Dichloroacetic acid
Bcwsa Main Lower South
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 8.29 ppb | 16 | 12 | ND - 31.0 ppb |
| 2019 | 7.91 ppb | 32 | 32 | 2.00 ppb - 18.0 ppb |
| 2020 | 9.52 ppb | 65 | 65 | 1.17 ppb - 60.1 ppb |
| 2021 | 9.61 ppb | 95 | 95 | 1.61 ppb - 62.8 ppb |
| 2022 | 12.7 ppb | 96 | 95 | ND - 50.5 ppb |
| 2023 | 14.5 ppb | 96 | 95 | ND - 40.5 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.2 ppb
The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to reproduction and child development.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-08-13 | 8082937-01 | 13.7 ppb |
| 2018-08-13 | 8082937-02 | 17.0 ppb |
| 2018-08-13 | 8082937-03 | 2.04 ppb |
| 2018-08-13 | 8082937-04 | 11.9 ppb |
| 2018-08-13 | 8082937-05 | ND |
| 2018-08-13 | 8082937-06 | ND |
| 2018-08-13 | 8082937-07 | ND |
| 2018-08-13 | 8082937-08 | ND |
| 2018-11-12 | 8032032-01 | 10.00 ppb |
| 2018-11-14 | 8032034-01 | 15.0 ppb |
| 2018-11-14 | 8032035-01 | 5.00 ppb |
| 2018-11-14 | 8032036-01 | 7.00 ppb |
| 2018-11-14 | 8032037-01 | 31.0 ppb |
| 2018-11-14 | 8032038-01 | 5.00 ppb |
| 2018-11-14 | 8032039-01 | 7.00 ppb |
| 2018-11-15 | 8034181-01 | 8.00 ppb |
| 2019-02-13 | 9004485-01 | 7.00 ppb |
| 2019-02-13 | 9004486-01 | 14.0 ppb |
| 2019-02-13 | 9004487-01 | 14.0 ppb |
| 2019-02-14 | 9004483-01 | 7.00 ppb |
| 2019-02-14 | 9004484-01 | 9.00 ppb |
| 2019-02-14 | 9004488-01 | 12.0 ppb |
| 2019-02-14 | 9004489-01 | 11.0 ppb |
| 2019-02-15 | 9004482-01 | 6.00 ppb |
| 2019-05-13 | 9015730-01 | 5.00 ppb |
| 2019-05-13 | 9015731-01 | 5.00 ppb |
| 2019-05-13 | 9015732-01 | 5.00 ppb |
| 2019-05-13 | 9015733-01 | 6.00 ppb |
| 2019-05-13 | 9015734-01 | 14.0 ppb |
| 2019-05-13 | 9015735-01 | 17.0 ppb |
| 2019-05-13 | 9015736-01 | 9.00 ppb |
| 2019-05-13 | 9015737-01 | 11.0 ppb |
| 2019-08-12 | 9028010-01 | 5.00 ppb |
| 2019-08-12 | 9028011-01 | 5.00 ppb |
| 2019-08-12 | 9028012-01 | 5.00 ppb |
| 2019-08-12 | 9028013-01 | 6.00 ppb |
| 2019-08-12 | 9028014-01 | 5.00 ppb |
| 2019-08-12 | 9028015-01 | 18.0 ppb |
| 2019-08-12 | 9028016-01 | 2.00 ppb |
| 2019-08-12 | 9028017-01 | 3.00 ppb |
| 2019-11-11 | 9112242-01 | 4.34 ppb |
| 2019-11-11 | 9112242-02 | 4.46 ppb |
| 2019-11-11 | 9112242-03 | 3.81 ppb |
| 2019-11-11 | 9112242-04 | 7.02 ppb |
| 2019-11-11 | 9112242-05 | 4.66 ppb |
| 2019-11-11 | 9112242-06 | 16.8 ppb |
| 2019-11-11 | 9112242-07 | 3.33 ppb |
| 2019-11-11 | 9112242-08 | 7.76 ppb |
| 2020-02-12 | 4.68 ppb | |
