Trichloroacetic acid
City of Newton
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.291 ppb | 16 | 6 | ND - 1.10 ppb |
2015 | 0.351 ppb | 16 | 6 | ND - 1.50 ppb |
2016 | 0.633 ppb | 16 | 10 | ND - 1.80 ppb |
2017 | 0.629 ppb | 16 | 9 | ND - 1.60 ppb |
2018 | 0.255 ppb | 16 | 5 | ND - 1.30 ppb |
2019 | 0.306 ppb | 16 | 6 | ND - 1.10 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 |
---|---|---|
2014-02-10 | 60132 | ND |
2014-02-10 | 60050 | ND |
2014-02-10 | 60042 | ND |
2014-02-10 | 60035 | ND |
2014-05-05 | 109976 | ND |
2014-05-05 | 109975 | 0.510 ppb |
2014-05-05 | 109974 | ND |
2014-05-05 | 109973 | 0.640 ppb |
2014-08-18 | 175999 | 1.10 ppb |
2014-08-18 | 175998 | ND |
2014-08-18 | 176000 | 0.650 ppb |
2014-08-18 | 176001 | 0.650 ppb |
2014-11-17 | 233082 | 1.10 ppb |
2014-11-17 | 233081 | ND |
2014-11-17 | 233080 | ND |
2014-11-17 | 233079 | ND |
2015-02-23 | 284218 | ND |
2015-02-23 | 284217 | ND |
2015-02-23 | 284216 | ND |
2015-02-23 | 284215 | 0.500 ppb |
2015-05-18 | 334995 | ND |
2015-05-18 | 334996 | ND |
2015-05-18 | 334998 | ND |
2015-05-18 | 334997 | 0.820 ppb |
2015-08-18 | 390599 | ND |
2015-08-18 | 390597 | ND |
2015-08-18 | 390595 | 1.20 ppb |
2015-08-18 | 390589 | 0.950 ppb |
2015-11-17 | 428165 | 0.640 ppb |
2015-11-17 | 428164 | ND |
2015-11-17 | 428163 | ND |
2015-11-17 | 428162 | 1.50 ppb |
2016-02-22 | 497114 | 0.580 ppb |
2016-02-22 | 497113 | 0.910 ppb |
2016-02-22 | 497115 | ND |
2016-02-22 | 497116 | ND |
2016-05-23 | 551404 | 0.550 ppb |
2016-05-23 | 551403 | ND |
2016-05-23 | 551402 | 1.40 ppb |
2016-05-23 | 551401 | ND |
2016-08-22 | 607948 | ND |
2016-08-22 | 607947 | 0.800 ppb |
2016-08-22 | 607946 | 0.780 ppb |
2016-08-22 | 607945 | 1.30 ppb |
2016-11-07 | 656978 | ND |
2016-11-07 | 656981 | 1.80 ppb |
2016-11-07 | 656980 | 0.500 ppb |
2016-11-07 | 656979 | 1.50 ppb |
2017-02-13 | 708232 | ND |
2017-02-13 | 708231 | ND |
2017-02-13 | 708230 | 1.60 ppb |
2017-02-13 | 708229 | 0.820 ppb |
2017-05-23 | 766164 | 1.40 ppb |
2017-05-23 | 766163 | ND |
2017-05-23 | 766162 | ND |
2017-05-23 | 766161 | 0.690 ppb |
2017-08-29 | 829778 | 1.40 ppb |
2017-08-29 | 829777 | ND |
2017-08-29 | 829780 | 1.60 ppb |
2017-08-29 | 829781 | 0.720 ppb |
2017-11-14 | 878968 | 1.10 ppb |
2017-11-14 | 878967 | 0.730 ppb |
2017-11-14 | 878966 | ND |
2017-11-14 | 878965 | ND |
2018-02-12 | 908555 | ND |
2018-02-12 | 908554 | ND |
2018-02-12 | 908553 | 0.530 ppb |
2018-02-20 | 926774 | ND |
2018-05-21 | 974182 | ND |
2018-05-21 | 974183 | ND |
2018-05-21 | 974185 | ND |
2018-05-21 | 974184 | 0.520 ppb |
2018-08-13 | 1025161 | 1.10 ppb |
2018-08-13 | 1025160 | ND |
2018-08-13 | 1025159 | ND |
2018-08-13 | 1025158 | 1.30 ppb |
2018-11-13 | 1077378 | ND |
2018-11-13 | 1077377 | ND |
2018-11-13 | 1077376 | ND |
2018-11-13 | 1077375 | 0.630 ppb |
2019-02-04 | 1114511 | ND |
2019-02-04 | 1114510 | ND |
2019-02-04 | 1114512 | ND |
2019-02-04 | 1114513 | ND |
2019-05-20 | 1157986 | ND |
2019-05-20 | 1157985 | 0.760 ppb |
2019-05-20 | 1157984 | ND |
2019-05-20 | 1157983 | 0.630 ppb |
2019-08-13 | 1223238 | 0.850 ppb |
2019-08-13 | 1223237 | ND |
2019-08-13 | 1223236 | 1.10 ppb |
2019-08-13 | 1223235 | ND |
2019-11-04 | 1272052 | 0.700 ppb |
2019-11-04 | 1272055 | ND |
2019-11-04 | 1272054 | ND |
2019-11-04 | 1272053 | 0.860 ppb |