Trichloroacetic acid
Clay WDS
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 4.58 ppb | 16 | 13 | ND - 20.0 ppb |
| 2015 | 4.88 ppb | 16 | 14 | ND - 11.0 ppb |
| 2016 | 4.39 ppb | 16 | 13 | ND - 19.0 ppb |
| 2017 | 7.00 ppb | 16 | 16 | 2.50 ppb - 16.0 ppb |
| 2018 | 5.01 ppb | 16 | 15 | ND - 15.0 ppb |
| 2019 | 7.59 ppb | 16 | 16 | 3.20 ppb - 16.0 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 | 1Q2014 SHOREVIEW | 3.50 ppb |
| 2014-02-10 | 1Q2014 FOSTER RD | 1.90 ppb |
| 2014-02-10 | 1Q2014 CROSSROAD | ND |
| 2014-02-10 | 1Q2014 MOYERS CO | 4.40 ppb |
| 2014-05-21 | 2Q2014 FOSTER RD | 3.70 ppb |
| 2014-05-21 | 2Q2014 CROSSROAD | ND |
| 2014-05-21 | 2Q2014 MOYERS CO | 8.30 ppb |
| 2014-05-21 | 2Q2014 SHOREVIEW | 5.20 ppb |
| 2014-08-20 | 3Q2014 SHOREVIEW | 3.10 ppb |
| 2014-08-20 | 3Q2014 FOSTER RD | 4.70 ppb |
| 2014-08-20 | 3Q2014 MOYERS CO | 3.20 ppb |
| 2014-08-20 | 3Q2014 CROSSROAD | ND |
| 2014-12-26 | 4Q2014 MOYERS CO | 5.30 ppb |
| 2014-12-26 | 4Q2014 CROSSROAD | 20.0 ppb |
| 2014-12-26 | 4Q2014 SHOREVIEW | 8.40 ppb |
| 2014-12-26 | 4Q2014 FOSTER RD | 1.60 ppb |
| 2015-03-03 | 1Q2015 CROSSROAD | 1.60 ppb |
| 2015-03-03 | 1Q2015 FOSTER RD | 11.0 ppb |
| 2015-03-03 | 1Q2015 MOYERS CO | 6.40 ppb |
| 2015-03-03 | 1Q2015 SHOREVIEW | 5.00 ppb |
| 2015-06-15 | 2Q2015 FOSTER RD | 7.40 ppb |
| 2015-06-15 | 2Q2015 CROSSROAD | ND |
| 2015-06-15 | 2Q2015 MOYERS CO | 6.50 ppb |
| 2015-06-15 | 2Q2015 SHOREVIEW | 4.80 ppb |
| 2015-09-02 | 3Q2015 CROSSROAD | 2.90 ppb |
| 2015-09-02 | 3Q2015 MOYERS CO | 7.50 ppb |
| 2015-09-02 | 3Q2015 FOSTER RD | 8.40 ppb |
| 2015-09-02 | 3Q2015 SHOREVIEW | 4.50 ppb |
| 2015-12-02 | 4Q2015 CROSSROAD | ND |
| 2015-12-02 | 4Q2015 FOSTER RD | 2.50 ppb |
| 2015-12-02 | 4Q2015 MOYERS CO | 4.70 ppb |
| 2015-12-02 | 4Q2015 SHOREVIEW | 4.80 ppb |
| 2016-03-02 | 1Q2016 CROSSROAD | ND |
| 2016-03-02 | 1Q2016 MOYERS CO | 6.30 ppb |
| 2016-03-02 | 1Q2016 FOSTER RD | 2.50 ppb |
| 2016-03-02 | 1Q2016 SHOREVIEW | 5.10 ppb |
| 2016-06-01 | 2Q2016 MOYERS CO | 4.20 ppb |
| 2016-06-01 | 2Q2016 FOSTER RD | 5.20 ppb |
| 2016-06-01 | 2Q2016 SHOREVIEW | 3.20 ppb |
| 2016-06-01 | 2Q2016 CROSSROAD | ND |
| 2016-09-07 | 3Q2016 FOSTER RD | 5.00 ppb |
| 2016-09-07 | 3Q2016 CROSSROAD | ND |
| 2016-09-07 | 3Q2016 SHOREVIEW | 3.20 ppb |
| 2016-09-07 | 3Q2016 MOYERS CO | 4.40 ppb |
