Chloromethane

City of Sunset Valley

NOTE: City of Sunset Valley purchases water from City of Austin Water & Wastewater which is required to test for chloromethane. Sample information shown below was taken by City of Austin Water & Wastewater.

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	4	ND
2015	ND	6	ND
2016	ND	3	ND
2017	ND	3	ND
2018	ND	3	ND
2019	ND	3	ND

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
2013-10-22	Q1309118005	ND
2013-10-22	Q1309118001	ND
2014-01-23	Q1402097001	ND
2014-01-23	Q1402097005	ND
2014-04-15	Q1411774005	ND
2014-04-15	Q1411774001	ND
2014-07-24	Q1430548005	ND
2014-07-24	Q1430548001	ND
2014-08-19	AC64332	ND
2014-08-19	AC64304	ND
2015-03-23	AC85661	ND
2015-05-28	AC93641	ND
2015-09-01	AD05218	ND
2015-09-01	AD05216	ND
2015-09-01	AD05224	ND
2015-11-17	AD13846	ND
2016-02-25	AD25739	ND
2016-09-08	AD48510	ND
2016-09-08	AD48512	ND
2017-03-09	AD74430	ND
2017-08-01	AD91611	ND
2017-08-01	AD91609	ND
2018-02-06	AE12498	ND
2018-08-02	AE35598	ND
2018-08-02	AE35600	ND
2019-02-07	AE53484	ND
2019-08-15	AE78986	ND
2019-08-15	AE78984	ND