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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Ontario Municipal Utilities Company

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.

MORE ABOUT THIS CONTAMINANT

 

102

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND510ND
2014ND330ND
2015ND20ND
2016N/A00N/A
2017ND150ND
2018N/A00N/A
2019ND10ND

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
2013-06-04B3F0340-03ND
2013-06-04B3F0340-01ND
2013-06-04B3F0340-11ND
2013-06-04B3F0340-09ND
2013-06-04B3F0340-07ND
2013-06-05B3F0557-01ND
2013-06-05B3F0557-03ND
2013-06-05B3F0557-05ND
2013-06-05B3F0557-09ND
2013-06-05B3F0557-07ND
2013-06-06B3F0707-11ND
2013-06-06B3F0707-13ND
2013-06-06B3F0707-07ND
2013-06-06B3F0707-05ND
2013-06-06B3F0707-03ND
2013-06-06B3F0707-01ND
2013-06-06B3F0707-09ND
2013-06-07B3F0790-01ND
2013-06-07B3F0790-09ND
2013-06-07B3F0790-13ND
2013-06-07B3F0781-05ND
2013-06-07B3F0790-11ND
2013-06-07B3F0790-05ND
2013-06-07B3F0790-07ND
2013-06-07B3F0790-03ND
2013-09-10B3I0873-01ND
2013-09-10B3I0873-04ND
2013-12-03B3L0312-04ND
2013-12-03B3L0312-07ND
2013-12-03B3L0312-01ND
2013-12-03B3L0312-13ND
2013-12-03B3L0312-10ND
2013-12-03B3L0312-16ND
2013-12-04B3L0477-13ND
2013-12-04B3L0477-04ND
2013-12-04B3L0477-07ND
2013-12-04B3L0477-01ND
2013-12-04B3L0477-10ND
2013-12-05B3L0587-13ND
2013-12-05B3L0587-10ND
2013-12-05B3L0587-07ND
2013-12-05B3L0587-04ND
2013-12-05B3L0587-01ND
2013-12-05B3L0587-16ND
2013-12-06B3L0671-01ND
2013-12-06B3L0671-04ND
2013-12-06B3L0671-07ND
2013-12-06B3L0658-04ND
2013-12-06B3L0658-01ND
2013-12-06B3L0658-07ND
2013-12-06B3L0658-10ND
2014-03-04B4C0458-01ND
2014-03-04B4C0458-04ND
2014-07-114790-017-0925ND
2014-07-114790-020-1020ND
2014-07-114790-045-0825ND
2014-07-144790-046-0800ND
2014-07-144790-048-0910ND
2014-07-184790-027-0930ND
2014-07-184790-042-0900ND
2014-07-244790-029-0830ND
2014-07-244790-031-0915ND
2014-07-284790-026-0900ND
2014-07-294790-022-1020ND
2014-07-294790-025-0950ND
2014-07-294790-034-0945ND
2014-07-294790-040-1040ND
2014-08-124790-040-0845ND
2014-08-124790-049-0800ND
2014-08-194790-032-0815ND
2014-08-194790-034-0900ND
2014-10-154790-017-1000ND
2014-10-154790-025-1100ND
2014-10-164790-045-0815ND
2014-10-164790-046-0910ND
2014-10-164790-048-1000ND
2014-10-284790-041-0850ND
2014-10-284790-043-0820ND
2014-10-284790-044-0800ND
2014-11-064790-022-1010ND
2014-11-064790-026-0915ND
2014-11-074790-030-0930ND
2014-12-044790-027-1020ND
2014-12-044790-042-0945ND
2015-05-074790-050-1042ND
2015-07-16B5G1760-01ND
2017-02-014790-050-0831ND
2017-04-204790-030-0910ND
2017-07-034790-042-0910ND
2017-07-034790-043-1110ND
2017-07-034790-044-1015ND
2017-07-064790-025-0955ND
2017-07-124790-031-1130ND
2017-07-124790-034-0910ND
2017-07-124790-041-0815ND
2017-07-124790-049-1055ND
2017-07-194790-020-0730ND
2017-07-194790-026-0930ND
2017-07-194790-032-0835ND
2017-07-194790-045-1050ND
2017-08-034790-048-0815ND
2019-10-304790-040-0826ND