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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

South Central Water Assn

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.

 

75

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
20133.71 ppb74ND - 9.00 ppb
20144.25 ppb1614ND - 8.00 ppb
20150.813 ppb163ND - 5.00 ppb
20161.11 ppb183ND - 7.00 ppb
20174.38 ppb168ND - 12.0 ppb

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
2012-02-28120229-010HAND
2012-10-30121031-007HAND
2013-02-13130214-004HAND
2013-04-16130417-006HAND
2013-07-17130718-022HA9.00 ppb
2013-10-23131024-005HAND
2013-10-23131024-006HA5.00 ppb
2013-10-23131024-011HA6.00 ppb
2013-10-23131024-012HA6.00 ppb
2014-01-30140130-001HAND
2014-01-30140130-002HAND
2014-01-30140130-003HA3.00 ppb
2014-01-30140130-004HA3.00 ppb
2014-04-30140501-024HA8.00 ppb
2014-04-30140501-023HA7.00 ppb
2014-04-30140501-022HA4.00 ppb
2014-04-30140501-021HA7.00 ppb
2014-07-30140731-040HA5.00 ppb
2014-07-30140731-041HA6.00 ppb
2014-07-30140731-042HA5.00 ppb
2014-07-30140731-043HA3.00 ppb
2014-10-29141031-004HA6.00 ppb
2014-10-29141031-003HA3.00 ppb
2014-10-29141031-002HA6.00 ppb
2014-10-29141031-001HA2.00 ppb
2015-01-26150127-015HAND
2015-01-26150127-016HAND
2015-01-26150127-017HAND
2015-01-26150127-018HAND
2015-04-29150430-023HAND
2015-04-29150430-024HA4.00 ppb
2015-04-29150430-025HAND
2015-04-29150430-026HAND
2015-07-29150730-024HAND
2015-07-29150730-023HAND
2015-07-29150730-022HAND
2015-07-29150730-021HAND
2015-10-28151029-024HA4.00 ppb
2015-10-28151029-023HA5.00 ppb
2015-10-28151029-022HAND
2015-10-28151029-021HAND
2016-02-01160202-034HAND
2016-02-01160202-033HAND
2016-02-01160202-030HA6.00 ppb
2016-02-01160202-029HAND
2016-04-18160420-015HAND
2016-04-18160420-016HAND
2016-04-18160420-018HAND
2016-04-18160420-019HAND
2016-08-22160823-036HAND
2016-08-22160823-035HAND
2016-08-22160823-034HAND
2016-08-22160823-033HAND
2016-09-21160923-009HAND
2016-09-21160923-010HAND
2016-09-21160923-011HAND
2016-09-21160923-012HAND
2016-10-25161027-015HA7.00 ppb
2016-10-25161027-014HA7.00 ppb
2017-01-17170118-006HA5.00 ppb
2017-01-17170118-007HA6.00 ppb
2017-01-17170118-008HA8.00 ppb
2017-01-17170118-009HA7.00 ppb
2017-05-01170503-005HA10.00 ppb
2017-05-01170503-006HA11.0 ppb
2017-05-01170503-007HA11.0 ppb
2017-05-01170503-008HA12.0 ppb
2017-09-13170915-004HAND
2017-09-13170915-003HAND
2017-09-13170915-002HAND
2017-09-14170915-001HAND
2017-10-24171025-008HAND
2017-10-24171025-007HAND
2017-10-24171025-006HAND
2017-11-28171129-029HAND