Know Your Environment. Protect Your Health.

Chloroform

City of Grandview

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.290 ppb21ND - 0.580 ppb
20190.250 ppb41ND - 1.000 ppb
2020N/A00N/A
20214.43 ppb112ND - 47.6 ppb
20220.152 ppb52ND - 0.500 ppb
20231.01 ppb220.240 ppb - 1.78 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
2018-06-19ND
2018-06-190.580 ppb
2019-03-19ND
2019-04-23ND
2019-06-181.000 ppb
2019-06-18ND
2021-04-134102293ND
2021-04-13410203247.6 ppb
2021-04-134102010ND
2021-04-134102292ND
2021-04-134102290ND
2021-04-134102291ND
2021-04-134102289ND
2021-06-2941451811.12 ppb
2021-06-294145180ND
2021-09-214183352ND
2021-12-134217915ND
2022-03-214263833ND
2022-06-0742988510.500 ppb
2022-07-1943195000.260 ppb
2022-09-204347786ND
2022-10-244364692ND
2023-09-0645131781.78 ppb
2023-09-0645131770.240 ppb