Know Your Environment. Protect Your Health.

Chloroform

Cassadaga Village

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.875 ppb440.600 ppb - 1.30 ppb
2019N/A00N/A
20202.75 ppb442.10 ppb - 3.50 ppb
20211.83 ppb661.40 ppb - 2.30 ppb
2022ND10ND
20237.60 ppb117.60 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
2018-07-16POCS 2018 CASS WL40.600 ppb
2018-07-16POCS 2018 CASS WL10.800 ppb
2018-07-16POCS 2018 CASS WL51.30 ppb
2018-10-09POCS 2018 CASS RESAM0.800 ppb
2020-08-1820 DBPS CASS AMES3.50 ppb
2020-08-1820 DBPS CASS BARD2.90 ppb
2020-11-18Q420 DBPS BARD RD2.50 ppb
2020-11-18Q420 DBPS CASS AMES2.10 ppb
2021-03-31Q1 21 DBP CASS AMES1.40 ppb
2021-03-31Q1 21 DBP CASS BARD2.20 ppb
2021-06-02Q2 21 DBP CASS BARD1.60 ppb
2021-06-02Q2 21 DBP CASS AMES1.40 ppb
2021-11-17Q4 21 DBP CASS BARD2.10 ppb
2021-11-17Q4 21 DBP CASS AMES2.30 ppb
2022-03-16POCS 22 CASS WL1ND
2023-08-23Q3 23 DBP CASS BARD7.60 ppb