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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Snohomish City Of

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

 

107

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.157 ppb141ND - 2.20 ppb
20150.389 ppb183ND - 2.40 ppb
20160.494 ppb184ND - 2.30 ppb
20170.653 ppb194ND - 3.80 ppb
20180.252 ppb212ND - 3.10 ppb
20190.747 ppb174ND - 3.80 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
2014-01-0801202ND
2014-01-0801415ND
2014-04-1415570ND
2014-04-1415569ND
2014-04-1415568ND
2014-04-14155672.20 ppb
2014-07-1030163ND
2014-07-1030162ND
2014-07-1030164ND
2014-07-1430515ND
2014-10-1646726ND
2014-10-1646724ND
2014-10-1646725ND
2014-10-2147445ND
2015-01-1402338ND
2015-01-1402337ND
2015-01-1402336ND
2015-01-1402335ND
2015-04-15162522.40 ppb
2015-04-1516254ND
2015-04-15162532.30 ppb
2015-04-1516255ND
2015-05-2824176ND
2015-05-2824177ND
2015-07-15325092.30 ppb
2015-07-1532508ND
2015-07-1532507ND
2015-07-1532510ND
2015-10-1449979ND
2015-10-1549976ND
2015-10-1549977ND
2015-10-1549978ND
2016-01-12ND
2016-01-12ND
2016-01-12ND
2016-01-13ND
2016-04-132.20 ppb
2016-04-132.20 ppb
2016-04-13ND
2016-04-13ND
2016-04-132.30 ppb
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-10-122.20 ppb
2016-10-12ND
2016-10-12ND
2016-10-12ND
2017-01-18ND
2017-01-18ND
2017-01-18ND
2017-01-18ND
2017-01-18ND
2017-04-133.80 ppb
2017-04-13ND
2017-04-133.20 ppb
2017-04-132.00 ppb
2017-04-13ND
2017-07-12ND
2017-07-123.40 ppb
2017-07-12ND
2017-07-12ND
2017-10-12ND
2017-10-12ND
2017-10-12ND
2017-10-12ND
2017-10-12ND
2018-01-102.20 ppb
2018-01-10ND
2018-01-10ND
2018-01-10ND
2018-01-10ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-07-11ND
2018-07-11ND
2018-07-11ND
2018-07-11ND
2018-07-11ND
2018-07-11ND
2018-10-08ND
2018-10-08ND
2018-10-083.10 ppb
2018-10-08ND
2018-10-08ND
2019-01-09ND
2019-01-092.80 ppb
2019-01-09ND
2019-01-09ND
2019-04-10ND
2019-04-10ND
2019-04-10ND
2019-04-10ND
2019-07-11ND
2019-07-11ND
2019-07-113.50 ppb
2019-07-11ND
2019-07-112.60 ppb
2019-10-10ND
2019-10-103.80 ppb
2019-10-10ND
2019-10-10ND