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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

La Canada Irrigation District

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

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.388 ppb81ND - 3.10 ppb
20150.263 ppb81ND - 2.10 ppb
2016ND80ND
20170.538 ppb82ND - 2.30 ppb
2018ND80ND
2019ND80ND

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
2014-03-243761-801-0820ND
2014-03-243761-800-0915ND
2014-06-233761-801-0955ND
2014-06-233761-800-1020ND
2014-09-223761-801-0955ND
2014-09-223761-800-09303.10 ppb
2014-12-243761-801-1025ND
2014-12-243761-800-1035ND
2015-03-233761-800-0950ND
2015-03-233761-801-08402.10 ppb
2015-06-223761-800-0950ND
2015-06-223761-801-1000ND
2015-09-283761-800-0930ND
2015-09-283761-801-0940ND
2015-12-283761-800-0900ND
2015-12-283761-801-0915ND
2016-03-283761-800-0855ND
2016-03-283761-801-0905ND
2016-06-273761-800-0930ND
2016-06-273761-801-0940ND
2016-09-263761-800-0930ND
2016-09-263761-801-0955ND
2016-12-273761-800-0905ND
2016-12-273761-801-0955ND
2017-03-273761-801-09502.30 ppb
2017-03-273761-800-0940ND
2017-06-263761-801-0920ND
2017-06-263761-800-08402.00 ppb
2017-09-253761-801-0955ND
2017-09-253761-800-0945ND
2017-12-263761-801-1025ND
2017-12-263761-800-1005ND
2018-03-263761-800-0915ND
2018-03-263761-801-0935ND
2018-06-253761-800-1010ND
2018-06-253761-801-1045ND
2018-09-243761-801-1030ND
2018-09-243761-800-1005ND
2018-12-263761-801-1020ND
2018-12-263761-800-1045ND
2019-03-253761-801-1040ND
2019-03-253761-800-1000ND
2019-06-243761-801-1100ND
2019-06-243761-800-1030ND
2019-09-233761-801-1030ND
2019-09-233761-800-1000ND
2019-12-233761-801-1015ND
2019-12-233761-800-1000ND