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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Knott County Water & Sewer District

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
20153.03 ppb72ND - 19.6 ppb
2016ND10ND
201720.0 ppb1120.0 ppb
2018ND10ND
2019ND10ND

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
2014-03-05201403108001ND
2015-01-07111012PND
2015-01-07311103PND
2015-03-18201503260001ND
2015-04-08112928PND
2015-04-08313026P1.60 ppb
2015-07-07114585QND
2015-07-07314677P19.6 ppb
2016-03-02201603029001ND
2017-03-0820170326600120.0 ppb
2018-03-07201802542001ND
2019-03-0519006328ND