Know Your Environment. Protect Your Health.

Chloroform

Cooper County Consolidated Public Water Supply District # 1

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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201826.7 ppb97ND - 84.5 ppb
201931.2 ppb86ND - 105.0 ppb
202024.5 ppb118ND - 65.3 ppb
202116.5 ppb97ND - 43.1 ppb
202216.6 ppb86ND - 44.6 ppb
20233.64 ppb84ND - 26.4 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
2018-02-23AD142610.500 ppb
2018-02-23AD1426221.8 ppb
2018-03-02AD15102ND
2018-05-24AD2049559.8 ppb
2018-05-24AD204941.26 ppb
2018-08-15AD3118284.5 ppb
2018-08-15AD311831.70 ppb
2018-11-15AD3570470.8 ppb
2018-11-15AD35705ND
2019-03-14AD4140528.7 ppb
2019-03-14AD41406ND
2019-05-21AD474540.750 ppb
2019-05-21AD4745375.4 ppb
2019-08-27AD53910105.0 ppb
2019-08-27AD539110.790 ppb
2019-11-14AD5807939.1 ppb
2019-11-14AD58080ND
2020-02-12200202536.9 ppb
2020-02-122002026ND
2020-05-292008900ND
2020-05-29200890147.0 ppb
2020-06-152010784ND
2020-06-15201078365.3 ppb
2020-08-2020143441.06 ppb
2020-08-20201434347.7 ppb
2020-09-28201643539.0 ppb
2020-11-2320180550.500 ppb
2020-11-23201805432.4 ppb
2021-02-112101242ND
2021-03-012100760ND
2021-03-01210075925.0 ppb
2021-05-18211094443.1 ppb
2021-05-1821109451.05 ppb
2021-08-16211530337.1 ppb
2021-08-1621153041.17 ppb
2021-11-1521195230.560 ppb
2021-11-15211952240.4 ppb
2022-02-142202057ND
2022-02-14220205616.6 ppb
2022-05-2322115641.06 ppb
2022-05-23221156342.3 ppb
2022-08-17221626444.6 ppb
2022-08-1722162650.920 ppb
2022-11-222221177ND
2022-11-22222117627.3 ppb
2023-02-222300678ND
2023-02-22230067726.4 ppb
2023-05-1523081361.27 ppb
2023-05-1523081370.920 ppb
2023-08-162313364ND
2023-08-162313363ND
2023-11-162318301ND
2023-11-1623183020.530 ppb