Manganese

Santa Monica

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	ND	12	0	ND
2015	ND	12	0	ND
2016	0.367 ppb	12	2	ND - 2.30 ppb
2017	0.450 ppb	12	2	ND - 3.10 ppb
2018	2.59 ppb	16	14	ND - 9.80 ppb
2019	2.86 ppb	16	16	0.710 ppb - 4.40 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
2014-01-13	2975-071-0610	ND
2014-02-10	2975-071-0630	ND
2014-03-10	2975-071-0913	ND
2014-04-14	2975-071-0616	ND
2014-05-12	2975-071-0809	ND
2014-06-09	2975-071-0848	ND
2014-07-14	2975-071-0808	ND
2014-08-11	2975-071-0606	ND
2014-09-22	2975-071-0636	ND
2014-10-13	2975-071-0648	ND
2014-11-10	2975-071-0615	ND
2014-12-08	2975-071-0639	ND
2015-01-12	2975-071-0655	ND
2015-02-09	2975-071-0643	ND
2015-03-23	2975-071-0930	ND
2015-04-13	2975-071-0636	ND
2015-05-11	2975-071-0626	ND
2015-06-08	2975-071-0604	ND
2015-07-13	2975-071-0613	ND
2015-08-10	2975-071-0621	ND
2015-09-14	2975-071-0911	ND
2015-10-12	2975-071-0835	ND
2015-11-09	2975-071-0605	ND
2015-12-14	2975-071-0816	ND
2016-01-11	2975-071-0857	ND
2016-02-08	2975-071-0618	ND
2016-03-14	2975-071-0926	ND
2016-04-11	2975-071-0608	ND
2016-05-09	2975-071-0619	2.30 ppb
2016-06-13	2975-071-0612	ND
2016-07-11	2975-071-0607	ND
2016-08-08	2975-071-0559	ND
2016-09-12	2975-071-0627	2.10 ppb
2016-10-10	2975-071-0610	ND
2016-11-14	2975-071-0559	ND
2016-12-12	2975-071-0624	ND
2017-01-09	2975-071-0642	ND
2017-02-13	2975-071-0658	ND
2017-03-13	2975-071-0726	ND
2017-04-10	2975-071-0652	ND
2017-05-08	2975-071-0622	ND
2017-06-12	2975-071-0710	ND
2017-07-10	2975-071-0617	ND
2017-08-14	2975-071-0634	2.30 ppb
2017-09-11	2975-071-0615	3.10 ppb
2017-10-09	2975-071-0614	ND
2017-11-13	9590-071-0611	ND
2017-12-11	9590-071-0628	ND
2018-01-10	2975-071-0608	ND
2018-02-12	2975-071-0615	2.10 ppb
2018-03-12	2975-071-0618	2.20 ppb
2018-04-09	2975-071-0631	2.30 ppb
2018-05-14	2975-071-0654	3.70 ppb
2018-06-11	2975-071-0621	2.40 ppb
2018-07-09	2975-071-0628	4.00 ppb
2018-08-13	2975-071-0619	2.80 ppb
2018-09-04	201809050744	9.80 ppb
2018-09-04	201809050743	1.90 ppb
2018-09-04	201809050742	2.30 ppb
2018-09-10	2975-071-0617	2.70 ppb
2018-10-08	2975-071-0643	ND
2018-11-12	2975-071-0610	2.10 ppb
2018-12-03	201812040311	1.000 ppb
2018-12-10	2975-071-0618	2.20 ppb
2019-01-14	2975-071-0612	3.70 ppb
2019-02-11	2975-071-0639	3.40 ppb
2019-03-04	201903050287	4.40 ppb
2019-03-04	201903050286	2.60 ppb
2019-03-05	201903050308	1.30 ppb
2019-03-11	2975-071-0616	3.30 ppb
2019-04-08	2975-071-0610	3.70 ppb
2019-05-13	2975-071-0606	2.90 ppb
2019-06-03	201906040435	0.710 ppb
2019-06-10	2975-071-0610	2.90 ppb
2019-07-08	2975-071-0608	2.90 ppb
2019-08-12	2975-071-0613	2.40 ppb
2019-09-09	2975-071-0623	2.40 ppb
2019-10-14	2975-071-0610	3.30 ppb
2019-11-11	2975-071-0610	2.70 ppb
2019-12-09	2975-071-0705	3.20 ppb