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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Crystal Lake

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

 

82

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
20151.22 ppb21ND - 2.43 ppb
2016ND160ND
2017ND160ND
2018ND160ND
20191.15 ppb208ND - 3.87 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
2014-02-1214021017-03ND
2014-02-1214021017-04ND
2014-02-1214021017-02ND
2014-02-1214021017-01ND
2014-05-0614050992-002ND
2014-05-0614050992-003ND
2014-05-0614050992-004ND
2014-05-0614050992-001ND
2014-08-1814082034-004AND
2014-08-1814082034-002ND
2014-08-1814082034-004ND
2014-08-1814082034-003ND
2015-08-0415080681-002ND
2015-08-0415080681-0012.43 ppb
2016-02-163402217ND
2016-02-163402219ND
2016-02-163402218ND
2016-02-163402216ND
2016-05-023440438ND
2016-05-023440439ND
2016-05-023440436ND
2016-05-023440437ND
2016-08-013513597ND
2016-08-013513600ND
2016-08-013513598ND
2016-08-013513599ND
2016-11-073581399ND
2016-11-073581400ND
2016-11-073581398ND
2016-11-073581397ND
2017-02-013631964ND
2017-02-013631965ND
2017-02-013631963ND
2017-02-013631966ND
2017-05-013685443ND
2017-05-013685444ND
2017-05-013685442ND
2017-05-013685445ND
2017-08-073750556ND
2017-08-073750557ND
2017-08-073750558ND
2017-08-073750555ND
2017-11-013812333ND
2017-11-013812335ND
2017-11-013812334ND
2017-11-013812332ND
2018-02-058020765-04ND
2018-02-058020765-03ND
2018-02-058020765-02ND
2018-02-058020765-01ND
2018-05-078051308-04ND
2018-05-078051308-01ND
2018-05-078051308-02ND
2018-05-078051308-03ND
2018-08-151808D73-001BND
2018-08-151808D73-002BND
2018-08-151808D73-003BND
2018-08-151808D73-004BND
2018-11-061811416-001BND
2018-11-061811416-002BND
2018-11-061811416-003BND
2018-11-061811416-004BND
2019-02-051902303-001BND
2019-02-051902303-002B2.86 ppb
2019-02-051902303-003B2.80 ppb
2019-02-051902303-004B2.30 ppb
2019-05-141905A88-001BND
2019-05-141905A88-002BND
2019-05-141905A88-003BND
2019-05-141905A88-004B2.89 ppb
2019-08-051908274-001B3.87 ppb
2019-08-051908274-004B3.18 ppb
2019-08-051908274-003B2.81 ppb
2019-08-051908274-002B2.19 ppb
2019-09-091909587-002BND
2019-09-091909587-004BND
2019-09-091909587-003BND
2019-09-091909587-001BND
2019-11-051911275-004BND
2019-11-051911275-003BND
2019-11-051911275-002BND
2019-11-051911275-001BND