Trichloroacetic acid
Denver Water Board
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 | ND | 31 | 0 | ND |
2015 | ND | 8 | 0 | ND |
2016 | 5.39 ppb | 48 | 48 | 2.70 ppb - 8.70 ppb |
2017 | 4.22 ppb | 190 | 190 | 2.10 ppb - 7.80 ppb |
2018 | 3.95 ppb | 112 | 112 | 2.10 ppb - 9.30 ppb |
2019 | 4.85 ppb | 80 | 80 | 2.20 ppb - 9.90 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 | Result |
---|---|
2014-01-07 | ND |
2014-04-08 | ND |
2014-04-08 | ND |
2014-05-06 | ND |
2014-05-06 | ND |
2014-05-27 | ND |
2014-05-27 | ND |
2014-05-27 | ND |
2014-06-03 | ND |
2014-06-03 | ND |
2014-06-03 | ND |
2014-07-08 | ND |
2014-07-08 | ND |
2014-07-08 | ND |
2014-08-05 | ND |
2014-08-05 | ND |
2014-08-05 | ND |
2014-08-18 | ND |
2014-08-18 | ND |
2014-08-18 | ND |
2014-09-02 | ND |
2014-09-02 | ND |
2014-09-06 | ND |
2014-10-07 | ND |
2014-10-07 | ND |
2014-11-04 | ND |
2014-11-04 | ND |
2014-11-20 | ND |
2014-11-20 | ND |
2014-12-02 | ND |
2014-12-02 | ND |
2015-01-06 | ND |
2015-01-06 | ND |
2015-02-03 | ND |
2015-02-03 | ND |
2015-02-18 | ND |
2015-02-18 | ND |
2015-03-03 | ND |
2015-03-03 | ND |
2016-06-06 | 5.50 ppb |
2016-06-06 | 8.70 ppb |
2016-06-06 | 7.30 ppb |
2016-06-06 | 5.60 ppb |
2016-06-06 | 5.70 ppb |
2016-06-06 | 5.50 ppb |
2016-06-06 | 5.30 ppb |
2016-06-06 | 6.40 ppb |
2016-06-06 | 5.10 ppb |
2016-06-06 | 5.40 ppb |
2016-06-06 | 6.30 ppb |
2016-06-06 | 6.20 ppb |
2016-06-06 | 6.20 ppb |
2016-06-06 | 4.90 ppb |
2016-06-06 | 6.40 ppb |
2016-06-06 | 6.90 ppb |
2016-09-07 | 6.50 ppb |
2016-09-07 | 6.60 ppb |
2016-09-07 | 5.60 ppb |
2016-09-07 | 7.00 ppb |
2016-09-07 | 7.30 ppb |
2016-09-07 | 7.90 ppb |
2016-09-07 | 6.50 ppb |
2016-09-07 | 6.50 ppb |
2016-09-07 | 4.70 ppb |
2016-09-07 | 7.00 ppb |
2016-09-07 | 5.20 ppb |
2016-09-07 | 6.60 ppb |
2016-09-07 | 5.70 ppb |
2016-09-07 | 6.90 ppb |
2016-09-07 | 6.60 ppb |
2016-09-08 | 6.90 ppb |
2016-12-06 | 3.30 ppb |
2016-12-06 | 4.00 ppb |
2016-12-06 | 5.50 ppb |
2016-12-06 | 4.30 ppb |
2016-12-06 | 4.20 ppb |
2016-12-06 | 3.40 ppb |
2016-12-06 | 3.40 ppb |
2016-12-06 | 3.30 ppb |
2016-12-06 | 3.20 ppb |
2016-12-06 | 3.20 ppb |
2016-12-06 | 3.70 ppb |
2016-12-06 | 3.60 ppb |
2016-12-06 | 2.70 ppb |
2016-12-07 | 3.40 ppb |
2016-12-07 | 3.20 ppb |
2016-12-08 | 3.40 ppb |
2017-01-03 | 3.30 ppb |
