Know Your Environment. Protect Your Health.

Chloroform

Lincoln County Board of Public Utilities #1

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.

 

58

Samples

0

Samples exceeding legal limit (MCL)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.277 ppb31ND - 0.831 ppb
2019N/A00N/A
2020N/A00N/A
20216.39 ppb197ND - 45.4 ppb
20227.52 ppb205ND - 71.9 ppb
20236.42 ppb166ND - 52.3 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 Result
2018-09-05ND
2018-09-05ND
2018-09-050.831 ppb
2021-02-09ND
2021-02-09ND
2021-02-0914.0 ppb
2021-02-0914.5 ppb
2021-05-11ND
2021-05-11ND
2021-05-111.32 ppb
2021-05-113.29 ppb
2021-08-10ND
2021-08-1045.4 ppb
2021-08-10ND
2021-08-10ND
2021-08-25ND
2021-08-25ND
2021-08-25ND
2021-11-0921.2 ppb
2021-11-09ND
2021-11-09ND
2021-11-0921.7 ppb
2022-02-0818.0 ppb
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-0818.0 ppb
2022-05-10ND
2022-05-10ND
2022-05-10ND
2022-05-1030.9 ppb
2022-08-09ND
2022-08-0971.9 ppb
2022-08-09ND
2022-08-09ND
2022-11-08ND
2022-11-08ND
2022-11-08ND
2022-11-0811.6 ppb
2023-02-141.60 ppb
2023-02-141.64 ppb
2023-02-14ND
2023-02-14ND
2023-05-092.47 ppb
2023-05-09ND
2023-05-09ND
2023-05-0912.3 ppb
2023-08-08ND
2023-08-08ND
2023-08-08ND
2023-08-0852.3 ppb
2023-11-14ND
2023-11-14ND
2023-11-14ND
2023-11-1432.4 ppb