Know Your Environment. Protect Your Health.

Chloroform

Hillcrest Village Mobile Home Park

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
20194.75 ppb43ND - 13.1 ppb
20200.275 ppb42ND - 0.600 ppb
20210.175 ppb41ND - 0.700 ppb
2022ND40ND
20230.840 ppb41ND - 3.36 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 Result
2018-02-20ND
2018-05-08ND
2018-08-13ND
2018-11-20ND
2019-02-254.50 ppb
2019-06-24ND
2019-08-3013.1 ppb
2019-11-061.40 ppb
2020-02-100.600 ppb
2020-05-22ND
2020-08-060.500 ppb
2020-11-20ND
2021-02-020.700 ppb
2021-05-04ND
2021-08-09ND
2021-11-08ND
2022-02-10ND
2022-05-16ND
2022-08-03ND
2022-11-21ND
2023-02-13ND
2023-05-26ND
2023-08-17ND
2023-11-133.36 ppb