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EWG's Tap Water Database — 2019 UPDATE

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Manganese

Cary

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.538 ppb82ND - 2.30 ppb
2013N/A00N/A
2014N/A00N/A
20151.66 ppb85ND - 3.50 ppb
2016N/A00N/A
2017N/A00N/A

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
2012-10-162102832-01ND
2012-10-162102832-02ND
2012-10-162102832-03ND
2012-10-162102832-04ND
2012-10-162102832-052.30 ppb
2012-10-162102832-06ND
2012-10-162102832-072.00 ppb
2012-10-162102832-08ND
2015-11-195113106-01ND
2015-11-195113106-02ND
2015-11-195113111-012.90 ppb
2015-11-195113111-02ND
2015-11-195113102-013.20 ppb
2015-11-195113102-021.000 ppb
2015-11-235113717-013.50 ppb
2015-11-235113717-022.70 ppb