Chloromethane
Westchester County Water District #1
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 1 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
---|---|---|
2014-12-01 | AQ24568POC | ND |
2016-09-06 | AS19150 POC WD#1 | ND |
2016-09-06 | AG19152 POC WD#1 | ND |
2017-11-13 | AT23824POCS | ND |
2017-11-13 | AT23822POCS | ND |
2018-09-24 | AU20757WD1 POCS | ND |
2018-09-24 | AU20758WD1 POCS | ND |
2019-11-12 | AV23849D POCS | ND |
2019-11-12 | AV23850D POCS | ND |