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EWG's Tap Water Database — 2019 UPDATE

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Manganese

Clayton County Water Authority

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201216.3 ppb31ND - 49.0 ppb
2013ND20ND
2014ND20ND
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-05-23AH65282ND
2012-05-23AH65281ND
2012-08-07AH7343249.0 ppb
2013-04-16AH99138ND
2013-04-16AH99137ND
2014-02-10AI27804ND
2014-02-10AI27803ND
2015-02-17AI65011ND
2015-02-17AI65010ND
2016-01-19AJ04642ND
2016-01-19AJ04641ND
2017-01-18AJ39660ND
2017-01-18AJ39659ND