Trichloroacetic acid
CTWC - Unionville 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 14.1 ppb | 23 | 20 | ND - 26.0 ppb |
2015 | N/A | 0 | 0 | N/A |
2016 | 11.1 ppb | 16 | 15 | ND - 19.0 ppb |
2017 | 9.11 ppb | 16 | 15 | ND - 19.0 ppb |
2018 | 22.1 ppb | 16 | 16 | 16.0 ppb - 25.7 ppb |
2019 | 19.5 ppb | 16 | 16 | 2.80 ppb - 32.2 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 |
---|---|---|
2014-01-22 | BG02299HAA5 | 3.70 ppb |
2014-01-23 | BG02294HAA5 | ND |
2014-01-23 | BG02295HAA5 | 19.0 ppb |
2014-01-23 | BG02296HAA5 | ND |
2014-01-23 | BG02297HAA5 | 17.0 ppb |
2014-01-23 | BG02298HAA5 | ND |
2014-01-23 | BG02300HAA5 | 2.10 ppb |
2014-01-31 | BG06718HAA5 | 25.0 ppb |
2014-01-31 | BG06717HAA5 | 13.0 ppb |
2014-01-31 | BG06716HAA5 | 26.0 ppb |
2014-01-31 | BG06715HAA5 | 20.0 ppb |
2014-04-22 | BG36625HAA5 | 16.0 ppb |
2014-04-22 | BG36626HAA5 | 16.0 ppb |
2014-04-22 | BG36627HAA5 | 17.0 ppb |
2014-04-22 | BG36628HAA5 | 19.0 ppb |
2014-07-22 | BG81008HAA5 | 20.0 ppb |
2014-07-22 | BG81009HAA5 | 20.0 ppb |
2014-07-22 | BG81010HAA5 | 20.0 ppb |
2014-07-22 | BG81011HAA5 | 20.0 ppb |
2014-10-22 | BH31461HAA5 | 14.0 ppb |
2014-10-22 | BH31460HAA5 | 12.0 ppb |
2014-10-22 | BH31459HAA5 | 14.0 ppb |
2014-10-22 | BH31458HAA5 | 10.00 ppb |
2016-01-11 | BK51264HAA5 | 11.0 ppb |
2016-01-11 | BK51265HAA5 | 14.0 ppb |
2016-01-11 | BK51263HAA5 | 11.0 ppb |
2016-01-18 | BK54312HAA5 | 2.90 ppb |
2016-04-18 | BN15772HAA5 | 15.0 ppb |
2016-04-18 | BN15773HAA5 | 16.0 ppb |
2016-04-18 | BN15774HAA5 | 14.0 ppb |
2016-04-18 | BN15775HAA5 | 9.00 ppb |
2016-07-12 | BN71240HAA5 | 19.0 ppb |
2016-07-12 | BN71241HAA5 | ND |
2016-07-13 | BN72150HAA5 | 19.0 ppb |
2016-07-13 | BN72151HAA5 | 13.0 ppb |
2016-10-04 | BV35900HAA5 | 2.70 ppb |
2016-10-04 | BV35901HAA5 | 8.70 ppb |
2016-10-04 | BV35905HAA5 | 11.0 ppb |
2016-10-11 | BV44240HAA5 | 12.0 ppb |
2017-01-17 | BX30317HAA5 | 9.50 ppb |
2017-01-17 | BX30318HAA5 | 8.10 ppb |
2017-01-17 | BX30319HAA5 | 9.20 ppb |
2017-01-17 | BX30320HAA5 | 9.70 ppb |
2017-04-11 | BY02322HAA5 | 13.0 ppb |
2017-04-11 | BY02319HAA5 | 9.10 ppb |
2017-04-11 | BY02320HAA5 | 6.00 ppb |
2017-04-11 | BY02321HAA5 | 11.0 ppb |
2017-07-18 | BY63323HAA5 | 15.0 ppb |
2017-07-18 | BY63324HAA5 | ND |
2017-07-18 | BY63325HAA5 | 19.0 ppb |
2017-07-18 | BY63326HAA5 | 18.0 ppb |
2017-10-24 | BZ26033HAA5 | 1.30 ppb |
2017-10-24 | BZ26034HAA5 | 2.50 ppb |
2017-10-24 | BZ26035HAA5 | 13.0 ppb |
2017-10-24 | BZ26036HAA5 | 1.40 ppb |
2018-01-16 | BZ73286HAA5 | 21.0 ppb |
2018-01-16 | BZ73289HAA5 | 25.0 ppb |
2018-01-16 | BZ73288HAA5 | 22.0 ppb |
2018-01-16 | BZ73287HAA5 | 19.0 ppb |
2018-04-27 | CA37381HAA5 | 20.0 ppb |
2018-04-27 | CA37382HAA5 | 22.0 ppb |
2018-04-27 | CA37383HAA5 | 24.0 ppb |
2018-04-27 | CA37384HAA5 | 23.0 ppb |
2018-07-24 | CA96737 | 16.0 ppb |
2018-07-24 | CA96736 | 25.0 ppb |
2018-07-24 | CA96734 | 22.0 ppb |
2018-07-24 | CA96735 | 21.0 ppb |
2018-10-02 | DBP 200507665 | 24.6 ppb |
2018-10-02 | DBP 200507666 | 17.8 ppb |
2018-10-02 | DBP 200507667 | 25.1 ppb |
2018-10-02 | DBP 200508020 | 25.7 ppb |
2019-01-08 | DBP 200518130 | 28.0 ppb |
2019-01-08 | DBP 200518136 | 15.1 ppb |
2019-01-08 | DBP 200518139 | 27.2 ppb |
2019-01-08 | DBP 200518143 | 32.2 ppb |
2019-04-09 | DBP 200527847 | 2.80 ppb |
2019-04-09 | DBP 200527849 | 3.50 ppb |
2019-04-09 | DBP 200527848 | 28.8 ppb |
2019-04-09 | DBP 200527846 | 4.10 ppb |
2019-07-02 | DBP 200538986 | 25.4 ppb |
2019-07-02 | DBP 200538987 | 24.4 ppb |
2019-07-02 | DBP 200538988 | 24.3 ppb |
2019-07-02 | DBP 200538989 | 24.0 ppb |
2019-10-08 | DBP 200552012 | 20.2 ppb |
2019-10-08 | DBP 200552013 | 17.5 ppb |
2019-10-08 | DBP 200552014 | 17.0 ppb |
2019-10-08 | DBP 200552015 | 17.5 ppb |