Trichloroacetic acid
Lafourche Water District 1
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 | 5.40 ppb | 64 | 64 | 4.40 ppb - 6.30 ppb |
| 2019 | 6.30 ppb | 64 | 64 | 5.30 ppb - 8.00 ppb |
| 2020 | 5.73 ppb | 32 | 32 | 4.50 ppb - 6.80 ppb |
| 2021 | 5.18 ppb | 32 | 32 | 3.70 ppb - 6.20 ppb |
| 2022 | 5.17 ppb | 40 | 40 | 4.10 ppb - 7.80 ppb |
| 2023 | 5.08 ppb | 32 | 32 | 3.40 ppb - 8.70 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 |
|---|---|---|
| 2018-03-08 | 35379404001 | 4.80 ppb |
| 2018-03-08 | 35379404002 | 5.30 ppb |
| 2018-03-08 | 35379404003 | 4.40 ppb |
| 2018-03-08 | 35379404004 | 4.50 ppb |
| 2018-03-08 | 35379404005 | 5.10 ppb |
| 2018-03-08 | 35379404006 | 6.20 ppb |
| 2018-03-08 | 35379404007 | 4.80 ppb |
| 2018-03-08 | 35379404008 | 6.10 ppb |
| 2018-03-08 | 35379404001 | 4.80 ppb |
| 2018-03-08 | 35379404002 | 5.30 ppb |
| 2018-03-08 | 35379404003 | 4.40 ppb |
| 2018-03-08 | 35379404004 | 4.50 ppb |
| 2018-03-08 | 35379404005 | 5.10 ppb |
| 2018-03-08 | 35379404006 | 6.20 ppb |
| 2018-03-08 | 35379404007 | 4.80 ppb |
| 2018-03-08 | 35379404008 | 6.10 ppb |
| 2018-06-07 | 35397135001 | 5.70 ppb |
| 2018-06-07 | 35397135002 | 6.30 ppb |
| 2018-06-07 | 35397135003 | 5.60 ppb |
| 2018-06-07 | 35397135004 | 5.60 ppb |
| 2018-06-07 | 35397135005 | 6.00 ppb |
| 2018-06-07 | 35397135006 | 5.90 ppb |
| 2018-06-07 | 35397135007 | 5.90 ppb |
| 2018-06-07 | 35397135008 | 6.10 ppb |
| 2018-06-07 | 35397135001 | 5.70 ppb |
| 2018-06-07 | 35397135002 | 6.30 ppb |
| 2018-06-07 | 35397135003 | 5.60 ppb |
| 2018-06-07 | 35397135004 | 5.60 ppb |
| 2018-06-07 | 35397135005 | 6.00 ppb |
| 2018-06-07 | 35397135006 | 5.90 ppb |
| 2018-06-07 | 35397135007 | 5.90 ppb |
| 2018-06-07 | 35397135008 | 6.10 ppb |
| 2018-09-18 | 35418817001 | 4.90 ppb |
| 2018-09-18 | 35418817002 | 5.20 ppb |
| 2018-09-18 | 35418817003 | 4.90 ppb |
| 2018-09-18 | 35418817004 | 5.20 ppb |
| 2018-09-18 | 35418817005 | 5.40 ppb |
| 2018-09-18 | 35418817006 | 5.60 ppb |
| 2018-09-18 | 35418817007 | 5.40 ppb |
| 2018-09-18 | 35418817008 | 5.40 ppb |
| 2018-09-18 | 35418817001 | 4.90 ppb |
| 2018-09-18 | 35418817002 | 5.20 ppb |
| 2018-09-18 | 35418817003 | 4.90 ppb |
| 2018-09-18 | 35418817004 | 5.20 ppb |
| 2018-09-18 | 35418817005 | 5.40 ppb |
| 2018-09-18 | 35418817006 | 5.60 ppb |
| 2018-09-18 | 35418817007 | 5.40 ppb |
| 2018-09-18 | 35418817008 | 5.40 ppb |
| 2018-12-12 | 35437061001 | 6.20 ppb |
| 2018-12-12 | 35437061002 | 5.60 ppb |
| 2018-12-12 | 35437061003 | 5.80 ppb |
| 2018-12-12 | 35437061004 | 5.90 ppb |
| 2018-12-12 | 35437061005 | 5.10 ppb |
| 2018-12-12 | 35437061006 | 4.70 ppb |
| 2018-12-12 | 35437061007 | 4.70 ppb |
| 2018-12-12 | 35437061008 | 4.60 ppb |
| 2018-12-12 | 35437061001 | 6.20 ppb |
