Know Your Environment. Protect Your Health.

Chloroform

CTWC - Naugatuck Region-Central System

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.

 

105

Samples

0

Samples exceeding legal limit (MCL)

102

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201824.5 ppb2017ND - 42.0 ppb
201923.4 ppb17175.60 ppb - 33.0 ppb
202020.4 ppb17174.00 ppb - 46.4 ppb
202120.0 ppb17173.60 ppb - 34.8 ppb
202221.4 ppb17175.40 ppb - 42.0 ppb
202319.2 ppb17172.60 ppb - 37.0 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
2018-01-15BZ72858VOC110.00 ppb
2018-02-13BZ88506VOC1ND
2018-02-14BZ89697TTHM24.0 ppb
2018-02-14BZ89698TTHM37.0 ppb
2018-02-14BZ89699TTHM36.0 ppb
2018-02-14BZ89700TTHM42.0 ppb
2018-05-21CA50437TTHM27.0 ppb
2018-05-21CA50438TTHM15.0 ppb
2018-05-21CA50439TTHM30.0 ppb
2018-05-21CA50440TTHM29.0 ppb
2018-05-21CA50441VOC1ND
2018-06-11CA67845VOC1ND
2018-08-20CB1493920.0 ppb
2018-08-20CB1494032.0 ppb
2018-08-20CB1494132.0 ppb
2018-08-20CB1494232.0 ppb
2018-11-20DBP 20051350233.1 ppb
2018-11-20DBP 20051350434.5 ppb
2018-11-20DBP 20051350619.7 ppb
2018-11-20DBP 20051353436.3 ppb
2019-02-12VOC1 2005213785.60 ppb
2019-02-20DBP 20052244729.4 ppb
2019-02-20DBP 20052244825.5 ppb
2019-02-20DBP 20052244929.7 ppb
2019-02-20DBP 20052245016.7 ppb
2019-05-21DBP 20053325725.0 ppb
2019-05-21DBP 20053325819.2 ppb
2019-05-21DBP 20053325925.7 ppb
2019-05-21DBP 2005332606.40 ppb
2019-08-20DBP 20054589032.9 ppb
2019-08-20DBP 20054589130.4 ppb
2019-08-20DBP 20054589228.5 ppb
2019-08-20DBP 20054589313.8 ppb
2019-11-19DBP 20055740433.0 ppb
2019-11-19DBP 20055740532.2 ppb
2019-11-19DBP 20055740632.1 ppb
2019-11-19DBP 20055740712.5 ppb
2020-01-14VOC1 2005630464.00 ppb
2020-02-19DBP 20056688023.6 ppb
2020-02-19DBP 20056688120.1 ppb
2020-02-19DBP 20056688226.9 ppb
2020-02-19DBP 2005668838.20 ppb
2020-05-05DBP 20057462714.9 ppb
2020-05-05DBP 20057462817.5 ppb
2020-05-05DBP 2005746299.90 ppb
2020-05-05DBP 20057463029.8 ppb
2020-08-14DBP 20058671746.4 ppb
2020-08-14DBP 20058672132.7 ppb
2020-08-14DBP 20058672218.3 ppb
2020-08-14DBP 20058672340.7 ppb
2020-11-17DBP 20059852914.0 ppb
2020-11-17DBP 20059853012.6 ppb
2020-11-17DBP 2005985314.30 ppb
2020-11-17DBP 20059853223.3 ppb
2021-02-17DBP 2006070888.40 ppb
2021-02-17DBP 2006070898.00 ppb
2021-02-17DBP 2006070903.60 ppb
2021-02-17DBP 20060709116.0 ppb
2021-04-06VOC1 2006119633.60 ppb
2021-05-21DBP 20061817325.8 ppb
2021-05-21DBP 20061817418.2 ppb
2021-05-21DBP 20061817511.3 ppb
2021-05-21DBP 20061817630.7 ppb
2021-08-12DBP 20062891927.7 ppb
2021-08-12DBP 20062892026.6 ppb
2021-08-12DBP 20062892113.4 ppb
2021-08-12DBP 20062892234.8 ppb
2021-11-02D300094265 30009427031.5 ppb
2021-11-02D300094266 30009427229.9 ppb
2021-11-02D300094267 30009427416.0 ppb
2021-11-02D300094268 30009427633.7 ppb
2022-02-14CK666715.40 ppb
2022-02-22CK7305822.0 ppb
2022-02-22CK7305918.0 ppb
2022-02-22CK7306028.0 ppb
2022-02-22CK7306114.0 ppb
2022-05-20CL3607319.0 ppb
2022-05-20CL3607419.0 ppb
2022-05-20CL3607529.0 ppb
2022-05-20CL3607613.0 ppb
2022-08-03CL9638042.0 ppb
2022-08-03CL9638136.0 ppb
2022-08-03CL9638241.0 ppb
2022-08-03CL9638323.0 ppb
2022-11-04CM7928518.0 ppb
2022-11-04CM7928612.0 ppb
2022-11-04CM7928718.0 ppb
2022-11-04CM792886.90 ppb
2023-01-16CN248272.60 ppb
2023-02-09CN4144112.0 ppb
2023-02-09CN414429.40 ppb
2023-02-09CN4144316.0 ppb
2023-02-09CN414447.30 ppb
2023-05-08CO0164419.0 ppb
2023-05-08CO0164516.0 ppb
2023-05-08CO0164623.0 ppb
2023-05-08CO0164710.00 ppb
2023-08-04CO6817037.0 ppb
2023-08-04CO6817127.0 ppb
2023-08-04CO6817231.0 ppb
2023-08-04CO6817316.0 ppb
2023-11-03CP4146330.0 ppb
2023-11-03CP4146423.0 ppb
2023-11-03CP4146529.0 ppb
2023-11-03CP4146618.0 ppb