO-• occupationally related - ACGIH TLV (human TWA)
RTECS®- HEW Publication (FDA 1978METHANE, BROMOCHLORO-• mutagenic - Positive mutation assay: Mutation in Micro-organism (Salmonella typhimurium )
RTECS®- MSHA STANDARD-air: 3,50,1971METHANE, BROMOCHLORO-• occupationally related - MSHA STANDARD-air (human TWA)
RTECS®- OSHA PEL (Construc): 29,1926 1994METHANE, BROMOCHLORO-• occupationally related - OSHA PEL (Construc) (human TWA)
RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994METHANE, BROMOCHLORO-• occupationally related - OSHA PEL (Fed Cont) (human TWA)
RTECS®- OSHA PEL (Gen Indu): 29,1910 1994METHANE, BROMOCHLORO-• occupationally related - OSHA PEL (Gen Indu) (human TWA)
RTECS®- OSHA PEL (Shipyard): 29,1915 1993METHANE, BROMOCHLORO-• occupationally related - OSHA PEL (Shipyard) (human TWA)
RTECS®- Toxicological and Environmental Chemistry 1987METHANE, BROMOCHLORO-• mutagenic - Positive mutation assay: Mutation in Micro-organism (Salmonella typhimurium )
• mutagenic - Positive mutation assay: Cytogenetic Analysis (hamster lng)
• mutagenic - Positive mutation assay: Sister Chromatid Exchange (hamster lng)



references

government/industry list/academic study reference
Environment Canada Domestic Substance ListEC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
RTECS®- TLV/BEI,2007RTECS®- TLV/BEI,2007
RTECS®- HEW Publication (FDA 1978RTECS®- HEW Publication (FDA. United States). (Washington, DC) ?-1979(?). For publisher information, see HPFSDS. FDA-78-1046,1978
RTECS®- MSHA STANDARD-air: 3,50,1971RTECS®- MSHA STANDARD-air: 3,50,1971
RTECS®- OSHA PEL (Construc): 29,1926 1994RTECS®- OSHA PEL (Construc): 29,1926.55,1994
RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994RTECS®- OSHA PEL (Fed Cont): 41,50-204.50,1994
RTECS®- OSHA PEL (Gen Indu): 29,1910 1994RTECS®- OSHA PEL (Gen Indu): 29,1910.1000,1994
RTECS®- OSHA PEL (Shipyard): 29,1915 1993RTECS®- OSHA PEL (Shipyard): 29,1915.1000,1993
RTECS®- Toxicological and Environmental Chemistry 1987RTECS®- Toxicological and Environmental Chemistry. (Gordon & Breach Science Pub. Inc., 1 Park Ave., New York, NY 10016) V.3(3/4)- 13,205,1987

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