Manganese

City of Davis

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

169

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	11.6 ppb	30	6	ND - 110.0 ppb
2015	6.36 ppb	28	4	ND - 46.0 ppb
2016	5.88 ppb	26	4	ND - 45.0 ppb
2017	7.70 ppb	23	4	ND - 54.0 ppb
2018	15.9 ppb	41	22	ND - 190.0 ppb
2019	9.00 ppb	21	7	ND - 33.0 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
2014-01-14	5810-056-0847	ND
2014-02-12	5810-052-1007	45.0 ppb
2014-02-13	5810-028-1130	110.0 ppb
2014-04-01	5810-056-1005	ND
2014-05-13	5810-052-0754	48.0 ppb
2014-05-13	5810-056-0720	ND
2014-06-10	5810-056-0720	ND
2014-07-08	5810-056-0712	ND
2014-08-05	5810-002-0822	ND
2014-08-05	5810-004-0810	ND
2014-08-05	5810-006-0837	ND
2014-08-05	5810-009-1120	47.0 ppb
2014-08-05	5810-014-0950	ND
2014-08-05	5810-015-1036	ND
2014-08-05	5810-016-0853	ND
2014-08-05	5810-018-0753	ND
2014-08-05	5810-019-0737	ND
2014-08-05	5810-020-0657	ND
2014-08-05	5810-023-0720	ND
2014-08-05	5810-024-1025	ND
2014-08-05	5810-025-1000	ND
2014-08-05	5810-030-1059	ND
2014-08-05	5810-052-0935	52.0 ppb
2014-08-05	5810-056-0708	ND
2014-08-07	5810-056-0927	ND
2014-09-09	5810-056-0743	ND
2014-10-07	5810-056-0834	ND
2014-11-04	5810-052-0856	46.0 ppb
2014-11-04	5810-056-0716	ND
2014-12-02	5810-056-0735	ND
2015-01-06	5810-056-0750	ND
2015-02-10	5810-052-0713	46.0 ppb
2015-02-10	5810-056-1015	ND
2015-03-17	5810-056-0930	ND
2015-04-07	5810-056-0731	ND
2015-05-05	5810-052-0600	44.0 ppb
2015-05-05	5810-056-0450	ND
2015-06-02	5810-056-0700	ND
2015-07-07	5810-002-1333	ND
2015-07-07	5810-004-1253	ND
2015-07-07	5810-006-1115	ND
2015-07-07	5810-015-1321	ND
2015-07-07	5810-016-0957	ND
2015-07-07	5810-018-0721	ND
2015-07-07	5810-020-0757	ND
2015-07-07	5810-023-0904	ND
2015-07-07	5810-024-1120	ND
2015-07-07	5810-025-0832	ND
2015-07-07	5810-030-0919	ND
2015-07-07	5810-052-0648	44.0 ppb
2015-07-07	5810-056-0829	ND
2015-07-21	5810-009-0747	ND
2015-08-11	5810-056-0715	ND
2015-09-01	5810-056-0724	ND
2015-10-06	5810-052-0842	44.0 ppb
2015-10-06	5810-056-0730	ND
2015-11-03	5810-056-0908	ND
2015-12-01	5810-056-0732	ND
2016-01-11	5810-052-0921	45.0 ppb
2016-01-11	5810-056-0809	ND
2016-01-26	5810-019-1005	ND
2016-02-02	5810-056-0749	ND
2016-03-01	5810-056-0730	ND
2016-04-06	5810-052-0700	43.0 ppb
2016-04-06	5810-056-0954	23.0 ppb
2016-05-03	5810-056-0645	ND
2016-06-07	5810-056-0647	ND
2016-07-13	5810-030-0844	ND
2016-07-20	5810-052-0843	42.0 ppb
2016-07-27	5810-004-0750	ND
2016-07-27	5810-006-0817	ND
2016-07-27	5810-015-0943	ND
2016-07-27	5810-016-0846	ND
2016-07-27	5810-018-0803	ND
2016-07-27	5810-019-0922	ND
2016-07-27	5810-020-0836	ND
2016-07-27	5810-023-0855	ND
2016-07-27	5810-024-0955	ND
2016-07-27	5810-025-1009	ND
