Dichloroacetic acid
City of Columbia
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 |
---|---|---|---|---|
2014 | 20.2 ppb | 32 | 32 | 8.89 ppb - 32.8 ppb |
2015 | 22.5 ppb | 32 | 29 | ND - 40.4 ppb |
2016 | 20.6 ppb | 40 | 39 | ND - 31.5 ppb |
2017 | 22.3 ppb | 48 | 48 | 1.38 ppb - 42.5 ppb |
2018 | 13.6 ppb | 48 | 48 | 6.37 ppb - 33.6 ppb |
2019 | 14.8 ppb | 48 | 48 | 4.91 ppb - 23.3 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 |
---|---|---|
2014-01-14 | 2140115-1 | 16.5 ppb |
2014-01-14 | 2140115-2 | 17.2 ppb |
2014-01-15 | 2140116-2 | 16.7 ppb |
2014-01-15 | 2140116-3 | 30.1 ppb |
2014-01-15 | 2140116-4 | 32.8 ppb |
2014-01-15 | 2140116-5 | 26.2 ppb |
2014-01-15 | 2140116-6 | 16.9 ppb |
2014-01-15 | 2140116-7 | 16.9 ppb |
2014-04-07 | 2140408-2 | 23.2 ppb |
2014-04-07 | 2140408-3 | 13.9 ppb |
2014-04-07 | 2140408-4 | 15.2 ppb |
2014-04-07 | 2140408-5 | 14.0 ppb |
2014-04-07 | 2140408-6 | 21.3 ppb |
2014-04-07 | 2140408-7 | 20.3 ppb |
2014-04-09 | 2140410-1 | 24.2 ppb |
2014-04-09 | 2140410-2 | 20.7 ppb |
2014-07-07 | 2140708-2 | 23.9 ppb |
2014-07-07 | 2140708-3 | 16.7 ppb |
2014-07-07 | 2140708-4 | 14.1 ppb |
2014-07-07 | 2140708-5 | 17.0 ppb |
2014-07-07 | 2140708-6 | 25.5 ppb |
2014-07-07 | 2140708-7 | 25.6 ppb |
2014-07-07 | 2140708-8 | 25.3 ppb |
2014-07-07 | 2140708-9 | 27.5 ppb |
2014-10-13 | 2141014-14 | 23.0 ppb |
2014-10-13 | 2141014-15 | 9.88 ppb |
2014-10-13 | 2141014-16 | 8.89 ppb |
2014-10-13 | 2141014-17 | 13.4 ppb |
2014-10-13 | 2141014-18 | 24.7 ppb |
2014-10-13 | 2141014-19 | 20.4 ppb |
2014-10-13 | 2141014-20 | 21.5 ppb |
2014-10-13 | 2141014-21 | 22.9 ppb |
2015-01-12 | 2150113-2 | 19.8 ppb |
2015-01-12 | 2150113-3 | 24.6 ppb |
2015-01-12 | 2150113-4 | 19.7 ppb |
2015-01-12 | 2150113-5 | 23.3 ppb |
2015-01-12 | 2150113-6 | 19.8 ppb |
2015-01-12 | 2150113-7 | 17.4 ppb |
2015-01-12 | 2150113-8 | 18.8 ppb |
2015-01-12 | 2150113-9 | 21.2 ppb |
2015-04-06 | 2150408-10 | 37.1 ppb |
2015-04-06 | 2150408-11 | 21.4 ppb |
2015-04-06 | 2150408-12 | 21.6 ppb |
2015-04-06 | 2150408-13 | 20.2 ppb |
2015-04-06 | 2150408-14 | 27.9 ppb |
2015-04-06 | 2150408-15 | 18.5 ppb |
2015-04-06 | 2150408-16 | 11.7 ppb |
2015-04-06 | 2150408-17 | 34.9 ppb |
2015-07-13 | 2150717-44 | 34.0 ppb |
2015-07-13 | 2150717-45 | 9.34 ppb |
2015-07-13 | 2150717-46 | 17.5 ppb |
2015-07-13 | 2150717-47 | 22.0 ppb |
2015-07-13 | 2150717-48 | 33.3 ppb |