| 2020-02-12 | 4.48 ppb | |
| 2020-02-12 | 5.98 ppb | |
| 2020-02-12 | 5.84 ppb | |
| 2020-02-12 | 10.7 ppb | |
| 2020-02-12 | 10.7 ppb | |
| 2020-02-12 | 9.18 ppb | |
| 2020-02-12 | 8.45 ppb | |
| 2020-05-13 | 3.96 ppb | |
| 2020-05-13 | 4.04 ppb | |
| 2020-05-13 | 1.42 ppb | |
| 2020-05-13 | 7.31 ppb | |
| 2020-05-13 | 8.27 ppb | |
| 2020-05-13 | 11.0 ppb | |
| 2020-05-13 | 12.2 ppb | |
| 2020-05-13 | 11.9 ppb | |
| 2020-08-14 | 6.54 ppb | |
| 2020-08-14 | 6.19 ppb | |
| 2020-08-14 | 1.53 ppb | |
| 2020-08-14 | 5.62 ppb | |
| 2020-08-14 | 3.47 ppb | |
| 2020-08-14 | 60.1 ppb | |
| 2020-08-14 | 3.87 ppb | |
| 2020-08-14 | 58.8 ppb | |
| 2020-09-04 | 25.3 ppb | |
| 2020-09-08 | 24.5 ppb | |
| 2020-09-11 | 31.8 ppb | |
| 2020-09-15 | 27.3 ppb | |
| 2020-09-15 | 10.1 ppb | |
| 2020-09-18 | 3.63 ppb | |
| 2020-09-18 | 4.36 ppb | |
| 2020-09-18 | 3.80 ppb | |
| 2020-09-18 | 4.44 ppb | |
| 2020-09-18 | 1.68 ppb | |
| 2020-09-18 | 16.4 ppb | |
| 2020-09-18 | 1.17 ppb | |
| 2020-09-18 | 13.4 ppb | |
| 2020-09-22 | 12.9 ppb | |
| 2020-09-22 | 13.4 ppb | |
| 2020-09-29 | 4.45 ppb | |
| 2020-09-29 | 4.71 ppb | |
| 2020-10-14 | 2.43 ppb | |
| 2020-10-14 | 2.69 ppb | |
| 2020-10-14 | 2.52 ppb | |
| 2020-10-14 | 2.77 ppb | |
| 2020-10-14 | 1.28 ppb | |
| 2020-10-14 | 8.76 ppb | |
| 2020-10-14 | 1.27 ppb | |
| 2020-10-14 | 4.25 ppb | |
| 2020-11-13 | 8.84 ppb | |
| 2020-11-13 | 8.64 ppb | |
| 2020-11-13 | 8.60 ppb | |
| 2020-11-13 | 7.95 ppb | |
| 2020-11-13 | 2.67 ppb | |
| 2020-11-13 | 15.4 ppb | |
| 2020-11-13 | 3.42 ppb | |
| 2020-11-13 | 15.4 ppb | |
| 2020-12-11 | 5.66 ppb | |
| 2020-12-11 | 5.53 ppb | |
| 2020-12-11 | 4.10 ppb | |
| 2020-12-11 | 5.76 ppb | |
| 2020-12-11 | 4.97 ppb | |
| 2020-12-11 | 13.7 ppb | |
| 2020-12-11 | 4.98 ppb | |
| 2020-12-11 | 7.36 ppb | |
| 2021-01-15 | 4.65 ppb | |
| 2021-01-15 | 5.28 ppb | |
| 2021-01-15 | 5.38 ppb | |
| 2021-01-15 | 6.34 ppb | |
| 2021-01-15 | 11.8 ppb | |
| 2021-01-15 | 8.81 ppb | |
| 2021-01-15 | 10.5 ppb | |
| 2021-02-12 | 4.04 ppb | |
| 2021-02-12 | 4.25 ppb | |
| 2021-02-12 | 4.85 ppb | |
| 2021-02-12 | 4.35 ppb | |
| 2021-02-12 | 9.63 ppb | |
| 2021-02-12 | 10.5 ppb | |
| 2021-02-12 | 7.93 ppb | |
| 2021-02-12 | 12.0 ppb | |
| 2021-03-11 | 4.49 ppb | |
| 2021-03-11 | 5.93 ppb | |
| 2021-03-11 | 4.05 ppb | |
| 2021-03-11 | 4.63 ppb | |
| 2021-03-11 | 9.11 ppb | |
| 2021-03-11 | 9.77 ppb | |
| 2021-03-11 | 11.4 ppb | |
| 2021-03-11 | 11.2 ppb | |
| 2021-04-12 | 8.40 ppb | |
