Methoxychlor

Lexington Park

Methoxychlor is an endocrine-disrupting, neurotoxic insecticide similar to DDT. Banned in the U.S. in 2002, methoxychlor was historically used on farm animals and in animal feed, lumber, gardens and agricultural crops.

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	1	ND
2015	ND	1	ND
2016	ND	9	ND
2017	N/A	0	N/A
2018	ND	3	ND
2019	ND	11	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.09 ppb

The EWG Health Guideline of 0.09 ppb for methoxychlor 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 hormone disruption.

EPA Maximum Contaminant
Level (MCL) 40 ppb

The legal limit for methoxychlor, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-08-12	0180007_18_00061	ND
2015-08-17	E16000640003	ND
2016-08-25	E17000818004	ND
2016-08-25	E17000818002	ND
2016-08-31	E17000931001	ND
2016-09-21	E17001335002	ND
2016-09-21	E17001333002	ND
2016-09-21	E17001282001	ND
2016-09-21	E17001336001	ND
2016-09-21	E17001290001	ND
2016-09-26	E17001367001	ND
2018-05-30	E18004302001	ND
2018-05-30	E18004299001	ND
2018-05-30	E18004301001	ND
2019-06-20	E19004405001	ND
2019-06-20	E19004422001	ND
2019-06-20	E19004424001	ND
2019-08-12	E20000594026	ND
2019-08-12	E20000594006	ND
2019-08-12	E20000594011	ND
2019-08-12	E20000594021	ND
2019-08-12	E20000594016	ND
2019-08-12	E20000594001	ND
2019-09-23	E20001186001	ND
2019-09-23	E200001188001	ND