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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

New Mexico State University

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
20160.312 ppb165ND - 1.30 ppb
20172.36 ppb169ND - 11.0 ppb
20181.09 ppb1612ND - 2.90 ppb
20190.463 ppb166ND - 2.00 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
2014-01-081401334-004BND
2014-01-081401334-001BND
2014-01-081401334-003BND
2014-01-081401334-002BND
2014-04-141404785-001BND
2014-04-161404784-001BND
2014-04-161404788-001BND
2014-04-161404787-001BND
2014-07-101407546-001BND
2014-07-101407543-001BND
2014-07-101407545-001BND
2014-07-101407544-001BND
2014-10-021410163-001BND
2014-10-021410166-001BND
2014-10-021410168-001BND
2014-10-021410170-001BND
2015-01-131501427-001BND
2015-01-131501428-001BND
2015-01-131501425-001BND
2015-01-131501426-001BND
2015-04-091504583-001BND
2015-04-091504585-001BND
2015-04-091504582-001BND
2015-04-091504584-001BND
2015-07-082015019801ND
2015-07-082015019803ND
2015-07-082015019804ND
2015-07-082015019802ND
2015-10-052015030161ND
2015-10-052015030162ND
2015-10-052015030160ND
2015-10-052015030159ND
2016-01-2020160018331.30 ppb
2016-01-2020160018311.20 ppb
2016-01-2020160018301.10 ppb
2016-01-202016001832ND
2016-04-252016011646ND
2016-04-252016011648ND
2016-04-252016011645ND
2016-04-2520160116470.640 ppb
2016-07-1320160201180.750 ppb
2016-07-132016020117ND
2016-07-132016020119ND
2016-07-132016020116ND
2016-10-252016031047ND
2016-10-252016031046ND
2016-10-252016031045ND
2016-10-252016031044ND
2017-01-1120170009905.80 ppb
2017-01-11201700099311.0 ppb
2017-01-1120170009918.00 ppb
2017-01-1120170009927.00 ppb
2017-04-1920170114691.20 ppb
2017-04-192017011468ND
2017-04-192017011467ND
2017-04-192017011466ND
2017-07-252017021527ND
2017-07-252017021526ND
2017-07-252017021525ND
2017-07-2520170215281.10 ppb
2017-10-2320170305851.60 ppb
2017-10-2320170305841.20 ppb
2017-10-2320170305860.930 ppb
2017-10-232017030583ND
2018-01-2320180022881.10 ppb
2018-01-2320180022870.840 ppb
2018-01-2320180022861.000 ppb
2018-01-2320180022851.60 ppb
2018-04-252018011471ND
2018-04-252018011468ND
2018-04-252018011469ND
2018-04-2520180114701.30 ppb
2018-07-1620180195822.90 ppb
2018-07-1620180195812.10 ppb
2018-07-1620180195802.60 ppb
2018-07-1620180195791.10 ppb
2018-10-2520180304641.20 ppb
2018-10-2520180304650.970 ppb
2018-10-2520180304660.760 ppb
2018-10-252018030467ND
2019-01-092019000872ND
2019-01-0920190008731.10 ppb
2019-01-0920190008741.40 ppb
2019-01-092019000875ND
2019-04-022019008413ND
2019-04-0220190084160.750 ppb
2019-04-022019008415ND
2019-04-0220190084141.20 ppb
2019-07-0820190185532.00 ppb
2019-07-082019018555ND
2019-07-082019018554ND
2019-07-082019018552ND
2019-10-142019029529ND
2019-10-142019029528ND
2019-10-1420190295270.950 ppb
2019-10-152019029530ND