Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

City of West

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

 

32

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
2017ND40ND
20180.375 ppb81ND - 3.00 ppb
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
2014-02-17AC43240ND
2014-04-24AC51720ND
2014-08-21AC64881ND
2014-11-20AC72685ND
2015-03-18AC85011ND
2015-04-20AC88808ND
2015-07-01AC98215ND
2015-10-22AD11494ND
2016-01-14AD18201ND
2016-05-24AD38007ND
2016-07-28AD46173ND
2016-10-17AD53562ND
2017-02-06AD69192ND
2017-04-04AD78554ND
2017-08-14AD92831ND
2017-10-31AE03193ND
2018-02-13AE13520ND
2018-02-13AE13519ND
2018-05-02AE24777ND
2018-05-02AE24755ND
2018-07-17AE33564ND
2018-07-17AE33566ND
2018-10-11AE43219ND
2018-10-11AE432253.00 ppb
2019-03-12AE58023ND
2019-03-12AE58030ND
2019-04-18AE62944ND
2019-04-18AE62945ND
2019-08-12AE77973ND
2019-08-12AE77971ND
2019-11-04AE88290ND
2019-11-04AE88287ND