Manganese

City of Stockton

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

145

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	12.9 ppb	17	2	ND - 190.0 ppb
2015	1.33 ppb	21	1	ND - 28.0 ppb
2016	3.00 ppb	20	3	ND - 20.0 ppb
2017	9.38 ppb	16	4	ND - 70.0 ppb
2018	9.45 ppb	20	4	ND - 100.0 ppb
2019	8.33 ppb	51	30	ND - 77.0 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
2014-01-07	5810-104-0820	ND
2014-02-04	5810-104-1045	ND
2014-03-04	5810-104-1115	29.0 ppb
2014-04-01	5810-104-1110	ND
2014-05-06	5810-104-1033	ND
2014-06-04	5810-104-1045	ND
2014-06-11	5810-104-0950	ND
2014-07-01	5810-104-1130	ND
2014-08-06	5810-104-1100	ND
2014-08-11	5810-083-0900	190.0 ppb
2014-08-12	5810-094-0925	ND
2014-08-12	5810-096-0950	ND
2014-09-02	5810-104-1030	ND
2014-10-01	5810-104-0925	ND
2014-11-05	5810-104-1000	ND
2014-11-18	5810-083-1030	ND
2014-12-03	5810-104-1000	ND
2015-01-07	5810-104-1215	ND
2015-02-04	5810-104-1130	ND
2015-02-17	5810-083-1015	ND
2015-03-04	5810-104-1100	ND
2015-04-01	5810-104-1030	ND
2015-05-06	5810-104-1110	ND
2015-05-26	5810-083-0800	ND
2015-06-03	5810-104-1030	ND
2015-06-10	5810-104-1000	ND
2015-07-08	5810-104-1125	ND
2015-08-05	5810-104-1010	ND
2015-08-12	5810-038-0850	ND
2015-08-12	5810-040-0915	ND
2015-08-13	5810-037-1100	ND
2015-08-13	5810-039-1015	ND
2015-08-13	5810-087-1130	28.0 ppb
2015-08-19	5810-084-0910	ND
2015-09-02	5810-104-1010	ND
2015-10-07	5810-104-1020	ND
2015-11-04	5810-104-1005	ND
2015-12-17	5810-104-1026	ND
2016-01-06	5810-104-1015	ND
2016-02-10	5810-104-1005	20.0 ppb
2016-03-09	5810-104-1030	ND
2016-04-06	5810-104-1005	ND
2016-05-12	5867-104-1145	ND
2016-06-08	5867-104-1025	ND
2016-06-21	5867-104-1116	ND
2016-07-13	5867-104-1007	ND
2016-08-03	5867-104-1007	ND
2016-08-18	5867-046-0830	ND
2016-08-18	5867-092-1020	ND
2016-08-18	5867-098-0900	ND
2016-08-18	5867-100-0940	ND
2016-08-25	5867-003-0927	20.0 ppb
2016-08-25	5867-055-1101	ND
2016-08-25	5867-089-1030	20.0 ppb
2016-09-07	5867-104-1008	ND
2016-10-05	5867-104-1005	ND
2016-11-02	5867-104-1005	ND
2016-12-07	5867-104-1025	ND
2017-01-11	5867-104-1005	20.0 ppb
2017-02-01	5867-104-1033	20.0 ppb
2017-03-08	5867-104-1005	ND
2017-04-05	5867-104-1005	ND
2017-05-10	5867-104-1012	ND
2017-06-07	5867-104-1016	ND
2017-06-22	5867-104-1002	ND
2017-07-12	5867-104-1005	ND
2017-08-02	5867-104-1015	ND
2017-08-08	5867-083-0900	70.0 ppb
2017-08-08	5867-094-0810	ND
2017-09-06	5867-104-1015	ND
2017-10-04	5867-104-1005	ND
2017-11-01	5867-104-1005	ND
2017-11-14	5867-083-0840	40.0 ppb
2017-12-06	5867-104-1036	ND
2018-01-10	5867-104-1115	ND
2018-02-07	5867-104-1020	ND
2018-02-14	5867-083-0915	100.0 ppb
2018-03-07	5867-104-1001	ND
2018-04-04	5867-104-1020	ND
2018-05-09	9590-104-1017	ND
2018-05-15	9590-003-1035	35.0 ppb
2018-06-06	9590-104-1146	ND
2018-06-27	9590-104-1200	ND
2018-07-11	9590-104-1200	ND
2018-08-01	9590-104-1240	ND
2018-08-14	9590-038-1110	ND
2018-08-22	9590-055-1110	ND
2018-08-22	9590-084-1150	ND
2018-08-29	9590-037-1110	27.0 ppb
2018-08-29	9590-087-1140	27.0 ppb
2018-09-05	9590-104-1205	ND
2018-10-10	9590-104-1233	ND
2018-11-07	9590-104-1011	ND
2018-12-05	9590-104-1020	ND
2019-01-09	1610-104-1005	ND
2019-02-07	1610-104-1030	ND
2019-02-20	A9A2427-06	2.20 ppb
2019-02-20	A9A2427-05	3.00 ppb
2019-02-20	A9A2427-04	4.50 ppb
2019-02-20	A9A2427-03	20.0 ppb
2019-02-20	A9A2427-10	ND
2019-02-20	A9A2427-09	4.40 ppb
2019-02-20	A9A2427-15	3.80 ppb
2019-02-20	A9A2427-08	54.0 ppb
2019-02-20	A9A2427-01	10.00 ppb
2019-02-20	A9A2427-02	ND
2019-02-20	A9A2427-07	7.20 ppb
2019-02-21	A9A2427-18	3.50 ppb
2019-02-21	A9A2427-16	3.90 ppb
2019-02-21	A9A2427-17	15.0 ppb
2019-02-21	A9A2427-13	24.0 ppb
2019-03-06	1610-104-1005	ND
2019-04-03	1610-104-1010	ND
2019-05-07	A9D1356-02	7.20 ppb
2019-05-07	A9D1356-01	4.50 ppb
2019-05-08	1610-104-1010	ND
2019-05-21	1610-083-1005	ND
2019-06-05	1610-104-0900	ND
2019-06-11	1610-104-1005	ND
2019-08-06	1610-046-0840	ND
2019-08-06	1610-092-0910	ND
2019-08-06	1610-096-1000	ND
2019-08-06	1610-098-0800	23.0 ppb
2019-08-07	1610-104-1005	ND
2019-08-13	1610-083-1105	ND
2019-08-21	A9G0737-17	1.60 ppb
2019-08-21	A9G0737-06	2.00 ppb
2019-08-21	A9G0737-05	3.00 ppb
2019-08-21	A9G0737-04	2.40 ppb
2019-08-21	A9G0737-03	20.0 ppb
2019-08-21	A9G0737-11	1.80 ppb
2019-08-21	A9G0737-10	ND
2019-08-21	A9G0737-09	ND
2019-08-21	A9G0737-08	49.0 ppb
2019-08-21	A9G0737-01	11.0 ppb
2019-08-21	A9G0737-07	2.00 ppb
2019-08-22	A9G0737-18	2.20 ppb
2019-08-22	A9G0737-16	2.60 ppb
2019-08-22	A9G0737-15	7.90 ppb
2019-08-22	A9G0737-13	77.0 ppb
2019-09-04	1610-104-1005	ND
2019-10-02	1610-104-1005	ND
2019-11-06	1610-104-1025	ND
2019-11-19	1610-083-0845	52.0 ppb
2019-12-03	1610-104-1321	ND