Manganese

California Water Service (CWS) - King City

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	0.206 ppb	4	3	ND - 0.464 ppb
2015	0.163 ppb	4	1	ND - 0.650 ppb
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	0.0840 ppb	10	2	ND - 0.420 ppb
2019	0.111 ppb	9	2	ND - 0.530 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
2014-06-04	9590-015-0930	ND
2014-07-17	5701-015-1000	0.169 ppb
2014-07-17	5701-014-1054	0.190 ppb
2014-07-17	5701-008-1150	0.464 ppb
2015-02-18	9590-014-1235	ND
2015-06-09	9590-008-1110	ND
2015-06-09	5701-008-1118	0.650 ppb
2015-09-10	9590-007-1233	ND
2016-03-07	9590-012-1150	ND
2016-03-08	9590-006-1008	ND
2017-06-08	9590-015-1216	ND
2017-11-20	9590-015-1130	ND
2018-02-08	9590-014-1125	ND
2018-07-17	9590-008-1113	ND
2018-08-15	5701-007-1115	ND
2018-09-17	9590-007-1300	ND
2018-10-02	A8I2048-04	0.420 ppb
2018-10-02	A8I2046-04	ND
2018-10-10	A8I2058-04	ND
2018-10-10	A8I2055-04	ND
2018-10-30	A8I2053-04	0.420 ppb
2018-10-31	A8I1587-04	ND
2019-01-15	5810-013-1151	ND
2019-01-15	5810-009-1040	ND
2019-03-20	9590-012-1145	ND
2019-04-02	A9C0884-04	0.530 ppb
2019-04-02	A9C0887-04	0.470 ppb
2019-04-09	A9C1789-04	ND
2019-04-16	A9C1790-04	ND
2019-04-16	A9C1792-04	ND
2019-04-17	9590-006-1201	ND