2017-01-03 | 3.60 ppb |
2017-01-03 | 4.50 ppb |
2017-01-03 | 3.20 ppb |
2017-01-03 | 3.60 ppb |
2017-01-03 | 3.00 ppb |
2017-01-03 | 3.30 ppb |
2017-01-03 | 2.80 ppb |
2017-01-03 | 3.10 ppb |
2017-01-03 | 3.20 ppb |
2017-01-03 | 3.30 ppb |
2017-01-03 | 3.30 ppb |
2017-01-03 | 2.90 ppb |
2017-01-04 | 2.80 ppb |
2017-02-06 | 3.40 ppb |
2017-02-06 | 3.50 ppb |
2017-02-06 | 3.30 ppb |
2017-02-06 | 3.60 ppb |
2017-02-06 | 3.30 ppb |
2017-02-06 | 4.80 ppb |
2017-02-06 | 3.50 ppb |
2017-02-06 | 4.90 ppb |
2017-02-06 | 4.10 ppb |
2017-02-07 | 3.50 ppb |
2017-02-08 | 3.30 ppb |
2017-02-08 | 3.60 ppb |
2017-02-08 | 3.60 ppb |
2017-02-08 | 3.80 ppb |
2017-02-08 | 4.00 ppb |
2017-02-08 | 3.50 ppb |
2017-03-06 | 3.40 ppb |
2017-03-06 | 3.30 ppb |
2017-03-06 | 2.60 ppb |
2017-03-06 | 2.60 ppb |
2017-03-06 | 3.40 ppb |
2017-03-06 | 3.40 ppb |
2017-03-06 | 3.50 ppb |
2017-03-06 | 3.00 ppb |
2017-03-06 | 3.40 ppb |
2017-03-06 | 2.60 ppb |
2017-03-07 | 2.60 ppb |
2017-03-07 | 2.80 ppb |
2017-03-07 | 2.60 ppb |
2017-03-07 | 3.20 ppb |
2017-03-08 | 3.50 ppb |
2017-03-08 | 3.00 ppb |
2017-04-03 | 2.90 ppb |
2017-04-03 | 2.20 ppb |
2017-04-03 | 2.80 ppb |
2017-04-03 | 2.70 ppb |
2017-04-03 | 2.70 ppb |
2017-04-03 | 3.00 ppb |
2017-04-03 | 2.30 ppb |
2017-04-03 | 3.70 ppb |
2017-04-03 | 2.20 ppb |
2017-04-03 | 2.30 ppb |
2017-04-03 | 2.10 ppb |
2017-04-03 | 2.20 ppb |
2017-04-04 | 2.60 ppb |
2017-04-04 | 3.40 ppb |
2017-04-04 | 2.80 ppb |
2017-04-05 | 3.10 ppb |
2017-05-02 | 2.30 ppb |
2017-05-02 | 3.90 ppb |
2017-05-02 | 4.10 ppb |
2017-05-02 | 3.80 ppb |
2017-05-02 | 3.50 ppb |
2017-05-02 | 3.90 ppb |
2017-05-03 | 2.60 ppb |
2017-05-03 | 2.50 ppb |
2017-05-03 | 3.90 ppb |
2017-05-03 | 3.30 ppb |
2017-05-03 | 3.70 ppb |
2017-05-03 | 2.20 ppb |
2017-05-03 | 3.40 ppb |
2017-05-03 | 3.10 ppb |
2017-05-03 | 2.60 ppb |
2017-05-03 | 3.80 ppb |
2017-06-05 | 5.30 ppb |
2017-06-05 | 4.20 ppb |
2017-06-05 | 4.80 ppb |
2017-06-05 | 3.90 ppb |
2017-06-05 | 5.80 ppb |
2017-06-05 | 2.60 ppb |
2017-06-05 | 5.20 ppb |
2017-06-05 | 5.10 ppb |
2017-06-05 | 5.10 ppb |
2017-06-05 | 5.30 ppb |
2017-06-05 | 5.40 ppb |
2017-06-05 | 5.30 ppb |
2017-06-05 | 5.50 ppb |
2017-06-05 | 5.60 ppb |
2017-06-05 | 3.00 ppb |
2017-06-06 | 4.90 ppb |
2017-07-05 | 4.80 ppb |
2017-07-05 | 4.20 ppb |
