Trichloroacetic acid
Danbury Water Department
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 | 12.4 ppb | 37 | 37 | 0.600 ppb - 24.0 ppb |
2015 | N/A | 0 | 0 | N/A |
2016 | 10.9 ppb | 32 | 31 | ND - 22.0 ppb |
2017 | 12.4 ppb | 32 | 32 | 1.70 ppb - 23.0 ppb |
2018 | 10.6 ppb | 32 | 31 | ND - 16.0 ppb |
2019 | 8.75 ppb | 32 | 30 | ND - 25.4 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 |
---|---|---|
2014-01-06 | E401245-1CH | 19.0 ppb |
2014-01-06 | E401245-2CH | 1.10 ppb |
2014-03-11 | E403C94-2CH | 16.0 ppb |
2014-03-11 | E403C94-4CH | 8.60 ppb |
2014-03-11 | E403C94-7CH | 12.0 ppb |
2014-03-12 | E403C94-1CH | 15.0 ppb |
2014-03-13 | E403C94-6CH | 8.60 ppb |
2014-03-14 | E403C94-8CH | 13.0 ppb |
2014-03-17 | E403C94-3CH | 12.0 ppb |
2014-03-18 | E403C94-5CH | 5.90 ppb |
2014-06-10 | E406G56-4CH | 7.90 ppb |
2014-06-10 | E406G56-6CH | 24.0 ppb |
2014-06-11 | E406G56-1CH | 13.0 ppb |
2014-06-12 | E406G56-2CH | 15.0 ppb |
2014-06-12 | E406G56-7CH | 14.0 ppb |
2014-06-12 | E406G56-8CH | 18.0 ppb |
2014-06-13 | E406G56-5CH | 11.0 ppb |
2014-06-16 | E406G56-3CH | 13.0 ppb |
2014-09-10 | E409F66-1GE | 8.80 ppb |
2014-09-11 | E409F66-4GE | 1.20 ppb |
2014-09-11 | E409F66-6GE | 22.0 ppb |
2014-09-12 | E409F66-2GE | 21.0 ppb |
2014-09-12 | E409F66-8GE | 21.0 ppb |
2014-09-15 | E409F66-3GE | 22.0 ppb |
2014-09-23 | E409M19-1GE | 0.600 ppb |
2014-09-23 | E409M19-2GE | 12.0 ppb |
2014-09-23 | E409M19-3GE | 15.0 ppb |
2014-09-30 | E409T37-2GE | 9.60 ppb |
2014-09-30 | E410021-1GE | 13.0 ppb |
2014-12-12 | E412D88-1GE | 7.20 ppb |
2014-12-12 | E412D88-7GE | 9.40 ppb |
2014-12-12 | E412D88-8GE | 16.0 ppb |
2014-12-15 | E412D88-2GE | 8.50 ppb |
2014-12-15 | E412D88-3GE | 18.0 ppb |
2014-12-15 | E412D88-4GE | 1.90 ppb |
2014-12-15 | E412D88-6GE | 15.0 ppb |
2014-12-16 | E412D88-5GE | 8.30 ppb |
2016-03-09 | E603E03-4-18GE | 8.90 ppb |
2016-03-09 | E603E03-1-16GE | 0.570 ppb |
2016-03-10 | E603E03-2-17GE | 6.60 ppb |
2016-03-10 | E603E03-5-19GE | 7.90 ppb |
2016-03-10 | E603E03-6-20GE | 16.0 ppb |
2016-03-10 | E603E03-7-15GE | 11.0 ppb |
2016-03-11 | E603E03-8-04GE | 13.0 ppb |
2016-03-14 | E603E03-3-03GE | 18.0 ppb |
2016-06-16 | E606O13-1-16GE | 1.20 ppb |
2016-06-16 | E606O13-2-17GE | 13.0 ppb |
2016-06-16 | E606O13-8-04GE | 17.0 ppb |
2016-06-16 | E606O13-4-18GE | 0.790 ppb |
2016-06-16 | E606O13-5-19GE | 9.90 ppb |
2016-06-16 | E606O13-6-20GE | 22.0 ppb |
2016-06-20 | E606O13-7-15GE | 12.0 ppb |
2016-06-20 | E606O13-3-03GE | 12.0 ppb |
2016-09-08 | 188688CH | 10.4 ppb |
2016-09-09 | 188692CH | 11.3 ppb |
2016-09-13 | 188678CH | 2.10 ppb |
2016-09-13 | 188680CH | 9.50 ppb |
2016-09-13 | 188682CH | 9.70 ppb |
2016-09-13 | 188684CH | ND |
2016-09-13 | 188690CH | 10.2 ppb |
2016-09-14 | 188686CH | 7.80 ppb |
2016-12-12 | 192765CH | 18.0 ppb |
2016-12-13 | 192767CH | 16.0 ppb |
2016-12-13 | 192769CH | 19.0 ppb |
2016-12-13 | 192761CH | 9.00 ppb |
2016-12-13 | 192763CH | 10.00 ppb |
2016-12-13 | 192755CH | 18.0 ppb |
2016-12-13 | 192757CH | 10.00 ppb |
2016-12-14 | 192759CH | 17.0 ppb |
2017-03-09 | 196060GE | 21.0 ppb |
2017-03-09 | 196062GE | 15.0 ppb |
2017-03-09 | 196066GE | 6.40 ppb |
2017-03-13 | 196064GE | 16.0 ppb |
2017-03-14 | 196070GE | 13.0 ppb |
2017-03-15 | 196068GE | 7.70 ppb |
2017-03-15 | 196072GE | 12.0 ppb |
2017-03-15 | 196074GE | 16.0 ppb |
