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EWG's Tap Water Database — 2021 UPDATE

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Methoxychlor

City of Katy

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND50ND
2015ND50ND
2016ND60ND
2017ND60ND
2018ND50ND
2019ND50ND

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
2014-07-25AC61158ND
2014-07-25AC61157ND
2014-07-25AC61161ND
2014-07-25AC61162ND
2014-10-27AC70544ND
2015-01-20AC76879ND
2015-01-20AC76880ND
2015-01-20AC76881ND
2015-01-20AC76884ND
2015-01-20AC76876ND
2016-01-14AD18389ND
2016-01-14AD18376ND
2016-01-14AD18370ND
2016-01-14AD18373ND
2016-01-14AD18381ND
2016-03-15AD28898ND
2017-02-09AD70096ND
2017-02-09AD70093ND
2017-02-09AD70092ND
2017-02-09AD70095ND
2017-02-09AD70094ND
2017-02-09AD70097ND
2018-01-08AE08194ND
2018-01-08AE08195ND
2018-01-08AE08197ND
2018-01-08AE08193ND
2018-01-08AE08196ND
2019-01-14AE49685ND
2019-01-14AE49687ND
2019-01-14AE49684ND
2019-01-14AE49683ND
2019-01-14AE49682ND