| 2018-12-12 | 35437061002 | 5.60 ppb |
| 2018-12-12 | 35437061003 | 5.80 ppb |
| 2018-12-12 | 35437061004 | 5.90 ppb |
| 2018-12-12 | 35437061005 | 5.10 ppb |
| 2018-12-12 | 35437061006 | 4.70 ppb |
| 2018-12-12 | 35437061007 | 4.70 ppb |
| 2018-12-12 | 35437061008 | 4.60 ppb |
| 2019-03-08 | 35453431001 | 7.30 ppb |
| 2019-03-08 | 35453431002 | 8.00 ppb |
| 2019-03-08 | 35453431003 | 7.90 ppb |
| 2019-03-08 | 35453431004 | 8.00 ppb |
| 2019-03-08 | 35453431005 | 6.10 ppb |
| 2019-03-08 | 35453431006 | 6.60 ppb |
| 2019-03-08 | 35453431007 | 6.40 ppb |
| 2019-03-08 | 35453431008 | 6.40 ppb |
| 2019-03-08 | 35453431001 | 7.30 ppb |
| 2019-03-08 | 35453431002 | 8.00 ppb |
| 2019-03-08 | 35453431003 | 7.90 ppb |
| 2019-03-08 | 35453431004 | 8.00 ppb |
| 2019-03-08 | 35453431005 | 6.10 ppb |
| 2019-03-08 | 35453431006 | 6.60 ppb |
| 2019-03-08 | 35453431007 | 6.40 ppb |
| 2019-03-08 | 35453431008 | 6.40 ppb |
| 2019-06-13 | 35475504001 | 6.90 ppb |
| 2019-06-13 | 35475504002 | 6.70 ppb |
| 2019-06-13 | 35475504003 | 6.80 ppb |
| 2019-06-13 | 35475504004 | 6.70 ppb |
| 2019-06-13 | 35475504005 | 7.00 ppb |
| 2019-06-13 | 35475504006 | 6.40 ppb |
| 2019-06-13 | 35475504007 | 6.80 ppb |
| 2019-06-13 | 35475504008 | 6.30 ppb |
| 2019-06-13 | 35475504001 | 6.90 ppb |
| 2019-06-13 | 35475504002 | 6.70 ppb |
| 2019-06-13 | 35475504003 | 6.80 ppb |
| 2019-06-13 | 35475504004 | 6.70 ppb |
| 2019-06-13 | 35475504005 | 7.00 ppb |
| 2019-06-13 | 35475504006 | 6.40 ppb |
| 2019-06-13 | 35475504007 | 6.80 ppb |
| 2019-06-13 | 35475504008 | 6.30 ppb |
| 2019-09-03 | 35494663001 | 5.50 ppb |
| 2019-09-03 | 35494663002 | 5.60 ppb |
| 2019-09-03 | 35494663003 | 5.50 ppb |
| 2019-09-03 | 35494663004 | 5.40 ppb |
| 2019-09-03 | 35494663005 | 6.40 ppb |
| 2019-09-03 | 35494663006 | 6.60 ppb |
| 2019-09-03 | 35494663007 | 6.50 ppb |
| 2019-09-03 | 35494663008 | 6.20 ppb |
| 2019-09-03 | 35494663001 | 5.50 ppb |
| 2019-09-03 | 35494663002 | 5.60 ppb |
| 2019-09-03 | 35494663003 | 5.50 ppb |
| 2019-09-03 | 35494663004 | 5.40 ppb |
| 2019-09-03 | 35494663005 | 6.40 ppb |
| 2019-09-03 | 35494663006 | 6.60 ppb |
| 2019-09-03 | 35494663007 | 6.50 ppb |
| 2019-09-03 | 35494663008 | 6.20 ppb |
| 2019-12-05 | 35516987001 | 5.40 ppb |
| 2019-12-05 | 35516987002 | 5.40 ppb |
| 2019-12-05 | 35516987003 | 5.30 ppb |
| 2019-12-05 | 35516987004 | 5.30 ppb |
| 2019-12-05 | 35516987005 | 5.40 ppb |
| 2019-12-05 | 35516987006 | 5.50 ppb |
| 2019-12-05 | 35516987007 | 5.50 ppb |
| 2019-12-05 | 35516987008 | 5.90 ppb |
| 2019-12-05 | 35516987001 | 5.40 ppb |
| 2019-12-05 | 35516987002 | 5.40 ppb |
| 2019-12-05 | 35516987003 | 5.30 ppb |
| 2019-12-05 | 35516987004 | 5.30 ppb |
| 2019-12-05 | 35516987005 | 5.40 ppb |
| 2019-12-05 | 35516987006 | 5.50 ppb |
