Dichloroacetic acid
Mcgraw Village
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 | 2.36 ppb | 2 | 2 | 2.28 ppb - 2.43 ppb |
| 2015 | 1.65 ppb | 2 | 2 | 1.60 ppb - 1.70 ppb |
| 2016 | 1.55 ppb | 2 | 2 | 1.40 ppb - 1.70 ppb |
| 2017 | 0.349 ppb | 2 | 1 | ND - 0.698 ppb |
| 2018 | 0.600 ppb | 2 | 1 | ND - 1.20 ppb |
| 2019 | 1.75 ppb | 2 | 2 | 1.36 ppb - 2.13 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 |
|---|---|---|
| 2014-08-04 | LRAA2 14 MCGRAW | 2.43 ppb |
| 2014-08-04 | LRAA1 14 MCGRAW | 2.28 ppb |
| 2015-08-06 | LRAA2 15 MCGRAW | 1.60 ppb |
| 2015-08-06 | LRAA1 15 MCGRAW | 1.70 ppb |
| 2016-08-04 | LRAA1 16 MCGRAW | 1.70 ppb |
| 2016-08-04 | LRAA2 16 MCGRAW | 1.40 ppb |
| 2017-08-02 | LRAA2 17 MCGRAW | ND |
| 2017-08-02 | LRAA1 17 MCGRAW | 0.698 ppb |
| 2018-08-06 | LRAA1 18 MCGRAW | 1.20 ppb |
| 2018-08-06 | LRAA2 18 MCGRAW | ND |
| 2019-08-19 | LRAA2 19 MCGRAW | 1.36 ppb |
| 2019-08-19 | LRAA1 19 MCGRAW | 2.13 ppb |