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EWG's Tap Water Database — 2021 UPDATE

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Manganese

West Monroe Water System

Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.

MORE ABOUT THIS CONTAMINANT

 

36

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
2014ND120ND
2015N/A00N/A
2016N/A00N/A
2017ND120ND
20182.30 ppb222.30 ppb
20191.08 ppb54ND - 3.11 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 100 ppb

The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-17AD89846ND
2014-03-17AD89841ND
2014-03-17AD89846ND
2014-03-17AD89841ND
2014-09-02AD96385ND
2014-09-02AD96380ND
2014-09-02AD96385ND
2014-09-02AD96390ND
2014-09-02AD96380ND
2014-09-02AD96390ND
2014-09-04AD96489ND
2014-09-04AD96489ND
2017-03-1535301204006ND
2017-03-1535301204006ND
2017-03-2235302309005ND
2017-03-2235302309005ND
2017-09-0535334988002ND
2017-09-0535334988003ND
2017-09-0535334988001ND
2017-09-0535334988001ND
2017-09-0535334988002ND
2017-09-0535334988003ND
2017-09-1835337315002ND
2017-09-1835337315002ND
2018-07-16354053190012.30 ppb
2018-07-16354053190012.30 ppb
2019-11-1944916021.47 ppb
2019-11-1944915303.11 ppb
2019-11-194491520ND
2019-11-1944914920.412 ppb
2019-11-1944915010.404 ppb
2020-05-1446282991.25 ppb
2020-05-1446285170.558 ppb
2020-05-144628445ND
2020-05-1446283530.534 ppb
2020-05-144629019ND