| 2019-12-05 | 35516987007 | 5.50 ppb |
| 2019-12-05 | 35516987008 | 5.90 ppb |
| 2020-03-06 | 35535842001 | 4.70 ppb |
| 2020-03-06 | 35535842002 | 5.20 ppb |
| 2020-03-06 | 35535842003 | 4.50 ppb |
| 2020-03-06 | 35535842004 | 4.60 ppb |
| 2020-03-06 | 35535842005 | 5.30 ppb |
| 2020-03-06 | 35535842006 | 5.40 ppb |
| 2020-03-06 | 35535842007 | 5.30 ppb |
| 2020-03-06 | 35535842008 | 5.60 ppb |
| 2020-06-04 | 35554620001 | 5.90 ppb |
| 2020-06-04 | 35554620002 | 5.90 ppb |
| 2020-06-04 | 35554620003 | 5.70 ppb |
| 2020-06-04 | 35554620004 | 5.70 ppb |
| 2020-06-04 | 35554620005 | 6.20 ppb |
| 2020-06-04 | 35554620006 | 6.40 ppb |
| 2020-06-04 | 35554620007 | 6.40 ppb |
| 2020-06-04 | 35554620008 | 6.80 ppb |
| 2020-09-24 | 35580404001 | 5.30 ppb |
| 2020-09-24 | 35580404002 | 5.40 ppb |
| 2020-09-24 | 35580404003 | 5.00 ppb |
| 2020-09-24 | 35580404004 | 5.40 ppb |
| 2020-09-24 | 35580404005 | 6.10 ppb |
| 2020-09-24 | 35580404006 | 5.90 ppb |
| 2020-09-24 | 35580404007 | 5.80 ppb |
| 2020-09-24 | 35580404008 | 5.90 ppb |
| 2020-12-03 | 35596506001 | 5.30 ppb |
| 2020-12-03 | 35596506002 | 6.40 ppb |
| 2020-12-03 | 35596506003 | 6.50 ppb |
| 2020-12-03 | 35596506004 | 6.10 ppb |
| 2020-12-03 | 35596506005 | 5.60 ppb |
| 2020-12-03 | 35596506006 | 6.50 ppb |
| 2020-12-03 | 35596506007 | 6.60 ppb |
| 2020-12-03 | 35596506008 | 6.10 ppb |
| 2021-03-04 | 35616954001 | 5.80 ppb |
| 2021-03-04 | 35616954002 | 6.10 ppb |
| 2021-03-04 | 35616954003 | 5.90 ppb |
| 2021-03-04 | 35616954004 | 5.80 ppb |
| 2021-03-04 | 35616954005 | 5.80 ppb |
| 2021-03-04 | 35616954006 | 6.20 ppb |
| 2021-03-04 | 35616954007 | 6.00 ppb |
| 2021-03-04 | 35616954008 | 6.10 ppb |
| 2021-06-02 | 35638298001 | 4.70 ppb |
| 2021-06-03 | 35638298002 | 4.80 ppb |
| 2021-06-03 | 35638298003 | 4.40 ppb |
| 2021-06-03 | 35638298004 | 4.90 ppb |
| 2021-06-03 | 35638298005 | 5.90 ppb |
| 2021-06-03 | 35638298006 | 5.60 ppb |
| 2021-06-03 | 35638298007 | 5.70 ppb |
| 2021-06-03 | 35638298008 | 5.80 ppb |
| 2021-09-22 | 35667103001 | 5.30 ppb |
| 2021-09-22 | 35667103002 | 5.50 ppb |
| 2021-09-22 | 35667103003 | 5.60 ppb |
| 2021-09-22 | 35667103004 | 5.70 ppb |
| 2021-09-22 | 35667103005 | 4.70 ppb |
| 2021-09-22 | 35667103006 | 4.80 ppb |
| 2021-09-22 | 35667103007 | 4.50 ppb |
| 2021-09-22 | 35667103008 | 4.90 ppb |
| 2021-12-16 | 35684984001 | 3.90 ppb |
| 2021-12-16 | 35684984002 | 4.30 ppb |
| 2021-12-16 | 35684984003 | 3.70 ppb |
| 2021-12-16 | 35684984004 | 4.00 ppb |
| 2021-12-16 | 35684984005 | 5.10 ppb |
| 2021-12-16 | 35684984006 | 4.80 ppb |
| 2021-12-16 | 35684984007 | 4.80 ppb |
| 2021-12-16 | 35684984008 | 4.60 ppb |
| 2022-03-10 | 35702934001 | 4.20 ppb |
| 2022-03-10 | 35702934002 | 4.10 ppb |
| 2022-03-10 | 35702934003 | 4.20 ppb |
