Know Your Environment. Protect Your Health.

Chloroform

Glenwood Water District

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND250ND
2019ND220ND
2020ND20ND
20210.550 ppb21ND - 1.10 ppb
20220.375 ppb21ND - 0.750 ppb
20230.460 ppb21ND - 0.920 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
2020-08-2470143096001ND
2020-08-2470143101001ND
2021-08-23701849530011.10 ppb
2021-08-2370184956001ND
2022-08-2270226726001ND
2022-08-22702267250010.750 ppb
2023-08-2170267723001ND
2023-08-21702677240010.920 ppb