2016-08-17	5810-056-0706	ND
2016-09-06	5810-056-0648	ND
2016-10-26	5810-056-0926	ND
2016-11-10	5810-056-0620	ND
2016-12-15	5810-056-0618	ND
2017-03-20	5810-057-1120	43.0 ppb
2017-05-03	5810-052-0728	54.0 ppb
2017-06-14	5810-057-0820	ND
2017-07-27	5810-056-0641	ND
2017-08-01	5810-057-1115	ND
2017-08-02	5810-006-0859	ND
2017-08-02	5810-018-0843	ND
2017-08-02	5810-019-0823	ND
2017-08-02	5810-020-0805	ND
2017-08-02	5810-025-0925	ND
2017-08-02	5810-052-1115	38.0 ppb
2017-08-02	5810-056-0603	ND
2017-08-03	5810-030-0625	ND
2017-09-06	5810-056-1020	ND
2017-09-20	5810-057-0910	ND
2017-09-28	5810-057-0724	ND
2017-10-13	5810-057-1204	ND
2017-10-20	5810-056-0950	ND
2017-11-14	5810-052-0937	42.0 ppb
2017-11-14	5810-056-1021	ND
2017-11-14	5810-057-1138	ND
2017-12-12	5810-056-0920	ND
2017-12-12	5810-057-0735	ND
2018-01-10	5810-056-0753	ND
2018-01-17	5810-056-0747	ND
2018-02-14	5810-057-0925	ND
2018-02-21	5810-028-0858	33.0 ppb
2018-02-21	5810-052-0651	39.0 ppb
2018-02-21	5810-056-0752	ND
2018-03-14	5810-056-0820	190.0 ppb
2018-03-30	5810-057-0717	ND
2018-04-18	5810-028-0855	26.0 ppb
2018-04-25	A8D0837-01	1.30 ppb
2018-05-09	5810-052-0812	33.0 ppb
2018-05-09	5810-056-0707	ND
2018-05-09	5810-057-0757	ND
2018-06-04	5810-056-1002	ND
2018-06-04	5810-057-0950	ND
2018-06-13	5810-028-1132	26.0 ppb
2018-07-25	5810-028-1006	28.0 ppb
2018-08-15	5810-018-0819	ND
2018-08-15	5810-019-0902	ND
2018-08-15	5810-020-1001	ND
2018-08-15	5810-025-0755	ND
2018-08-15	5810-028-0720	29.0 ppb
2018-08-15	5810-030-0640	ND
2018-08-15	5810-052-0930	31.0 ppb
2018-08-15	5810-056-1053	ND
2018-08-15	5810-057-0840	ND
2018-09-12	A8H1575-01	0.510 ppb
2018-09-12	A8H1575-02	0.650 ppb
2018-09-12	A8H1575-04	ND
2018-09-12	A8H1575-05	43.0 ppb
2018-09-12	A8H1575-06	20.0 ppb
2018-09-12	A8H1578-01	ND
2018-09-12	A8H1575-07	0.540 ppb
2018-09-19	5810-028-1128	33.0 ppb
2018-09-26	A8I1124-01	1.30 ppb
2018-10-16	5810-028-1038	27.0 ppb
2018-11-07	5810-028-0818	29.0 ppb
2018-11-07	5810-052-0735	24.0 ppb
2018-11-07	5810-056-0903	ND
2018-11-07	5810-057-0926	35.0 ppb
2018-12-12	A8K0303-01	0.740 ppb
2019-02-06	5810-028-0820	24.0 ppb
2019-02-06	5810-052-0859	23.0 ppb
2019-02-06	5810-056-0925	ND
2019-02-06	5810-057-0934	ND
2019-05-08	5810-028-0750	32.0 ppb
2019-05-08	5810-052-1130	24.0 ppb
2019-05-08	5810-056-1211	ND
2019-05-08	5810-057-1110	ND
2019-08-07	9590-025-1102	ND
2019-08-07	9590-028-1033	33.0 ppb
2019-08-07	9590-030-1008	ND
2019-08-07	9590-052-1134	24.0 ppb
2019-08-07	9590-057-1200	ND
2019-08-08	9590-018-1010	ND
2019-08-08	9590-019-1033	ND
2019-08-08	9590-020-1103	ND
2019-08-08	9590-056-1128	ND
2019-11-05	9590-028-0914	29.0 ppb
2019-11-05	9590-052-1003	ND
2019-11-05	9590-056-1126	ND
2019-11-05	9590-057-1200	ND