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EWG's Tap Water Database — 2021 UPDATE

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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.

MORE ABOUT THIS CONTAMINANT

 

165

Samples

0

Samples exceeding legal limit (MCL)

161

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201412.4 ppb37370.600 ppb - 24.0 ppb
2015N/A00N/A
201610.9 ppb3231ND - 22.0 ppb
201712.4 ppb32321.70 ppb - 23.0 ppb
201810.6 ppb3231ND - 16.0 ppb
20198.75 ppb3230ND - 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
2014-01-06E401245-1CH19.0 ppb
2014-01-06E401245-2CH1.10 ppb
2014-03-11E403C94-2CH16.0 ppb
2014-03-11E403C94-4CH8.60 ppb
2014-03-11E403C94-7CH12.0 ppb
2014-03-12E403C94-1CH15.0 ppb
2014-03-13E403C94-6CH8.60 ppb
2014-03-14E403C94-8CH13.0 ppb
2014-03-17E403C94-3CH12.0 ppb
2014-03-18E403C94-5CH5.90 ppb
2014-06-10E406G56-4CH7.90 ppb
2014-06-10E406G56-6CH24.0 ppb
2014-06-11E406G56-1CH13.0 ppb
2014-06-12E406G56-2CH15.0 ppb
2014-06-12E406G56-7CH14.0 ppb
2014-06-12E406G56-8CH18.0 ppb
2014-06-13E406G56-5CH11.0 ppb
2014-06-16E406G56-3CH13.0 ppb
2014-09-10E409F66-1GE8.80 ppb
2014-09-11E409F66-4GE1.20 ppb
2014-09-11E409F66-6GE22.0 ppb
2014-09-12E409F66-2GE21.0 ppb
2014-09-12E409F66-8GE21.0 ppb
2014-09-15E409F66-3GE22.0 ppb
2014-09-23E409M19-1GE0.600 ppb
2014-09-23E409M19-2GE12.0 ppb
2014-09-23E409M19-3GE15.0 ppb
2014-09-30E409T37-2GE9.60 ppb
2014-09-30E410021-1GE13.0 ppb
2014-12-12E412D88-1GE7.20 ppb
2014-12-12E412D88-7GE9.40 ppb
2014-12-12E412D88-8GE16.0 ppb
2014-12-15E412D88-2GE8.50 ppb
2014-12-15E412D88-3GE18.0 ppb
2014-12-15E412D88-4GE1.90 ppb
2014-12-15E412D88-6GE15.0 ppb
2014-12-16E412D88-5GE8.30 ppb
2016-03-09E603E03-4-18GE8.90 ppb
2016-03-09E603E03-1-16GE0.570 ppb
2016-03-10E603E03-2-17GE6.60 ppb
2016-03-10E603E03-5-19GE7.90 ppb
2016-03-10E603E03-6-20GE16.0 ppb
2016-03-10E603E03-7-15GE11.0 ppb
2016-03-11E603E03-8-04GE13.0 ppb
2016-03-14E603E03-3-03GE18.0 ppb
2016-06-16E606O13-1-16GE1.20 ppb
2016-06-16E606O13-2-17GE13.0 ppb
2016-06-16E606O13-8-04GE17.0 ppb
2016-06-16E606O13-4-18GE0.790 ppb
2016-06-16E606O13-5-19GE9.90 ppb
2016-06-16E606O13-6-20GE22.0 ppb
2016-06-20E606O13-7-15GE12.0 ppb
2016-06-20E606O13-3-03GE12.0 ppb
2016-09-08188688CH10.4 ppb
2016-09-09188692CH11.3 ppb
2016-09-13188678CH2.10 ppb
2016-09-13188680CH9.50 ppb
2016-09-13188682CH9.70 ppb
2016-09-13188684CHND
2016-09-13188690CH10.2 ppb
2016-09-14188686CH7.80 ppb
2016-12-12192765CH18.0 ppb
2016-12-13192767CH16.0 ppb
2016-12-13192769CH19.0 ppb
2016-12-13192761CH9.00 ppb
2016-12-13192763CH10.00 ppb
2016-12-13192755CH18.0 ppb
2016-12-13192757CH10.00 ppb
2016-12-14192759CH17.0 ppb
2017-03-09196060GE21.0 ppb
2017-03-09196062GE15.0 ppb
2017-03-09196066GE6.40 ppb
