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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Southwest Ouachita Waterworks Inc.

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

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
201510.00 ppb2210.00 ppb
2016N/A00N/A
20173.57 ppb142ND - 25.0 ppb
2018N/A00N/A
2019N/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
2014-06-16AD92406ND
2014-06-16AD92401ND
2014-06-16AD92406ND
2014-06-16AD92401ND
2014-10-20AD98770ND
2014-10-20AD98760ND
2014-10-20AD98765ND
2014-10-20AD98770ND
2014-10-20AD98775ND
2014-10-20AD98765ND
2014-10-20AD98760ND
2014-10-20AD98775ND
2015-01-05AE0085110.00 ppb
2015-01-05AE0085110.00 ppb
2017-06-1235318592003ND
2017-06-1235318592002ND
2017-06-1235318592001ND
2017-06-1235318592001ND
2017-06-1235318592002ND
2017-06-1235318592003ND
2017-10-1635343270002ND
2017-10-1635343270003ND
2017-10-1635343270002ND
2017-10-163534327000125.0 ppb
2017-10-1635343270004ND
2017-10-1635343270003ND
2017-10-163534327000125.0 ppb
2017-10-1635343270004ND
2020-01-08116556P0.440 ppb
2020-01-08116560PND
2020-01-08116559P0.620 ppb
2020-01-08116558PND
2020-01-08116557P0.440 ppb
2020-01-08116555P0.460 ppb
2020-07-08119673PND
2020-07-08119672PND
2020-07-08119674PND
2020-07-08119671PND
2020-07-08119675PND
2020-07-08119676PND