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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Warden Water System

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

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
20170.625 ppb164ND - 2.90 ppb
20180.238 ppb162ND - 1.90 ppb
20190.138 ppb162ND - 1.10 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
2014-10-221344382ND
2014-10-221344381ND
2014-10-221344382ND
2014-10-221344381ND
2015-10-071433311ND
2015-10-071433312ND
2015-10-071433312ND
2015-10-071433311ND
2016-10-251535739ND
2016-10-251535740ND
2016-10-251535740ND
2016-10-251535739ND
2017-01-2435290897001ND
2017-01-2435290897002ND
2017-01-2435290897002ND
2017-01-2435290897001ND
2017-04-0535305186007ND
2017-04-0535305186008ND
2017-04-0535305186007ND
2017-04-0535305186008ND
2017-07-1435324179025ND
2017-07-1435324179026ND
2017-07-1435324179025ND
2017-07-1435324179026ND
2017-10-10353413760012.90 ppb
2017-10-10353413760022.10 ppb
2017-10-10353413760012.90 ppb
2017-10-10353413760022.10 ppb
2018-01-1135368393002ND
2018-01-1135368393001ND
2018-01-1135368393002ND
2018-01-1135368393001ND
2018-04-1735386950002ND
2018-04-1735386950001ND
2018-04-1735386950002ND
2018-04-1735386950001ND
2018-07-1235404346002ND
2018-07-12354043460011.90 ppb
2018-07-1235404346002ND
2018-07-12354043460011.90 ppb
2018-10-0235421775001ND
2018-10-0235421775002ND
2018-10-0235421775001ND
2018-10-0235421775002ND
2019-01-1035441811002ND
2019-01-10354418110011.10 ppb
2019-01-10354418110011.10 ppb
2019-01-1035441811002ND
2019-04-1135461259002ND
2019-04-1135461259002ND
2019-04-1135461259001ND
2019-04-1135461259001ND
2019-07-1635483194002ND
2019-07-1635483194001ND
2019-07-1635483194001ND
2019-07-1635483194002ND
2019-10-1435506292001ND
2019-10-1435506292002ND
2019-10-1435506292001ND
2019-10-1435506292002ND