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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Perkasie Regional 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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND100ND
2014ND110ND
2015ND110ND
2016ND110ND
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
2013-03-26201303270206AMND
2013-03-26201303270196AMND
2013-03-26201303270202AMND
2013-03-26201303270200AMND
2013-03-26201303270232AMND
2013-09-24201309250098AMND
2013-09-24201309250056AMND
2013-09-24201309250043AMND
2013-09-24201309250047AMND
2013-09-24201309250180AMND
2014-03-11L2515685-1ND
2014-03-11L2515685-2ND
2014-06-10L5101092-11ND
2014-06-10L5101092-12ND
2014-09-09L5170431-1ND
2014-09-09L5170431-5ND
2014-09-09L5170431-4ND
2014-09-09L5170431-2ND
2014-09-09L5170431-3ND
2014-12-09L5292845-2ND
2014-12-09L5292845-1ND
2015-03-1012501655ND
2015-03-1012501709ND
2015-06-0912867698ND
2015-06-0912867644ND
2015-09-0813250292ND
2015-09-0813250238ND
2015-09-0813250130ND
2015-09-0813250184ND
2015-09-0813250076ND
2015-12-0813619613ND
2015-12-0813619667ND
2016-03-0813972712ND
2016-03-0813972764ND
2016-06-0714389029ND
2016-06-0714389081ND
2016-09-1314889427ND
2016-09-1314889531ND
2016-09-1314889479ND
2016-09-1314889635ND
2016-09-1314889583ND
2016-12-0615355989ND
2016-12-0615356041ND
2017-03-0715780095ND
2017-03-0715780147ND
2017-06-0616240720ND
2017-06-0616240772ND
2017-09-0516710881ND
2017-09-0516710933ND
2017-09-0516710985ND
2017-09-0516711037ND
2017-12-0517146828ND
2017-12-0517146776ND