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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Calif State Polytechnical Univ - Pomona

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

 

79

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.53 ppb93ND - 11.0 ppb
20153.63 ppb147ND - 12.0 ppb
20161.83 ppb121ND - 22.0 ppb
20172.53 ppb164ND - 14.0 ppb
2018ND160ND
20191.74 ppb124ND - 6.00 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
2014-03-184790-803-1030ND
2014-03-184790-802-1140ND
2014-03-184790-801-1010ND
2014-03-184790-800-1215ND
2014-06-174790-803-120011.0 ppb
2014-06-174790-802-1015ND
2014-06-174790-801-11308.80 ppb
2014-06-174790-800-09453.00 ppb
2014-12-164790-800-1155ND
2015-03-174790-800-1150ND
2015-03-174790-800-0000ND
2015-06-164790-803-08406.40 ppb
2015-06-164790-802-103011.0 ppb
2015-06-164790-801-094012.0 ppb
2015-06-164790-800-1015ND
2015-09-154790-802-1235ND
2015-09-154790-800-1125ND
2015-09-154790-801-1050ND
2015-09-154790-803-1100ND
2015-12-154790-802-12306.00 ppb
2015-12-154790-801-11404.70 ppb
2015-12-154790-803-11254.40 ppb
2015-12-154790-800-12156.30 ppb
2016-06-214790-800-112022.0 ppb
2016-06-214790-802-1100ND
2016-06-214790-801-0940ND
2016-06-214790-803-0950ND
2016-09-204790-802-1115ND
2016-09-204790-803-1010ND
2016-09-204790-801-1025ND
2016-09-204790-800-1050ND
2016-12-204790-802-1045ND
2016-12-204790-803-0940ND
2016-12-204790-801-1010ND
2016-12-204790-800-1035ND
2017-03-214790-803-0950ND
2017-03-214790-802-1045ND
2017-03-214790-801-1010ND
2017-03-214790-800-1100ND
2017-06-204790-802-1040ND
2017-06-204790-803-0930ND
2017-06-204790-800-1020ND
2017-06-204790-801-0950ND
2017-09-194790-803-09408.30 ppb
2017-09-194790-802-10459.70 ppb
2017-09-194790-801-10058.40 ppb
2017-09-194790-800-102014.0 ppb
2017-12-204790-803-1400ND
2017-12-204790-800-1430ND
2017-12-204790-802-1420ND
2017-12-204790-801-1410ND
2018-03-204790-802-1035ND
2018-03-204790-800-1010ND
2018-03-204790-803-0930ND
2018-03-204790-801-0945ND
2018-06-194790-800-1040ND
2018-06-194790-802-1105ND
2018-06-194790-803-1205ND
2018-06-194790-801-1150ND
2018-09-184790-803-1000ND
2018-09-184790-800-1105ND
2018-09-184790-802-1135ND
2018-09-184790-801-1030ND
2018-12-184790-801-1120ND
2018-12-184790-803-1104ND
2018-12-184790-800-1218ND
2018-12-184790-802-1204ND
2019-03-194790-801-1200ND
2019-03-194790-802-1245ND
2019-03-194790-800-1230ND
2019-03-194790-803-1135ND
2019-09-174790-800-1215ND
2019-09-174790-803-1130ND
2019-09-174790-801-1115ND
2019-09-174790-802-1235ND
2019-12-174790-803-10354.50 ppb
2019-12-174790-800-12054.70 ppb
2019-12-174790-801-10206.00 ppb
2019-12-174790-802-12255.70 ppb