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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City Corporation

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

 

93

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.456 ppb163ND - 2.70 ppb
20150.650 ppb144ND - 2.50 ppb
20161.20 ppb156ND - 3.70 ppb
20170.719 ppb165ND - 3.10 ppb
20180.844 ppb165ND - 3.40 ppb
20192.86 ppb1612ND - 9.70 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
2014-01-2014023005301ND
2014-01-2014023005101ND
2014-01-2014023005401ND
2014-01-2014023005201ND
2014-04-1514107009301ND
2014-04-1514107009401ND
2014-04-1514107009601ND
2014-04-1514107009501ND
2014-07-1614198014201ND
2014-07-16141980145012.50 ppb
2014-07-1614198014401ND
2014-07-16141980143012.70 ppb
2014-11-1214316005701ND
2014-11-1214316005901ND
2014-11-1214316005801ND
2014-11-12143160056012.10 ppb
2015-02-1015043005701ND
2015-02-1015043005601ND
2015-02-1015043005501ND
2015-02-1015043005801ND
2015-05-11151340035012.20 ppb
2015-05-1115134003401ND
2015-05-1115134003601ND
2015-05-11151340037012.30 ppb
2015-08-1015225003501ND
2015-08-1015225003401ND
2015-08-10152250036012.50 ppb
2015-11-1215317003301ND
2015-11-1215317003201ND
2015-11-12153170034012.10 ppb
2016-02-0916042009101ND
2016-02-0916042008901ND
2016-02-0916042008801ND
2016-05-1016133007001ND
2016-05-10161330071013.00 ppb
2016-05-10161330072012.30 ppb
2016-06-15161670018012.80 ppb
2016-08-09162230086013.10 ppb
2016-08-09162230083013.70 ppb
2016-08-09162230084013.10 ppb
2016-08-0916223008501ND
2016-11-0716314005801ND
2016-11-0716314005901ND
2016-11-0716314006001ND
2016-11-0716314006101ND
2017-01-3117033005301ND
2017-01-3117033005201ND
2017-01-3117033005401ND
2017-01-3117033005501ND
2017-05-23171450022012.20 ppb
2017-05-23171450020013.10 ppb
2017-06-2617179002001ND
2017-06-2617179002101ND
2017-08-0717222009701ND
2017-08-0717222009301ND
2017-08-07172220092012.00 ppb
2017-08-0717222009101ND
2017-11-0717313010701ND
2017-11-07173130106012.00 ppb
2017-11-0717313010501ND
2017-11-07173130108012.20 ppb
2018-02-0618039007701ND
2018-02-0618039007501ND
2018-02-0618039007401ND
2018-02-0618039007601ND
2018-05-0118122002301ND
2018-05-0118122002601ND
2018-05-0118122002501ND
2018-05-0118122002401ND
2018-07-31182130007013.40 ppb
2018-07-3118213000601ND
2018-07-31182130009012.60 ppb
2018-07-31182130008012.30 ppb
2018-10-2918305003601ND
2018-10-29183050035012.50 ppb
2018-10-29183050034012.70 ppb
2018-10-2918305003701ND
2019-01-29190310096012.40 ppb
2019-01-29190310097012.30 ppb
2019-01-29190310099012.50 ppb
2019-01-29190310098012.50 ppb
2019-04-22191150095013.50 ppb
2019-04-22191150098013.60 ppb
2019-04-22191150096013.50 ppb
2019-04-2219115009701ND
2019-07-22192060104016.80 ppb
2019-07-22192060103019.70 ppb
2019-07-22192060102014.40 ppb
2019-07-22192060105012.50 ppb
2019-10-1519290013601ND
2019-10-1519290013701ND
2019-10-15192900135012.00 ppb
2019-10-1519290013801ND