Know Your Environment. Protect Your Health.

Chloroform

Edna Mahan Correctional

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.233 ppb330.200 ppb - 0.300 ppb
20190.300 ppb220.200 ppb - 0.400 ppb
20200.165 ppb220.160 ppb - 0.170 ppb
20210.247 ppb330.180 ppb - 0.370 ppb
20220.195 ppb220.130 ppb - 0.260 ppb
20230.650 ppb220.200 ppb - 1.10 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
2018-07-20L7045563-10.300 ppb
2018-07-20L7045563-20.200 ppb
2018-09-18L7039622-10.200 ppb
2019-07-19L7138524-10.200 ppb
2019-07-19L7138524-20.400 ppb
2020-07-24630-3761-10.170 ppb
2020-07-24630-3761-20.160 ppb
2021-07-14630-19615-10.190 ppb
2021-07-29630-20136-10.180 ppb
2021-07-29630-20136-20.370 ppb
2022-07-22630-40368-1-THM0.130 ppb
2022-07-22630-40368-2-THM0.260 ppb
2023-07-10630-65986-10.200 ppb
2023-07-10630-65986-41.10 ppb