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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Orange County WCID 1

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
20150.269 ppb162ND - 2.30 ppb
2016ND160ND
20170.163 ppb161ND - 2.60 ppb
2018ND160ND
20190.488 ppb163ND - 3.00 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
2014-02-11AC42209ND
2014-02-11AC42211ND
2014-02-11AC42188ND
2014-02-11AC42208ND
2014-04-17AC51036ND
2014-04-17AC51035ND
2014-04-17AC51037ND
2014-04-17AC51038ND
2014-09-16AC67130ND
2014-09-16AC67133ND
2014-09-16AC67131ND
2014-09-16AC67132ND
2014-12-19AC75622ND
2014-12-19AC75634ND
2014-12-19AC75613ND
2014-12-19AC75617ND
2015-02-26AC82056ND
2015-02-26AC82065ND
2015-02-26AC82062ND
2015-02-26AC82086ND
2015-04-09AC878282.00 ppb
2015-04-09AC87827ND
2015-04-09AC87834ND
2015-04-09AC878252.30 ppb
2015-09-02AD05318ND
2015-09-02AD05291ND
2015-09-02AD05317ND
2015-09-02AD05298ND
2015-11-19AD14187ND
2015-11-19AD14186ND
2015-11-19AD14189ND
2015-11-19AD14188ND
2016-02-23AD25010ND
2016-02-23AD25005ND
2016-02-23AD25004ND
2016-02-23AD25003ND
2016-05-18AD37251ND
2016-05-18AD37250ND
2016-05-18AD37252ND
2016-05-18AD37207ND
2016-09-27AD51371ND
2016-09-27AD51385ND
2016-09-27AD51387ND
2016-09-27AD51367ND
2016-11-21AD58803ND
2016-11-21AD58801ND
2016-11-21AD58800ND
2016-11-21AD58804ND
2017-02-21AD71219ND
2017-02-21AD71220ND
2017-02-21AD71221ND
2017-02-21AD71222ND
2017-05-23AD85233ND
2017-05-23AD85229ND
2017-05-23AD85230ND
2017-05-23AD85231ND
2017-08-25AD944362.60 ppb
2017-08-25AD94434ND
2017-08-25AD94435ND
2017-08-25AD94437ND
2017-11-07AE04048ND
2017-11-07AE04046ND
2017-11-07AE04047ND
2017-11-07AE04045ND
2018-02-14AE13747ND
2018-02-14AE13754ND
2018-02-14AE13745ND
2018-02-14AE13746ND
2018-05-29AE27851ND
2018-05-29AE27848ND
2018-05-29AE27855ND
2018-05-29AE27857ND
2018-07-24AE34441ND
2018-07-24AE34443ND
2018-07-24AE34447ND
2018-07-24AE34444ND
2018-10-25AE44612ND
2018-10-25AE44615ND
2018-10-25AE44614ND
2018-10-25AE44613ND
2019-01-17AE50510ND
2019-01-17AE505092.70 ppb
2019-01-17AE505142.10 ppb
2019-01-17AE50511ND
2019-04-08AE61377ND
2019-04-08AE61379ND
2019-04-08AE61376ND
2019-04-08AE61381ND
2019-07-25AE75967ND
2019-07-25AE75964ND
2019-07-25AE75966ND
2019-07-25AE75965ND
2019-11-21AE90156ND
2019-11-21AE90158ND
2019-11-21AE901553.00 ppb
2019-11-21AE90157ND