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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Madison

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

90

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
2016ND160ND
20170.857 ppb142ND - 7.00 ppb
20180.813 ppb164ND - 4.00 ppb
2019ND120ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-30140131-004HAND
2014-01-30140131-003HAND
2014-01-30140131-002HAND
2014-01-30140131-001HAND
2014-04-30140501-020HAND
2014-04-30140501-019HAND
2014-04-30140501-016HAND
2014-04-30140501-015HAND
2014-07-30140731-009HAND
2014-07-30140731-008HAND
2014-07-30140731-024HAND
2014-07-30140731-025HAND
2014-10-29141030-012HAND
2014-10-29141030-011HAND
2014-10-29141030-010HAND
2014-10-29141030-009HAND
2015-01-28150129-008HAND
2015-01-28150129-007HAND
2015-01-28150129-006HAND
2015-01-28150129-005HAND
2015-04-29150430-019HAND
2015-04-29150430-007HAND
2015-04-29150430-008HAND
2015-04-29150430-020HAND
2015-07-29150730-018HAND
2015-07-29150730-017HAND
2015-07-29150730-010HAND
2015-07-29150730-009HAND
2015-10-28151029-020HAND
2015-10-28151029-019HAND
2015-10-28151029-018HAND
2015-10-28151029-017HAND
2016-02-01160202-027HAND
2016-02-01160202-023HAND
2016-02-01160202-024HAND
2016-02-01160202-028HAND
2016-04-20160421-004HAND
2016-04-20160421-003HAND
2016-04-20160421-002HAND
2016-04-20160421-001HAND
2016-07-18160719-007HAND
2016-07-18160719-006HAND
2016-07-18160719-005HAND
2016-07-18160719-004HAND
2016-10-24161025-004HAND
2016-10-24161025-003HAND
2016-10-24161025-002HAND
2016-10-24161025-001HAND
2017-04-17170418-006HAND
2017-04-17170418-005HAND
2017-04-17170418-004HA5.00 ppb
2017-04-17170418-003HAND
2017-06-20170621-003HAND
2017-08-22170823-006HA7.00 ppb
2017-09-28170929-002HAND
2017-09-28170929-001HAND
2017-09-28170929-003HAND
2017-09-28170929-004HAND
2017-10-25171026-016HAND
2017-10-25171026-015HAND
2017-10-25171026-014HAND
2017-10-25171026-013HAND
2018-01-18180119-004HAND
2018-01-18180119-003HAND
2018-01-18180119-002HAND
2018-01-18180119-001HAND
2018-04-18180419-008HAND
2018-04-18180419-005HAND
2018-04-18180419-006HAND
2018-04-18180419-007HAND
2018-07-23180724-019HAND
2018-07-23180724-003HA3.00 ppb
2018-07-23180724-002HA3.00 ppb
2018-07-23180724-001HA4.00 ppb
2018-10-15181016-001HAND
2018-10-15181016-002HAND
2018-10-15181016-003HA3.00 ppb
2018-10-15181016-004HAND
2019-02-06190207-013HAND
2019-02-06190207-012HAND
2019-03-20190321-006HAND
2019-03-20190321-005HAND
2019-04-25190426-015HAND
2019-04-25190426-014HAND
2019-04-25190426-013HAND
2019-04-25190426-012HAND
2019-11-20191121-012HAND
2019-11-20191121-013HAND
2019-11-20191121-014HAND
2019-11-20191121-011HAND