Trichloroacetic acid
New Berlin Water Utility
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 |
|---|---|---|---|---|
| 2014 | 1.24 ppb | 16 | 16 | 0.400 ppb - 2.30 ppb |
| 2015 | 0.860 ppb | 16 | 15 | ND - 1.30 ppb |
| 2016 | 0.685 ppb | 16 | 15 | ND - 1.10 ppb |
| 2017 | 0.700 ppb | 16 | 16 | 0.320 ppb - 1.000 ppb |
| 2018 | 1.02 ppb | 16 | 16 | 0.760 ppb - 1.50 ppb |
| 2019 | 0.375 ppb | 16 | 12 | ND - 0.940 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.1 ppb
The EWG Health Guideline of 0.1 ppb for trichloroacetic 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 |
|---|---|---|
| 2014-03-13 | 774636 | 0.640 ppb |
| 2014-03-13 | 774637 | 0.750 ppb |
| 2014-03-13 | 774639 | 0.820 ppb |
| 2014-03-13 | 774638 | 0.400 ppb |
| 2014-06-11 | 796325 | 2.00 ppb |
| 2014-06-11 | 796324 | 2.10 ppb |
| 2014-06-11 | 796323 | 2.10 ppb |
| 2014-06-11 | 796326 | 2.30 ppb |
| 2014-09-11 | 817673 | 1.60 ppb |
| 2014-09-11 | 817675 | 1.30 ppb |
| 2014-09-11 | 817676 | 0.730 ppb |
| 2014-09-11 | 817674 | 0.910 ppb |
| 2014-12-10 | 835348 | 1.000 ppb |
| 2014-12-10 | 835345 | 1.20 ppb |
| 2014-12-10 | 835347 | 1.40 ppb |
| 2014-12-10 | 835346 | 0.650 ppb |
| 2015-03-11 | 847864 | 1.20 ppb |
| 2015-03-11 | 847863 | 0.700 ppb |
| 2015-03-11 | 847862 | 1.20 ppb |
| 2015-03-11 | 847861 | 1.20 ppb |
| 2015-06-10 | 864857 | 1.20 ppb |
| 2015-06-10 | 864856 | 0.850 ppb |
| 2015-06-10 | 864858 | 0.800 ppb |
| 2015-06-10 | 864859 | 0.630 ppb |
| 2015-09-09 | 881887 | 0.650 ppb |
| 2015-09-09 | 881890 | 0.730 ppb |
| 2015-09-09 | 881889 | 0.750 ppb |
| 2015-09-09 | 881888 | 0.870 ppb |
| 2015-12-09 | 897617 | 0.580 ppb |
| 2015-12-09 | 897616 | 1.30 ppb |
| 2015-12-09 | 897618 | 1.10 ppb |
| 2015-12-09 | 897615 | ND |
| 2016-03-09 | 909393 | 0.320 ppb |
| 2016-03-09 | 909392 | 0.360 ppb |
| 2016-03-09 | 909391 | 0.420 ppb |
| 2016-03-09 | 909390 | ND |
| 2016-06-08 | 925879 | 0.980 ppb |
| 2016-06-08 | 925878 | 1.000 ppb |
| 2016-06-08 | 925876 | 1.000 ppb |
| 2016-06-08 | 925877 | 1.10 ppb |
| 2016-09-14 | 945969 | 0.410 ppb |
| 2016-09-14 | 945970 | 0.820 ppb |
| 2016-09-14 | 945968 | 0.780 ppb |
| 2016-09-14 | 945971 | 0.630 ppb |
| 2016-12-14 | 966634 | 0.670 ppb |
| 2016-12-14 | 966633 | 0.790 ppb |
| 2016-12-14 | 966635 | 0.840 ppb |
| 2016-12-14 | 966632 | 0.840 ppb |
| 2017-03-08 | 976954 | 0.490 ppb |
| 2017-03-08 | 976951 | 0.320 ppb |
| 2017-03-08 | 976952 | 0.350 ppb |
| 2017-03-08 | 976953 | 0.410 ppb |
| 2017-06-14 | 997989 | 0.740 ppb |
| 2017-06-14 | 997991 | 0.780 ppb |
| 2017-06-14 | 997990 | 0.800 ppb |
| 2017-06-14 | 997988 | 0.980 ppb |
| 2017-09-13 | 1018197 | 1.000 ppb |
| 2017-09-13 | 1018200 | 0.970 ppb |
| 2017-09-13 | 1018199 | 0.960 ppb |
| 2017-09-13 | 1018198 | 0.940 ppb |
| 2017-12-13 | 1033476 | 0.710 ppb |
| 2017-12-13 | 1033479 | 0.640 ppb |
| 2017-12-13 | 1033477 | 0.580 ppb |
| 2017-12-13 | 1033478 | 0.530 ppb |
| 2018-03-14 | 1045313 | 1.50 ppb |
| 2018-03-14 | 1045311 | 1.50 ppb |
| 2018-03-14 | 1045310 | 1.30 ppb |
| 2018-03-14 | 1045312 | 1.30 ppb |
| 2018-06-13 | 1061445 | 0.980 ppb |
| 2018-06-13 | 1061442 | 1.10 ppb |
| 2018-06-13 | 1061444 | 1.000 ppb |
| 2018-06-13 | 1061443 | 0.980 ppb |
| 2018-09-12 | 1080062 | 0.800 ppb |
| 2018-09-12 | 1080061 | 0.900 ppb |
| 2018-09-12 | 1080064 | 0.820 ppb |
| 2018-09-12 | 1080063 | 0.870 ppb |
| 2018-12-12 | 1097493 | 0.920 ppb |
| 2018-12-12 | 1097495 | 0.780 ppb |
| 2018-12-12 | 1097496 | 0.760 ppb |
| 2018-12-12 | 1097494 | 0.810 ppb |
| 2019-03-13 | 1109554 | 0.320 ppb |
| 2019-03-13 | 1109553 | 0.340 ppb |
| 2019-03-13 | 1109551 | 0.380 ppb |
| 2019-03-13 | 1109552 | 0.510 ppb |
| 2019-06-12 | 1127632 | 0.940 ppb |
| 2019-06-12 | 1127630 | 0.930 ppb |
| 2019-06-12 | 1127631 | 0.850 ppb |
| 2019-06-12 | 1127629 | 0.420 ppb |
| 2019-09-11 | 1147352 | 0.280 ppb |
| 2019-09-11 | 1147351 | 0.310 ppb |
| 2019-09-11 | 1147353 | 0.360 ppb |
| 2019-09-11 | 1147354 | 0.360 ppb |
| 2019-12-11 | 1165286 | ND |
| 2019-12-11 | 1165284 | ND |
| 2019-12-11 | 1165287 | ND |
| 2019-12-11 | 1165285 | ND |