Know Your Environment. Protect Your Health.

Chloroform

Jordanelle Special Service 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.

 

50

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.914 ppb73ND - 3.00 ppb
20190.0750 ppb81ND - 0.600 ppb
2020ND70ND
20210.0875 ppb81ND - 0.700 ppb
20220.470 ppb103ND - 3.10 ppb
2023ND100ND

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
2018-01-102.70 ppb
2018-04-093.00 ppb
2018-07-030.700 ppb
2018-07-18ND
2018-08-07ND
2018-08-07ND
2018-10-16ND
2019-01-08ND
2019-04-230.600 ppb
2019-06-27ND
2019-06-27ND
2019-07-29ND
2019-08-28ND
2019-08-28ND
2019-10-16ND
2020-01-13ND
2020-04-15ND
2020-07-29ND
2020-08-03ND
2020-08-10ND
2020-08-10ND
2020-10-20ND
2021-01-11ND
2021-01-19ND
2021-04-12ND
2021-06-29ND
2021-07-13ND
2021-08-11ND
2021-08-11ND
2021-10-190.700 ppb
2022-01-11ND
2022-04-06ND
2022-07-14ND
2022-07-140.500 ppb
2022-07-14ND
2022-07-14ND
2022-07-19ND
2022-10-05ND
2022-12-063.10 ppb
2022-12-061.10 ppb
2023-01-18ND
2023-04-06ND
2023-05-24ND
2023-05-24ND
2023-06-05ND
2023-07-17ND
2023-07-17ND
2023-07-17ND
2023-08-10ND
2023-10-24ND