Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

Wilmington Water Department

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015N/A00N/A
20160.900 ppb220.600 ppb - 1.20 ppb
20170.655 ppb440.520 ppb - 0.790 ppb
2018N/A00N/A
2019ND60ND

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 Result
2014-01-21ND
2014-01-21ND
2014-01-21ND
2014-04-29ND
2014-04-29ND
2014-07-23ND
2014-07-23ND
2014-07-28ND
2014-10-22ND
2014-10-22ND
2016-09-011.20 ppb
2016-09-010.600 ppb
2017-08-230.520 ppb
2017-08-230.790 ppb
2017-08-230.660 ppb
2017-08-230.650 ppb
2019-07-10ND
2019-08-06ND
2019-08-06ND
2019-08-06ND
2019-08-06ND
2019-08-06ND