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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Herndon

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
20150.153 ppb161ND - 2.45 ppb
2016ND160ND
2017ND160ND
20180.134 ppb161ND - 2.14 ppb
20190.293 ppb162ND - 2.46 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
2014-02-11FW14012205-04_HAND
2014-02-11FW14012205-01_HAND
2014-02-11FW14012205-02_HAND
2014-02-11FW14012205-03_HAND
2014-05-06FW14050105-01_HAND
2014-05-06FW14050105-02_HAND
2014-05-06FW14050105-04_HAND
2014-05-06FW14050105-03_HAND
2014-08-12FW14072408-03_HAND
2014-08-12FW14072408-02_HAND
2014-08-12FW14072408-01_HAND
2014-08-12FW14072408-04_HAND
2014-11-12FW141016008-01_HND
2014-11-12FW141016008-04_HND
2014-11-12FW141016008-03_HND
2014-11-12FW141016008-02_HND
2015-02-1000125-FAIRFAX COND
2015-02-1000125-FAIRFAX COND
2015-02-1000125-FAIRFAX COND
2015-02-1000125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-08-1100125-FAIRFAX COND
2015-08-1100125-FAIRFAX COND
2015-08-1100125-FAIRFAX COND
2015-08-1100125-FAIRFAX CO2.45 ppb
2015-11-1000125-FAIRFAX COND
2015-11-1000125-FAIRFAX COND
2015-11-1000125-FAIRFAX COND
2015-11-1000125-FAIRFAX COND
2016-02-09FW160121029-01_HND
2016-02-09FW160121029-02_HND
2016-02-09FW160121029-03_HND
2016-02-09FW160121029-04_HND
2016-05-11FW160422006-03_HND
2016-05-11FW160422006-04_HND
2016-05-11FW160422006-02_HND
2016-05-11FW160422006-01_HND
2016-08-09FW160718007-01_HND
2016-08-09FW160718007-02_HND
2016-08-09FW160718007-03_HND
2016-08-09FW160718007-04_HND
2016-11-08FW161013010-01_HND
2016-11-08FW161013010-02_HND
2016-11-08FW161013010-03_HND
2016-11-08FW161013010-04_HND
2017-02-07FW161018085-04_HND
2017-02-07FW161018085-01_HND
2017-02-07FW161018085-02_HND
2017-02-07FW161018085-03_HND
2017-05-09FW170414004-01_HND
2017-05-09FW170414004-02_HND
2017-05-09FW170414004-03_HND
2017-05-09FW170414004-04_HND
2017-08-08FW170629005-04_HND
2017-08-08FW170629005-03_HND
2017-08-08FW170629005-02_HND
2017-08-08FW170629005-01_HND
2017-11-07FW171013004-01_HND
2017-11-07FW171013004-02_HND
2017-11-07FW171013004-03_HND
2017-11-07FW171013004-04_HND
2018-02-06FW180111003-04_HND
2018-02-06FW180111003-03_HND
2018-02-06FW180111003-02_HND
2018-02-06FW180111003-01_HND
2018-05-08FW180419004-04_HND
2018-05-08FW180419004-01_H2.14 ppb
2018-05-08FW180419004-02_HND
2018-05-08FW180419004-03_HND
2018-08-07FW180716033-04_HND
2018-08-07FW180716033-03_HND
2018-08-07FW180716033-02_HND
2018-08-07FW180716033-01_HND
2018-11-07FW181023105-01_HND
2018-11-07FW181023105-02_HND
2018-11-07FW181023105-03_HND
2018-11-07FW181023105-04_HND
2019-02-12FW190114010-01_HND
2019-02-12FW190114010-02_HND
2019-02-12FW190114010-03_HND
2019-02-12FW190114010-04_HND
2019-05-07FW190422009-01_HND
2019-05-07FW190422009-04_H2.22 ppb
2019-05-07FW190422009-03_HND
2019-05-07FW190422009-02_H2.46 ppb
2019-08-08FW190726005-02_HND
2019-08-08FW190726005-04_HND
2019-08-08FW190726005-03_HND
2019-08-08FW190726005-01_HND
2019-11-12FW191027005-04_HND
2019-11-12FW191027005-03_HND
2019-11-12FW191027005-02_HND
2019-11-12FW191027005-01_HND