2017-06-13 | 200346GE | 2.20 ppb |
2017-06-13 | 200352GE | 14.0 ppb |
2017-06-14 | 200340GE | 18.0 ppb |
2017-06-14 | 200342GE | 15.0 ppb |
2017-06-14 | 200350GE | 23.0 ppb |
2017-06-15 | 200354GE | 21.0 ppb |
2017-06-15 | 200348GE | 12.0 ppb |
2017-06-15 | 200344GE | 15.0 ppb |
2017-09-12 | 204473GE | 5.60 ppb |
2017-09-12 | 204475GE | 10.00 ppb |
2017-09-12 | 204479GE | 1.70 ppb |
2017-09-12 | 204485GE | 13.0 ppb |
2017-09-12 | 204487GE | 12.0 ppb |
2017-09-13 | 204481GE | 8.90 ppb |
2017-09-13 | 204483GE | 10.00 ppb |
2017-09-13 | 204477GE | 12.0 ppb |
2017-12-11 | 208504GE | 18.0 ppb |
2017-12-11 | 208506GE | 3.70 ppb |
2017-12-12 | 208508GE | 6.60 ppb |
2017-12-12 | 208510GE | 17.0 ppb |
2017-12-12 | 208512GE | 13.0 ppb |
2017-12-12 | 208514GE | 16.0 ppb |
2017-12-12 | 208500GE | 15.0 ppb |
2017-12-12 | 208502GE | 8.40 ppb |
2018-03-14 | 211585GE | 14.0 ppb |
2018-03-14 | 211587GE | 9.10 ppb |
2018-03-14 | 211589GE | 12.0 ppb |
2018-03-14 | 211591GE | 9.20 ppb |
2018-03-14 | 211599GE | 13.0 ppb |
2018-03-15 | 211593GE | 8.00 ppb |
2018-03-15 | 211595GE | 15.0 ppb |
2018-03-15 | 211597GE | 11.0 ppb |
2018-06-19 | 215737GE | 15.0 ppb |
2018-06-19 | 215739GE | 11.9 ppb |
2018-06-19 | 215743GE | 2.00 ppb |
2018-06-19 | 215745GE | 11.0 ppb |
2018-06-19 | 215751GE | 12.3 ppb |
2018-06-20 | 215747GE | 15.2 ppb |
2018-06-20 | 215749GE | 11.1 ppb |
2018-06-20 | 215741GE | 10.4 ppb |
2018-09-14 | DBP 200505484 | 10.00 ppb |
2018-09-14 | DBP 200505486 | 13.7 ppb |
2018-09-14 | DBP 200505491 | 9.30 ppb |
2018-09-14 | DBP 200505493 | 13.2 ppb |
2018-09-14 | DBP 200505495 | 14.4 ppb |
2018-09-14 | DBP 200505497 | 10.3 ppb |
2018-09-14 | DBP 200505499 | 9.40 ppb |
2018-09-17 | DBP 200505658 | ND |
2018-12-14 | DBP 200516093 | 16.0 ppb |
2018-12-14 | DBP 200516094 | 6.40 ppb |
2018-12-14 | DBP 200516095 | 9.10 ppb |
2018-12-14 | DBP 200516096 | 1.50 ppb |
2018-12-14 | DBP 200516097 | 11.8 ppb |
2018-12-14 | DBP 200516098 | 9.10 ppb |
2018-12-14 | DBP 200516099 | 13.2 ppb |
2018-12-14 | DBP 200516100 | 12.9 ppb |
2019-03-14 | DBP 200524760 | 13.3 ppb |
2019-03-14 | DBP 200524761 | 6.90 ppb |
2019-03-14 | DBP 200524762 | 8.50 ppb |
2019-03-14 | DBP 200524763 | 9.80 ppb |
2019-03-14 | DBP 200524764 | 7.40 ppb |
2019-03-14 | DBP 200524765 | 13.5 ppb |
2019-03-14 | DBP 200524766 | 11.6 ppb |
2019-03-14 | DBP 200524767 | 9.80 ppb |
2019-06-20 | DBP 200537265 | 11.1 ppb |
2019-06-20 | DBP 200537266 | 7.90 ppb |
2019-06-20 | DBP 200537267 | 7.60 ppb |
2019-06-20 | DBP 200537268 | 1.10 ppb |
2019-06-20 | DBP 200537269 | 8.60 ppb |
2019-06-20 | DBP 200537270 | 13.2 ppb |
2019-06-20 | DBP 200537271 | 10.1 ppb |
2019-06-20 | DBP 200537272 | 9.60 ppb |
2019-09-19 | DBP 200549612 | ND |
2019-09-19 | DBP 200549613 | 25.4 ppb |
2019-09-19 | DBP 200549615 | ND |
2019-09-19 | DBP 200549617 | 9.70 ppb |
2019-09-19 | DBP 200549618 | 6.80 ppb |
2019-10-11 | DBP 200552503 | 10.5 ppb |
2019-10-11 | DBP 200552504 | 7.20 ppb |
2019-10-11 | DBP 200552505 | 8.80 ppb |
2019-12-19 | DBP 200560926 | 10.00 ppb |
2019-12-19 | DBP 200560927 | 5.80 ppb |
2019-12-19 | DBP 200560929 | 6.10 ppb |
2019-12-19 | DBP 200560930 | 11.0 ppb |
2019-12-19 | DBP 200560931 | 7.80 ppb |
2019-12-19 | DBP 200560932 | 5.50 ppb |
2019-12-19 | DBP 200560934 | 8.30 ppb |
2019-12-19 | DBP 200560935 | 7.10 ppb |