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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

SNO PUD 1 - Lake Stevens

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

 

135

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.548 ppb235ND - 3.00 ppb
20150.500 ppb215ND - 2.20 ppb
20160.447 ppb153ND - 2.70 ppb
20170.670 ppb204ND - 4.20 ppb
20181.51 ppb208ND - 5.60 ppb
20190.242 ppb364ND - 2.50 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
2014-02-1907462ND
2014-02-1907463ND
2014-02-1907458ND
2014-02-1907459ND
2014-02-1907460ND
2014-05-1921294ND
2014-05-1921293ND
2014-05-1921295ND
2014-05-1921296ND
2014-05-20215612.10 ppb
2014-05-2021560ND
2014-08-1836781ND
2014-08-18367802.40 ppb
2014-08-1836784ND
2014-08-1836785ND
2014-08-18367832.70 ppb
2014-08-18367822.40 ppb
2014-11-2052046ND
2014-11-2052050ND
2014-11-20520493.00 ppb
2014-11-2052048ND
2014-11-2052051ND
2014-11-2052047ND
2015-02-1706915ND
2015-02-17071422.10 ppb
2015-02-17069142.20 ppb
2015-02-17069132.10 ppb
2015-02-18071432.10 ppb
2015-02-18071412.00 ppb
2015-05-1821958ND
2015-05-1821957ND
2015-05-1821959ND
2015-05-1922239ND
2015-05-1922238ND
2015-08-1738155ND
2015-08-1738158ND
2015-08-1738154ND
2015-08-1738156ND
2015-08-1738157ND
2015-11-2356343ND
2015-11-2356341ND
2015-11-2356344ND
2015-11-2356340ND
2015-11-2356342ND
2016-02-17ND
2016-02-17ND
2016-02-17ND
2016-02-17ND
2016-02-17ND
2016-05-16ND
2016-05-16ND
2016-05-16ND
2016-05-17ND
2016-05-17ND
2016-11-152.70 ppb
2016-11-15ND
2016-11-15ND
2016-11-152.00 ppb
2016-11-152.00 ppb
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-05-153.40 ppb
2017-05-15ND
2017-05-152.50 ppb
2017-05-163.30 ppb
2017-05-164.20 ppb
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-11-15ND
2017-11-15ND
2017-11-15ND
2017-11-15ND
2017-11-15ND
2018-02-264.90 ppb
2018-02-264.50 ppb
2018-02-265.20 ppb
2018-02-265.60 ppb
2018-02-26ND
2018-05-15ND
2018-05-15ND
2018-05-15ND
2018-05-15ND
2018-05-15ND
2018-08-20ND
2018-08-203.30 ppb
2018-08-20ND
2018-08-202.20 ppb
2018-08-202.30 ppb
2018-11-08ND
2018-11-082.10 ppb
2018-11-08ND
2018-11-08ND
2018-11-08ND
2019-02-262.00 ppb
2019-02-262.00 ppb
2019-02-26ND
2019-02-26ND
2019-02-26ND
2019-03-29ND
2019-03-29ND
2019-03-29ND
2019-03-29ND
2019-05-16ND
2019-05-16ND
2019-05-16ND
2019-05-16ND
2019-05-16ND
2019-05-17ND
2019-05-17ND
2019-05-17ND
2019-05-17ND
2019-08-15ND
2019-08-15ND
2019-08-15ND
2019-08-15ND
2019-08-15ND
2019-08-22ND
2019-08-22ND
2019-08-22ND
2019-08-22ND
2019-11-072.20 ppb
2019-11-072.50 ppb
2019-11-07ND
2019-11-07ND
2019-11-07ND
2019-11-08ND
2019-11-08ND
2019-11-08ND
2019-11-08ND