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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Alameda County Water 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.

MORE ABOUT THIS CONTAMINANT

 

110

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND150ND
20153.58 ppb171ND - 60.9 ppb
20161.58 ppb161ND - 25.2 ppb
2017ND160ND
2018ND160ND
20191.21 ppb3014ND - 8.90 ppb

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
2014-03-045401-038-0925ND
2014-03-045401-040-0845ND
2014-03-045401-041-0930ND
2014-03-045401-053-0955ND
2014-04-295401-038-1005ND
2014-04-295401-041-1000ND
2014-04-295401-053-1025ND
2014-07-215401-038-0955ND
2014-07-215401-041-0955ND
2014-07-225401-040-0925ND
2014-07-225401-053-0905ND
2014-10-145401-038-1000ND
2014-10-145401-040-0900ND
2014-10-145401-041-1025ND
2014-10-145401-053-1145ND
2015-01-275401-038-0955ND
2015-01-275401-040-101560.9 ppb
2015-01-275401-041-0945ND
2015-01-275401-053-1047ND
2015-04-215401-038-0945ND
2015-04-215401-040-0910ND
2015-04-215401-041-0935ND
2015-04-215401-053-1010ND
2015-06-095401-015-1120ND
2015-07-065401-038-1000ND
2015-07-065401-040-1105ND
2015-07-065401-041-0921ND
2015-07-215401-053-0905ND
2015-10-205401-038-1035ND
2015-10-205401-040-0940ND
2015-10-205401-041-1025ND
2015-10-205401-053-1115ND
2016-01-195401-038-0855ND
2016-01-195401-040-1035ND
2016-01-195401-041-091025.2 ppb
2016-01-195401-053-0935ND
2016-04-265401-038-1035ND
2016-04-265401-040-0945ND
2016-04-265401-041-1025ND
2016-05-105401-053-0915ND
2016-07-115401-038-0850ND
2016-07-115401-041-0820ND
2016-07-195401-040-0825ND
2016-07-195401-053-0955ND
2016-10-045401-038-0905ND
2016-10-045401-040-0825ND
2016-10-045401-041-0855ND
2016-10-045401-053-0925ND
2017-01-175401-038-0925ND
2017-01-175401-040-0937ND
2017-01-175401-041-0925ND
2017-01-175401-053-1025ND
2017-04-185401-038-0925ND
2017-04-185401-040-0820ND
2017-04-185401-041-0910ND
2017-04-185401-053-0948ND
2017-07-175401-038-1030ND
2017-07-175401-041-1005ND
2017-07-255401-040-0915ND
2017-07-255401-053-1032ND
2017-10-035401-038-0915ND
2017-10-035401-040-0857ND
2017-10-035401-041-0925ND
2017-10-035401-053-0958ND
2018-01-165401-038-1110ND
2018-01-165401-040-0920ND
2018-01-165401-041-1025ND
2018-01-165401-053-1050ND
2018-04-175401-038-0926ND
2018-04-175401-040-0835ND
2018-04-175401-041-0939ND
2018-04-175401-053-1003ND
2018-07-115401-038-0726ND
2018-07-115401-041-0755ND
2018-07-175401-040-0850ND
2018-07-175401-053-0845ND
2018-10-165401-038-0950ND
2018-10-165401-040-0820ND
2018-10-165401-041-1005ND
2018-10-165401-053-1035ND
2019-02-055401-038-0940ND
2019-02-055401-040-0820ND
2019-02-055401-041-0930ND
2019-02-055401-053-1000ND
2019-02-122019021302651.20 ppb
2019-02-122019021302668.90 ppb
2019-02-122019021302670.920 ppb
2019-04-092019041002000.990 ppb
2019-05-072019050804473.60 ppb
2019-05-072019050804482.90 ppb
2019-05-072019050804491.80 ppb
2019-05-135401-053-0955ND
2019-05-145401-038-0900ND
2019-05-145401-040-0815ND
2019-05-145401-041-0915ND
2019-07-165401-038-0935ND
2019-07-165401-040-0755ND
2019-07-165401-041-1000ND
2019-07-165401-053-1030ND
2019-08-132019081405743.30 ppb
2019-08-132019081405750.580 ppb
2019-08-132019081405762.10 ppb
2019-10-082019100905400.850 ppb
2019-10-155401-038-0925ND
2019-10-155401-040-0825ND
2019-10-155401-041-0910ND
2019-10-155401-053-1000ND
2019-11-192019112002145.10 ppb
2019-11-192019112002151.60 ppb
2019-11-192019112002162.60 ppb