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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Chatham Water System

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
20161.50 ppb168ND - 5.00 ppb
20171.98 ppb166ND - 8.60 ppb
20183.60 ppb1612ND - 7.70 ppb
20191.23 ppb166ND - 4.00 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
2014-02-06L0039520-02ND
2014-02-06L0039520-01ND
2014-02-06L0039520-02ND
2014-02-06L0039520-01ND
2014-04-10L0041805-01ND
2014-04-10L0041805-02ND
2014-04-10L0041805-02ND
2014-04-10L0041805-01ND
2014-07-1735147489001ND
2014-07-1735147489002ND
2014-07-1735147489002ND
2014-07-1735147489001ND
2014-10-21L0049649-01ND
2014-10-21L0049649-02ND
2014-10-21L0049649-02ND
2014-10-21L0049649-01ND
2015-01-05L0052747-01ND
2015-01-05L0052747-02ND
2015-01-05L0052747-02ND
2015-01-05L0052747-01ND
2015-04-21LA6119-1ND
2015-04-21LA6119-2ND
2015-04-21LA6119-2ND
2015-04-21LA6119-1ND
2015-07-1735198574002ND
2015-07-1735198574001ND
2015-07-1735198574002ND
2015-07-1735198574001ND
2015-10-20LA12996-1ND
2015-10-20LA12996-2ND
2015-10-20LA12996-2ND
2015-10-20LA12996-1ND
2016-01-14LA16125-10.920 ppb
2016-01-14LA16125-21.20 ppb
2016-01-14LA16125-21.20 ppb
2016-01-14LA16125-10.920 ppb
2016-04-28LA19989-2ND
2016-04-28LA19989-1ND
2016-04-28LA19989-2ND
2016-04-28LA19989-1ND
2016-07-26LA23560-1ND
2016-07-26LA23560-2ND
2016-07-26LA23560-2ND
2016-07-26LA23560-1ND
2016-10-27LA26992-14.90 ppb
2016-10-27LA26992-25.00 ppb
2016-10-27LA26992-25.00 ppb
2016-10-27LA26992-14.90 ppb
2017-01-1335289008002ND
2017-01-1335289008001ND
2017-01-1335289008001ND
2017-01-1335289008002ND
2017-04-06353051860015.50 ppb
2017-04-06353051860015.50 ppb
2017-04-06353051860028.60 ppb
2017-04-06353051860028.60 ppb
2017-07-13353241790011.70 ppb
2017-07-1335324179002ND
2017-07-13353241790011.70 ppb
2017-07-1335324179002ND
2017-10-1035341380002ND
2017-10-1035341380001ND
2017-10-1035341380001ND
2017-10-1035341380002ND
2018-01-05353667280023.80 ppb
2018-01-05353667280015.40 ppb
2018-01-05353667280023.80 ppb
2018-01-05353667280015.40 ppb
2018-04-1635386942001ND
2018-04-1635386942001ND
2018-04-2635388790001ND
2018-04-2635388790001ND
2018-07-23354064900027.70 ppb
2018-07-23354064900015.90 ppb
2018-07-23354064900015.90 ppb
2018-07-23354064900027.70 ppb
2018-10-16354250850012.00 ppb
2018-10-16354250850024.00 ppb
2018-10-16354250850012.00 ppb
2018-10-16354250850024.00 ppb
2019-01-09354418130024.00 ppb
2019-01-09354418130013.30 ppb
2019-01-09354418130013.30 ppb
2019-01-09354418130024.00 ppb
2019-04-0935461256002ND
2019-04-0935461256002ND
2019-04-0935461256001ND
2019-04-0935461256001ND
2019-07-1035481800002ND
2019-07-1035481800001ND
2019-07-1035481800001ND
2019-07-1035481800002ND
2019-10-03355028770012.50 ppb
2019-10-0335502877002ND
2019-10-03355028770012.50 ppb
2019-10-0335502877002ND