| 2021-04-12 | 5.20 ppb | |
| 2021-04-12 | 5.97 ppb | |
| 2021-04-12 | 13.7 ppb | |
| 2021-04-12 | 13.1 ppb | |
| 2021-04-12 | 11.5 ppb | |
| 2021-04-12 | 15.2 ppb | |
| 2021-04-16 | 5.23 ppb | |
| 2021-05-12 | 4.34 ppb | |
| 2021-05-12 | 4.55 ppb | |
| 2021-05-12 | 5.49 ppb | |
| 2021-05-12 | 5.67 ppb | |
| 2021-05-12 | 25.8 ppb | |
| 2021-05-12 | 21.0 ppb | |
| 2021-05-12 | 8.92 ppb | |
| 2021-05-12 | 14.7 ppb | |
| 2021-06-11 | 4.63 ppb | |
| 2021-06-11 | 3.98 ppb | |
| 2021-06-11 | 1.83 ppb | |
| 2021-06-11 | 6.17 ppb | |
| 2021-06-11 | 23.5 ppb | |
| 2021-06-11 | 23.5 ppb | |
| 2021-06-11 | 9.89 ppb | |
| 2021-06-11 | 23.2 ppb | |
| 2021-07-28 | 8.19 ppb | |
| 2021-07-28 | 6.64 ppb | |
| 2021-07-28 | 8.08 ppb | |
| 2021-07-28 | 6.71 ppb | |
| 2021-07-28 | 3.33 ppb | |
| 2021-07-28 | 34.6 ppb | |
| 2021-07-28 | 2.41 ppb | |
| 2021-07-28 | 28.8 ppb | |
| 2021-08-13 | 6.79 ppb | |
| 2021-08-13 | 4.17 ppb | |
| 2021-08-13 | 4.07 ppb | |
| 2021-08-13 | 5.45 ppb | |
| 2021-08-13 | 2.33 ppb | |
| 2021-08-13 | 28.4 ppb | |
| 2021-08-13 | 1.61 ppb | |
| 2021-08-13 | 24.2 ppb | |
| 2021-09-10 | 7.04 ppb | |
| 2021-09-10 | 9.79 ppb | |
| 2021-09-10 | 4.18 ppb | |
| 2021-09-10 | 5.73 ppb | |
| 2021-09-10 | 1.92 ppb | |
| 2021-09-10 | 62.8 ppb | |
| 2021-09-10 | 1.71 ppb | |
| 2021-09-10 | 5.94 ppb | |
| 2021-10-15 | 7.50 ppb | |
| 2021-10-15 | 9.79 ppb | |
| 2021-10-15 | 8.47 ppb | |
| 2021-10-15 | 1.64 ppb | |
| 2021-10-15 | 2.46 ppb | |
| 2021-10-15 | 34.1 ppb | |
| 2021-10-15 | 2.48 ppb | |
| 2021-10-15 | 30.4 ppb | |
| 2021-11-12 | 6.33 ppb | |
| 2021-11-12 | 7.20 ppb | |
| 2021-11-12 | 1.90 ppb | |
| 2021-11-12 | 5.72 ppb | |
| 2021-11-12 | 2.49 ppb | |
| 2021-11-12 | 17.6 ppb | |
| 2021-11-12 | 1.65 ppb | |
| 2021-11-12 | 14.3 ppb | |
| 2021-12-10 | 4.50 ppb | |
| 2021-12-10 | 4.56 ppb | |
| 2021-12-10 | 3.60 ppb | |
| 2021-12-10 | 5.05 ppb | |
| 2021-12-10 | 4.80 ppb | |
| 2021-12-10 | 11.1 ppb | |
| 2021-12-10 | 3.57 ppb | |
| 2021-12-10 | 10.2 ppb | |
| 2022-01-14 | 4.09 ppb | |
| 2022-01-14 | 3.86 ppb | |
| 2022-01-14 | 4.38 ppb | |
| 2022-01-14 | 5.73 ppb | |
| 2022-01-14 | 12.6 ppb | |
| 2022-01-14 | 13.8 ppb | |
| 2022-01-14 | 4.70 ppb | |
| 2022-01-14 | 6.72 ppb | |
| 2022-02-11 | 4.61 ppb | |
| 2022-02-11 | 4.66 ppb | |
| 2022-02-11 | 6.82 ppb | |
| 2022-02-11 | 7.05 ppb | |
| 2022-02-11 | 16.6 ppb | |
| 2022-02-11 | 16.1 ppb | |
| 2022-02-11 | 6.68 ppb | |
| 2022-02-11 | 14.9 ppb | |
