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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

South Island PSD

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND160ND
2015ND120ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-02-192140220-3ND
2014-02-192140220-2ND
2014-02-192140220-5ND
2014-02-192140220-4ND
2014-05-132140514-2ND
2014-05-132140514-3ND
2014-05-132140514-4ND
2014-05-132140514-5ND
2014-08-122140813-2ND
2014-08-122140813-3ND
2014-08-122140813-4ND
2014-08-122140813-5ND
2014-11-172141118-4ND
2014-11-172141118-5ND
2014-11-172141118-3ND
2014-11-172141118-2ND
2015-05-132150514-12ND
2015-05-132150514-13ND
2015-05-132150514-14ND
2015-05-132150514-15ND
2015-08-192150820-6ND
2015-08-192150820-7ND
2015-08-192150820-8ND
2015-08-192150820-9ND
2015-11-172151118-2ND
2015-11-172151118-5ND
2015-11-172151118-3ND
2015-11-172151118-4ND
2016-02-162160217-09ND
2016-02-162160217-08ND
2016-02-162160217-10ND
2016-02-162160217-11ND
2016-05-182160519-3ND
2016-05-182160519-2ND
2016-05-182160519-4ND
2016-05-182160519-5ND
2016-08-162160818-17ND
2016-08-162160818-19ND
2016-08-162160818-18ND
2016-08-162160818-16ND
2016-12-122161214-02ND
2016-12-122161214-04ND
2016-12-122161214-03ND
2016-12-122161214-05ND
2017-02-162170217-05ND
2017-02-162170217-04ND
2017-02-162170217-03ND
2017-02-162170217-02ND
2017-05-172170519-20ND
2017-05-172170519-21ND
2017-05-172170519-22ND
2017-05-172170519-23ND
2017-08-142170815-15ND
2017-08-142170815-14ND
2017-08-142170815-13ND
2017-08-142170815-12ND
2017-11-162171117-32ND
2017-11-162171117-33ND
2017-11-162171117-34ND
2017-11-162171117-35ND
2018-02-152180216-05ND
2018-02-152180216-04ND
2018-02-152180216-03ND
2018-02-152180216-02ND
2018-05-162180517-21ND
2018-05-162180517-18ND
2018-05-162180517-19ND
2018-05-162180517-20ND
2018-08-172180821-33ND
2018-08-172180821-32ND
2018-08-172180821-31ND
2018-08-172180821-30ND
2018-11-142181115-02ND
2018-11-142181115-03ND
2018-11-142181115-04ND
2018-11-142181115-05ND
2019-02-222190226-02ND
2019-02-222190226-03ND
2019-02-222190226-04ND
2019-02-222190226-05ND
2019-05-142190516-08ND
2019-05-142190516-11ND
2019-05-142190516-10ND
2019-05-142190516-09ND
2019-08-132190815-23ND
2019-08-132190815-25ND
2019-08-132190815-24ND
2019-08-132190815-22ND
2019-11-132191115-09ND
2019-11-132191115-08ND
2019-11-132191115-07ND
2019-11-132191115-06ND