Manganese

Golden State Water Company (GSWC) - South Arcadia

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
2013	N/A	0	0	N/A
2014	N/A	0	0	N/A
2015	ND	6	0	ND
2016	ND	1	0	ND
2017	N/A	0	0	N/A
2018	1.16 ppb	11	3	ND - 9.40 ppb
2019	0.205 ppb	6	2	ND - 0.740 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
2015-08-17	2706-002-1043	ND
2015-08-17	2706-003-1048	ND
2015-08-17	2706-015-0835	ND
2015-08-17	2706-005-0924	ND
2015-08-17	2706-006-0915	ND
2015-08-17	2706-014-0955	ND
2016-06-20	2706-004-1038	ND
2018-08-22	9590-002-1100	ND
2018-08-22	9590-015-1247	ND
2018-08-22	9590-014-1347	ND
2018-08-22	9590-006-1153	ND
2018-08-22	9590-005-1202	ND
2018-08-22	9590-003-1053	ND
2018-12-10	8L10131-01	2.10 ppb
2018-12-10	8L10131-02	9.40 ppb
2018-12-10	8L10131-03	ND
2018-12-10	8L10131-04	ND
2018-12-10	8L10131-05	1.30 ppb
2019-06-17	9F11001-01	ND
2019-06-17	9F11001-02	ND
2019-06-17	9F11001-03	0.740 ppb
2019-06-17	9F11001-04	ND
2019-06-17	9F11001-05	0.490 ppb
2019-06-24	9590-004-1320	ND