Trichloroacetic acid
City of Denham Springs 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 | 1.79 ppb | 32 | 32 | 0.350 ppb - 3.80 ppb |
| 2019 | 1.27 ppb | 32 | 22 | ND - 9.60 ppb |
| 2020 | 1.18 ppb | 16 | 16 | 0.330 ppb - 2.90 ppb |
| 2021 | 0.905 ppb | 16 | 13 | ND - 2.30 ppb |
| 2022 | 1.56 ppb | 16 | 15 | ND - 3.30 ppb |
| 2023 | 1.26 ppb | 16 | 13 | ND - 2.20 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 |
|---|---|---|
| 2018-02-01 | 35371846001 | 2.50 ppb |
| 2018-02-01 | 35371846002 | 2.70 ppb |
| 2018-02-01 | 35371846003 | 0.690 ppb |
| 2018-02-01 | 35371846004 | 2.60 ppb |
| 2018-02-01 | 35371846001 | 2.50 ppb |
| 2018-02-01 | 35371846002 | 2.70 ppb |
| 2018-02-01 | 35371846003 | 0.690 ppb |
| 2018-02-01 | 35371846004 | 2.60 ppb |
| 2018-05-04 | 35390308001 | 1.90 ppb |
| 2018-05-04 | 35390308002 | 1.80 ppb |
| 2018-05-04 | 35390308003 | 2.20 ppb |
| 2018-05-04 | 35390308004 | 0.350 ppb |
| 2018-05-04 | 35390308001 | 1.90 ppb |
| 2018-05-04 | 35390308002 | 1.80 ppb |
| 2018-05-04 | 35390308003 | 2.20 ppb |
| 2018-05-04 | 35390308004 | 0.350 ppb |
| 2018-08-07 | 35409812001 | 2.80 ppb |
| 2018-08-07 | 35409812002 | 3.80 ppb |
| 2018-08-07 | 35409812003 | 3.10 ppb |
| 2018-08-07 | 35409812004 | 0.700 ppb |
| 2018-08-07 | 35409812001 | 2.80 ppb |
| 2018-08-07 | 35409812002 | 3.80 ppb |
| 2018-08-07 | 35409812003 | 3.10 ppb |
| 2018-08-07 | 35409812004 | 0.700 ppb |
| 2018-11-02 | 35428194001 | 0.720 ppb |
| 2018-11-02 | 35428194002 | 1.30 ppb |
| 2018-11-02 | 35428194003 | 0.790 ppb |
| 2018-11-02 | 35428194004 | 0.620 ppb |
| 2018-11-02 | 35428194001 | 0.720 ppb |
| 2018-11-02 | 35428194002 | 1.30 ppb |
| 2018-11-02 | 35428194003 | 0.790 ppb |
| 2018-11-02 | 35428194004 | 0.620 ppb |
| 2019-02-15 | 35448841001 | ND |
| 2019-02-15 | 35448841002 | 0.840 ppb |
| 2019-02-15 | 35448841003 | 2.50 ppb |
| 2019-02-15 | 35448841004 | ND |
| 2019-02-15 | 35448841001 | ND |
| 2019-02-15 | 35448841002 | 0.840 ppb |
| 2019-02-15 | 35448841003 | 2.50 ppb |
| 2019-02-15 | 35448841004 | ND |
| 2019-05-03 | 35466097001 | ND |
| 2019-05-03 | 35466097002 | ND |
| 2019-05-03 | 35466097003 | 9.60 ppb |
| 2019-05-03 | 35466097004 | ND |
| 2019-05-03 | 35466097001 | ND |
| 2019-05-03 | 35466097002 | ND |
| 2019-05-03 | 35466097003 | 9.60 ppb |
| 2019-05-03 | 35466097004 | ND |
| 2019-08-01 | 35486871001 | 0.760 ppb |
| 2019-08-01 | 35486871002 | 0.820 ppb |
| 2019-08-01 | 35486871003 | 0.830 ppb |
| 2019-08-01 | 35486871004 | 0.630 ppb |
| 2019-08-01 | 35486871001 | 0.760 ppb |
| 2019-08-01 | 35486871002 | 0.820 ppb |
| 2019-08-01 | 35486871003 | 0.830 ppb |
| 2019-08-01 | 35486871004 | 0.630 ppb |
| 2019-11-01 | 35509128001 | 0.660 ppb |
| 2019-11-01 | 35509128002 | 1.20 ppb |
| 2019-11-01 | 35509128003 | 2.00 ppb |
