Manganese

Rockaway Twp Water Department

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	14.0 ppb	4	3	ND - 28.0 ppb
2015	11.4 ppb	1	1	11.4 ppb
2016	1.80 ppb	1	1	1.80 ppb
2017	2.57 ppb	3	2	ND - 6.90 ppb
2018	6.60 ppb	5	2	ND - 28.0 ppb
2019	6.15 ppb	10	4	ND - 39.6 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
2014-06-09	340609062.2	18.0 ppb
2014-06-09	340609061.2	ND
2014-06-09	340609063.2	28.0 ppb
2014-07-01	340701108	10.00 ppb
2015-07-14	N027759-01	11.4 ppb
2016-07-18	N037869-04	1.80 ppb
2017-07-24	N052478-05	0.800 ppb
2017-07-24	N052478-04	6.90 ppb
2017-07-24	N052478-06	ND
2018-07-16	380717204	ND
2018-07-16	380717205	ND
2018-08-16	380816190	5.00 ppb
2018-08-16	380816193	ND
2018-08-16	380816194	28.0 ppb
2019-06-10	4320562	2.44 ppb
2019-06-10	4320607	ND
2019-06-10	4320584	ND
2019-06-10	4320368	9.85 ppb
2019-07-10	390710205	ND
2019-07-10	390710206	ND
2019-12-18	4521440	39.6 ppb
2019-12-18	4521598	ND
2019-12-18	4521602	ND
2019-12-18	4521397	9.64 ppb