| 2022-03-10 | 35702934004 | 4.10 ppb |
| 2022-03-10 | 35702934005 | 4.30 ppb |
| 2022-03-10 | 35702934006 | 4.60 ppb |
| 2022-03-10 | 35702934007 | 4.90 ppb |
| 2022-03-10 | 35702934008 | 4.50 ppb |
| 2022-06-23 | B2202884-001 | 5.18 ppb |
| 2022-06-23 | B2202884-002 | 4.38 ppb |
| 2022-06-23 | B2202884-003 | 4.64 ppb |
| 2022-06-23 | B2202884-004 | 4.82 ppb |
| 2022-06-23 | B2202884-005 | 4.66 ppb |
| 2022-06-23 | B2202884-006 | 4.63 ppb |
| 2022-06-23 | B2202884-007 | 4.63 ppb |
| 2022-06-23 | B2202884-008 | 4.62 ppb |
| 2022-07-26 | 35734625001 | 5.40 ppb |
| 2022-07-26 | 35734625002 | 4.70 ppb |
| 2022-07-26 | 35734625003 | 6.10 ppb |
| 2022-07-26 | 35734625004 | 4.50 ppb |
| 2022-07-26 | 35734625005 | 6.50 ppb |
| 2022-07-26 | 35734625006 | 5.80 ppb |
| 2022-07-26 | 35734625007 | 4.90 ppb |
| 2022-07-26 | 35734625008 | 5.10 ppb |
| 2022-09-01 | 35744138001 | 6.60 ppb |
| 2022-09-01 | 35744138002 | 7.80 ppb |
| 2022-09-01 | 35744138003 | 6.10 ppb |
| 2022-09-01 | 35744138004 | 6.70 ppb |
| 2022-09-01 | 35744138005 | 6.60 ppb |
| 2022-09-01 | 35744138006 | 6.00 ppb |
| 2022-09-01 | 35744138007 | 6.10 ppb |
| 2022-09-01 | 35744138008 | 6.10 ppb |
| 2022-12-01 | 35763417001 | 4.50 ppb |
| 2022-12-01 | 35763417002 | 4.60 ppb |
| 2022-12-01 | 35763417003 | 4.70 ppb |
| 2022-12-01 | 35763417004 | 5.10 ppb |
| 2022-12-01 | 35763417005 | 5.30 ppb |
| 2022-12-01 | 35763417006 | 4.80 ppb |
| 2022-12-01 | 35763417007 | 5.30 ppb |
| 2022-12-01 | 35763417008 | 5.00 ppb |
| 2023-03-09 | 35784955001 | 4.40 ppb |
| 2023-03-09 | 35784955002 | 5.00 ppb |
| 2023-03-09 | 35784955003 | 4.30 ppb |
| 2023-03-09 | 35784955004 | 4.80 ppb |
| 2023-03-09 | 35784955005 | 5.40 ppb |
| 2023-03-09 | 35784955006 | 5.40 ppb |
| 2023-03-09 | 35784955007 | 5.30 ppb |
| 2023-03-09 | 35784955008 | 5.30 ppb |
| 2023-06-08 | 35805314001 | 6.70 ppb |
| 2023-06-08 | 35805314002 | 7.00 ppb |
| 2023-06-08 | 35805314003 | 7.10 ppb |
| 2023-06-08 | 35805314004 | 8.20 ppb |
| 2023-06-08 | 35805314005 | 8.70 ppb |
| 2023-06-08 | 35805314006 | 7.70 ppb |
| 2023-06-08 | 35805314007 | 8.00 ppb |
| 2023-06-08 | 35805314008 | 7.60 ppb |
| 2023-09-01 | 35824774001 | 3.60 ppb |
| 2023-09-01 | 35824774002 | 3.80 ppb |
| 2023-09-01 | 35824774003 | 3.50 ppb |
| 2023-09-01 | 35824774004 | 3.40 ppb |
| 2023-09-01 | 35824774005 | 3.70 ppb |
| 2023-09-01 | 35824774006 | 3.60 ppb |
| 2023-09-01 | 35824774007 | 3.60 ppb |
| 2023-09-01 | 35824774008 | 3.60 ppb |
| 2023-12-01 | 35845081001 | 3.70 ppb |
| 2023-12-01 | 35845081002 | 3.80 ppb |
| 2023-12-01 | 35845081003 | 3.80 ppb |
| 2023-12-01 | 35845081004 | 3.70 ppb |
| 2023-12-01 | 35845081005 | 4.90 ppb |
| 2023-12-01 | 35845081006 | 4.50 ppb |
| 2023-12-01 | 35845081007 | 4.10 ppb |
| 2023-12-01 | 35845081008 | 4.20 ppb |