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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Georgetown

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND150ND
2014ND30ND
2015ND30ND
2016ND40ND
2017ND30ND

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
2012-07-12AB95151ND
2012-07-12AB95155ND
2012-07-12AB95153ND
2013-03-14201303150521AMND
2013-03-14201303150522AMND
2013-03-14201303150523AMND
2013-05-21201305220648AMND
2013-05-21201305220652AMND
2013-05-21201305220650AMND
2013-07-30201307310205AMND
2013-07-30201307310239AMND
2013-07-30201307310244AMND
2013-08-29Q1306583001ND
2013-08-29Q1306583003ND
2013-09-25Q1308517001ND
2013-12-04201312050281AMND
2013-12-04201312050287AMND
2013-12-04201312050174AMND
2014-09-25AC68260ND
2014-09-25AC68264ND
2014-09-25AC68258ND
2015-09-15AD07139ND
2015-09-15AD07147ND
2015-09-15AD07149ND
2016-04-21AD33769ND
2016-09-09AD48628ND
2016-09-09AD48634ND
2016-09-09AD48630ND
2017-07-06AD88508ND
2017-07-06AD88510ND
2017-07-06AD88506ND