Trichloroacetic acid
Quail Ridge Estates Water System
Trichloroacetic 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 | 0.880 ppb | 4 | 4 | 0.880 ppb |
| 2019 | 0.653 ppb | 6 | 4 | ND - 0.990 ppb |
| 2020 | 0.955 ppb | 2 | 2 | 0.940 ppb - 0.970 ppb |
| 2021 | 0.805 ppb | 2 | 2 | 0.750 ppb - 0.860 ppb |
| 2022 | 0.335 ppb | 2 | 1 | ND - 0.670 ppb |
| 2023 | 0.885 ppb | 2 | 2 | 0.860 ppb - 0.910 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.1 ppb
The EWG Health Guideline of 0.1 ppb for trichloroacetic 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 |
|---|---|---|
| 2018-08-01 | 35408718002 | 0.880 ppb |
| 2018-08-01 | 35408718001 | 0.880 ppb |
| 2018-08-01 | 35408718002 | 0.880 ppb |
| 2018-08-01 | 35408718001 | 0.880 ppb |
| 2019-08-07 | 35489023002 | ND |
| 2019-08-07 | 35489023002 | ND |
| 2019-08-28 | 35494532002 | 0.990 ppb |
| 2019-08-28 | 35494532002 | 0.990 ppb |
| 2019-08-28 | 35494532001 | 0.970 ppb |
| 2019-08-28 | 35494532001 | 0.970 ppb |
| 2020-08-07 | 35569023001 | 0.970 ppb |
| 2020-08-07 | 35569023002 | 0.940 ppb |
| 2021-08-06 | 35653763001 | 0.750 ppb |
| 2021-08-06 | 35653763002 | 0.860 ppb |
| 2022-08-17 | 35741539001 | 0.670 ppb |
| 2022-08-17 | 35741539002 | ND |
| 2023-08-09 | 35819905001 | 0.860 ppb |
| 2023-08-09 | 35819905002 | 0.910 ppb |