Manganese

Roslyn WD

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	ND	3	0	ND
2016	ND	2	0	ND
2017	ND	3	0	ND
2018	ND	2	0	ND
2019	3.66 ppb	19	15	ND - 33.2 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
2014-02-11	1402494-002-SEC	ND
2014-05-16	1405C17-002-SEC	ND
2015-02-10	1502633-001-SEC	ND
2015-04-23	1504I52-002-SEC	ND
2015-06-09	1506722-002-SEC	ND
2016-02-11	1602917-001-SEC	ND
2016-06-01	1606082-001-SEC	ND
2017-03-08	7012866002-SEC	ND
2017-04-19	7016340004-SEC	ND
2017-06-06	7020426001-SEC	ND
2018-04-05	7047399001-SEC	ND
2018-05-30	7053122001-SEC	ND
2019-01-23	7077366001-SEC	ND
2019-03-28	7083725002-SEC	ND
2019-05-23	7090761012SEA1	6.00 ppb
2019-05-23	7090761016SEA1	3.00 ppb
2019-05-23	7090761010SEA1	0.500 ppb
2019-05-23	7090761004SEA1	ND
2019-05-23	7090761008SEA1	0.400 ppb
2019-05-23	7090761002SEA1	1.30 ppb
2019-05-23	7090761006SEA1	1.000 ppb
2019-05-23	7090761018SEA1	0.930 ppb
2019-06-14	7093737003-SEC	ND
2019-11-07	70111146002SEA2	3.20 ppb
2019-11-12	70111504009SEA2	2.10 ppb
2019-11-12	70111504007SEA2	0.820 ppb
2019-11-12	70111504008SEA2	6.80 ppb
2019-11-12	70111504010SEA2	33.2 ppb
2019-11-13	70111676003SEA2	2.80 ppb
2019-11-13	70111676002SEA2	2.30 ppb
2019-11-14	70111808001SEA2	5.10 ppb