Manganese

Notla 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	31.8 ppb	8	3	ND - 88.0 ppb
2015	ND	1	0	ND
2016	ND	5	0	ND
2017	ND	1	0	ND
2018	ND	1	0	ND
2019	2.81 ppb	10	5	ND - 11.0 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
2014-02-05	AI27639	ND
2014-02-05	AI27636	88.0 ppb
2014-02-05	AI27635	ND
2014-02-05	AI27634	ND
2014-02-05	AI27633	83.0 ppb
2014-02-05	AI27637	ND
2014-02-05	AI27638	83.0 ppb
2014-03-05	AI29390	ND
2015-02-04	AI64288	ND
2016-02-03	AJ05882	ND
2016-10-12	AJ31355	ND
2016-10-12	AJ31356	ND
2016-11-07	AJ32777	ND
2016-12-12	AJ36665	ND
2017-02-07	AJ46013	ND
2018-02-26	AJ84563	ND
2019-02-12	AK11112	ND
2019-06-12	AK19689	ND
2019-06-12	AK19691	ND
2019-06-12	AK19690	ND
2019-06-12	AK19688	ND
2019-09-23	35499916001SEA2	11.0 ppb
2019-12-02	35515759001SEA2	6.40 ppb
2019-12-02	35515759002SEA2	6.40 ppb
2019-12-02	35515759003SEA2	3.60 ppb
2019-12-02	35515759004SEA3	0.730 ppb
2020-02-19	35532057001SEA4	0.440 ppb