2017-07-05 | 3.80 ppb |
2017-07-05 | 4.70 ppb |
2017-07-05 | 5.80 ppb |
2017-07-05 | 5.10 ppb |
2017-07-05 | 6.10 ppb |
2017-07-05 | 5.20 ppb |
2017-07-05 | 5.20 ppb |
2017-07-05 | 4.90 ppb |
2017-07-05 | 4.60 ppb |
2017-07-05 | 5.60 ppb |
2017-07-05 | 4.10 ppb |
2017-07-05 | 6.00 ppb |
2017-07-05 | 5.50 ppb |
2017-07-06 | 5.40 ppb |
2017-08-08 | 6.40 ppb |
2017-08-09 | 4.70 ppb |
2017-08-09 | 5.60 ppb |
2017-08-09 | 6.20 ppb |
2017-08-09 | 6.70 ppb |
2017-08-09 | 5.10 ppb |
2017-08-09 | 4.50 ppb |
2017-08-09 | 5.20 ppb |
2017-08-09 | 4.50 ppb |
2017-08-09 | 4.70 ppb |
2017-08-09 | 4.80 ppb |
2017-08-09 | 5.30 ppb |
2017-08-09 | 4.10 ppb |
2017-08-09 | 4.70 ppb |
2017-08-09 | 5.40 ppb |
2017-08-10 | 6.00 ppb |
2017-09-05 | 7.10 ppb |
2017-09-06 | 6.50 ppb |
2017-09-06 | 4.70 ppb |
2017-09-06 | 5.00 ppb |
2017-09-06 | 4.40 ppb |
2017-09-06 | 4.40 ppb |
2017-09-06 | 5.60 ppb |
2017-09-06 | 4.70 ppb |
2017-09-06 | 4.70 ppb |
2017-09-06 | 4.80 ppb |
2017-09-06 | 4.80 ppb |
2017-09-06 | 5.40 ppb |
2017-09-06 | 6.90 ppb |
2017-09-06 | 6.70 ppb |
2017-09-06 | 5.40 ppb |
2017-09-06 | 4.70 ppb |
2017-10-02 | 6.00 ppb |
2017-10-03 | 3.80 ppb |
2017-10-03 | 6.50 ppb |
2017-10-03 | 4.30 ppb |
2017-10-03 | 7.80 ppb |
2017-10-03 | 4.60 ppb |
2017-10-03 | 4.20 ppb |
2017-10-03 | 4.90 ppb |
2017-10-03 | 5.90 ppb |
2017-10-03 | 5.30 ppb |
2017-10-03 | 5.00 ppb |
2017-10-03 | 4.80 ppb |
2017-10-03 | 4.70 ppb |
2017-10-03 | 4.50 ppb |
2017-10-03 | 4.90 ppb |
2017-10-04 | 5.20 ppb |
2017-11-06 | 5.20 ppb |
2017-11-06 | 5.00 ppb |
2017-11-06 | 5.80 ppb |
2017-11-06 | 5.50 ppb |
2017-11-07 | 6.50 ppb |
2017-11-07 | 4.30 ppb |
2017-11-07 | 4.90 ppb |
2017-11-08 | 4.80 ppb |
2017-11-08 | 4.60 ppb |
2017-11-08 | 6.10 ppb |
2017-11-08 | 4.50 ppb |
2017-11-08 | 4.60 ppb |
2017-11-08 | 6.00 ppb |
2017-11-08 | 4.80 ppb |
2017-11-08 | 4.50 ppb |
2017-11-08 | 5.10 ppb |
2017-12-04 | 4.30 ppb |
2017-12-04 | 3.10 ppb |
2017-12-04 | 3.30 ppb |
2017-12-04 | 3.50 ppb |
2017-12-04 | 3.90 ppb |
2017-12-04 | 3.20 ppb |
2017-12-04 | 3.70 ppb |
2017-12-04 | 3.50 ppb |
2017-12-04 | 3.30 ppb |
2017-12-04 | 3.10 ppb |
2017-12-05 | 3.20 ppb |
2017-12-05 | 3.80 ppb |
2017-12-05 | 6.30 ppb |
2017-12-05 | 5.40 ppb |
2017-12-05 | 3.80 ppb |
2017-12-06 | 2.80 ppb |
2018-01-02 | 4.60 ppb |
