Manganese

Louisville Water Company

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	ND	4	0	ND
2015	ND	4	0	ND
2016	ND	4	0	ND
2017	ND	4	0	ND
2018	1.70 ppb	8	6	ND - 5.04 ppb
2019	ND	4	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
2014-04-22	3013560R3	ND
2014-04-22	3012691R3	ND
2014-10-13	312152R3	ND
2014-10-13	3121540R3	ND
2015-04-20	3227762R2	ND
2015-04-20	3227752R2	ND
2015-10-12	3339165R3	ND
2015-10-12	3339156R3	ND
2016-04-11	3428196R3	ND
2016-04-11	3428204R3	ND
2016-10-11	3562569R3	ND
2016-10-11	3562578R3	ND
2017-04-11	3671728R2	ND
2017-04-11	3672126R2	ND
2017-10-09	3796020R2	ND
2017-10-09	3796035R2	ND
2018-02-13	3871145	2.32 ppb
2018-02-13	3870798	1.08 ppb
2018-05-08	3931181	2.10 ppb
2018-08-14	4022216	5.04 ppb
2018-08-14	4022179	0.649 ppb
2018-10-09	4083147R2	ND
2018-10-09	4083138R2	ND
2018-11-13	4120651	2.40 ppb
2019-04-08	4252603R2	ND
2019-04-08	4252594R2	ND
2019-10-14	4454967R2	ND
2019-10-14	4454957R2	ND