Trichloroacetic acid
Iola, City of
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 | 1.35 ppb | 8 | 8 | 0.560 ppb - 2.70 ppb |
2015 | 2.05 ppb | 8 | 8 | 1.20 ppb - 3.80 ppb |
2016 | 1.54 ppb | 8 | 8 | 0.840 ppb - 2.30 ppb |
2017 | 0.939 ppb | 8 | 6 | ND - 2.30 ppb |
2018 | 0.801 ppb | 8 | 8 | 0.610 ppb - 1.10 ppb |
2019 | 1.31 ppb | 8 | 8 | 0.640 ppb - 1.70 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 | 59952 | 0.560 ppb |
2014-02-10 | 59949 | 0.740 ppb |
2014-05-05 | 109830 | 2.50 ppb |
2014-05-05 | 109829 | 2.70 ppb |
2014-08-11 | 171603 | 1.40 ppb |
2014-08-11 | 171602 | 0.960 ppb |
2014-11-18 | 233056 | 1.20 ppb |
2014-11-18 | 233055 | 0.720 ppb |
2015-02-09 | 277047 | 1.90 ppb |
2015-02-09 | 277046 | 1.20 ppb |
2015-05-11 | 331770 | 2.40 ppb |
2015-05-11 | 331771 | 1.80 ppb |
2015-08-10 | 382959 | 1.30 ppb |
2015-08-10 | 382958 | 1.30 ppb |
2015-11-30 | 428049 | 2.70 ppb |
2015-11-30 | 428048 | 3.80 ppb |
2016-02-08 | 490672 | 2.10 ppb |
2016-02-09 | 490673 | 2.30 ppb |
2016-05-09 | 543915 | 1.10 ppb |
2016-05-09 | 543914 | 1.30 ppb |
2016-08-08 | 599866 | 1.70 ppb |
2016-08-08 | 599865 | 2.00 ppb |
2016-11-07 | 656751 | 0.950 ppb |
2016-11-07 | 656752 | 0.840 ppb |
2017-02-06 | 704754 | ND |
2017-02-06 | 704753 | ND |
2017-05-22 | 765616 | 1.000 ppb |
2017-05-22 | 765615 | 1.000 ppb |
2017-08-23 | 824930 | 0.820 ppb |
2017-08-23 | 824929 | 0.690 ppb |
2017-11-13 | 877913 | 1.70 ppb |
2017-11-13 | 877912 | 2.30 ppb |
2018-02-12 | 908047 | 0.680 ppb |
2018-02-12 | 908046 | 0.740 ppb |
2018-05-14 | 970875 | 0.640 ppb |
2018-05-14 | 970876 | 0.610 ppb |
2018-08-13 | 1025340 | 0.970 ppb |
2018-08-13 | 1025339 | 0.790 ppb |
2018-11-12 | 1076314 | 0.880 ppb |
2018-11-12 | 1076313 | 1.10 ppb |
2019-02-04 | 1114340 | 1.10 ppb |
2019-02-04 | 1114339 | 1.10 ppb |
2019-05-06 | 1157779 | 1.70 ppb |
2019-05-06 | 1157778 | 1.20 ppb |
2019-08-05 | 1215887 | 1.60 ppb |
2019-08-05 | 1215886 | 1.60 ppb |
2019-11-04 | 1268775 | 0.640 ppb |
2019-11-04 | 1268776 | 1.50 ppb |