Dichloroacetic acid
Beaver Dam Water Utility
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 |
|---|---|---|---|---|
| 2014 | 0.828 ppb | 16 | 16 | 0.351 ppb - 1.51 ppb |
| 2015 | 0.223 ppb | 16 | 8 | ND - 0.569 ppb |
| 2016 | 0.173 ppb | 6 | 2 | ND - 0.691 ppb |
| 2017 | 0.850 ppb | 2 | 2 | 0.800 ppb - 0.900 ppb |
| 2018 | 0.550 ppb | 2 | 2 | 0.500 ppb - 0.600 ppb |
| 2019 | 0.750 ppb | 2 | 2 | 0.700 ppb - 0.800 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 | 4020610-02 | 0.540 ppb |
| 2014-02-18 | 4020610-05 | 0.850 ppb |
| 2014-02-18 | 4020610-03 | 0.660 ppb |
| 2014-02-18 | 4020610-04 | 0.700 ppb |
| 2014-05-19 | 4050664-02 | 0.531 ppb |
| 2014-05-19 | 4050664-01 | 0.508 ppb |
| 2014-05-19 | 4050664-04 | 0.747 ppb |
| 2014-05-19 | 4050664-03 | 0.657 ppb |
| 2014-08-12 | 4080521-01 | 0.351 ppb |
| 2014-08-12 | 4080525-01 | 0.501 ppb |
| 2014-08-12 | 4080523-01 | 0.816 ppb |
| 2014-08-12 | 4080524-01 | 0.852 ppb |
| 2014-11-18 | 4110674-01 | 1.29 ppb |
| 2014-11-18 | 4110674-02 | 1.29 ppb |
| 2014-11-18 | 4110674-04 | 1.45 ppb |
| 2014-11-18 | 4110674-03 | 1.51 ppb |
| 2015-02-16 | 5020540-01 | ND |
| 2015-02-16 | 5020540-02 | ND |
| 2015-02-16 | 5020537-01 | ND |
| 2015-02-16 | 5020537-02 | ND |
| 2015-05-22 | 5050951-04 | 0.569 ppb |
| 2015-05-22 | 5050951-03 | 0.508 ppb |
| 2015-05-22 | 5050951-01 | 0.474 ppb |
| 2015-05-22 | 5050951-02 | 0.494 ppb |
| 2015-08-12 | 5080576-01 | ND |
| 2015-08-12 | 5080575-01 | 0.277 ppb |
| 2015-08-12 | 5080577-01 | 0.288 ppb |
| 2015-08-12 | 5080573-01 | 0.424 ppb |
| 2015-11-11 | 5110416-01 | ND |
| 2015-11-11 | 5110414-01 | ND |
| 2015-11-11 | 5110412-01 | ND |
| 2015-11-11 | 5110418-01 | 0.538 ppb |
| 2016-02-22 | 6020769-01 | ND |
| 2016-02-22 | 6020768-01 | 0.691 ppb |
| 2016-02-22 | 6020765-01 | 0.348 ppb |
| 2016-02-22 | 6020764-01 | ND |
| 2016-11-09 | 6110440-01 | ND |
| 2016-12-14 | 6120516-01 | ND |
| 2017-12-18 | 3841592 | 0.800 ppb |
| 2017-12-18 | 3841576 | 0.900 ppb |
| 2018-10-29 | 4107097 | 0.500 ppb |
| 2018-10-29 | 4107096 | 0.600 ppb |
| 2019-10-16 | 4460104 | 0.700 ppb |
| 2019-10-16 | 4460232 | 0.800 ppb |