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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Aqua Pa Roaring Creek Division

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

 

63

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
20171.70 ppb166ND - 7.10 ppb
20182.24 ppb3122ND - 6.10 ppb
20191.10 ppb1610ND - 2.90 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
2017-02-1315717844ND
2017-02-1315717808ND
2017-02-1315717820ND
2017-02-1315717832ND
2017-05-10161695543.40 ppb
2017-05-10161695427.10 ppb
2017-05-10161695665.70 ppb
2017-05-10161695786.00 ppb
2017-08-1416639269ND
2017-08-1416639287ND
2017-08-1416639281ND
2017-08-14166392752.50 ppb
2017-11-1317086265ND
2017-11-1317086271ND
2017-11-13170862592.50 ppb
2017-11-1317086253ND
2018-02-12AF76224ND
2018-02-12AF76223ND
2018-02-12AF762222.00 ppb
2018-02-12AF762212.40 ppb
2018-05-11AF839992.50 ppb
2018-05-11AF839982.70 ppb
2018-05-11AF840002.80 ppb
2018-05-11AF84001ND
2018-08-13AF926905.80 ppb
2018-08-13AF926916.10 ppb
2018-08-13AF92689ND
2018-08-13AF92692ND
2018-09-27AF971352.80 ppb
2018-09-27AF971372.50 ppb
2018-09-27AF971363.20 ppb
2018-09-27AF97134ND
2018-09-28AF97138ND
2018-09-28AF971402.90 ppb
2018-09-28AF971413.00 ppb
2018-09-28AF971392.60 ppb
2018-09-29AF972422.40 ppb
2018-09-29AF972402.40 ppb
2018-09-29AF972412.40 ppb
2018-09-29AF97243ND
2018-09-30AF972922.50 ppb
2018-09-30AF972452.30 ppb
2018-09-30AF972462.20 ppb
2018-11-1430021850034.40 ppb
2018-11-1430021850014.50 ppb
2018-11-1430021850025.10 ppb
2018-11-143002185004ND
2019-02-12AG087351.80 ppb
2019-02-12AG087341.90 ppb
2019-02-12AG087331.80 ppb
2019-02-12AG08736ND
2019-05-14AG17715ND
2019-05-14AG17713ND
2019-05-14AG177121.30 ppb
2019-05-14AG17714ND
2019-08-13AG280182.50 ppb
2019-08-13AG28015ND
2019-08-13AG280162.90 ppb
2019-08-13AG280172.30 ppb
2019-11-12AG393591.000 ppb
2019-11-12AG393581.000 ppb
2019-11-12AG39357ND
2019-11-12AG393561.10 ppb