Manganese

USMC - 29 Palms

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	N/A	0	0	N/A
2015	7.86 ppb	7	1	ND - 55.0 ppb
2016	8.00 ppb	3	1	ND - 24.0 ppb
2017	N/A	0	0	N/A
2018	22.6 ppb	15	8	ND - 110.0 ppb
2019	N/A	0	0	N/A

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
2015-01-26	4790-001-1100	ND
2015-01-26	4790-013-1140	ND
2015-01-26	4790-004-1330	55.0 ppb
2015-01-26	4790-011-1450	ND
2015-01-26	4790-005-1200	ND
2015-01-26	4790-010-1245	ND
2015-03-02	4790-003-1100	ND
2016-05-11	4790-006-1050	ND
2016-05-11	4790-008-1110	24.0 ppb
2016-05-11	4790-007-1130	ND
2018-02-27	4790-001-1140	110.0 ppb
2018-02-27	4790-013-1120	27.0 ppb
2018-02-27	4790-007-1320	ND
2018-02-27	4790-006-1255	ND
2018-02-27	4790-005-1200	ND
2018-02-27	4790-004-1230	42.0 ppb
2018-02-27	4790-003-1100	23.0 ppb
2018-02-28	4790-008-1145	ND
2018-02-28	4790-009-1200	ND
2018-02-28	4790-010-1100	50.0 ppb
2018-02-28	4790-011-1130	ND
2018-03-21	4790-010-1200	34.0 ppb
2018-03-21	4790-001-1130	53.0 ppb
2018-03-28	B8C2783-01	0.500 ppb
2018-09-11	B8I1225-01	ND