Know Your Environment. Protect Your Health.

Chloroform

Bilma Public Utility 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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20186.20 ppb32ND - 9.40 ppb
201912.1 ppb32ND - 18.9 ppb
2020ND30ND
202112.4 ppb32ND - 19.1 ppb
20223.03 ppb31ND - 9.10 ppb
20235.43 ppb31ND - 16.3 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 Lab ID Result
2018-09-10AE393249.40 ppb
2018-09-10AE39382ND
2018-09-10AE393219.20 ppb
2019-09-25AE8459618.9 ppb
2019-09-25AE8459917.5 ppb
2019-12-17AE92589ND
2020-09-01AF26030ND
2020-09-01AF26032ND
2020-10-01AF29292ND
2021-08-24AF6764519.1 ppb
2021-08-24AF6764718.0 ppb
2021-10-07AF72675ND
2022-09-22AG144239.10 ppb
2022-09-22AG14425ND
2022-12-08AG21328ND
2023-07-13AG4844316.3 ppb
2023-07-13AG48444ND
2023-07-13AG48483ND