Know Your Environment. Protect Your Health.

Chloroform

Cal Am - Dunnigan

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND20ND
2021ND20ND
2022ND30ND
2023ND60ND

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
2018-07-13CA5700712_DST_018-201807131135ND
2019-07-11CA5700712_DST_018-201907111415ND
2020-07-09CA5700712_DST_902-202007091200ND
2020-07-09CA5700712_DST_903-202007091150ND
2021-07-08CA5700712_DST_903-202107080830ND
2021-07-08CA5700712_DST_902-202107080815ND
2022-07-12CA5700712_DST_902-202207120945ND
2022-07-12CA5700712_DST_903-202207120940ND
2022-08-23CA5700712_050_050-202208230900ND
2023-01-17CA5700712_050_050-202301171100ND
2023-05-08CA5700712_050_050-202305081020ND
2023-07-11CA5700712_DST_902-202307110905ND
2023-07-11CA5700712_DST_903-202307110850ND
2023-08-03CA5700712_050_050-202308031050ND
2023-11-08CA5700712_050_050-202311080940ND