| 2022-03-11 | 6.20 ppb | |
| 2022-03-11 | 5.80 ppb | |
| 2022-03-11 | 7.50 ppb | |
| 2022-03-11 | 7.10 ppb | |
| 2022-03-11 | 15.0 ppb | |
| 2022-03-11 | 14.0 ppb | |
| 2022-03-11 | 6.50 ppb | |
| 2022-03-11 | 15.0 ppb | |
| 2022-04-15 | 6.80 ppb | |
| 2022-04-15 | 7.10 ppb | |
| 2022-04-15 | ND | |
| 2022-04-15 | 8.30 ppb | |
| 2022-04-15 | 10.5 ppb | |
| 2022-04-15 | 14.2 ppb | |
| 2022-04-15 | 11.6 ppb | |
| 2022-04-15 | 22.4 ppb | |
| 2022-05-13 | 11.3 ppb | |
| 2022-05-13 | 11.4 ppb | |
| 2022-05-13 | 8.05 ppb | |
| 2022-05-13 | 13.6 ppb | |
| 2022-05-13 | 34.4 ppb | |
| 2022-05-13 | 18.0 ppb | |
| 2022-05-13 | 33.6 ppb | |
| 2022-06-07 | 6.52 ppb | |
| 2022-06-10 | 7.39 ppb | |
| 2022-06-10 | 14.1 ppb | |
| 2022-06-10 | 7.74 ppb | |
| 2022-06-10 | 4.44 ppb | |
| 2022-06-10 | 2.91 ppb | |
| 2022-06-10 | 44.5 ppb | |
| 2022-06-10 | 9.92 ppb | |
| 2022-06-10 | 49.9 ppb | |
| 2022-07-15 | 10.4 ppb | |
| 2022-07-15 | 13.4 ppb | |
| 2022-07-15 | 5.74 ppb | |
| 2022-07-15 | 5.67 ppb | |
| 2022-07-15 | 6.83 ppb | |
| 2022-07-15 | 23.9 ppb | |
| 2022-07-15 | 2.92 ppb | |
| 2022-07-15 | 24.9 ppb | |
| 2022-08-12 | 11.4 ppb | |
| 2022-08-12 | 14.4 ppb | |
| 2022-08-12 | 8.99 ppb | |
| 2022-08-12 | 9.01 ppb | |
| 2022-08-12 | 13.1 ppb | |
| 2022-08-12 | 27.4 ppb | |
| 2022-08-12 | 13.6 ppb | |
| 2022-08-12 | 3.85 ppb | |
| 2022-09-16 | 9.89 ppb | |
| 2022-09-16 | 10.5 ppb | |
| 2022-09-16 | 10.5 ppb | |
| 2022-09-16 | 9.75 ppb | |
| 2022-09-16 | 6.59 ppb | |
| 2022-09-16 | 50.5 ppb | |
| 2022-09-16 | 4.60 ppb | |
| 2022-09-16 | 15.4 ppb | |
| 2022-10-14 | 6.72 ppb | |
| 2022-10-14 | 5.39 ppb | |
| 2022-10-14 | 5.31 ppb | |
| 2022-10-14 | 9.50 ppb | |
| 2022-10-14 | 20.3 ppb | |
| 2022-10-14 | 23.1 ppb | |
| 2022-10-14 | 8.94 ppb | |
| 2022-10-31 | 20.5 ppb | |
| 2022-11-11 | 5.30 ppb | |
| 2022-11-11 | 5.15 ppb | |
| 2022-11-11 | 4.83 ppb | |
| 2022-11-11 | 5.50 ppb | |
| 2022-11-11 | 5.86 ppb | |
| 2022-11-11 | 19.0 ppb | |
| 2022-11-11 | 12.6 ppb | |
| 2022-11-11 | 16.9 ppb | |
| 2022-12-16 | 11.0 ppb | |
| 2022-12-16 | 17.3 ppb | |
| 2022-12-16 | 12.5 ppb | |
| 2022-12-16 | 11.9 ppb | |
| 2022-12-16 | 16.3 ppb | |
| 2022-12-16 | 32.2 ppb | |
| 2022-12-16 | 29.4 ppb | |
| 2022-12-16 | 28.3 ppb | |
| 2023-01-13 | 8.87 ppb | |
| 2023-01-13 | 10.3 ppb | |
| 2023-01-13 | 13.1 ppb | |
| 2023-01-13 | 17.5 ppb | |
| 2023-01-13 | 17.1 ppb | |
| 2023-01-13 | 22.2 ppb | |
| 2023-01-13 | 22.7 ppb | |
| 2023-01-13 | 21.2 ppb | |
