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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Deerwood Subdivision

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND120ND
2019ND130ND

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
2018-02-26LLH67791ND
2018-02-26LLH67793ND
2018-02-26LLH67792ND
2018-05-10LLH79900ND
2018-05-10LLH79901ND
2018-05-10LLH79909ND
2018-08-15LLH99363ND
2018-08-15LLH99375ND
2018-08-15LLH99376ND
2018-10-31LLI13468ND
2018-10-31LLI13469ND
2018-10-31LLI13480ND
2019-02-21LLI26628ND
2019-02-21LLI26627ND
2019-02-21LLI26625ND
2019-05-31LLI40256ND
2019-05-31LLI40265ND
2019-05-31LLI40266ND
2019-09-09LLI62404ND
2019-09-09LLI62406ND
2019-09-09LLI62407ND
2019-10-31LLI74079ND
2019-10-31LLI74074ND
2019-10-31LLI74073ND
2019-12-17LLI84105ND