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EWG's Tap Water Database — 2021 UPDATE

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Metolachlor

West Delta Water Supply Corporation

Metolachlor is a herbicide applied on corn, soybeans and other crops. The EPA has classified metolachlor as a possible human carcinogen.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.33 ppb32ND - 2.60 ppb
20150.300 ppb110.300 ppb
20166.80 ppb116.80 ppb
2017ND10ND
20180.600 ppb110.600 ppb
20194.50 ppb114.50 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2014-06-19Q1422285001ND
2014-09-24Q14476540042.60 ppb
2014-12-08Q14588490011.40 ppb
2015-10-15Q15405500030.300 ppb
2016-06-09Q16233030036.80 ppb
2017-08-22Q1737509005ND
2018-06-21Q18248810090.600 ppb
2019-08-26Q19594540014.50 ppb