2015-07-13 | 2150717-49 | 36.9 ppb |
2015-07-13 | 2150717-50 | 31.4 ppb |
2015-07-13 | 2150717-51 | 30.0 ppb |
2015-11-09 | 2151116-2 | 27.8 ppb |
2015-11-09 | 2151116-3 | ND |
2015-11-09 | 2151116-4 | 40.4 ppb |
2015-11-09 | 2151116-5 | ND |
2015-11-09 | 2151116-6 | ND |
2015-11-09 | 2151116-7 | 24.1 ppb |
2015-11-09 | 2151116-8 | 24.1 ppb |
2015-11-09 | 2151116-9 | 32.2 ppb |
2016-01-11 | 2160114-03 | 23.8 ppb |
2016-01-11 | 2160114-05 | 10.7 ppb |
2016-01-11 | 2160114-06 | 19.5 ppb |
2016-01-11 | 2160114-04 | 22.2 ppb |
2016-01-11 | 2160114-02 | 18.9 ppb |
2016-01-12 | 2160114-07 | 19.5 ppb |
2016-01-12 | 2160114-08 | 23.1 ppb |
2016-01-13 | 2160114-09 | 26.2 ppb |
2016-04-12 | 2160413-3 | 21.0 ppb |
2016-04-12 | 2160413-5 | 21.3 ppb |
2016-04-12 | 2160413-6 | 26.5 ppb |
2016-04-12 | 2160413-4 | 20.6 ppb |
2016-04-12 | 2160413-9 | 27.8 ppb |
2016-04-12 | 2160413-2 | 24.0 ppb |
2016-04-12 | 2160413-7 | 28.7 ppb |
2016-04-12 | 2160413-8 | 27.7 ppb |
2016-08-24 | 2160826-13 | 14.4 ppb |
2016-08-24 | 2160826-03 | 12.9 ppb |
2016-08-24 | 2160826-05 | 17.7 ppb |
2016-08-24 | 2160826-06 | 22.1 ppb |
2016-08-24 | 2160826-10 | 16.6 ppb |
2016-08-24 | 2160826-11 | 25.4 ppb |
2016-08-24 | 2160826-12 | 16.0 ppb |
2016-08-24 | 2160826-04 | 15.6 ppb |
2016-08-24 | 2160826-09 | 2.38 ppb |
2016-08-24 | 2160826-02 | 21.0 ppb |
2016-08-24 | 2160826-07 | 20.6 ppb |
2016-08-24 | 2160826-08 | 23.2 ppb |
2016-10-11 | 2161014-13 | 31.4 ppb |
2016-10-11 | 2161014-03 | 31.5 ppb |
2016-10-11 | 2161014-05 | 17.0 ppb |
2016-10-11 | 2161014-06 | 22.9 ppb |
2016-10-11 | 2161014-10 | 27.7 ppb |
2016-10-11 | 2161014-11 | 19.4 ppb |
2016-10-11 | 2161014-12 | 28.9 ppb |
2016-10-11 | 2161014-04 | 30.9 ppb |
2016-10-11 | 2161014-09 | 2.40 ppb |
2016-10-11 | 2161014-02 | 20.6 ppb |
2016-10-11 | 2161014-07 | 22.4 ppb |
2016-10-11 | 2161014-08 | ND |
2017-01-11 | 2170113-13 | 1.38 ppb |
2017-01-11 | 2170113-03 | 32.0 ppb |
2017-01-11 | 2170113-05 | 28.9 ppb |
2017-01-11 | 2170113-06 | 18.9 ppb |
2017-01-11 | 2170113-10 | 32.6 ppb |
2017-01-11 | 2170113-11 | 21.9 ppb |
2017-01-11 | 2170113-12 | 1.70 ppb |
2017-01-11 | 2170113-04 | 31.1 ppb |
2017-01-11 | 2170113-09 | 19.4 ppb |
2017-01-11 | 2170113-02 | 19.9 ppb |
2017-01-11 | 2170113-07 | 15.6 ppb |
2017-01-11 | 2170113-08 | 18.0 ppb |
2017-04-10 | 2170414-20 | 36.4 ppb |
2017-04-10 | 2170414-21 | 35.0 ppb |
2017-04-10 | 2170414-22 | 42.5 ppb |
