Know Your Environment. Protect Your Health.

Chloroform

Ashville Village Public Water System

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.300 ppb21ND - 0.600 ppb
20200.735 ppb220.660 ppb - 0.810 ppb
20210.400 ppb220.400 ppb
20220.300 ppb220.1000 ppb - 0.500 ppb
20230.550 ppb220.500 ppb - 0.600 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
2018-07-05A180614017ND
2018-07-17A180621742ND
2019-07-119G01951-01ND
2019-07-169G02560-010.600 ppb
2020-08-2052489580040.810 ppb
2020-08-2052489580050.660 ppb
2021-07-151G02530-010.400 ppb
2021-08-051H00786-010.400 ppb
2022-08-042H00788-010.500 ppb
2022-09-082I01160-010.1000 ppb
2023-07-063G00744-010.600 ppb
2023-08-173H03191-010.500 ppb