Know Your Environment. Protect Your Health.

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.

 

168

Samples

0

Samples exceeding legal limit (MCL)

162

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201810.6 ppb3231ND - 16.0 ppb
20198.75 ppb3230ND - 25.4 ppb
20207.63 ppb3231ND - 14.2 ppb
20219.31 ppb16161.000 ppb - 16.3 ppb
20227.93 ppb2422ND - 16.0 ppb
202310.2 ppb32321.40 ppb - 25.0 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to reproduction and child development.

ppb = parts per billion

All test results

Date Lab ID Result
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
2020-03-19DBP 2005699769.50 ppb
2020-03-19DBP 2005699775.80 ppb
2020-03-19DBP 2005699787.00 ppb
2020-03-19DBP 2005699798.40 ppb
2020-03-19DBP 2005699807.80 ppb
2020-03-19DBP 2005699817.20 ppb
2020-03-19DBP 2005699829.50 ppb
2020-03-19DBP 2005699838.80 ppb
2020-06-18DBP 2005797947.70 ppb
2020-06-18DBP 2005797956.80 ppb
2020-06-18DBP 2005797966.00 ppb
2020-06-18DBP 2005797972.40 ppb
2020-06-18DBP 2005797988.60 ppb
2020-06-18DBP 2005797997.10 ppb
2020-06-18DBP 2005798009.30 ppb
2020-06-18DBP 2005798018.90 ppb
2020-09-17DBP 2005906612.50 ppb
2020-09-17DBP 2005906627.80 ppb
2020-09-17DBP 200590663ND
2020-09-17DBP 2005906648.10 ppb
2020-09-17DBP 2005906657.70 ppb
2020-09-17DBP 2005906667.10 ppb
2020-09-17DBP 2005906676.80 ppb
2020-09-17DBP 2005906688.60 ppb
2020-12-18DBP 20060159810.9 ppb
2020-12-18DBP 2006015996.40 ppb
2020-12-18DBP 2006016007.30 ppb
2020-12-18DBP 2006016017.20 ppb
2020-12-18DBP 2006016028.90 ppb
2020-12-18DBP 20060160314.2 ppb
2020-12-18DBP 20060160410.00 ppb
2020-12-18DBP 2006016059.70 ppb
2021-03-18DBP 20061031611.7 ppb
2021-03-18DBP 2006103175.70 ppb
2021-03-18DBP 2006103185.70 ppb
2021-03-18DBP 2006103197.30 ppb
2021-03-18DBP 20061032010.1 ppb
2021-03-18DBP 20061032112.2 ppb
2021-03-18DBP 20061032211.5 ppb
2021-03-18DBP 2006103235.90 ppb
2021-06-17DBP 20062134113.2 ppb
2021-06-17DBP 2006213429.00 ppb
2021-06-17DBP 2006213431.000 ppb
2021-06-17DBP 20062134412.8 ppb
2021-06-17DBP 2006213458.00 ppb
2021-06-17DBP 2006213468.40 ppb
2021-06-17DBP 20062134710.2 ppb
2021-06-17DBP 20062134816.3 ppb
2022-06-142882971.40 ppb
2022-06-142882998.40 ppb
2022-06-1428830310.00 ppb
2022-06-1428830511.0 ppb
2022-06-1528830116.0 ppb
2022-06-1528829113.0 ppb
2022-06-152882938.50 ppb
2022-06-152882958.90 ppb
2022-09-142962908.40 ppb
2022-09-152962928.00 ppb
2022-09-15296294ND
2022-09-152962966.80 ppb
2022-09-152962987.60 ppb
2022-09-15296300ND
2022-09-152963027.20 ppb
2022-09-152963082.10 ppb
2022-12-1330303514.0 ppb
2022-12-1330303712.0 ppb
2022-12-133030397.80 ppb
2022-12-133030289.50 ppb
2022-12-133030318.10 ppb
2022-12-143030338.50 ppb
2022-12-153030246.00 ppb
2022-12-153030267.00 ppb
2023-03-063078136.30 ppb
2023-03-0730781116.0 ppb
2023-03-073078125.20 ppb
2023-03-073078178.90 ppb
2023-03-073078185.90 ppb
2023-03-073078146.90 ppb
2023-03-0730781612.0 ppb
2023-03-083078156.20 ppb
2023-06-06N3F0423-0118.0 ppb
2023-06-06N3F0423-0313.0 ppb
2023-06-06N3F0423-0625.0 ppb
2023-06-06N3F0423-0812.0 ppb
2023-06-07N3F0423-0714.0 ppb
2023-06-07N3F0423-041.40 ppb
2023-06-07N3F0423-0212.0 ppb
2023-06-08N3F0423-0512.0 ppb
2023-09-12CO999823.40 ppb
2023-09-12CO9998310.00 ppb
2023-09-12CO999899.40 ppb
2023-09-13CO9998611.0 ppb
2023-09-13CO9998711.0 ppb
2023-09-13CO999886.00 ppb
2023-09-14CO999849.20 ppb
2023-09-14CO999852.60 ppb
2023-12-11CP6821311.0 ppb
2023-12-12CP682144.90 ppb
2023-12-12CP6821618.0 ppb
2023-12-12CP6821712.0 ppb
2023-12-12CP6821811.0 ppb
2023-12-12CP6821115.0 ppb
2023-12-12CP682129.10 ppb
2023-12-13CP682157.90 ppb