Manganese

Covington County Water Authority

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	N/A	0	0	N/A
2015	N/A	0	0	N/A
2016	2.33 ppb	6	1	ND - 14.0 ppb
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	0.438 ppb	13	3	ND - 4.60 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
2016-01-04	160105029-6	ND
2016-01-04	160105029-5	ND
2016-01-04	160105029-1	ND
2016-01-04	160105029-3	ND
2016-01-04	160105029-4	ND
2016-01-04	160105029-2	14.0 ppb
2019-01-07	19010196-005	ND
2019-01-07	19010196-006	ND
2019-01-07	19010196-001	ND
2019-01-07	19010196-002	ND
2019-01-07	19010196-003	ND
2019-01-07	19010196-004	ND
2019-12-12	35518735001SEA1	ND
2019-12-12	35518735003SEA1	0.470 ppb
2019-12-12	35518735002SEA1	ND
2019-12-16	35519361002SEA1	ND
2019-12-16	35519361001SEA1	ND
2019-12-17	35519711001SEA1	0.630 ppb
2019-12-31	35521498001SEA1	4.60 ppb
2020-06-08	35555500001SEA2	ND
2020-06-08	35555500006SEA2	ND
2020-06-08	35555500004SEA2	ND
2020-06-08	35555500002SEA2	ND
2020-06-09	35555500005SEA2	ND
2020-06-09	35555500003SEA2	ND
2020-06-09	35555500007SEA2	7.40 ppb