| 2016-12-07 | 4Q2016 CROSSROAD | 19.0 ppb |
| 2016-12-07 | 4Q2016 SHOREVIEW | 3.80 ppb |
| 2016-12-07 | 4Q2016 FOSTER RD | 4.90 ppb |
| 2016-12-07 | 4Q2016 MOYERS CO | 3.50 ppb |
| 2017-03-01 | 1Q2017 FOSTER RD | 7.10 ppb |
| 2017-03-01 | 1Q2017 CROSSROAD | 16.0 ppb |
| 2017-03-01 | 1Q2017 SHOREVIEW | 5.60 ppb |
| 2017-03-01 | 1Q2017 MOYERS CO | 5.60 ppb |
| 2017-06-07 | 2Q2017 FOSTER RD | 12.0 ppb |
| 2017-06-07 | 2Q2017 CROSSROAD | 7.10 ppb |
| 2017-06-07 | 2Q2017 SHOREVIEW | 6.70 ppb |
| 2017-06-07 | 2Q2017 MOYERS CO | 8.20 ppb |
| 2017-09-20 | 3Q2017 FOSTER RD | 6.50 ppb |
| 2017-09-20 | 3Q2017 CROSSROAD | 3.80 ppb |
| 2017-09-20 | 3Q2017 SHOREVIEW | 4.30 ppb |
| 2017-09-20 | 3Q2017 MOYERS CO | 5.30 ppb |
| 2017-12-06 | 4Q2017 MOYERS CO | 3.30 ppb |
| 2017-12-06 | 4Q2017 FOSTER RD | 2.50 ppb |
| 2017-12-06 | 4Q2017 CROSSROAD | 15.0 ppb |
| 2017-12-06 | 4Q2017 SHOREVIEW | 3.00 ppb |
| 2018-03-07 | 1Q2018 CROSSROAD | 15.0 ppb |
| 2018-03-07 | 1Q2018 MOYERS CO | 6.30 ppb |
| 2018-03-07 | 1Q2018 SHOREVIEW | 5.70 ppb |
| 2018-03-07 | 1Q2018 FOSTER RD | 1.60 ppb |
| 2018-06-06 | 2Q2018 MOYERS CO | 2.30 ppb |
| 2018-06-06 | 2Q2018 CROSSROAD | ND |
| 2018-06-06 | 2Q2018 SHOREVIEW | 2.00 ppb |
| 2018-06-06 | 2Q2018 FOSTER RD | 4.50 ppb |
| 2018-09-05 | 3Q2018 FOSTER RD | 3.20 ppb |
| 2018-09-05 | 3Q2018 CROSSROAD | 9.20 ppb |
| 2018-09-05 | 3Q2018 SHOREVIEW | 3.90 ppb |
| 2018-09-07 | 3Q2018 MOYERS CO | 4.10 ppb |
| 2018-12-05 | 4Q2018 MOYERS CO | 4.00 ppb |
| 2018-12-05 | 4Q2018 CROSSROAD | 10.00 ppb |
| 2018-12-05 | 4Q2018 FOSTER RD | 5.30 ppb |
| 2018-12-05 | 4Q2018 SHOREVIEW | 3.10 ppb |
| 2019-03-06 | 1Q2019 CROSSROAD | 16.0 ppb |
| 2019-03-06 | 1Q2019 FOSTER RD | 7.10 ppb |
| 2019-03-06 | 1Q2019 SHOREVIEW | 6.20 ppb |
| 2019-03-06 | 1Q2019 MOYERS CO | 8.80 ppb |
| 2019-06-05 | 2Q2019 MOYERS CO | 4.40 ppb |
| 2019-06-05 | 2Q2019 FOSTER RD | 5.50 ppb |
| 2019-06-05 | 2Q2019 CROSSROAD | 7.50 ppb |
| 2019-06-05 | 2Q2019 SHOREVIEW | 4.20 ppb |
| 2019-09-04 | 3Q2019 SHOREVIEW | 3.20 ppb |
| 2019-09-04 | 3Q2019 CROSSROAD | 7.50 ppb |
| 2019-09-04 | 3Q2019 FOSTER RD | 5.20 ppb |
| 2019-09-04 | 3Q2019 MOYERS CO | 4.50 ppb |
| 2019-12-04 | 4Q2019 FOSTER RD | 6.60 ppb |
| 2019-12-04 | 4Q2019 SHOREVIEW | 15.0 ppb |
| 2019-12-04 | 4Q2019 MOYERS CO | 4.80 ppb |
| 2019-12-04 | 4Q2019 CROSSROAD | 15.0 ppb |