Know Your Environment. Protect Your Health.

Chloromethane

Cape Windsor Community Association Inc.

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.88 ppb111.88 ppb
20191.07 ppb220.810 ppb - 1.32 ppb
20200.740 ppb110.740 ppb
20211.05 ppb21ND - 2.09 ppb
20224.50 ppb220.870 ppb - 8.12 ppb
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

Date Lab ID Result
2018-11-27S8168871.88 ppb
2019-02-15S8664380.810 ppb
2019-09-04S8955671.32 ppb
2020-06-15S9527300.740 ppb
2021-03-19S1040928ND
2021-07-28S11066272.09 ppb
2022-06-24S11853528.12 ppb
2022-07-29S12171510.870 ppb
2023-12-20S1323291ND