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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Marion 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

 

92

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND160ND
201617.4 ppb168ND - 95.3 ppb
20170.188 ppb164ND - 0.840 ppb
2018ND160ND
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
2014-03-14L0040922-02ND
2014-03-14L0040922-01ND
2014-03-14L0040922-02ND
2014-03-14L0040922-01ND
2014-06-1135141749001ND
2014-06-1135141749002ND
2014-06-1135141749002ND
2014-06-1135141749001ND
2014-12-01L0051322-01ND
2014-12-01L0051322-02ND
2014-12-01L0051322-02ND
2014-12-01L0051322-01ND
2015-03-06LA4412-1ND
2015-03-06LA4412-2ND
2015-03-06LA4412-2ND
2015-03-06LA4412-1ND
2015-06-0535192244001ND
2015-06-0535192244002ND
2015-06-0535192244002ND
2015-06-0535192244001ND
2015-09-0235206017001ND
2015-09-0235206017002ND
2015-09-0235206017002ND
2015-09-0235206017001ND
2015-12-03LA41712-2ND
2015-12-03LA41712-2ND
2015-12-03LA14712-1ND
2015-12-03LA14712-1ND
2016-03-18LA18615-1ND
2016-03-18LA18615-2ND
2016-03-18LA18615-1ND
2016-03-18LA18615-2ND
2016-06-02LA21276-1ND
2016-06-02LA21276-2ND
2016-06-02LA21276-1ND
2016-06-02LA21276-2ND
2016-09-01LA24967-295.3 ppb
2016-09-01LA24967-295.3 ppb
2016-09-01LA24967-138.3 ppb
2016-09-01LA24967-138.3 ppb
2016-12-01LA28126-22.30 ppb
2016-12-01LA28126-22.30 ppb
2016-12-01LA28126-13.10 ppb
2016-12-01LA28126-13.10 ppb
2017-03-0235298606008ND
2017-03-0235298606007ND
2017-03-0235298606008ND
2017-03-0235298606007ND
2017-06-1935319531003ND
2017-06-1935319531004ND
2017-06-1935319531004ND
2017-06-1935319531003ND
2017-09-21353374520030.840 ppb
2017-09-21353374520040.660 ppb
2017-09-21353374520040.660 ppb
2017-09-21353374520030.840 ppb
2017-12-1835364711002ND
2017-12-1835364711001ND
2017-12-1835364711001ND
2017-12-1835364711002ND
2018-03-0135377823001ND
2018-03-0135377823002ND
2018-03-0135377823001ND
2018-03-0135377823002ND
2018-06-1935399870001ND
2018-06-1935399870002ND
2018-06-1935399870001ND
2018-06-1935399870002ND
2018-09-1835419426002ND
2018-09-1835419426001ND
2018-09-1835419426001ND
2018-09-1835419426002ND
2018-12-1735438495001ND
2018-12-1735438495002ND
2018-12-1735438495001ND
2018-12-1735438495002ND
2019-03-1835456301002ND
2019-03-1835456301001ND
2019-03-1835456301001ND
2019-03-1835456301002ND
2019-06-1135475531002ND
2019-06-1135475531002ND
2019-06-1135475531001ND
2019-06-1135475531001ND
2019-09-0635495673002ND
2019-09-0635495673001ND
2019-09-0635495673001ND
2019-09-0635495673002ND
2019-12-0535516919001ND
2019-12-0535516919002ND
2019-12-0535516919001ND
2019-12-0535516919002ND