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EWG's Tap Water Database — 2021 UPDATE

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Manganese

City of Norfolk

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.625 ppb81ND - 5.00 ppb
20150.250 ppb81ND - 2.00 ppb
20161.38 ppb84ND - 4.00 ppb
2017ND80ND
20180.375 ppb81ND - 3.00 ppb
2019ND80ND

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
2014-02-1114026242-METND
2014-02-1114026243-METND
2014-05-1314050227-MET5.00 ppb
2014-05-1314050226-METND
2014-08-1214083424-METND
2014-08-1214083425-METND
2014-11-1214116687-METND
2014-11-1214116688-METND
2015-02-1000225-CITY OF NO2.00 ppb
2015-02-1000225-CITY OF NOND
2015-05-1200225-CITY OF NOND
2015-05-1200225-CITY OF NOND
2015-08-1100225-CITY OF NOND
2015-08-1100225-CITY OF NOND
2015-11-0900225-CITY OF NOND
2015-11-0900225-CITY OF NOND
2016-02-0916022727-METND
2016-02-0916022731-METND
2016-05-1016055887-MET2.00 ppb
2016-05-1016055886-METND
2016-08-0916089083-MET4.00 ppb
2016-08-0916089082-MET2.00 ppb
2016-11-0816112159-MET3.00 ppb
2016-11-0816112157-METND
2017-02-1417025479-METND
2017-02-1417025480-METND
2017-05-0917058219-METND
2017-05-0917058221-METND
2017-08-0817081354-METND
2017-08-0817081356-METND
2017-11-1417114482-METND
2017-11-1417114487-METND
2018-02-1318027240-METND
2018-02-1318027216-METND
2018-05-0818059822-METND
2018-05-0818059848-MET3.00 ppb
2018-08-1418083057-METND
2018-08-1418083080-METND
2018-11-1318115917-METND
2018-11-1318115939-METND
2019-02-1219028665-METND
2019-02-1219028693-METND
2019-05-1419052479-METND
2019-05-1419052502-METND
2019-08-1319085324-METND
2019-08-1319085353-METND
2019-11-1219118087-METND
2019-11-1219118057-METND