Manganese

Long Beach 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

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	N/A	0	0	N/A
2016	12.7 ppb	33	12	ND - 61.0 ppb
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	5.92 ppb	28	7	ND - 46.0 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
2016-05-05	9590-040-0836	ND
2016-08-03	4206-001-0853	ND
2016-08-03	4206-030-1006	ND
2016-08-03	4206-033-1059	ND
2016-08-03	4206-035-1157	ND
2016-08-03	4206-038-1243	ND
2016-08-03	4206-012-0821	ND
2016-08-03	4206-043-0847	ND
2016-08-03	4206-002-0927	ND
2016-08-04	4206-041-1259	ND
2016-08-04	4206-042-1211	27.0 ppb
2016-08-04	4206-057-1209	30.0 ppb
2016-08-04	4206-058-1128	26.3 ppb
2016-08-04	4206-028-1130	20.2 ppb
2016-08-04	4206-027-1026	ND
2016-08-04	4206-059-1016	23.4 ppb
2016-08-04	4206-025-0923	ND
2016-08-04	4206-061-1053	34.1 ppb
2016-08-04	4206-063-0852	ND
2016-08-04	4206-013-0826	ND
2016-08-04	4206-062-0937	ND
2016-08-04	4206-014-0848	ND
2016-08-04	4206-020-1102	ND
2016-08-04	4206-023-0955	ND
2016-11-03	9590-020-1011	ND
2016-11-03	9590-028-1028	26.0 ppb
2016-11-03	9590-061-1121	42.0 ppb
2016-11-03	9590-057-1048	37.0 ppb
2016-11-03	9590-039-1029	39.0 ppb
2016-11-04	9590-003-0933	ND
2016-11-04	9590-026-1147	61.0 ppb
2016-11-11	9590-026-1119	54.0 ppb
2016-11-11	9590-040-0913	ND
2019-07-18	9590-041-1011	ND
2019-08-06	9590-014-0816	ND
2019-09-11	9590-035-1114	ND
2019-09-11	9590-033-1221	ND
2019-09-11	9590-030-1246	ND
2019-09-11	9590-039-1041	ND
2019-09-11	9590-040-1156	ND
2019-09-12	9590-001-0843	ND
2019-09-12	9590-063-1049	ND
2019-09-12	9590-062-1129	ND
2019-09-12	9590-058-1320	46.0 ppb
2019-09-12	9590-059-1353	42.0 ppb
2019-09-12	9590-042-1231	ND
2019-09-12	9590-002-0906	ND
2019-09-12	9590-003-0930	ND
2019-09-12	9590-012-0841	ND
2019-09-12	9590-013-1008	ND
2019-09-12	9590-020-1206	ND
2019-09-12	9590-023-1109	ND
2019-09-12	9590-025-1000	ND
2019-09-12	9590-026-1031	ND
2019-09-12	9590-027-1137	ND
2019-09-12	9590-028-1228	26.0 ppb
2019-09-12	9590-043-0917	ND
2019-09-20	201909200504	1.30 ppb
2019-09-20	201909200505	2.00 ppb
2019-09-20	201909200506	2.50 ppb
2019-12-11	9590-061-1208	46.0 ppb
2020-03-18	202003180825	0.950 ppb
2020-03-18	202003180826	ND
2020-05-14	202005140611	0.860 ppb
2020-06-18	202006180290	2.60 ppb
2020-06-18	202006180291	0.490 ppb