Chloromethane
Riddle Farm
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 | 1.20 ppb | 1 | 1 | 1.20 ppb |
2015 | 1.28 ppb | 1 | 1 | 1.28 ppb |
2016 | 0.860 ppb | 1 | 1 | 0.860 ppb |
2017 | 0.920 ppb | 1 | 1 | 0.920 ppb |
2018 | 0.800 ppb | 1 | 1 | 0.800 ppb |
2019 | 0.950 ppb | 2 | 2 | 0.800 ppb - 1.10 ppb |
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 |
---|---|---|
2014-07-29 | 0230019_01_00042 | 1.20 ppb |
2015-10-08 | E16001575010 | 1.28 ppb |
2016-10-27 | E17001891001 | 0.860 ppb |
2017-02-28 | E17003383004 | 0.920 ppb |
2018-10-23 | E19001359005 | 0.800 ppb |
2019-06-05 | E19004188001 | 1.10 ppb |
2019-12-10 | RF121019 | 0.800 ppb |