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National Drinking Water Database

National Drinking Water Database - Chemical Contaminants

Tribromoacetic acid

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

Tribromoacetic acid is a haloacetic acid and an unregulated byproduct of tap water disinfection using ozonation.

Found above
health guidelines
Found above
legal limit
Water utilities
People Served

Health Concerns for Tribromoacetic acid:

Tribromoacetic acid Exposure by State

Water utilities in 2 states have reported detecting Tribromoacetic acid in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Tribromoacetic acid contamination
New York21,009,264

The Most Polluted Communities

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

Ranked by highest average Tribromoacetic acid level

RankSystem Population Served Positive test results of total reported tests Average Level
1Metropolitan Water Board
Clay, NY
01 of 18 ppb
(8 ppb)
Barnard, MO
2571 of 97.28 ppb
(0 to 65.5 ppb)
Blairstown, MO
1854 of 121.99 ppb
(0 to 6.37 ppb)
4North Central MO Regional Water Com
252 of 100.99 ppb
(0 to 8.2 ppb)
5Howard Co Cons Pwsd #1
Franklin, MO
1,8352 of 50.95 ppb
(0 to 3.78 ppb)
Tina, MO
1981 of 70.68 ppb
(0 to 4.78 ppb)
7Stoddard Co Pwsd #4
Dexter, MO
1,4101 of 70.61 ppb
(0 to 4.25 ppb)
Blackwater, MO
2901 of 70.55 ppb
(0 to 3.83 ppb)
Chaffee, MO
3,0591 of 50.54 ppb
(0 to 2.72 ppb)
10Sweet Springs
Sweet Springs, MO
1,6941 of 130.42 ppb
(0 to 5.43 ppb)

Testing Summary for Tribromoacetic acid

Are tests routinely required for Tribromoacetic acid by federal law?No
Water suppliers reporting tests for Tribromoacetic acid (2004-2009):932 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):1.0 per year


Type of concern: Reference:
One or more in vitro tests on mammalian cells show positive mutation results RTECS®- Environmental and Molecular Mutagenesis 2002

Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
RTECS®- Environmental and Molecular Mutagenesis 2002ACETIC ACID, TRIBROMO-• mutagenic - Positive mutation assay: DNA Damage (hamster ovr)


government/industry list/academic study reference
RTECS®- Environmental and Molecular Mutagenesis 2002RTECS®- Environmental and Molecular Mutagenesis. (Alan R. Liss, Inc., 41 E. 11th St., New York, NY 10003) V.10- 40,134,2002

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