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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Hawthorne Water Department

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
2013N/A00N/A
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND
20180.188 ppb161ND - 3.00 ppb
2019ND160ND

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
2014-02-1114021326-003ND
2014-02-1114021326-001ND
2014-02-1114021326-002ND
2014-02-1114021326-004ND
2014-05-1614053501-001ND
2014-05-1614053501-002ND
2014-05-1614053501-003ND
2014-05-1614053501-004ND
2014-08-181432959-04ND
2014-08-181432959-03ND
2014-08-181432959-02ND
2014-08-181432959-01ND
2014-11-181445620-03ND
2014-11-181445620-04ND
2014-11-181445620-02ND
2014-11-181445620-01ND
2015-02-131505368-04ND
2015-02-131505268-01ND
2015-02-131505368-03ND
2015-02-131505368-02ND
2015-05-121505B80-004ND
2015-05-121505B80-003ND
2015-05-121505B80-001ND
2015-05-121505B80-002ND
2015-08-111508C63-004ND
2015-08-111508C63-001ND
2015-08-111508C63-002ND
2015-08-111508C63-003ND
2015-11-13L5809166-3ND
2015-11-13L5809166-4ND
2015-11-13L5809166-1ND
2015-11-13L5809166-2ND
2016-02-16L6073616-4ND
2016-02-16L6073616-3ND
2016-02-16L6073616-2ND
2016-02-16L6073616-1ND
2016-05-133450361ND
2016-05-133450360ND
2016-05-133450362ND
2016-05-133450359ND
2016-08-12HA083016A-25ND
2016-08-12HA083016A-28ND
2016-08-12HA083016A-29ND
2016-08-12HA083016A-26ND
2016-11-14HA113016-20ND
2016-11-14HA113016-19ND
2016-11-14HA113016-22ND
2016-11-14HA113016-21ND
2017-02-16HA030317-31ND
2017-02-16HA030317-29ND
2017-02-16HA030317-32ND
2017-02-16HA030317-30ND
2017-05-15HA053117-18ND
2017-05-15HA053117-17ND
2017-05-15HA053117-15ND
2017-05-15HA053117-16ND
2017-08-16HA082917-36ND
2017-08-16HA082917-34ND
2017-08-16HA082917-35ND
2017-08-16HA082917-37ND
2017-11-14HA112117B-16ND
2017-11-14HA112117B-18ND
2017-11-14HA112117B-15ND
2017-11-14HA112117B-17ND
2018-02-157043272004-HAAND
2018-02-157043272003-HAAND
2018-02-157043272001-HAAND
2018-02-157043272002-HAAND
2018-05-147051899004-HAAND
2018-05-147051899003-HAA3.00 ppb
2018-05-147051899002-HAAND
2018-05-147051899001-HAAND
2018-08-16HA090118-18ND
2018-08-16HA090118-17ND
2018-08-16HA090118-19ND
2018-08-16HA090118-16ND
2018-11-157071441002-HAAND
2018-11-157071441001-HAAND
2018-11-157071441004-HAAND
2018-11-157071441003-HAAND
2019-02-147079695003-HAAND
2019-02-147079695004-HAAND
2019-02-147079695001-HAAND
2019-02-147079695002-HAAND
2019-05-167090070003-HAAND
2019-05-167090070002-HAAND
2019-05-167090070001-HAAND
2019-05-227090943001-HAAND
2019-08-1570101831004-HAAND
2019-08-1570101831003-HAAND
2019-08-1570101831001-HAAND
2019-08-1570101831002-HAAND
2019-11-1470112166003-HAAND
2019-11-1470112166001-HAAND
2019-11-1470112166002-HAAND
2019-11-1470112166004-HAAND