Manganese

Serrano Water District

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	7.78 ppb	9	2	ND - 39.0 ppb
2015	ND	12	0	ND
2016	12.0 ppb	31	13	ND - 44.0 ppb
2017	8.29 ppb	7	2	ND - 34.0 ppb
2018	7.82 ppb	11	2	ND - 65.0 ppb
2019	16.0 ppb	9	4	ND - 66.0 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
2014-01-30	3761-008-1100	ND
2014-03-27	3761-008-0930	ND
2014-04-24	3761-008-0950	39.0 ppb
2014-05-29	3761-008-1040	31.0 ppb
2014-07-10	3761-008-1230	ND
2014-08-21	3761-008-1200	ND
2014-09-25	3761-008-1130	ND
2014-11-20	3761-008-0945	ND
2014-12-30	3761-008-0830	ND
2015-02-19	3761-008-0930	ND
2015-03-25	3761-008-1100	ND
2015-04-30	3761-008-1110	ND
2015-05-06	4417-005-0920	ND
2015-05-28	3761-008-1030	ND
2015-06-04	3761-008-1115	ND
2015-07-29	3761-008-1000	ND
2015-08-20	3761-008-1010	ND
2015-09-30	3761-008-1100	ND
2015-10-29	3761-008-1100	ND
2015-11-18	3761-008-0930	ND
2015-12-23	3761-008-1000	ND
2016-01-28	3761-008-1015	ND
2016-02-29	3761-008-0000	ND
2016-04-07	3761-008-0920	21.0 ppb
2016-04-14	3761-008-1150	ND
2016-04-20	3761-008-1000	33.0 ppb
2016-04-28	3761-008-1000	21.0 ppb
2016-05-05	3761-008-1100	ND
2016-05-12	3761-008-1000	ND
2016-05-17	3761-008-0000	ND
2016-05-26	3761-008-1115	ND
2016-06-02	3761-008-0945	ND
2016-06-09	3761-008-0000	ND
2016-06-13	4417-007-0925	ND
2016-06-30	3761-008-0900	ND
2016-07-07	3761-008-1030	23.0 ppb
2016-07-14	3761-008-1030	ND
2016-07-21	3761-008-1115	ND
2016-07-28	3761-008-0920	ND
2016-08-04	3761-008-0920	ND
2016-08-11	3761-008-1020	ND
2016-08-18	3761-008-1030	24.0 ppb
2016-09-01	3761-008-1000	28.0 ppb
2016-09-08	3761-008-1030	35.0 ppb
2016-09-15	3761-008-0930	25.0 ppb
2016-09-22	3761-008-1000	44.0 ppb
2016-09-29	3761-008-0930	26.0 ppb
2016-10-06	3761-008-1030	24.0 ppb
2016-10-13	3761-008-1020	ND
2016-10-27	3761-008-1030	ND
2016-11-10	3761-008-0900	38.0 ppb
2016-12-15	3761-008-0755	29.0 ppb
2017-02-23	3761-008-1100	24.0 ppb
2017-05-10	3761-008-1000	ND
2017-06-29	3761-008-1030	ND
2017-07-26	3761-008-0955	ND
2017-09-28	3761-008-0830	ND
2017-10-26	3761-008-0930	ND
2017-11-30	3761-008-0910	34.0 ppb
2018-01-18	3761-008-1010	ND
2018-02-28	3761-008-1550	ND
2018-05-10	3761-008-1000	ND
2018-06-21	3761-008-0955	21.0 ppb
2018-06-28	4417-005-0850	ND
2018-07-26	3761-008-1000	65.0 ppb
2018-08-27	4417-005-1105	ND
2018-09-20	3761-008-0930	ND
2018-11-29	3761-008-0930	ND
2018-12-04	4417-005-0925	ND
2018-12-20	3761-008-0800	ND
2019-02-06	4417-007-1245	ND
2019-02-14	3761-008-1000	ND
2019-03-28	3761-008-0900	ND
2019-04-11	3761-008-0930	ND
2019-08-22	3761-008-1030	ND
2019-09-19	3761-008-1000	23.0 ppb
2019-10-29	3761-008-0000	66.0 ppb
2019-11-21	3761-008-1030	20.0 ppb
2019-12-23	3761-008-0830	35.0 ppb