Trichlorofluoromethane

Clark Public Utilities

Trichlorofluoromethane (Freon 11) is a refrigerant, solvent and aerosol propellant banned in 2000 under the Montreal Protocol because of its ozone-depleting properties. Freons can cause heart, nervous system and liver damage.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	ND	7	ND
2015	ND	1	ND
2016	ND	7	ND
2017	ND	7	ND
2018	ND	11	ND
2019	ND	4	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1,300 ppb

The EWG Health Guideline of 1,300 ppb for trichlorofluoromethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-08-26	91031	ND
2014-10-27	20682	ND
2014-10-27	20681	ND
2014-12-03	35981	ND
2014-12-03	35983	ND
2014-12-03	35985	ND
2014-12-03	35982	ND
2015-06-11	72701	ND
2016-07-12		ND
2016-07-12		ND
2016-08-24		ND
2016-08-24		ND
2016-09-06		ND
2016-09-14		ND
2016-09-28		ND
2017-07-07		ND
2017-07-07		ND
2017-07-07		ND
2017-07-07		ND
2017-07-07		ND
2017-07-27		ND
2017-12-28		ND
2018-08-01		ND
2018-08-01		ND
2018-08-01		ND
2018-08-01		ND
2018-08-01		ND
2018-08-28		ND
2018-08-28		ND
2018-09-18		ND
2018-09-18		ND
2018-09-18		ND
2018-11-18		ND
2019-02-24		ND
2019-02-24		ND
2019-07-22		ND
2019-09-05		ND