Know Your Environment. Protect Your Health.

Dichloroacetic acid

Connecticut Water Company - Northern Region-Western System

Dichloroacetic 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.

 

193

Samples

0

Samples exceeding legal limit (MCL)

190

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20187.03 ppb3231ND - 17.0 ppb
20195.93 ppb32320.700 ppb - 13.0 ppb
20205.01 ppb3332ND - 12.6 ppb
20216.01 ppb3231ND - 13.3 ppb
20228.11 ppb32321.50 ppb - 17.0 ppb
20237.44 ppb32322.30 ppb - 18.0 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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
2018-02-01BZ83504HAA517.0 ppb
2018-02-01BZ83505HAA511.0 ppb
2018-02-01BZ83506HAA516.0 ppb
2018-02-01BZ83507HAA55.30 ppb
2018-02-01BZ83508HAA57.30 ppb
2018-02-01BZ83509HAA58.30 ppb
2018-02-01BZ83510HAA57.60 ppb
2018-02-21BZ93283HAA57.80 ppb
2018-05-03CA41161HAA512.0 ppb
2018-05-03CA41162HAA513.0 ppb
2018-05-03CA41163HAA513.0 ppb
2018-05-03CA41164HAA53.40 ppb
2018-05-03CA41165HAA54.70 ppb
2018-05-03CA41166HAA57.10 ppb
2018-05-03CA41167HAA57.20 ppb
2018-05-15CA48118HAA510.00 ppb
2018-08-02CB040201.80 ppb
2018-08-02CB040215.00 ppb
2018-08-02CB040223.00 ppb
2018-08-02CB040233.00 ppb
2018-08-02CB040246.40 ppb
2018-08-02CB0402510.00 ppb
2018-08-02CB0402611.0 ppb
2018-08-06CB058405.90 ppb
2018-11-01DBP 2005111331.60 ppb
2018-11-01DBP 2005111340.900 ppb
2018-11-01DBP 2005111351.000 ppb
2018-11-01DBP 200511136ND
2018-11-01DBP 2005111375.80 ppb
2018-11-01DBP 2005111385.20 ppb
2018-11-01DBP 2005111396.50 ppb
2018-11-05DBP 2005113897.00 ppb
2019-02-07DBP 2005210835.20 ppb
2019-02-07DBP 2005210848.30 ppb
2019-02-07DBP 2005210854.30 ppb
2019-02-07DBP 2005210868.80 ppb
2019-02-07DBP 2005210873.90 ppb
2019-02-07DBP 20052108810.4 ppb
2019-02-07DBP 2005210898.60 ppb
2019-02-11DBP 2005212566.60 ppb
2019-05-09DBP 2005315752.10 ppb
2019-05-09DBP 20053157611.6 ppb
2019-05-09DBP 20053157713.0 ppb
2019-05-09DBP 20053158211.3 ppb
2019-05-09DBP 2005315845.90 ppb
2019-05-09DBP 2005315866.60 ppb
2019-05-09DBP 2005315876.70 ppb
2019-05-13DBP 2005318377.30 ppb
2019-08-01DBP 2005427221.40 ppb
2019-08-01DBP 2005427232.00 ppb
2019-08-01DBP 2005427246.10 ppb
2019-08-01DBP 2005427250.700 ppb
2019-08-01DBP 2005427266.90 ppb
2019-08-01DBP 2005427276.20 ppb
2019-08-01DBP 2005427285.60 ppb
2019-08-13DBP 2005447589.40 ppb
2019-11-07DBP 2005558280.800 ppb
2019-11-07DBP 2005558301.40 ppb
2019-11-07DBP 2005558313.30 ppb
2019-11-07DBP 2005558320.700 ppb
2019-11-07DBP 2005558336.40 ppb
2019-11-07DBP 2005558346.10 ppb
2019-11-07DBP 2005558355.60 ppb
2019-11-18DBP 2005570046.60 ppb
2020-01-06DBP 2005616656.60 ppb
2020-02-06DBP 2005653573.00 ppb
2020-02-06DBP 2005653588.70 ppb
2020-02-06DBP 2005653598.60 ppb
2020-02-06DBP 2005653607.10 ppb
2020-02-06DBP 2005653615.10 ppb
2020-02-06DBP 2005653624.30 ppb
2020-02-07DBP 2005656401.40 ppb
2020-02-07DBP 2005656417.00 ppb
2020-05-07DBP 2005751718.80 ppb
2020-05-07DBP 2005751756.10 ppb
2020-05-07DBP 2005751765.40 ppb
2020-05-07DBP 2005751778.60 ppb
2020-05-07DBP 2005751731.000 ppb
2020-05-08DBP 20057517012.6 ppb
2020-05-08DBP 2005751749.90 ppb
2020-05-08DBP 2005751729.90 ppb
2020-08-06DBP 200585744ND
2020-08-06DBP 2005857509.60 ppb
