Manganese

City of Torrance Water Department

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

193

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	25.8 ppb	38	33	ND - 58.0 ppb
2015	10.6 ppb	45	16	ND - 53.0 ppb
2016	32.7 ppb	14	14	20.0 ppb - 56.0 ppb
2017	37.8 ppb	4	3	ND - 53.0 ppb
2018	22.9 ppb	38	31	ND - 53.0 ppb
2019	11.9 ppb	54	24	ND - 51.0 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
2014-01-29	3761-011-0850	22.0 ppb
2014-02-05	3761-011-0850	21.0 ppb
2014-02-05	9588-016-0950	58.0 ppb
2014-02-13	3761-011-0845	21.0 ppb
2014-02-19	3761-011-0920	25.0 ppb
2014-02-26	3761-011-0725	ND
2014-03-05	3761-011-0855	21.0 ppb
2014-03-12	3761-011-0905	23.0 ppb
2014-03-19	3761-011-0905	21.0 ppb
2014-03-26	3761-011-0920	ND
2014-04-02	3761-011-0925	ND
2014-04-09	3761-011-1030	24.0 ppb
2014-04-15	3761-011-0935	ND
2014-04-22	9588-016-1025	57.0 ppb
2014-05-01	3761-011-0855	25.0 ppb
2014-05-07	3761-011-0850	25.0 ppb
2014-05-14	3761-011-1020	29.0 ppb
2014-05-23	3761-011-0810	ND
2014-05-28	3761-011-0850	31.0 ppb
2014-06-04	3761-011-1300	31.0 ppb
2014-06-11	3761-011-0910	31.0 ppb
2014-06-18	3761-011-0850	34.0 ppb
2014-06-25	3761-011-0950	29.0 ppb
2014-07-02	3761-011-0915	29.0 ppb
2014-07-09	3761-011-0925	34.0 ppb
2014-07-16	3761-011-0750	30.0 ppb
2014-07-23	3761-011-0945	29.0 ppb
2014-07-30	3761-011-0910	24.0 ppb
2014-07-30	9588-016-1035	54.0 ppb
2014-08-06	3761-011-0840	24.0 ppb
2014-08-13	3761-011-0855	24.0 ppb
2014-08-20	3761-011-0920	24.0 ppb
2014-08-27	3761-011-1400	27.0 ppb
2014-09-03	3761-011-0910	23.0 ppb
2014-09-10	3761-011-0905	27.0 ppb
2014-09-17	3761-011-0835	23.0 ppb
2014-09-24	3761-011-0719	26.0 ppb
2014-11-25	9588-016-1000	53.0 ppb
2015-02-04	3761-011-0835	ND
2015-02-19	3761-011-0855	ND
2015-02-25	3761-011-0905	21.0 ppb
2015-03-11	3761-011-0920	ND
2015-03-19	3761-011-1350	ND
2015-03-26	3761-011-0750	ND
2015-03-31	9588-016-0922	51.0 ppb
2015-04-03	3761-011-0640	ND
2015-04-09	3761-011-0900	ND
2015-04-15	3761-011-0905	ND
2015-04-21	3761-011-0920	ND
2015-04-29	3761-011-0845	ND
2015-05-20	9588-016-0930	51.0 ppb
2015-05-27	3761-011-0750	ND
2015-06-02	3761-011-1030	ND
2015-06-10	3761-011-0825	ND
2015-06-17	3761-011-0935	ND
2015-06-24	3761-011-0820	ND
2015-07-01	3761-011-0900	ND
2015-07-08	3761-011-0840	ND
2015-07-15	3761-011-0805	ND
2015-07-22	3761-011-1040	ND
2015-07-29	3761-011-0845	ND
2015-07-29	9588-016-1004	52.0 ppb
2015-08-05	3761-011-0940	ND
2015-08-13	3761-011-0930	ND
2015-09-02	3761-011-0910	ND
2015-09-08	3761-011-1355	21.0 ppb
2015-09-18	3761-011-0740	ND
2015-09-23	3761-011-0920	ND
2015-09-30	3761-011-0905	21.0 ppb
2015-10-07	3761-011-0855	ND
2015-10-14	3761-011-0855	ND
2015-10-23	3761-011-0930	21.0 ppb
2015-10-28	3761-011-0835	22.0 ppb
2015-10-28	9588-016-0951	53.0 ppb
2015-11-03	3761-011-0845	23.0 ppb
2015-11-10	3761-011-0910	22.0 ppb
2015-11-18	3761-011-0815	22.0 ppb
2015-11-25	3761-011-0835	26.0 ppb
2015-12-02	3761-011-1030	ND
2015-12-09	3761-011-0850	ND
2015-12-16	3761-011-1000	21.0 ppb
2015-12-23	3761-011-0900	26.0 ppb
2015-12-30	3761-011-0835	26.0 ppb
2016-01-06	3761-011-0840	29.0 ppb
2016-01-13	3761-011-0905	26.0 ppb
2016-01-20	3761-011-0920	28.0 ppb
2016-01-27	3761-011-0935	26.0 ppb
2016-02-03	3761-011-0830	26.0 ppb
2016-02-10	3761-011-0850	28.0 ppb
2016-02-17	3761-011-0820	29.0 ppb
