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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Rockett SUD

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
20141.13 ppb167ND - 3.80 ppb
20150.288 ppb162ND - 2.50 ppb
2016ND160ND
2017ND160ND
20182.46 ppb1613ND - 4.10 ppb
20192.04 ppb1613ND - 8.60 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
2014-03-24Q14092470042.20 ppb
2014-03-24Q1409247003ND
2014-03-24Q1409247002ND
2014-03-24Q1409247001ND
2014-06-10Q1420328004ND
2014-06-10Q14203280032.00 ppb
2014-06-10Q1420328002ND
2014-06-10Q1420328001ND
2014-09-08Q1442028002ND
2014-09-08Q14420280012.10 ppb
2014-09-08Q14420280033.80 ppb
2014-09-08Q14420280043.60 ppb
2014-12-16Q1460152005ND
2014-12-16Q1460152004ND
2014-12-16Q14601520032.30 ppb
2014-12-16Q14601520022.00 ppb
2015-03-17Q1509845004ND
2015-03-17Q1509845003ND
2015-03-17Q1509845002ND
2015-03-17Q1509845001ND
2015-04-20Q15146320052.10 ppb
2015-04-20Q1514632006ND
2015-04-20Q1514632004ND
2015-04-20Q1514632003ND
2015-09-10Q1535227004ND
2015-09-10Q1535227003ND
2015-09-10Q1535227002ND
2015-09-10Q1535227001ND
2015-10-19Q1540891004ND
2015-10-19Q1540891003ND
2015-10-19Q15408910022.50 ppb
2015-10-19Q1540891001ND
2016-03-23Q1611953002ND
2016-03-23Q1611953001ND
2016-03-23Q1611953003ND
2016-03-23Q1611953004ND
2016-06-23Q1625813004ND
2016-06-23Q1625813003ND
2016-06-23Q1625813002ND
2016-06-23Q1625813001ND
2016-09-27Q1640406004ND
2016-09-27Q1640406003ND
2016-09-27Q1640406002ND
2016-09-27Q1640406001ND
2016-12-05Q1652664003ND
2016-12-05Q1652664006ND
2016-12-05Q1652664005ND
2016-12-05Q1652664004ND
2017-02-15Q1706575004ND
2017-02-15Q1706575003ND
2017-02-15Q1706575002ND
2017-02-15Q1706575001ND
2017-05-11Q1719465002ND
2017-05-11Q1719465004ND
2017-05-11Q1719465003ND
2017-05-11Q1719465001ND
2017-08-02Q1732094002ND
2017-08-02Q1732094001ND
2017-08-02Q1732094003ND
2017-08-02Q1732094004ND
2017-11-27Q1760054006ND
2017-11-27Q1760054005ND
2017-11-27Q1760054004ND
2017-11-27Q1760054003ND
2018-02-22Q1807469004ND
2018-02-22Q18074690021.10 ppb
2018-02-22Q1807469003ND
2018-02-22Q1807469001ND
2018-04-23Q18164100012.60 ppb
2018-04-23Q18164100033.50 ppb
2018-04-23Q18164100044.00 ppb
2018-04-23Q18164100024.10 ppb
2018-08-13Q18322190053.10 ppb
2018-08-13Q18322190022.60 ppb
2018-08-13Q18322190043.60 ppb
2018-08-13Q18322190012.00 ppb
2018-12-03Q18489440053.10 ppb
2018-12-03Q18489440022.90 ppb
2018-12-03Q18489440043.40 ppb
2018-12-03Q18489440013.40 ppb
2019-02-27Q19083600052.90 ppb
2019-02-27Q19083600042.50 ppb
2019-02-27Q19083600063.00 ppb
2019-02-27Q19083600073.10 ppb
2019-05-09Q19231610061.50 ppb
2019-05-09Q19231610051.80 ppb
2019-05-09Q19231610041.50 ppb
2019-05-09Q19231610031.000 ppb
2019-08-12Q1953425006ND
2019-08-12Q19534250051.20 ppb
2019-08-12Q19534250041.20 ppb
2019-08-12Q19534250031.90 ppb
2019-12-04Q19790710032.50 ppb
2019-12-04Q19790710068.60 ppb
2019-12-04Q1979071005ND
2019-12-04Q1979071004ND