Know Your Environment. Protect Your Health.

Chloroform

Northcrest Addition

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND30ND
2021ND30ND
2022ND30ND
2023ND30ND

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
2018-09-11Q1836165003ND
2018-09-11Q1836165012ND
2018-09-11Q1836165002ND
2019-09-18Q1966701001ND
2019-10-21Q1973080001ND
2019-10-21Q1973080003ND
2020-09-09Q2035904001ND
2020-10-13Q2040353001ND
2020-10-13Q2040353003ND
2021-09-10Q2124867001ND
2021-10-07Q2127873005ND
2021-10-07Q2127873007ND
2022-08-12Q2224081001ND
2022-10-17Q2231506006ND
2022-10-17Q2231506008ND
2023-05-22Q2319066001ND
2023-05-22Q2319066003ND
2023-05-22Q2319066009ND