2018-01-02 | 3.80 ppb |
2018-01-02 | 3.50 ppb |
2018-01-02 | 4.60 ppb |
2018-01-02 | 4.30 ppb |
2018-01-02 | 4.80 ppb |
2018-01-02 | 4.70 ppb |
2018-01-02 | 3.10 ppb |
2018-01-02 | 3.40 ppb |
2018-01-03 | 3.70 ppb |
2018-01-03 | 3.20 ppb |
2018-01-03 | 3.70 ppb |
2018-01-03 | 3.80 ppb |
2018-01-04 | 4.70 ppb |
2018-01-04 | 3.40 ppb |
2018-01-08 | 3.40 ppb |
2018-02-05 | 3.60 ppb |
2018-02-05 | 3.80 ppb |
2018-02-05 | 3.10 ppb |
2018-02-05 | 2.80 ppb |
2018-02-05 | 3.10 ppb |
2018-02-05 | 3.30 ppb |
2018-02-05 | 3.30 ppb |
2018-02-06 | 3.60 ppb |
2018-02-06 | 3.30 ppb |
2018-02-06 | 3.30 ppb |
2018-02-07 | 3.40 ppb |
2018-02-07 | 3.00 ppb |
2018-02-07 | 3.10 ppb |
2018-02-07 | 4.10 ppb |
2018-02-07 | 3.00 ppb |
2018-02-07 | 3.00 ppb |
2018-03-05 | 3.70 ppb |
2018-03-05 | 3.60 ppb |
2018-03-05 | 3.70 ppb |
2018-03-05 | 3.70 ppb |
2018-03-05 | 3.90 ppb |
2018-03-05 | 3.70 ppb |
2018-03-05 | 3.60 ppb |
2018-03-05 | 3.40 ppb |
2018-03-05 | 3.70 ppb |
2018-03-05 | 4.10 ppb |
2018-03-05 | 3.60 ppb |
2018-03-05 | 3.70 ppb |
2018-03-05 | 4.00 ppb |
2018-03-06 | 3.70 ppb |
2018-03-06 | 3.50 ppb |
2018-03-07 | 3.90 ppb |
2018-04-02 | 3.50 ppb |
2018-04-02 | 3.60 ppb |
2018-04-03 | 3.80 ppb |
2018-04-03 | 3.70 ppb |
2018-04-03 | 3.60 ppb |
2018-04-03 | 4.10 ppb |
2018-04-03 | 3.50 ppb |
2018-04-03 | 3.90 ppb |
2018-04-03 | 3.70 ppb |
2018-04-03 | 4.20 ppb |
2018-04-04 | 3.80 ppb |
2018-04-04 | 4.30 ppb |
2018-04-04 | 3.50 ppb |
2018-04-04 | 3.60 ppb |
2018-04-04 | 4.40 ppb |
2018-04-04 | 3.60 ppb |
2018-06-04 | 3.90 ppb |
2018-06-04 | 3.40 ppb |
2018-06-04 | 4.00 ppb |
2018-06-04 | 4.00 ppb |
2018-06-04 | 4.40 ppb |
2018-06-04 | 4.40 ppb |
2018-06-04 | 3.80 ppb |
2018-06-04 | 4.40 ppb |
2018-06-04 | 4.30 ppb |
2018-06-04 | 4.10 ppb |
2018-06-04 | 4.20 ppb |
2018-06-04 | 3.80 ppb |
2018-06-04 | 3.90 ppb |
2018-06-04 | 4.70 ppb |
2018-06-04 | 3.00 ppb |
2018-06-05 | 4.20 ppb |
2018-09-04 | 4.90 ppb |
2018-09-05 | 5.50 ppb |
2018-09-05 | 5.70 ppb |
2018-09-05 | 4.80 ppb |
2018-09-05 | 5.20 ppb |
2018-09-05 | 4.80 ppb |
2018-09-05 | 4.30 ppb |
2018-09-05 | 9.30 ppb |
2018-09-05 | 4.70 ppb |
2018-09-05 | 5.70 ppb |
2018-09-05 | 4.00 ppb |
2018-09-05 | 5.00 ppb |
2018-09-05 | 4.10 ppb |
2018-09-05 | 5.00 ppb |
2018-09-05 | 4.00 ppb |
2018-09-06 | 5.40 ppb |
2018-12-04 | 6.80 ppb |
