Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Highway 84 West Water Supply

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND60ND
2016ND100ND
20171.54 ppb206ND - 9.70 ppb
20180.320 ppb202ND - 3.20 ppb
20192.30 ppb1614ND - 4.00 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
2014-01-151270396ND
2014-01-151270395ND
2014-01-151270396ND
2014-01-151270395ND
2014-04-091291975ND
2014-04-091291976ND
2014-04-091291976ND
2014-04-091291975ND
2014-07-161318243ND
2014-07-161318244ND
2014-07-161318244ND
2014-07-161318243ND
2014-10-081340785ND
2014-10-081340786ND
2014-10-081340786ND
2014-10-081340785ND
2015-01-141364543ND
2015-01-141364544ND
2015-01-141364544ND
2015-01-141364543ND
2015-04-151387426ND
2015-04-151387426ND
2016-04-131482402ND
2016-04-131482402ND
2016-07-131506942ND
2016-07-131506943ND
2016-07-131506942ND
2016-07-131506943ND
2016-10-121532616ND
2016-10-121532617ND
2016-10-121532616ND
2016-10-121532617ND
2017-01-2535291490001ND
2017-01-2535291490002ND
2017-01-2535291490001ND
2017-01-2535291490002ND
2017-04-1835307670002ND
2017-04-1835307670001ND
2017-04-1835307670002ND
2017-04-1835307670001ND
2017-05-08353116100062.50 ppb
2017-05-08353116100053.20 ppb
2017-05-08353116100053.20 ppb
2017-05-08353116100062.50 ppb
2017-07-1835325121001ND
2017-07-1835325121002ND
2017-07-1835325121002ND
2017-07-1835325121001ND
2017-10-10353413870029.70 ppb
2017-10-1035341387001ND
2017-10-10353413870029.70 ppb
2017-10-1035341387001ND
2018-01-0935367842001ND
2018-01-0935367842002ND
2018-01-0935367842002ND
2018-01-0935367842001ND
2018-04-18353872650013.20 ppb
2018-04-1835387265002ND
2018-04-18353872650013.20 ppb
2018-04-1835387265002ND
2018-07-1035403780001ND
2018-07-1035403780002ND
2018-07-1035403780001ND
2018-07-1035403780002ND
2018-07-2535407308001ND
2018-07-2535407308002ND
2018-07-2535407308001ND
2018-07-2535407308002ND
2018-10-1035423917001ND
2018-10-1035423917002ND
2018-10-1035423917001ND
2018-10-1035423917002ND
2019-01-09354418050022.10 ppb
2019-01-09354418050012.60 ppb
2019-01-09354418050012.60 ppb
2019-01-09354418050022.10 ppb
2019-04-23354643440022.30 ppb
2019-04-23354643440022.30 ppb
2019-04-2335464344001ND
2019-04-2335464344001ND
2019-07-15354835200024.00 ppb
2019-07-15354835200014.00 ppb
2019-07-15354835200014.00 ppb
2019-07-15354835200024.00 ppb
2019-10-02355026070011.60 ppb
2019-10-02355026070021.80 ppb
2019-10-02355026070011.60 ppb
2019-10-02355026070021.80 ppb