2020-08-06DBP 2005857530.900 ppb
2020-08-06DBP 2005857541.000 ppb
2020-08-07DBP 2005857550.500 ppb
2020-08-07DBP 2005857566.80 ppb
2020-08-07DBP 2005857577.60 ppb
2020-08-07DBP 2005857584.50 ppb
2020-11-05DBP 2005973563.30 ppb
2020-11-05DBP 2005973570.500 ppb
2020-11-05DBP 2005973584.30 ppb
2020-11-05DBP 2005973592.30 ppb
2020-11-05DBP 2005973602.10 ppb
2020-11-05DBP 2005973614.10 ppb
2020-11-12DBP 2005982060.600 ppb
2020-11-12DBP 2005982103.20 ppb
2021-02-11DBP 2006068954.40 ppb
2021-02-11DBP 2006068966.40 ppb
2021-02-11DBP 2006069073.70 ppb
2021-02-12DBP 2006069116.00 ppb
2021-02-16DBP 20060691211.1 ppb
2021-02-17DBP 2006071128.20 ppb
2021-02-22DBP 2006074595.60 ppb
2021-02-23DBP 2006076458.80 ppb
2021-05-13DBP 2006172399.90 ppb
2021-05-14DBP 20061723610.8 ppb
2021-05-14DBP 2006172376.70 ppb
2021-05-14DBP 2006172386.00 ppb
2021-05-20DBP 2006183164.50 ppb
2021-05-20DBP 2006183176.70 ppb
2021-05-20DBP 20061831911.4 ppb
2021-05-20DBP 20061832112.1 ppb
2021-08-12DBP 2006287561.40 ppb
2021-08-12DBP 20062875710.2 ppb
2021-08-12DBP 2006287580.500 ppb
2021-08-12DBP 20062875911.8 ppb
2021-08-12DBP 20062876013.3 ppb
2021-08-12DBP 2006287611.70 ppb
2021-08-25DBP 2006298151.000 ppb
2021-08-25DBP 2006298161.40 ppb
2021-11-04D300098348 3000983562.70 ppb
2021-11-04D300098349 3000983586.10 ppb
2021-11-04D300098350 300098360ND
2021-11-04D300098351 3000983626.20 ppb
2021-11-04D300098352 3000983647.80 ppb
2021-11-05D300098353 3000983662.00 ppb
2021-11-05D300098354 3000983681.000 ppb
2021-11-05D300098355 3000983702.80 ppb
2022-02-03CK2975210.00 ppb
2022-02-03CK297536.70 ppb
2022-02-03CK297544.40 ppb
2022-02-03CK297557.50 ppb
2022-02-03CK297569.70 ppb
2022-02-03CK297579.90 ppb
2022-02-03CK2975810.00 ppb
2022-02-04CK3148917.0 ppb
2022-05-12CL3151312.0 ppb
2022-05-12CL315145.20 ppb
2022-05-12CL315159.50 ppb
2022-05-12CL3151615.0 ppb
2022-05-12CL315179.50 ppb
2022-05-13CL3151814.0 ppb
2022-05-13CL3151916.0 ppb
2022-05-13CL3152014.0 ppb
2022-08-04CL989633.90 ppb
2022-08-04CL9896412.0 ppb
2022-08-04CL989654.00 ppb
2022-08-05CL989664.40 ppb
2022-08-05CL989672.30 ppb
2022-08-05CL989684.60 ppb
2022-08-05CL9896917.0 ppb
2022-08-05CL9897013.0 ppb
2022-11-17CM902831.70 ppb
2022-11-17CM902844.30 ppb
2022-11-17CM902852.00 ppb
2022-11-17CM902865.60 ppb
2022-11-17CM902876.60 ppb
2022-11-17CM902881.60 ppb
2022-11-17CM902894.50 ppb
2022-11-18CM902901.50 ppb
2023-02-02CN370775.30 ppb
2023-02-02CN370788.60 ppb
2023-02-02CN370798.80 ppb
2023-02-02CN370805.10 ppb
2023-02-02CN370817.70 ppb
2023-02-02CN370826.80 ppb
2023-02-02CN370838.00 ppb
2023-02-02CN370846.10 ppb
2023-05-12CO0629410.00 ppb
2023-05-12CO0629513.0 ppb
2023-05-12CO0629611.0 ppb
2023-05-12CO0629714.0 ppb
2023-05-12CO0629815.0 ppb
2023-05-12CO0629918.0 ppb
2023-05-18CO093869.40 ppb
2023-05-18CO0938713.0 ppb
2023-08-10CO733768.80 ppb
2023-08-10CO733773.00 ppb
2023-08-10CO733784.10 ppb
2023-08-11CO7337912.0 ppb
2023-08-11CO733807.40 ppb
2023-08-11CO733813.50 ppb
2023-08-11CO733823.20 ppb
2023-08-11CO733834.00 ppb
2023-11-16CP504492.50 ppb
2023-11-16CP504506.50 ppb
2023-11-16CP504512.30 ppb
2023-11-16CP504525.50 ppb
2023-11-16CP504535.00 ppb
2023-11-16CP504543.00 ppb
2023-11-16CP504554.20 ppb
2023-11-17CP504563.20 ppb