Know Your Environment. Protect Your Health.

Chloromethane

Howard Water Co-op

NOTE: Howard Water Co-op purchases water from Rockett SUD which is required to test for chloromethane. Sample information shown below was taken by Rockett SUD.

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

NOTE: Howard Water Co-op purchases water from Rockett SUD which is required to test for chloromethane. Sample information shown below was taken by Rockett SUD.

Date Lab ID Result
2015-01-29Q1503521001ND
2015-01-29Q1503521003ND
2015-04-20Q1514673001ND
2015-04-20Q1514673003ND
2015-07-22Q1528297001ND
2015-07-22Q1528297003ND
2015-10-19Q1540792001ND
2015-10-19Q1540792003ND