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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

City of Port Angeles

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.

 

74

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND50ND
2014ND170ND
2015ND160ND
2016ND160ND
2017ND160ND

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
2012-01-0400687ND
2012-04-2615326ND
2012-07-0525589ND
2012-10-0339939ND
2013-01-0901465ND
2013-04-1114186ND
2013-08-2135719ND
2013-10-0242924ND
2013-10-0242923ND
2014-01-0200270ND
2014-01-1502629ND
2014-01-1502630ND
2014-01-1502628ND
2014-01-1502627ND
2014-04-1015400ND
2014-04-1015402ND
2014-04-1015399ND
2014-04-1015401ND
2014-07-1731438ND
2014-07-1731437ND
2014-07-1731439ND
2014-07-1731436ND
2014-10-1546545ND
2014-10-1546555ND
2014-10-1546556ND
2014-10-1546554ND
2015-01-1402343ND
2015-01-1402342ND
2015-01-1402341ND
2015-01-1402340ND
2015-04-1516265ND
2015-04-1516266ND
2015-04-1516264ND
2015-04-1516263ND
2015-07-1632811ND
2015-07-1632813ND
2015-07-1632812ND
2015-07-1632810ND
2015-10-1449743ND
2015-10-1449741ND
2015-10-1449740ND
2015-10-1449742ND
2016-01-27ND
2016-01-27ND
2016-01-27ND
2016-01-27ND
2016-05-04ND
2016-05-04ND
2016-05-04ND
2016-05-04ND
2016-07-28ND
2016-07-28ND
2016-07-28ND
2016-07-28ND
2016-10-06ND
2016-10-06ND
2016-10-06ND
2016-10-06ND
2017-02-15ND
2017-02-15ND
2017-02-15ND
2017-02-15ND
2017-05-10ND
2017-05-10ND
2017-05-10ND
2017-05-10ND
2017-08-02ND
2017-08-02ND
2017-08-02ND
2017-08-02ND
2017-10-11ND
2017-10-11ND
2017-10-11ND
2017-10-11ND