2017-03-13196064GE16.0 ppb
2017-03-14196070GE13.0 ppb
2017-03-15196068GE7.70 ppb
2017-03-15196072GE12.0 ppb
2017-03-15196074GE16.0 ppb
2017-06-13200346GE2.20 ppb
2017-06-13200352GE14.0 ppb
2017-06-14200340GE18.0 ppb
2017-06-14200342GE15.0 ppb
2017-06-14200350GE23.0 ppb
2017-06-15200354GE21.0 ppb
2017-06-15200348GE12.0 ppb
2017-06-15200344GE15.0 ppb
2017-09-12204473GE5.60 ppb
2017-09-12204475GE10.00 ppb
2017-09-12204479GE1.70 ppb
2017-09-12204485GE13.0 ppb
2017-09-12204487GE12.0 ppb
2017-09-13204481GE8.90 ppb
2017-09-13204483GE10.00 ppb
2017-09-13204477GE12.0 ppb
2017-12-11208504GE18.0 ppb
2017-12-11208506GE3.70 ppb
2017-12-12208508GE6.60 ppb
2017-12-12208510GE17.0 ppb
2017-12-12208512GE13.0 ppb
2017-12-12208514GE16.0 ppb
2017-12-12208500GE15.0 ppb
2017-12-12208502GE8.40 ppb
2018-03-14211585GE14.0 ppb
2018-03-14211587GE9.10 ppb
2018-03-14211589GE12.0 ppb
2018-03-14211591GE9.20 ppb
2018-03-14211599GE13.0 ppb
2018-03-15211593GE8.00 ppb
2018-03-15211595GE15.0 ppb
2018-03-15211597GE11.0 ppb
2018-06-19215737GE15.0 ppb
2018-06-19215739GE11.9 ppb
2018-06-19215743GE2.00 ppb
2018-06-19215745GE11.0 ppb
2018-06-19215751GE12.3 ppb
2018-06-20215747GE15.2 ppb
2018-06-20215749GE11.1 ppb
2018-06-20215741GE10.4 ppb
2018-09-14DBP 20050548410.00 ppb
2018-09-14DBP 20050548613.7 ppb
2018-09-14DBP 2005054919.30 ppb
2018-09-14DBP 20050549313.2 ppb
2018-09-14DBP 20050549514.4 ppb
2018-09-14DBP 20050549710.3 ppb
2018-09-14DBP 2005054999.40 ppb
2018-09-17DBP 200505658ND
2018-12-14DBP 20051609316.0 ppb
2018-12-14DBP 2005160946.40 ppb
2018-12-14DBP 2005160959.10 ppb
2018-12-14DBP 2005160961.50 ppb
2018-12-14DBP 20051609711.8 ppb
2018-12-14DBP 2005160989.10 ppb
2018-12-14DBP 20051609913.2 ppb
2018-12-14DBP 20051610012.9 ppb
2019-03-14DBP 20052476013.3 ppb
2019-03-14DBP 2005247616.90 ppb
2019-03-14DBP 2005247628.50 ppb
2019-03-14DBP 2005247639.80 ppb
2019-03-14DBP 2005247647.40 ppb
2019-03-14DBP 20052476513.5 ppb
2019-03-14DBP 20052476611.6 ppb
2019-03-14DBP 2005247679.80 ppb
2019-06-20DBP 20053726511.1 ppb
2019-06-20DBP 2005372667.90 ppb
2019-06-20DBP 2005372677.60 ppb
2019-06-20DBP 2005372681.10 ppb
2019-06-20DBP 2005372698.60 ppb
2019-06-20DBP 20053727013.2 ppb
2019-06-20DBP 20053727110.1 ppb
2019-06-20DBP 2005372729.60 ppb
2019-09-19DBP 200549612ND
2019-09-19DBP 20054961325.4 ppb
2019-09-19DBP 200549615ND
2019-09-19DBP 2005496179.70 ppb
2019-09-19DBP 2005496186.80 ppb
2019-10-11DBP 20055250310.5 ppb
2019-10-11DBP 2005525047.20 ppb
2019-10-11DBP 2005525058.80 ppb
2019-12-19DBP 20056092610.00 ppb
2019-12-19DBP 2005609275.80 ppb
2019-12-19DBP 2005609296.10 ppb
2019-12-19DBP 20056093011.0 ppb
2019-12-19DBP 2005609317.80 ppb
2019-12-19DBP 2005609325.50 ppb
2019-12-19DBP 2005609348.30 ppb
2019-12-19DBP 2005609357.10 ppb