Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

Southeast Morris County Municipal Utilities Authority

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

 

87

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0737 ppb192ND - 0.700 ppb
2015ND390ND
2016ND190ND
2017ND100ND
2018N/A00N/A
2019N/A00N/A

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
2014-01-0929566450.700 ppb
2014-01-092956644ND
2014-01-0929566400.700 ppb
2014-04-023002491ND
2014-04-023002492ND
2014-04-023002498ND
2014-04-023002497ND
2014-04-023002496ND
2014-04-023002487ND
2014-04-033002495ND
2014-07-093059514ND
2014-07-093059515ND
2014-07-093059510ND
2014-10-013115646ND
2014-10-013115651ND
2014-10-013115647ND
2014-10-013115644ND
2014-10-013115640ND
2014-10-013115645ND
2015-01-083166735ND
2015-01-083166740ND
2015-01-083166739ND
2015-03-173208258ND
2015-03-173208238ND
2015-03-183209319ND
2015-03-193210374ND
2015-03-193210357ND
2015-03-243213479ND
2015-03-243213291ND
2015-03-253213959ND
2015-03-263214805ND
2015-03-263214794ND
2015-04-013217018ND
2015-04-013217025ND
2015-04-013217024ND
2015-04-013217019ND
2015-04-013217026ND
2015-04-013217014ND
2015-04-013217023ND
2015-04-013217022ND
2015-06-183265668ND
2015-07-093276700ND
2015-07-093276701ND
2015-07-093276696ND
2015-09-083317085ND
2015-09-093317901ND
2015-09-153322705ND
2015-09-163324140ND
2015-09-173325005ND
2015-09-213326772ND
2015-09-223327758ND
2015-09-233328681ND
2015-09-293332180ND
2015-10-143341487ND
2015-10-143341491ND
2015-10-143341492ND
2015-10-143341493ND
2015-12-163375350ND
2016-01-073383125ND
2016-01-073383120ND
2016-01-073383124ND
2016-04-133430506ND
2016-04-133430507ND
2016-04-133430502ND
2016-04-133430497ND
2016-04-133430501ND
2016-04-133430505ND
2016-04-133430508ND
2016-07-063486605ND
2016-07-063486600ND
2016-07-063486604ND
2016-07-203499479ND
2016-10-123563763ND
2016-10-123563762ND
2016-10-123563757ND
2016-10-123563761ND
2016-10-123563764ND
2017-01-053618108ND
2017-01-053618112ND
2017-01-053618113ND
2017-04-123673074ND
2017-04-123673067ND
2017-04-123673071ND
2017-04-123673072ND
2017-04-123673063ND
2017-04-123673068ND
2017-04-123673073ND