2017-04-10 | 2170414-23 | 19.2 ppb |
2017-04-10 | 2170414-24 | 41.0 ppb |
2017-04-10 | 2170414-27 | 41.4 ppb |
2017-04-10 | 2170414-28 | 20.0 ppb |
2017-04-10 | 2170414-29 | 19.6 ppb |
2017-04-10 | 2170414-30 | 16.5 ppb |
2017-04-10 | 2170414-31 | 21.1 ppb |
2017-05-25 | 2170526-14 | 17.3 ppb |
2017-05-25 | 2170526-15 | 22.4 ppb |
2017-07-10 | 2170714-19 | 25.2 ppb |
2017-07-11 | 2170714-16 | 30.0 ppb |
2017-07-11 | 2170714-17 | 29.9 ppb |
2017-07-11 | 2170714-18 | 25.0 ppb |
2017-07-11 | 2170714-20 | 33.4 ppb |
2017-07-11 | 2170714-21 | 23.4 ppb |
2017-07-11 | 2170714-22 | 36.4 ppb |
2017-07-12 | 2170714-23 | 22.2 ppb |
2017-07-12 | 2170714-24 | 23.0 ppb |
2017-07-12 | 2170714-25 | 24.4 ppb |
2017-07-12 | 2170714-26 | 24.6 ppb |
2017-07-12 | 2170714-27 | 24.8 ppb |
2017-10-09 | 2171012-05 | 13.2 ppb |
2017-10-09 | 2171012-13 | 12.3 ppb |
2017-10-10 | 2171012-02 | 6.81 ppb |
2017-10-10 | 2171012-03 | 18.6 ppb |
2017-10-10 | 2171012-04 | 7.74 ppb |
2017-10-10 | 2171012-06 | 15.8 ppb |
2017-10-10 | 2171012-07 | 13.6 ppb |
2017-10-10 | 2171012-08 | 21.3 ppb |
2017-10-11 | 2171012-09 | 21.0 ppb |
2017-10-11 | 2171012-10 | 12.5 ppb |
2017-10-11 | 2171012-11 | 15.0 ppb |
2017-10-11 | 2171012-12 | 14.5 ppb |
2018-01-09 | 2180112-20 | 11.8 ppb |
2018-01-09 | 2180112-22 | 10.5 ppb |
2018-01-09 | 2180112-23 | 10.1 ppb |
2018-01-09 | 2180112-24 | 9.09 ppb |
2018-01-09 | 2180112-25 | 8.51 ppb |
2018-01-09 | 2180112-26 | 9.20 ppb |
2018-01-09 | 2180112-28 | 10.7 ppb |
2018-01-09 | 2180112-31 | 11.2 ppb |
2018-01-09 | 2180112-27 | 10.2 ppb |
2018-01-09 | 2180112-30 | 10.2 ppb |
2018-01-10 | 2180112-29 | 9.64 ppb |
2018-01-11 | 2180112-21 | 15.9 ppb |
2018-04-09 | 2180413-05 | 9.21 ppb |
2018-04-09 | 2180413-06 | 9.12 ppb |
2018-04-09 | 2180413-07 | 8.83 ppb |
2018-04-09 | 2180413-13 | 10.5 ppb |
2018-04-11 | 2180413-02 | 14.2 ppb |
2018-04-11 | 2180413-03 | 13.5 ppb |
2018-04-11 | 2180413-04 | 12.4 ppb |
2018-04-11 | 2180413-09 | 15.4 ppb |
2018-04-11 | 2180413-10 | 15.8 ppb |
2018-04-11 | 2180413-12 | 12.4 ppb |
2018-04-12 | 2180413-08 | 10.2 ppb |
2018-04-12 | 2180413-11 | 8.70 ppb |
2018-07-09 | 2180711-05 | 33.6 ppb |
2018-07-09 | 2180711-06 | 20.6 ppb |
2018-07-09 | 2180711-07 | 27.7 ppb |
2018-07-09 | 2180711-08 | 19.8 ppb |
2018-07-09 | 2180711-09 | 21.1 ppb |
2018-07-09 | 2180711-12 | 17.6 ppb |
2018-07-09 | 2180711-13 | 17.2 ppb |
