Know Your Environment. Protect Your Health.

Chloromethane

City of Castroville

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-03-28AE20664ND
2018-03-28AE20680ND
2019-06-18AE71110ND
2019-06-18AE71116ND
2020-01-28AE95679ND
2020-01-28AE95685ND
2021-06-28AF59673ND
2021-06-28AF59675ND
2022-02-08AF83711ND
2022-02-08AF83715ND
2023-03-28AG34417ND
2023-03-28AG34419ND