Manganese

La Verne WD

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	ND	9	0	ND
2017	11.5 ppb	2	1	ND - 23.0 ppb
2018	N/A	0	0	N/A
2019	ND	8	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
2016-02-03	4790-009-1048	ND
2016-02-03	4790-010-1043	ND
2016-02-03	4790-016-1143	ND
2016-02-10	4790-008-1018	ND
2016-02-10	4790-039-0915	ND
2016-02-10	4790-032-1146	ND
2016-02-17	4790-046-1140	ND
2016-02-24	4790-012-0921	ND
2016-11-03	4790-018-1000	ND
2017-03-22	4790-018-1345	23.0 ppb
2017-08-03	4790-018-0750	ND
2019-03-20	4790-008-0800	ND
2019-03-20	4790-046-0700	ND
2019-03-20	4790-039-0915	ND
2019-03-20	4790-016-0905	ND
2019-03-20	4790-012-0930	ND
2019-03-20	4790-010-0730	ND
2019-03-20	4790-009-0830	ND
2019-03-20	4790-032-1145	ND
2020-02-05	C0B0641-02	0.670 ppb
2020-02-05	C0B0641-04	0.780 ppb
2020-02-05	C0B0641-03	1.20 ppb
2020-02-05	C0B0641-01	ND
2020-05-06	C0E0883-02	1.10 ppb
2020-05-06	C0E0883-01	1.60 ppb
2020-05-06	C0E0883-03	1.30 ppb
2020-08-05	C0H0801-01	0.670 ppb
2020-08-05	C0H0801-02	0.710 ppb
2020-08-05	C0H0801-03	ND
2020-08-05	C0H0801-04	0.750 ppb
2020-11-04	C0K0616-01	0.900 ppb
2020-11-04	C0K0616-02	0.870 ppb
2020-11-04	C0K0616-03	1.10 ppb