| 2023-02-10 | 9.59 ppb | |
| 2023-02-10 | 10.4 ppb | |
| 2023-02-10 | 13.2 ppb | |
| 2023-02-10 | 17.4 ppb | |
| 2023-02-10 | 19.1 ppb | |
| 2023-02-10 | 25.7 ppb | |
| 2023-02-10 | 21.0 ppb | |
| 2023-02-10 | 14.2 ppb | |
| 2023-03-10 | 7.56 ppb | |
| 2023-03-10 | 13.4 ppb | |
| 2023-03-10 | 11.4 ppb | |
| 2023-03-10 | 11.5 ppb | |
| 2023-03-10 | 13.9 ppb | |
| 2023-03-10 | 17.9 ppb | |
| 2023-03-10 | 17.7 ppb | |
| 2023-03-10 | 24.2 ppb | |
| 2023-04-14 | 11.4 ppb | |
| 2023-04-14 | 14.4 ppb | |
| 2023-04-14 | 11.6 ppb | |
| 2023-04-14 | 14.3 ppb | |
| 2023-04-14 | 13.5 ppb | |
| 2023-04-14 | 22.1 ppb | |
| 2023-04-14 | 19.8 ppb | |
| 2023-04-14 | 22.0 ppb | |
| 2023-05-12 | 10.4 ppb | |
| 2023-05-12 | 14.1 ppb | |
| 2023-05-12 | 15.0 ppb | |
| 2023-05-12 | 30.1 ppb | |
| 2023-05-12 | 23.2 ppb | |
| 2023-05-12 | 26.3 ppb | |
| 2023-05-16 | 15.3 ppb | |
| 2023-05-16 | 19.9 ppb | |
| 2023-06-16 | 8.21 ppb | |
| 2023-06-16 | 11.3 ppb | |
| 2023-06-16 | 13.4 ppb | |
| 2023-06-16 | 5.03 ppb | |
| 2023-06-16 | 5.48 ppb | |
| 2023-06-16 | 30.1 ppb | |
| 2023-06-16 | 17.3 ppb | |
| 2023-06-16 | 20.4 ppb | |
| 2023-07-14 | 13.2 ppb | |
| 2023-07-14 | 14.8 ppb | |
| 2023-07-14 | 11.6 ppb | |
| 2023-07-14 | 12.7 ppb | |
| 2023-07-14 | 12.4 ppb | |
| 2023-07-14 | 35.4 ppb | |
| 2023-07-14 | 19.8 ppb | |
| 2023-07-14 | 37.4 ppb | |
| 2023-08-16 | 15.0 ppb | |
| 2023-08-16 | 16.1 ppb | |
| 2023-08-16 | 13.0 ppb | |
| 2023-08-16 | 14.9 ppb | |
| 2023-08-16 | 10.5 ppb | |
| 2023-08-16 | 40.5 ppb | |
| 2023-08-16 | 5.74 ppb | |
| 2023-08-16 | 39.4 ppb | |
| 2023-09-15 | 8.50 ppb | |
| 2023-09-15 | 9.62 ppb | |
| 2023-09-15 | 7.69 ppb | |
| 2023-09-15 | 1.66 ppb | |
| 2023-09-15 | 2.54 ppb | |
| 2023-09-15 | 22.4 ppb | |
| 2023-09-15 | 2.23 ppb | |
| 2023-09-15 | 22.3 ppb | |
| 2023-10-16 | 7.00 ppb | |
| 2023-10-16 | 8.00 ppb | |
| 2023-10-16 | 1.000 ppb | |
| 2023-10-16 | 5.00 ppb | |
| 2023-10-16 | 1.000 ppb | |
| 2023-10-16 | 23.0 ppb | |
| 2023-10-16 | ND | |
| 2023-10-16 | 26.0 ppb | |
| 2023-11-13 | 6.00 ppb | |
| 2023-11-13 | 9.00 ppb | |
| 2023-11-13 | 6.00 ppb | |
| 2023-11-13 | 6.00 ppb | |
| 2023-11-13 | 4.00 ppb | |
| 2023-11-13 | 22.0 ppb | |
| 2023-11-13 | 5.00 ppb | |
| 2023-11-13 | 21.0 ppb | |
| 2023-12-12 | 11.0 ppb | |
| 2023-12-12 | 7.00 ppb | |
| 2023-12-12 | 7.00 ppb | |
| 2023-12-12 | 8.00 ppb | |
| 2023-12-12 | 7.00 ppb | |
| 2023-12-12 | 15.0 ppb | |
| 2023-12-12 | 6.00 ppb | |
| 2023-12-12 | 15.0 ppb |