2018-12-04 | 6.00 ppb |
2018-12-04 | 2.30 ppb |
2018-12-04 | 2.10 ppb |
2018-12-04 | 2.40 ppb |
2018-12-04 | 2.20 ppb |
2018-12-04 | 2.40 ppb |
2018-12-04 | 4.60 ppb |
2018-12-04 | 6.50 ppb |
2018-12-04 | 7.70 ppb |
2018-12-04 | 4.40 ppb |
2018-12-04 | 2.70 ppb |
2018-12-04 | 2.30 ppb |
2018-12-04 | 2.60 ppb |
2018-12-04 | 2.40 ppb |
2018-12-05 | 2.70 ppb |
2019-03-04 | 5.00 ppb |
2019-03-04 | 2.80 ppb |
2019-03-04 | 3.50 ppb |
2019-03-04 | 2.50 ppb |
2019-03-04 | 6.30 ppb |
2019-03-04 | 2.40 ppb |
2019-03-04 | 2.70 ppb |
2019-03-05 | 2.80 ppb |
2019-03-05 | 2.60 ppb |
2019-03-05 | 2.80 ppb |
2019-03-05 | 2.20 ppb |
2019-03-05 | 2.60 ppb |
2019-03-05 | 2.70 ppb |
2019-03-05 | 2.70 ppb |
2019-03-05 | 2.20 ppb |
2019-03-05 | 5.90 ppb |
2019-06-03 | 2.20 ppb |
2019-06-03 | 4.10 ppb |
2019-06-03 | 5.40 ppb |
2019-06-03 | 3.40 ppb |
2019-06-03 | 5.10 ppb |
2019-06-03 | 4.20 ppb |
2019-06-03 | 3.20 ppb |
2019-06-05 | 3.30 ppb |
2019-06-05 | 4.50 ppb |
2019-06-05 | 3.90 ppb |
2019-06-05 | 3.70 ppb |
2019-06-05 | 4.50 ppb |
2019-06-05 | 3.50 ppb |
2019-06-05 | 4.10 ppb |
2019-06-05 | 3.60 ppb |
2019-06-05 | 4.90 ppb |
2019-07-09 | 4.93 ppb |
2019-07-09 | 4.72 ppb |
2019-07-09 | 4.99 ppb |
2019-07-09 | 5.86 ppb |
2019-07-09 | 5.59 ppb |
2019-07-09 | 5.55 ppb |
2019-07-10 | 5.85 ppb |
2019-07-10 | 5.96 ppb |
2019-07-10 | 7.83 ppb |
2019-07-10 | 5.95 ppb |
2019-07-10 | 3.88 ppb |
2019-07-10 | 5.89 ppb |
2019-07-10 | 6.29 ppb |
2019-07-10 | 6.23 ppb |
2019-07-10 | 5.51 ppb |
2019-07-10 | 5.61 ppb |
2019-09-10 | 5.20 ppb |
2019-09-11 | 3.90 ppb |
2019-09-11 | 4.50 ppb |
2019-09-11 | 4.60 ppb |
2019-09-11 | 4.60 ppb |
2019-09-11 | 5.10 ppb |
2019-09-11 | 5.00 ppb |
2019-09-11 | 4.80 ppb |
2019-09-11 | 4.80 ppb |
2019-09-11 | 4.60 ppb |
2019-09-11 | 6.00 ppb |
2019-09-11 | 9.90 ppb |
2019-09-11 | 4.60 ppb |
2019-09-11 | 7.20 ppb |
2019-09-11 | 4.20 ppb |
2019-09-11 | 4.60 ppb |
2019-12-02 | 5.00 ppb |
2019-12-02 | 5.60 ppb |
2019-12-02 | 5.40 ppb |
2019-12-02 | 5.00 ppb |
2019-12-03 | 6.70 ppb |
2019-12-03 | 5.60 ppb |
2019-12-04 | 4.90 ppb |
2019-12-04 | 5.40 ppb |
2019-12-04 | 7.30 ppb |
2019-12-04 | 7.70 ppb |
2019-12-04 | 8.30 ppb |
2019-12-04 | 5.40 ppb |
2019-12-04 | 4.70 ppb |
2019-12-04 | 9.00 ppb |
2019-12-05 | 7.70 ppb |
2019-12-05 | 4.70 ppb |