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EWG's Tap Water Database

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Manganese

Grayson Utility Commission

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201015.0 ppb2210.00 ppb - 20.0 ppb
2011ND20ND
2012ND10ND
2013ND10ND
2014ND10ND
20151.000 ppb21ND - 2.00 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 100 ppb

The health guideline of 100 ppb for manganese was defined by the State of Minnesota as a risk assessment advisory level, a non-enforceable guideline. This health guideline protects against harm to the brain and nervous system.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-03-0220100223800110.00 ppb
2010-09-0720100913400120.0 ppb
2011-03-22201103145001ND
2011-09-13201110674001ND
2012-03-13201202963001ND
2013-03-19201303442001ND
2014-03-04201403039001ND
2015-03-03201825040012.00 ppb
2015-03-03201502504001ND