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EWG's Tap Water Database — 2019 UPDATE

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Manganese

Water District 1 of Johnson County

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND30ND
20140.633 ppb31ND - 1.90 ppb
20150.467 ppb31ND - 1.40 ppb
20160.533 ppb31ND - 1.60 ppb
20171.10 ppb31ND - 3.30 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
2012-03-06576121WSND
2012-03-06576120WSND
2012-05-29579491WSND
2013-03-05592969WSND
2013-03-05592968WSND
2013-05-14596073WSND
2014-03-0470260ND
2014-03-04702471.90 ppb
2014-05-13113433ND
2015-05-043225861.40 ppb
2015-05-04322585ND
2015-05-04322584ND
2016-05-17548023ND
2016-05-175480221.60 ppb
2016-06-20566734ND
2017-02-14708552ND
2017-02-14708551ND
2017-02-147085503.30 ppb