Manganese

Monroe County Water Authority (MCWA)

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	ND	2	0	ND
2015	N/A	0	0	N/A
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	1.71 ppb	7	2	ND - 10.00 ppb
2019	1.50 ppb	13	5	ND - 6.30 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
2014-04-12	481240SEC	ND
2014-05-12	481222SEC	ND
2016-05-11	589767SEC2016	ND
2016-05-11	201605110439SEC	ND
2017-05-10	201705110595SEC	ND
2017-05-11	201705110547SEC	ND
2018-05-10	201805110521SEC	ND
2018-05-10	201805110629SEC	ND
2018-11-07	201811080873	ND
2018-11-07	201811080885	10.00 ppb
2018-11-07	201811080876	2.00 ppb
2018-11-07	201811080874	ND
2018-11-07	201811080875	ND
2019-02-14	201902150268	ND
2019-02-14	201902150270	6.30 ppb
2019-02-14	201902150269	ND
2019-02-14	201902150267	ND
2019-05-09	201905100126	ND
2019-05-09	201905100127	ND
2019-05-09	201905100106	ND
2019-05-09	201905100242	4.90 ppb
2019-05-09	201905100133	6.00 ppb
2019-08-08	201908090588	1.50 ppb
2019-08-08	201908090589	ND
2019-08-08	201908090587	ND
2019-08-08	201908090590	0.770 ppb