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EWG's Tap Water Database — 2019 UPDATE

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Methoxychlor

California Water Service Company - Dominguez

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015ND140ND
2016ND30ND
2017ND20ND

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
2015-05-069590-004-1515ND
2015-05-069590-019-1015ND
2015-05-069590-036-1435ND
2015-05-069590-024-1050ND
2015-05-069590-023-1325ND
2015-05-139590-050-1250ND
2015-05-209590-016-1312ND
2015-05-209590-022-1330ND
2015-08-059590-050-1147ND
2015-08-129590-004-1140ND
2015-08-129590-036-1322ND
2015-08-129590-023-1115ND
2015-08-129590-019-1005ND
2015-08-199590-024-1040ND
2016-03-239590-018-1340ND
2016-08-249590-018-1015ND
2016-12-289590-019-0930ND
2017-03-089590-019-1430ND
2017-10-169590-805-1030ND