Manganese

Leeds Water Board

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
2013	N/A	0	0	N/A
2014	N/A	0	0	N/A
2015	ND	7	0	ND
2016	N/A	0	0	N/A
2017	110.0 ppb	1	1	110.0 ppb
2018	ND	7	0	ND
2019	0.298 ppb	13	4	ND - 1.90 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
2015-07-20	1507-00297-5	ND
2015-07-20	1507-00297-6	ND
2015-07-20	1507-00297-3	ND
2015-07-20	1507-00297-2	ND
2015-07-20	1507-00297-1	ND
2015-07-20	1507-00297-4	ND
2015-08-17	1508-00190-1	ND
2017-10-04	1710-00071-1	110.0 ppb
2018-07-16	1807-00242-005	ND
2018-07-16	1807-00242-002	ND
2018-07-16	1807-00242-003	ND
2018-07-16	1807-00242-007	ND
2018-07-16	1807-00242-004	ND
2018-07-16	1807-00242-001	ND
2018-07-16	1807-00242-006	ND
2019-02-04	35445918001SEA1	ND
2019-02-04	35445918002SEA1	ND
2019-02-04	35445918006SEA1	ND
2019-02-04	35445918003SEA1	1.90 ppb
2019-02-04	35445918004SEA1	ND
2019-02-04	35445918005SEA1	0.520 ppb
2019-07-31	1907-00423-001	ND
2019-08-05	35487645006SEA2	ND
2019-08-05	35487645005SEA2	0.460 ppb
2019-08-05	35487645004SEA2	ND
2019-08-05	35487645003SEA2	1.000 ppb
2019-08-05	35487645002SEA2	ND
2019-08-05	35487645001SEA2	ND