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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 0.829 ppb | 16 | 15 | ND - 1.20 ppb |
2015 | 0.711 ppb | 16 | 15 | ND - 1.20 ppb |
2016 | 0.547 ppb | 16 | 10 | ND - 2.00 ppb |
2017 | 0.946 ppb | 16 | 16 | 0.500 ppb - 2.80 ppb |
2018 | 0.798 ppb | 16 | 13 | ND - 1.70 ppb |
2019 | 0.392 ppb | 16 | 9 | ND - 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 |
---|---|---|
2014-02-18 | 64050 | 1.10 ppb |
2014-02-18 | 64048 | 0.890 ppb |
2014-02-18 | 64046 | 0.570 ppb |
2014-02-18 | 64044 | 0.700 ppb |
2014-05-05 | 110651 | 0.620 ppb |
2014-05-05 | 110650 | 0.880 ppb |
2014-05-05 | 110649 | 1.20 ppb |
2014-05-05 | 110648 | 1.000 ppb |
2014-08-18 | 175959 | 1.10 ppb |
2014-08-18 | 175958 | 0.860 ppb |
2014-08-18 | 175960 | 1.20 ppb |
2014-08-18 | 175961 | 1.10 ppb |
2014-11-17 | 232963 | 0.830 ppb |
2014-11-17 | 232962 | ND |
2014-11-17 | 232961 | 0.600 ppb |
2014-11-17 | 232959 | 0.620 ppb |
2015-02-16 | 280167 | 0.580 ppb |
2015-02-16 | 280166 | 0.530 ppb |
2015-02-16 | 280165 | 0.580 ppb |
2015-02-16 | 280164 | 0.610 ppb |
2015-05-18 | 335678 | 0.730 ppb |
2015-05-18 | 335679 | 0.630 ppb |
2015-05-18 | 335681 | 0.970 ppb |
2015-05-18 | 335680 | 1.20 ppb |
2015-08-17 | 389586 | 0.720 ppb |
2015-08-17 | 389585 | 0.520 ppb |
2015-08-17 | 389584 | 0.830 ppb |
2015-08-17 | 389583 | 0.740 ppb |
2015-11-30 | 428169 | 0.790 ppb |
2015-11-30 | 428168 | 1.10 ppb |
2015-11-30 | 428167 | 0.850 ppb |
2015-11-30 | 428166 | ND |
2016-02-08 | 490888 | ND |
2016-02-08 | 490887 | ND |
2016-02-08 | 490889 | ND |
2016-02-08 | 490890 | ND |
2016-05-31 | 554880 | 0.550 ppb |
2016-05-31 | 554879 | 0.570 ppb |
2016-05-31 | 554878 | 0.800 ppb |
2016-05-31 | 554877 | 0.710 ppb |
2016-08-22 | 608696 | 0.640 ppb |
2016-08-22 | 608695 | 0.810 ppb |
2016-08-22 | 608694 | 0.890 ppb |
2016-08-22 | 608693 | 0.780 ppb |
2016-11-14 | 660742 | ND |
2016-11-14 | 660745 | 2.00 ppb |
2016-11-14 | 660744 | ND |
2016-11-14 | 660743 | 1.000 ppb |
2017-02-20 | 711819 | 0.500 ppb |
2017-02-20 | 711818 | 0.620 ppb |
2017-02-20 | 711817 | 0.500 ppb |
2017-02-20 | 711816 | 0.730 ppb |
2017-05-30 | 769043 | 1.000 ppb |
2017-05-30 | 769042 | 1.10 ppb |
2017-05-30 | 769041 | 1.10 ppb |
2017-05-30 | 769040 | 1.80 ppb |
2017-08-22 | 824889 | 0.590 ppb |
2017-08-22 | 824888 | 2.80 ppb |
2017-08-22 | 824890 | 0.870 ppb |
2017-08-22 | 824891 | 0.720 ppb |
2017-11-14 | 878982 | 0.570 ppb |
2017-11-14 | 878981 | 1.10 ppb |
2017-11-14 | 878980 | 0.560 ppb |
2017-11-14 | 878979 | 0.580 ppb |
2018-02-20 | 908563 | 0.930 ppb |
2018-02-20 | 908562 | 0.890 ppb |
2018-02-20 | 908561 | 0.760 ppb |
2018-02-20 | 908560 | 0.920 ppb |
2018-05-22 | 974788 | 1.10 ppb |
2018-05-22 | 974789 | 1.60 ppb |
2018-05-22 | 974791 | 0.680 ppb |
2018-05-22 | 974790 | ND |
2018-08-21 | 1030105 | 1.70 ppb |
2018-08-21 | 1030104 | 1.10 ppb |
2018-08-21 | 1030103 | 0.700 ppb |
2018-08-21 | 1030102 | ND |
2018-11-06 | 1074605 | 1.30 ppb |
2018-11-06 | 1074604 | 0.580 ppb |
2018-11-06 | 1074603 | 0.500 ppb |
2018-11-06 | 1074602 | ND |
2019-02-12 | 1121020 | 0.510 ppb |
2019-02-12 | 1121019 | ND |
2019-02-12 | 1121021 | ND |
2019-02-12 | 1121022 | ND |
2019-05-14 | 1157997 | 0.500 ppb |
2019-05-14 | 1157996 | 0.670 ppb |
2019-05-14 | 1157995 | 0.720 ppb |
2019-05-14 | 1157994 | 1.40 ppb |
2019-08-13 | 1223579 | 0.540 ppb |
2019-08-13 | 1223578 | 0.720 ppb |
2019-08-13 | 1223577 | ND |
2019-08-13 | 1223576 | ND |
2019-11-18 | 1277556 | 0.590 ppb |
2019-11-18 | 1277559 | 0.620 ppb |
2019-11-18 | 1277558 | ND |
2019-11-18 | 1277557 | ND |