Manganese

City of California City

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	2.40 ppb	5	1	ND - 12.0 ppb
2015	N/A	0	0	N/A
2016	29.0 ppb	1	1	29.0 ppb
2017	ND	5	0	ND
2018	11.0 ppb	1	1	11.0 ppb
2019	1.73 ppb	7	3	ND - 8.90 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
2014-08-25	5806-005-1400	ND
2014-08-25	5806-006-1320	12.0 ppb
2014-08-25	5806-008-1345	ND
2014-08-25	5806-009-1310	ND
2014-08-25	5806-016-1335	ND
2016-12-15	5806-003-0920	29.0 ppb
2017-08-01	5806-005-1100	ND
2017-08-01	5806-006-1135	ND
2017-08-01	5806-008-1000	ND
2017-08-01	5806-009-1030	ND
2017-08-01	5806-016-0925	ND
2018-04-26	5806-003-1140	11.0 ppb
2019-12-16	A9K0954-01	ND
2019-12-17	A9K0954-07	8.90 ppb
2019-12-17	A9K0954-02	0.540 ppb
2019-12-17	A9K0954-03	ND
2019-12-17	A9K0954-06	ND
2019-12-17	A9K0954-04	2.70 ppb
2019-12-17	A9K0954-05	ND
2020-03-04	ADB0818-01	ND
2020-06-16	ADE1010-07	11.0 ppb
2020-06-16	ADE1010-06	ND
2020-06-16	ADE1010-05	1.40 ppb
2020-06-16	ADE1010-04	1.90 ppb
2020-06-16	ADE1010-03	ND
2020-06-16	ADE1010-02	0.990 ppb
2020-06-16	ADE1010-01	ND
2020-09-15	ADH1219-01	ND