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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Covina Irrigating Company

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.

MORE ABOUT THIS CONTAMINANT

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND30ND
2016ND30ND
2017ND20ND
2018ND50ND
2019ND90ND

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
2014-04-289588-012-0815ND
2014-07-079588-003-1045ND
2014-07-079588-002-1035ND
2014-07-079588-001-1025ND
2014-10-069588-012-0940ND
2014-10-069588-008-1202ND
2015-04-069588-008-1122ND
2015-07-079588-002-1055ND
2015-07-079588-003-1105ND
2016-01-049588-002-1015ND
2016-04-119588-012-0855ND
2016-10-039588-012-0930ND
2017-04-039588-012-0840ND
2017-10-029588-012-0925ND
2018-04-029588-012-0920ND
2018-08-089588-002-1408ND
2018-08-109588-001-1310ND
2018-08-109588-003-1330ND
2018-10-019588-012-0924ND
2019-04-019588-012-1008ND
2019-04-109588-008-1115ND
2019-07-019588-001-1005ND
2019-07-019588-002-1015ND
2019-07-019588-003-1030ND
2019-10-039588-001-1445ND
2019-10-039588-003-1430ND
2019-10-049588-002-1300ND
2019-10-079588-012-0850ND