Manganese

Chatsworth

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	2	0	ND
2016	ND	3	0	ND
2017	ND	2	0	ND
2018	2.55 ppb	22	12	ND - 43.0 ppb
2019	ND	3	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
2014-01-13	AI26420	ND
2014-01-13	AI26421	ND
2015-02-03	AI64084	ND
2015-02-03	AI64085	ND
2016-02-02	AJ05436	ND
2016-02-02	AJ05437	ND
2016-02-23	AJ07002	ND
2017-02-13	AJ46323	ND
2017-02-13	AJ46324	ND
2018-02-07	AJ83485	43.0 ppb
2018-02-07	AJ83486	ND
2018-02-12	3870527	0.473 ppb
2018-02-12	3870100	1.18 ppb
2018-02-12	3870111	ND
2018-02-14	3872719	0.836 ppb
2018-05-01	3925844	ND
2018-05-01	3925736	1.44 ppb
2018-05-01	3925870	ND
2018-05-01	3925855	ND
2018-05-08	3931353	ND
2018-08-07	4014404	ND
2018-08-07	4014611	1.02 ppb
2018-08-07	4014450	0.834 ppb
2018-08-07	4014600	ND
2018-08-08	4016172	1.94 ppb
2018-08-09	4018611	ND
2018-11-05	4111266	1.53 ppb
2018-11-05	4111199	0.569 ppb
2018-11-07	4114225	0.948 ppb
2018-11-07	4114325	2.35 ppb
2018-11-13	4121285	ND
2019-02-04	AK10362	ND
2019-02-04	AK10359	ND
2019-03-05	AK12637	ND