Know Your Environment. Protect Your Health.

Chloroform

Connecticut Water Company - Hebron Center Division

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

 

20

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.35 ppb221.70 ppb - 3.00 ppb
20192.00 ppb221.000 ppb - 3.00 ppb
20203.40 ppb220.700 ppb - 6.10 ppb
20212.43 ppb330.700 ppb - 5.80 ppb
20221.54 ppb550.550 ppb - 4.90 ppb
20231.19 ppb660.510 ppb - 4.10 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on 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 fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-04-09CA16134VOC11.70 ppb
2018-08-20CB145843.00 ppb
2019-02-11VOC1 2005212121.000 ppb
2019-08-07DBP 2005437663.00 ppb
2020-08-21DBP 2005875956.10 ppb
2020-09-21VOC1 2005910100.700 ppb
2021-08-18DBP 2006291785.80 ppb
2021-08-31300048791 3000488000.800 ppb
2021-10-25V300088205 3000882060.700 ppb
2022-01-13CK162540.550 ppb
2022-04-21CL136930.760 ppb
2022-07-07CL722970.930 ppb
2022-08-18CM089544.90 ppb
2022-10-18CM656680.570 ppb
2023-01-12CN229720.520 ppb
2023-04-17CN852980.750 ppb
2023-08-15CO753450.660 ppb
2023-08-21CO793254.10 ppb
2023-10-17CP280390.610 ppb
2023-10-24CP330750.510 ppb