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National Drinking Water Database

National Drinking Water Database - Chemical Contaminants


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

Chloramine is a disinfection agent used for drinking water treatment. [read more]

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

Health Concerns for Chloramine:

Chloramine Exposure by State

Water utilities in 1 states have reported detecting Chloramine in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Chloramine contamination

The Most Polluted Communities

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

Ranked by highest average Chloramine level

RankSystem Population Served Positive test results of total reported tests Average Level
1Cottage Grove Waterworks
Cottage Grove, WI
5,4331 of 1260 ppb
(260 ppb)

Health Based Limits for Chloramine

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.3000 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.3500 ppb

Testing Summary for Chloramine

Are tests routinely required for Chloramine by federal law?No
Water suppliers reporting tests for Chloramine (2004-2005):3 of 47,576
Average testing rate for water supplier reporting tests (2004-2005):0.5 per year

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Limited evidence of respiratory toxicity National Library of Medicine HazMap


Type of concern: Reference:
One or more in vitro tests non-mammalian cells show positive mutation results RTECS®- Science 1976
One or more in vitro tests on microorganisms show positive mutation results RTECS®- Mutagenesis 1989

Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
National Library of Medicine HazMapCHLORAMIDE•Toxic Pneumonitis: Yes;
•Methemoglobinemia: Methemoglobinemia, Secondary;
RTECS®- Mutagenesis 1989CHLORAMIDE• mutagenic - Positive mutation assay: Micronucleus test (non-mammalian species mul)
RTECS®- Science 1976CHLORAMIDE• mutagenic - Positive mutation assay: Mutation in Micro-organism (Bacillus subtilis )
• mutagenic - Positive mutation assay: DNA repair (Bacillus subtilis )


government/industry list/academic study reference
National Library of Medicine HazMapNLM (National Library of Medicine). 2006. HazMap — Occupational Exposure to Hazardous Agents.
RTECS®- Mutagenesis 1989RTECS®- Mutagenesis. (Oxford Univ. Press, Pinkhill House, Southfield Road, Eynsham, Oxford OX8 1JJ, UK) V.1- 4,170,1989
RTECS®- Science 1976RTECS®- Science. (American Assoc. for the Advancement of Science, 1333 H St., NW, Washington, DC 20005) V.1- 192,1141,1976

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