Know Your Environment. Protect Your Health.

Chloroform

Pine Ridge Plantation

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201811.0 ppb1111.0 ppb
20190.900 ppb110.900 ppb
2020N/A00N/A
20212.40 ppb112.40 ppb
20220.957 ppb330.580 ppb - 1.30 ppb
20230.723 ppb440.560 ppb - 0.920 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
2018-07-24AJ9526211.0 ppb
2019-09-23AK324240.900 ppb
2021-09-08AK852292.40 ppb
2022-08-01AL080410.580 ppb
2022-09-19AL150771.30 ppb
2022-11-03AL198870.990 ppb
2023-02-07AL248640.680 ppb
2023-05-08AL312510.730 ppb
2023-07-24AL377170.920 ppb
2023-11-08AL488890.560 ppb