Know Your Environment. Protect Your Health.

Chloroform

Sunbelt Fresh Water Supply District High Meadows Subdivision

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND90ND
2019ND50ND
20201.04 ppb51ND - 5.20 ppb
202110.1 ppb43ND - 16.0 ppb
20222.68 ppb42ND - 6.30 ppb
20231.45 ppb41ND - 5.80 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
2018-01-29AE11209ND
2018-01-29AE11291ND
2018-01-29AE11293ND
2018-01-29AE11295ND
2018-01-29AE11207ND
2018-04-10AE21849ND
2018-04-10AE21850ND
2018-08-28AE38645ND
2018-08-28AE38654ND
2019-07-02AE73115ND
2019-07-02AE73116ND
2019-07-02AE73138ND
2019-07-02AE73144ND
2019-07-02AE73152ND
2020-05-20AF12119ND
2020-05-20AF12081ND
2020-09-15AF273755.20 ppb
2020-09-24AF28465ND
2020-10-14AF30635ND
2021-06-09AF5719411.4 ppb
2021-06-09AF5719512.8 ppb
2021-06-09AF5722216.0 ppb
2021-06-09AF57228ND
2022-01-26AF819566.30 ppb
2022-01-26AF81958ND
2022-05-26AF98651ND
2022-05-26AF986544.40 ppb
2023-03-07Q2309782001ND
2023-05-03AG39099ND
2023-05-03AG39103ND
2023-05-03AG391735.80 ppb