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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Maynard DPW, Water Division

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

 

104

Samples

0

Samples exceeding legal limit (MCL)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014127.4 ppb155ND - 1,100.0 ppb
2015131.9 ppb157ND - 1,100.0 ppb
201625.7 ppb141ND - 360.0 ppb
2017131.3 ppb153ND - 1,060.0 ppb
2018275.2 ppb208ND - 1,340.0 ppb
2019290.9 ppb1910ND - 1,110.0 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 Result
2014-03-06ND
2014-03-06ND
2014-03-18ND
2014-05-14ND
2014-05-14ND
2014-05-141,100.0 ppb
2014-05-14320.0 ppb
2014-05-287.30 ppb
2014-05-28480.0 ppb
2014-09-163.60 ppb
2014-09-16ND
2014-09-16ND
2014-12-16ND
2014-12-16ND
2014-12-16ND
2015-02-24ND
2015-02-247.10 ppb
2015-02-24ND
2015-06-164.00 ppb
2015-06-16ND
2015-06-161,100.0 ppb
2015-06-16500.0 ppb
2015-06-23ND
2015-06-23360.0 ppb
2015-09-152.90 ppb
2015-09-15ND
2015-09-15ND
2015-12-174.80 ppb
2015-12-17ND
2015-12-17ND
2016-03-15ND
2016-03-15ND
2016-03-15ND
2016-06-20ND
2016-06-20360.0 ppb
2016-09-21ND
2016-09-21ND
2016-09-21ND
2016-10-31ND
2016-10-31ND
2016-12-14ND
2016-12-14ND
2016-12-29ND
2016-12-29ND
2017-03-23ND
2017-03-23ND
2017-03-28ND
2017-05-25ND
2017-05-25ND
2017-05-25ND
2017-05-251,060.0 ppb
2017-05-25475.0 ppb
2017-05-25434.0 ppb
2017-09-20ND
2017-09-20ND
2017-09-20ND
2017-12-26ND
2017-12-27ND
2017-12-27ND
2018-01-18ND
2018-01-19ND
2018-01-19ND
2018-05-22ND
2018-05-22ND
2018-05-22ND
2018-05-221,100.0 ppb
2018-05-22551.0 ppb
2018-05-22362.0 ppb
2018-07-19ND
2018-07-191,060.0 ppb
2018-07-24ND
2018-07-24432.0 ppb
2018-07-31ND
2018-07-31310.0 ppb
2018-07-31348.0 ppb
2018-10-29ND
2018-10-29ND
2018-10-29ND
2018-12-141,340.0 ppb
2019-02-25ND
2019-03-11ND
2019-03-11ND
2019-04-03947.0 ppb
2019-04-03456.0 ppb
2019-05-06ND
2019-05-06441.0 ppb
2019-05-13ND
2019-05-13ND
2019-05-13970.0 ppb
2019-05-13442.0 ppb
2019-08-2010.2 ppb
2019-09-1029.0 ppb
2019-09-10ND
2019-11-06ND
2019-11-06ND
2019-11-0612.0 ppb
2019-12-051,110.0 ppb
2019-12-051,110.0 ppb
2020-04-14247.0 ppb
2020-04-141.20 ppb
2020-04-140.960 ppb
2020-10-22157.0 ppb
2020-10-220.630 ppb
2020-10-222.40 ppb