Manganese

Carson City Public Works

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	6.20 ppb	20	7	ND - 51.0 ppb
2015	37.5 ppb	8	4	ND - 200.0 ppb
2016	4.08 ppb	4	2	ND - 14.0 ppb
2017	23.7 ppb	24	13	ND - 150.0 ppb
2018	51.1 ppb	10	6	ND - 120.0 ppb
2019	38.1 ppb	27	20	ND - 140.0 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
2014-05-27	201405280593-I	4.20 ppb
2014-06-19	201406200195	10.00 ppb
2014-06-19	201406200194	ND
2014-06-19	201406200121	51.0 ppb
2014-06-19	201406200196	ND
2014-06-19	201406200120	13.0 ppb
2014-06-19	201406200119	ND
2014-06-24	201406250084	ND
2014-06-24	201406250083	ND
2014-06-24	201406250086	ND
2014-06-24	201406250087	16.0 ppb
2014-06-24	201406250088	ND
2014-06-24	201406250085	ND
2014-06-25	201406260269	ND
2014-06-25	201406260270	ND
2014-06-25	201406260268	ND
2014-06-25	201406260267	2.70 ppb
2014-07-08	201407090717	ND
2014-07-30	201407310263	ND
2014-09-04	201409050261	27.0 ppb
2015-06-29	201506300124-IOC	43.0 ppb
2015-06-29	201506300177-IOC	200.0 ppb
2015-06-30	201507010220-IOC	43.0 ppb
2015-07-14	201507150299	ND
2015-07-15	201507160598	ND
2015-07-15	201507160441	ND
2015-08-04	201508050327	ND
2015-08-10	201508110263	14.0 ppb
2016-06-22	201606230265	ND
2016-06-22	201606230270	14.0 ppb
2016-08-10	201608110350	ND
2016-08-10	201608110453	2.30 ppb
2017-05-15	201705160867	9.90 ppb
2017-05-15	201705160632	ND
2017-05-15	201705160571	9.10 ppb
2017-05-16	201705170491	24.0 ppb
2017-05-16	201705170304	52.0 ppb
2017-05-16	201705170782	3.50 ppb
2017-05-23	201705240962	ND
2017-05-25	201705260591	5.60 ppb
2017-06-20	201706210537	ND
2017-06-20	201706210725	ND
2017-07-05	201707060865	ND
2017-07-20	201707210328	27.0 ppb
2017-07-20	201707210331	ND
2017-07-25	201707260765	ND
2017-07-25	201707260654	3.10 ppb
2017-07-25	201707260764	ND
2017-07-26	201707260490	ND
2017-07-27	201707280313	52.0 ppb
2017-08-01	201708021436	150.0 ppb
2017-08-01	201708020922	ND
2017-08-01	201708020897	ND
2017-08-28	201708290217	3.40 ppb
2017-11-20	1711684-001	110.0 ppb
2017-12-13	1712435-001	120.0 ppb
2018-04-25	18041332-01	ND
2018-04-26	201804280203	110.0 ppb
2018-05-15	201805161020	ND
2018-05-15	201805160828	ND
2018-05-24	201805250730	ND
2018-05-30	201805310461	57.0 ppb
2018-05-30	1805894-001	110.0 ppb
2018-06-21	201806250083	110.0 ppb
2018-07-23	201807240376	4.20 ppb
2018-08-29	1808979-001	120.0 ppb
2019-02-26	201902280234	9.00 ppb
2019-02-27	201902280122	ND
2019-02-27	201902280136	1.70 ppb
2019-02-27	201902280107	9.10 ppb
2019-02-27	201902280131	27.0 ppb
2019-02-27	201902280094	3.40 ppb
2019-02-28	201903010176	7.00 ppb
2019-05-14	201905150247	3.80 ppb
2019-06-24	201906250202A	ND
2019-06-26	19060884-001	140.0 ppb
2019-07-24	19070940-002	140.0 ppb
2019-08-19	201908200279	1.90 ppb
2019-08-20	201908210182	25.0 ppb
2019-08-20	201908210139	ND
2019-08-20	201908210226	ND
2019-08-20	201908210335	1.80 ppb
2019-08-20	201908210230	2.60 ppb
2019-08-21	201908220455	ND
2019-08-22	201908230324	ND
2019-08-27	201908280709	130.0 ppb
2019-09-24	201909250291	5.40 ppb
2019-09-25	201909260166	ND
2019-09-26	19100094-001	120.0 ppb
2019-10-30	19101004-001	140.0 ppb
2019-11-20	19110618-001	130.0 ppb
2019-12-23	201912260250	130.0 ppb
2019-12-26	201912270126	1.60 ppb