2018-07-09 | 2180711-14 | 17.5 ppb |
2018-07-10 | 2180711-03 | 18.0 ppb |
2018-07-10 | 2180711-04 | 30.1 ppb |
2018-07-10 | 2180711-10 | 24.0 ppb |
2018-07-10 | 2180711-11 | 27.5 ppb |
2018-10-08 | 2181009-03 | 11.5 ppb |
2018-10-08 | 2181009-04 | 10.2 ppb |
2018-10-08 | 2181009-05 | 11.4 ppb |
2018-10-08 | 2181009-06 | 7.71 ppb |
2018-10-08 | 2181009-07 | 7.27 ppb |
2018-10-08 | 2181009-08 | 6.37 ppb |
2018-10-08 | 2181009-09 | 7.08 ppb |
2018-10-08 | 2181009-10 | 13.3 ppb |
2018-10-08 | 2181009-11 | 12.6 ppb |
2018-10-08 | 2181009-12 | 6.64 ppb |
2018-10-08 | 2181009-13 | 9.72 ppb |
2018-10-08 | 2181009-14 | 8.14 ppb |
2019-01-07 | 2190109-04 | 22.0 ppb |
2019-01-07 | 2190109-05 | 10.5 ppb |
2019-01-07 | 2190109-06 | 8.32 ppb |
2019-01-07 | 2190109-07 | 8.22 ppb |
2019-01-07 | 2190109-16 | 9.39 ppb |
2019-01-07 | 2190109-19 | 8.38 ppb |
2019-01-07 | 2190109-20 | 20.5 ppb |
2019-01-07 | 2190109-21 | 13.5 ppb |
2019-01-08 | 2190109-02 | 23.3 ppb |
2019-01-08 | 2190109-03 | 21.9 ppb |
2019-01-08 | 2190109-17 | 22.8 ppb |
2019-01-08 | 2190109-18 | 22.5 ppb |
2019-04-08 | 2190410-03 | 19.6 ppb |
2019-04-08 | 2190410-04 | 20.7 ppb |
2019-04-08 | 2190410-05 | 20.9 ppb |
2019-04-08 | 2190410-06 | 15.4 ppb |
2019-04-08 | 2190410-07 | 17.4 ppb |
2019-04-08 | 2190410-08 | 13.8 ppb |
2019-04-08 | 2190410-09 | 14.1 ppb |
2019-04-08 | 2190410-10 | 19.0 ppb |
2019-04-08 | 2190410-11 | 18.1 ppb |
2019-04-08 | 2190410-12 | 14.0 ppb |
2019-04-08 | 2190410-13 | 19.2 ppb |
2019-04-08 | 2190410-14 | 15.0 ppb |
2019-07-11 | 2190712-02 | 15.7 ppb |
2019-07-11 | 2190712-03 | 19.0 ppb |
2019-07-11 | 2190712-04 | 20.8 ppb |
2019-07-11 | 2190712-05 | 11.5 ppb |
2019-07-11 | 2190712-06 | 13.2 ppb |
2019-07-11 | 2190712-07 | 10.7 ppb |
2019-07-11 | 2190712-16 | 11.3 ppb |
2019-07-11 | 2190712-17 | 16.7 ppb |
2019-07-11 | 2190712-18 | 20.0 ppb |
2019-07-11 | 2190712-19 | 13.2 ppb |
2019-07-11 | 2190712-20 | 19.8 ppb |
2019-07-11 | 2190712-21 | 15.6 ppb |
2019-10-14 | 2191016-02 | 14.8 ppb |
2019-10-14 | 2191016-03 | 12.9 ppb |
2019-10-14 | 2191016-04 | 11.0 ppb |
2019-10-14 | 2191016-05 | 13.8 ppb |
2019-10-14 | 2191016-06 | 19.5 ppb |
2019-10-14 | 2191016-07 | 13.5 ppb |
2019-10-16 | 2191018-02 | 8.89 ppb |
2019-10-16 | 2191018-03 | 6.69 ppb |
2019-10-16 | 2191018-04 | 4.91 ppb |
2019-10-16 | 2191018-05 | 5.50 ppb |
2019-10-16 | 2191018-06 | 8.23 ppb |
2019-10-16 | 2191018-07 | 6.88 ppb |