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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Aqua Pa Hatboro

Dichloroacetic 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

 

49

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
20173.69 ppb1612ND - 17.6 ppb
20182.17 ppb175ND - 12.7 ppb
20191.18 ppb165ND - 5.60 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2017-01-11155161841.50 ppb
2017-01-11155161483.60 ppb
2017-01-11155161605.20 ppb
2017-01-11155161721.70 ppb
2017-04-12159361193.90 ppb
2017-04-12159361551.40 ppb
2017-04-1215936131ND
2017-04-1215936143ND
2017-08-10165647776.20 ppb
2017-08-1016564789ND
2017-08-1016564795ND
2017-08-101656478317.6 ppb
2017-10-11168793542.80 ppb
2017-10-111687936611.3 ppb
2017-10-11168793421.90 ppb
2017-10-11168793302.00 ppb
2018-01-03AF72704ND
2018-01-03AF72703ND
2018-01-03AF72702ND
2018-01-03AF72701ND
2018-04-04AF80402ND
2018-04-04AF804007.30 ppb
2018-04-04AF80403ND
2018-04-04AF8040112.7 ppb
2018-04-25AF8224110.1 ppb
2018-07-31AF91164ND
2018-07-31AF91166ND
2018-07-31AF911655.80 ppb
2018-07-31AF91167ND
2018-10-03AF97189ND
2018-10-03AF97188ND
2018-10-03AF971861.000 ppb
2018-10-03AF97187ND
2019-01-02AG05087ND
2019-01-02AG05085ND
2019-01-02AG050845.60 ppb
2019-01-02AG05086ND
2019-04-03AG13098ND
2019-04-03AG130952.00 ppb
2019-04-03AG13096ND
2019-04-03AG13097ND
2019-07-03AG22506ND
2019-07-03AG22507ND
2019-07-03AG225155.10 ppb
2019-07-03AG22508ND
2019-10-02AG34367ND
2019-10-02AG343664.60 ppb
2019-10-02AG34368ND
2019-10-02AG343651.60 ppb