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EWG's Tap Water Database — 2021 UPDATE

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Methoxychlor

Missouri American St. Louis County & St. Charles County

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

 

115

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
2014ND200ND
2015ND200ND
2016ND150ND
2017ND200ND
2018ND200ND
2019ND200ND

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
2014-01-1524591301ND
2014-01-1524591701ND
2014-01-1524592401ND
2014-01-1524592901ND
2014-01-1524593101ND
2014-04-1525143101ND
2014-04-1525144001ND
2014-04-1525144301ND
2014-04-1625141301ND
2014-04-1625142201ND
2014-07-2226142901ND
2014-07-2226143601ND
2014-07-2226144401ND
2014-07-2226145201ND
2014-07-2226145501ND
2014-10-0827161801ND
2014-10-0927159601ND
2014-10-0927160101ND
2014-10-0927160901ND
2014-10-0927162101ND
2015-01-0627909601ND
2015-01-0627909801ND
2015-01-0727908001ND
2015-01-0727909101ND
2015-01-0727908401ND
2015-04-2228624601ND
2015-04-2228627301ND
2015-04-2228627601ND
2015-04-2228625501ND
2015-04-2228626401ND
2015-07-1329463501ND
2015-07-1329464401ND
2015-07-1329464701ND
2015-07-1629461801ND
2015-07-1629462601ND
2015-10-2630316401ND
2015-10-2630317701ND
2015-10-2730315501ND
2015-10-2730314901ND
2015-10-2930782501ND
2016-01-0530936501ND
2016-01-0530937101ND
2016-01-0530937301ND
2016-01-1130935201ND
2016-01-1130935701ND
2016-04-0531776201ND
2016-04-0531777201ND
2016-04-2031779501ND
2016-04-2031778201ND
2016-04-2031779201ND
2016-10-2833955301ND
2016-10-2833948101ND
2016-10-2833955001ND
2016-10-2833955101ND
2016-10-3133955201ND
2017-01-1034321501ND
2017-01-1134320201ND
2017-01-1134320701ND
2017-01-2034322101ND
2017-01-2034322301ND
2017-04-1135121901ND
2017-04-1135122801ND
2017-04-1135123101ND
2017-04-1935120901ND
2017-04-1935119901ND
2017-07-0436143701ND
2017-07-0436144601ND
2017-07-0436144901ND
2017-07-1436142201ND
2017-07-1436142901ND
2017-10-1637229401ND
2017-10-1737228101ND
2017-10-1737228601ND
2017-10-2437230301ND
2017-10-2437230601ND
2018-01-0938145501ND
2018-01-1838146001ND
2018-01-1838146201ND
2018-01-1938144401ND
2018-01-1938144801ND
2018-04-0639051701ND
2018-04-0639052601ND
2018-04-1639053501ND
2018-04-1639054301ND
2018-04-1639054601ND
2018-07-2340296901ND
2018-07-2340297201ND
2018-07-2440294501ND
2018-07-2440295201ND
2018-07-2640296001ND
2018-10-0941291001ND
2018-10-0941291501ND
2018-10-0941292301ND
2018-10-0941293201ND
2018-10-0941293501ND
2019-01-0942526401ND
2019-01-0942526801ND
2019-01-0942527501ND
2019-01-0942528001ND
2019-01-0942528201ND
2019-04-0843598201ND
2019-04-0843599201ND
2019-04-0943600101ND
2019-04-0943601101ND
2019-04-0943601201ND
2019-07-1045230701ND
2019-07-1045231701ND
2019-07-1045232701ND
2019-07-1045233901ND
2019-07-1045234001ND
2019-10-0746956801ND
2019-10-0746957401ND
2019-10-0746958201ND
2019-10-0746959101ND
2019-10-0746959301ND