2016-02-23	9588-016-0932	52.0 ppb
2016-02-24	3761-011-0910	29.0 ppb
2016-03-02	3761-011-0910	31.0 ppb
2016-05-04	3761-011-0925	26.0 ppb
2016-05-11	3761-011-0845	20.0 ppb
2016-05-12	9588-016-0930	56.0 ppb
2016-09-27	9588-016-0910	52.0 ppb
2017-01-31	9588-016-0920	47.0 ppb
2017-04-19	9588-016-0915	51.0 ppb
2017-10-10	9588-016-0933	53.0 ppb
2017-12-14	3761-011-1104	ND
2018-01-30	9588-016-0930	53.0 ppb
2018-01-31	3761-011-0855	20.0 ppb
2018-02-21	3761-011-1025	26.0 ppb
2018-02-28	3761-011-0950	ND
2018-03-28	3761-011-1300	22.0 ppb
2018-04-04	3761-011-0925	24.0 ppb
2018-04-11	3761-011-0913	24.0 ppb
2018-04-19	9588-016-0950	49.0 ppb
2018-04-20	3761-011-0811	26.0 ppb
2018-05-24	3761-011-0925	20.0 ppb
2018-05-31	3761-011-0755	36.0 ppb
2018-06-07	3761-011-0933	35.0 ppb
2018-06-14	3761-011-0805	29.0 ppb
2018-06-29	3761-011-0840	25.0 ppb
2018-07-05	3761-011-0802	24.0 ppb
2018-07-13	3761-011-0830	34.0 ppb
2018-07-19	3761-011-0753	25.0 ppb
2018-07-26	3761-011-0746	25.0 ppb
2018-08-02	9588-016-1030	50.0 ppb
2018-08-15	3761-011-0935	23.0 ppb
2018-08-30	3761-011-0805	ND
2018-09-05	3761-011-0738	22.0 ppb
2018-09-12	3761-011-0818	22.0 ppb
2018-09-19	3761-011-0830	22.0 ppb
2018-09-26	3761-011-0748	21.0 ppb
2018-10-10	3761-011-0748	26.0 ppb
2018-10-17	3761-011-0925	ND
2018-10-24	3761-011-0745	20.0 ppb
2018-11-01	3761-011-0750	ND
2018-11-07	3761-011-0935	24.0 ppb
2018-11-08	9588-016-1005	52.0 ppb
2018-11-14	3761-011-0820	ND
2018-11-21	3761-011-0722	21.0 ppb
2018-11-28	3761-011-0748	24.0 ppb
2018-12-04	3761-011-0745	23.0 ppb
2018-12-13	3761-011-0752	ND
2018-12-20	3761-011-0741	ND
2018-12-27	3761-011-0720	22.0 ppb
2019-01-10	3761-011-0915	ND
2019-01-16	3761-011-0733	ND
2019-01-23	9588-016-1033	51.0 ppb
2019-01-24	3761-011-0726	ND
2019-01-30	3761-011-0850	ND
2019-02-06	9B04018-01	0.680 ppb
2019-02-06	9B04018-11	42.0 ppb
2019-02-07	3761-011-0806	ND
2019-02-13	3761-011-0748	ND
2019-02-21	3761-011-0749	ND
2019-02-27	3761-011-0840	ND
2019-03-05	3761-011-0752	ND
2019-03-13	3761-011-0725	ND
2019-03-20	3761-011-0724	ND
2019-03-27	3761-011-0915	21.0 ppb
2019-04-04	3761-011-0803	ND
2019-04-10	3761-011-0719	ND
2019-04-17	3761-011-0000	ND
2019-04-24	3761-011-0745	ND
2019-05-01	3761-011-0740	32.0 ppb
2019-05-01	9588-016-0957	51.0 ppb
2019-05-09	3761-011-0738	20.0 ppb
2019-05-15	3761-011-0729	21.0 ppb
2019-05-22	3761-011-0841	ND
2019-05-29	3761-011-0718	21.0 ppb
2019-06-05	3761-011-0842	30.0 ppb
2019-06-12	3761-011-0945	25.0 ppb
2019-06-19	3761-011-0737	27.0 ppb
2019-06-26	3761-011-0839	ND
2019-07-03	3761-011-0623	ND
2019-07-10	3761-011-0726	ND
2019-07-17	3761-011-0613	20.0 ppb
2019-07-24	3761-011-0728	22.0 ppb
2019-07-31	3761-011-0859	22.0 ppb
2019-08-07	3761-011-0815	ND
2019-08-14	3761-011-0918	23.0 ppb
2019-08-14	9588-016-1130	51.0 ppb
2019-08-21	3761-011-0550	22.0 ppb
2019-08-28	3761-011-0850	21.0 ppb
2019-09-06	3761-011-0846	21.0 ppb
2019-09-11	3761-011-0942	ND
2019-09-19	3761-011-0755	ND
2019-09-25	3761-011-0847	ND
2019-10-09	3761-011-0845	ND
2019-10-16	3761-011-0845	ND
2019-10-23	3761-011-0955	ND
2019-10-30	3761-011-0744	ND
2019-10-30	9588-016-1028	51.0 ppb
2019-11-13	9K11009-01	2.20 ppb
2019-11-20	3761-011-0850	ND
2019-11-27	3761-011-0919	24.0 ppb
2019-12-11	3761-011-0831	ND
2019-12-18	3761-011-0836	ND
2019-12-26	3761-011-0902	21.0 ppb