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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

City of Pittsburg

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

78

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.829 ppb1615ND - 1.20 ppb
20150.711 ppb1615ND - 1.20 ppb
20160.547 ppb1610ND - 2.00 ppb
20170.946 ppb16160.500 ppb - 2.80 ppb
20180.798 ppb1613ND - 1.70 ppb
20190.392 ppb169ND - 1.40 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
2014-02-18640501.10 ppb
2014-02-18640480.890 ppb
2014-02-18640460.570 ppb
2014-02-18640440.700 ppb
2014-05-051106510.620 ppb
2014-05-051106500.880 ppb
2014-05-051106491.20 ppb
2014-05-051106481.000 ppb
2014-08-181759591.10 ppb
2014-08-181759580.860 ppb
2014-08-181759601.20 ppb
2014-08-181759611.10 ppb
2014-11-172329630.830 ppb
2014-11-17232962ND
2014-11-172329610.600 ppb
2014-11-172329590.620 ppb
2015-02-162801670.580 ppb
2015-02-162801660.530 ppb
2015-02-162801650.580 ppb
2015-02-162801640.610 ppb
2015-05-183356780.730 ppb
2015-05-183356790.630 ppb
2015-05-183356810.970 ppb
2015-05-183356801.20 ppb
2015-08-173895860.720 ppb
2015-08-173895850.520 ppb
2015-08-173895840.830 ppb
2015-08-173895830.740 ppb
2015-11-304281690.790 ppb
2015-11-304281681.10 ppb
2015-11-304281670.850 ppb
2015-11-30428166ND
2016-02-08490888ND
2016-02-08490887ND
2016-02-08490889ND
2016-02-08490890ND
2016-05-315548800.550 ppb
2016-05-315548790.570 ppb
2016-05-315548780.800 ppb
2016-05-315548770.710 ppb
2016-08-226086960.640 ppb
2016-08-226086950.810 ppb
2016-08-226086940.890 ppb
2016-08-226086930.780 ppb
2016-11-14660742ND
2016-11-146607452.00 ppb
2016-11-14660744ND
2016-11-146607431.000 ppb
2017-02-207118190.500 ppb
2017-02-207118180.620 ppb
2017-02-207118170.500 ppb
2017-02-207118160.730 ppb
2017-05-307690431.000 ppb
2017-05-307690421.10 ppb
2017-05-307690411.10 ppb
2017-05-307690401.80 ppb
2017-08-228248890.590 ppb
2017-08-228248882.80 ppb
2017-08-228248900.870 ppb
2017-08-228248910.720 ppb
2017-11-148789820.570 ppb
2017-11-148789811.10 ppb
2017-11-148789800.560 ppb
2017-11-148789790.580 ppb
2018-02-209085630.930 ppb
2018-02-209085620.890 ppb
2018-02-209085610.760 ppb
2018-02-209085600.920 ppb
2018-05-229747881.10 ppb
2018-05-229747891.60 ppb
2018-05-229747910.680 ppb
2018-05-22974790ND
2018-08-2110301051.70 ppb
2018-08-2110301041.10 ppb
2018-08-2110301030.700 ppb
2018-08-211030102ND
2018-11-0610746051.30 ppb
2018-11-0610746040.580 ppb
2018-11-0610746030.500 ppb
2018-11-061074602ND
2019-02-1211210200.510 ppb
2019-02-121121019ND
2019-02-121121021ND
2019-02-121121022ND
2019-05-1411579970.500 ppb
2019-05-1411579960.670 ppb
2019-05-1411579950.720 ppb
2019-05-1411579941.40 ppb
2019-08-1312235790.540 ppb
2019-08-1312235780.720 ppb
2019-08-131223577ND
2019-08-131223576ND
2019-11-1812775560.590 ppb
2019-11-1812775590.620 ppb
2019-11-181277558ND
2019-11-181277557ND