Dichloroacetic acid
Onalaska Waterworks
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 | 0.291 ppb | 2 | 1 | ND - 0.582 ppb |
2015 | 0.867 ppb | 2 | 2 | 0.788 ppb - 0.945 ppb |
2016 | 0.657 ppb | 2 | 2 | 0.482 ppb - 0.832 ppb |
2017 | 0.424 ppb | 2 | 2 | 0.416 ppb - 0.431 ppb |
2018 | 1.11 ppb | 4 | 4 | 0.872 ppb - 1.28 ppb |
2019 | 2.96 ppb | 2 | 2 | 2.89 ppb - 3.03 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 |
---|---|---|
2014-07-08 | 4070279-06 | ND |
2014-07-08 | 4070279-05 | 0.582 ppb |
2015-09-16 | 5090660-01 | 0.788 ppb |
2015-09-16 | 5090660-02 | 0.945 ppb |
2016-08-24 | 6080993-04 | 0.482 ppb |
2016-08-24 | 6080993-03 | 0.832 ppb |
2017-07-12 | 17G0375-01 | 0.416 ppb |
2017-07-12 | 17G0375-02 | 0.431 ppb |
2018-07-11 | 18G0365-01 | 1.28 ppb |
2018-07-11 | 18G0365-02 | 1.28 ppb |
2018-08-02 | 18H0132-01 | 0.872 ppb |
2018-08-02 | 18H0132-02 | 1.02 ppb |
2019-08-27 | 19H0950-01 | 2.89 ppb |
2019-08-27 | 19H0950-02 | 3.03 ppb |