Manganese

Intracoastal Water System West

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	97.4 ppb	8	8	3.50 ppb - 150.0 ppb
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	72.0 ppb	10	8	ND - 160.0 ppb
2019	ND	2	0	ND

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
2014-03-10	AD89555	ND
2014-03-10	AD89555	ND
2015-03-23	35181102002	3.50 ppb
2015-03-23	35181102002	3.50 ppb
2015-10-14	35212298002	140.0 ppb
2015-10-14	35212298001	150.0 ppb
2015-10-14	35212298002	140.0 ppb
2015-10-14	35212298003	96.0 ppb
2015-10-14	35212298001	150.0 ppb
2015-10-14	35212298003	96.0 ppb
2016-02-15	35230016002	ND
2016-02-15	35230016002	ND
2017-02-27	AE13160	ND
2017-02-27	AE13160	ND
2018-02-19	AE20630	10.00 ppb
2018-02-19	AE20630	10.00 ppb
2018-05-07	AE21639	ND
2018-05-07	AE21639	ND
2018-07-09	AE22022	100.0 ppb
2018-07-09	AE22030	90.0 ppb
2018-07-09	AE22026	160.0 ppb
2018-07-09	AE22022	100.0 ppb
2018-07-09	AE22030	90.0 ppb
2018-07-09	AE22026	160.0 ppb
2019-01-16	B1900256-001	ND
2019-01-16	B1900256-001	ND