| 2019-11-01 | 35509128004 | 0.500 ppb |
| 2019-11-01 | 35509128001 | 0.660 ppb |
| 2019-11-01 | 35509128002 | 1.20 ppb |
| 2019-11-01 | 35509128003 | 2.00 ppb |
| 2019-11-01 | 35509128004 | 0.500 ppb |
| 2020-02-06 | 35529494001 | 0.700 ppb |
| 2020-02-06 | 35529494002 | 0.430 ppb |
| 2020-02-06 | 35529494003 | 1.10 ppb |
| 2020-02-06 | 35529494004 | 0.370 ppb |
| 2020-05-01 | 35547151001 | 0.340 ppb |
| 2020-05-01 | 35547151002 | 0.970 ppb |
| 2020-05-01 | 35547151003 | 1.70 ppb |
| 2020-05-01 | 35547151004 | 0.330 ppb |
| 2020-08-06 | 35569085001 | 2.90 ppb |
| 2020-08-06 | 35569085002 | 1.40 ppb |
| 2020-08-06 | 35569085003 | 2.50 ppb |
| 2020-08-24 | 35573325001 | 0.400 ppb |
| 2020-11-06 | 35590481001 | 2.20 ppb |
| 2020-11-06 | 35590481002 | 1.10 ppb |
| 2020-11-06 | 35590481003 | 1.90 ppb |
| 2020-11-06 | 35590481004 | 0.540 ppb |
| 2021-02-05 | 35609996001 | ND |
| 2021-02-05 | 35609996002 | 0.910 ppb |
| 2021-02-05 | 35609996003 | 1.20 ppb |
| 2021-02-05 | 35609996004 | ND |
| 2021-05-06 | 35631658001 | 0.660 ppb |
| 2021-05-06 | 35631658002 | 0.880 ppb |
| 2021-05-06 | 35631658003 | 1.10 ppb |
| 2021-05-06 | 35631658004 | ND |
| 2021-08-12 | 35655918001 | 1.000 ppb |
| 2021-08-12 | 35655918002 | 1.30 ppb |
| 2021-08-12 | 35655918003 | 0.470 ppb |
| 2021-08-12 | 35655918004 | 1.90 ppb |
| 2021-11-05 | 35676298001 | 2.30 ppb |
| 2021-11-05 | 35676298002 | 1.10 ppb |
| 2021-11-05 | 35676298003 | 1.30 ppb |
| 2021-11-05 | 35676298004 | 0.360 ppb |
| 2022-02-10 | 35696562001 | 2.40 ppb |
| 2022-02-10 | 35696562002 | 1.50 ppb |
| 2022-02-10 | 35696562003 | 1.40 ppb |
| 2022-02-10 | 35696562004 | 0.390 ppb |
| 2022-05-06 | 35715937001 | 2.20 ppb |
| 2022-05-06 | 35715937002 | 1.20 ppb |
| 2022-05-06 | 35715937003 | 1.40 ppb |
| 2022-05-06 | 35715937004 | 0.600 ppb |
| 2022-08-17 | 35741192001 | 1.10 ppb |
| 2022-08-17 | 35741192002 | 2.50 ppb |
| 2022-08-17 | 35741192003 | ND |
| 2022-08-17 | 35741192004 | 3.30 ppb |
| 2022-11-04 | 35758150001 | 2.50 ppb |
| 2022-11-04 | 35758150002 | 1.40 ppb |
| 2022-11-04 | 35758150003 | 2.60 ppb |
| 2022-11-04 | 35758150004 | 0.500 ppb |
| 2023-02-03 | 35776990001 | 0.810 ppb |
| 2023-02-03 | 35776990002 | 1.40 ppb |
| 2023-02-03 | 35776990003 | 1.80 ppb |
| 2023-02-03 | 35776990004 | 1.20 ppb |
| 2023-05-05 | 35797781001 | 1.70 ppb |
| 2023-05-05 | 35797781002 | 1.000 ppb |
| 2023-05-05 | 35797781003 | 1.50 ppb |
| 2023-05-05 | 35797781004 | ND |
| 2023-08-30 | 35824650001 | 1.40 ppb |
| 2023-08-30 | 35824650002 | 1.70 ppb |
| 2023-08-30 | 35824650003 | ND |
| 2023-08-30 | 35824650004 | 2.20 ppb |
| 2023-11-03 | 35839248001 | 2.00 ppb |
| 2023-11-03 | 35839248002 | 1.30 ppb |
| 2023-11-03 | 35839248003 | 2.20 ppb |
| 2023-11-03 | 35839248004 | ND |