Manganese

Truckee Meadows Water Authority

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

203

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	6.79 ppb	14	3	ND - 48.0 ppb
2015	ND	9	0	ND
2016	2.73 ppb	19	1	ND - 51.9 ppb
2017	5.33 ppb	25	3	ND - 78.7 ppb
2018	1.54 ppb	43	15	ND - 11.7 ppb
2019	1.68 ppb	51	20	ND - 15.0 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
2014-04-22	0414-13-I	ND
2014-04-22	0414-12-IS	ND
2014-04-22	0414-16-IS	42.0 ppb
2014-04-23	0414-17-IS	ND
2014-06-09	0614-06-IS	ND
2014-06-09	0614-07-I	ND
2014-06-17	0614-11-IS	ND
2014-06-17	0614-10-I	5.10 ppb
2014-06-17	0614-09-I	ND
2014-06-17	0614-12-IS	ND
2014-06-17	0614-13-IS	ND
2014-06-17	0614-14-IS	ND
2014-06-24	0614-28-IS	48.0 ppb
2014-06-24	0614-26-IS	ND
2015-06-08	1506017-01	ND
2015-06-08	1506018-01	ND
2015-06-11	1506027-01	ND
2015-06-17	1506035-01	ND
2015-06-17	1506036-01	ND
2015-06-17	1506037-01	ND
2015-06-17	1506038-01	ND
2015-06-23	1506055-01	ND
2015-06-23	1506061-01	ND
2016-05-31	1605028-01	ND
2016-05-31	1605025-01	ND
2016-05-31	1605026-01	ND
2016-05-31	1605027-01	ND
2016-06-01	1606001-01	ND
2016-06-06	1606010-01	ND
2016-07-19	1607023-01	51.9 ppb
2016-07-19	1607024-01	ND
2016-07-19	1607025-01	ND
2016-08-04	1608010-01	ND
2016-08-04	1608011-01	ND
2016-08-15	1608022-01	ND
2016-08-15	1608023-01	ND
2016-08-24	1608035-01	ND
2016-08-24	1608034-01	ND
2016-08-24	1608033-01	ND
2016-08-24	1608037-01	ND
2016-08-25	1608036-01	ND
2016-08-25	1608039-01	ND
2017-02-07	1702004-01	78.7 ppb
2017-03-08	1703009-01	ND
2017-03-08	1703008-01	ND
2017-05-02	1705003-01	ND
2017-05-02	1705004-01	ND
2017-05-02	1705005-01	ND
2017-05-15	1705023-01	26.0 ppb
2017-05-15	1705025-01	ND
2017-05-15	1705024-01	ND
2017-05-25	1705041-01	ND
2017-07-11	1707003-01	28.5 ppb
2017-07-11	1707002-01	ND
2017-07-11	1707005-01	ND
2017-07-11	1707004-01	ND
2017-07-18	1707020-01	ND
2017-07-18	1707021-01	ND
2017-07-18	1707022-01	ND
2017-07-18	1707024-01	ND
2017-08-16	1708013-01	ND
2017-08-16	1708014-01	ND
2017-08-29	1708026-01	ND
2017-08-29	1708027-01	ND
2017-08-29	1708029-01	ND
2017-08-29	1708030-01	ND
2017-08-29	1708025-01	ND
2018-01-23	1801009-01	ND
2018-02-01	1802001-01WET	ND
2018-02-06	1802006-01	ND
2018-03-01	1802003-02	ND
2018-04-04	1804005-01	ND
2018-04-09	1804011-01	ND
2018-04-09	1804012-01	ND
2018-04-11	1804017-01	ND
2018-04-11	1804018-01	ND
2018-04-11	1804019-01	ND
2018-04-24	1804027-01	6.50 ppb
2018-04-25	1804025-01	ND
2018-04-26	1804044-01	ND
2018-05-02	201805040249	1.90 ppb
2018-05-02	201805040251	ND
2018-05-15	201805170784	1.02 ppb
2018-05-15	201805170739	1.80 ppb
2018-05-15	201805170738	2.68 ppb
2018-05-21	1805043-01	ND
2018-05-23	1805041-01	ND
2018-07-02	8G03058-01	ND
2018-07-02	8G03025-01	ND
2018-07-24	1807025-01	ND
2018-10-02	8J04025-01	ND
2018-10-02	8J04025-03	ND
2018-10-02	8J04025-05	ND
2018-10-02	8J04025-07	ND
2018-10-09	8J11027-03	ND
2018-10-09	8J11027-01	1.40 ppb
2018-10-09	8J11042-01	1.30 ppb
2018-10-09	8J11042-03	7.10 ppb
2018-10-09	8J11040-01	8.80 ppb
2018-10-09	8J11040-03	ND
2018-10-10	8J11041-01	4.40 ppb
2018-10-15	8J17032-01	5.40 ppb
2018-11-14	1811008-02	ND
2018-11-14	1811009-02	ND
2018-11-14	1811010-02	ND
2018-11-14	1811011-02	11.7 ppb
2018-11-14	1811012-02	ND
2018-11-27	8K29207-01	5.20 ppb
2018-11-27	8K29207-02	1.90 ppb
2018-11-29	8K30047-01	5.00 ppb
2019-01-07	9A09073-01	ND
2019-01-08	9A10017-01	1.40 ppb
2019-01-08	9A10020-02	3.30 ppb
2019-01-08	9A10020-01	5.80 ppb
2019-01-08	9A10019-01	2.40 ppb
2019-01-09	1901012-02	ND
2019-01-09	1901013-02	ND
2019-01-14	9A16012-02	1.70 ppb
2019-01-14	9A16012-01	0.620 ppb
2019-01-16	1901011-02	ND
2019-01-16	1901017-02	ND
2019-01-17	9A18050-02	ND
2019-01-22	1901010-02	ND
2019-01-24	9A25042-01	3.20 ppb
2019-01-29	9A31017-01	1.70 ppb
2019-02-04	9B06009-01	2.70 ppb
2019-02-04	9B06033-01	11.0 ppb
2019-02-04	9B06007-01	1.40 ppb
2019-02-04	9B06007-02	15.0 ppb
2019-02-05	1902001-01	ND
2019-02-06	9B11034-02	6.60 ppb
2019-02-06	9B11034-01	15.0 ppb
2019-02-26	1902019-01	ND
2019-05-07	1905007-01	ND
2019-05-07	1905008-01	6.32 ppb
2019-05-22	9E24039-01	0.830 ppb
2019-05-22	9E24038-01	ND
2019-05-29	1905027-01	ND
2019-06-19	1906012-01	ND
2019-06-19	1906013-01	ND
2019-06-19	1906014-01	ND
2019-06-19	1906015-01	ND
2019-06-19	1906016-01	ND
2019-07-01	9G03073-01	2.60 ppb
2019-07-01	9G03074-01	ND
2019-07-01	9G03069-01	ND
2019-07-01	9G03070-01	2.30 ppb
2019-07-01	9G03072-01	ND
2019-07-01	9G03075-01	ND
2019-07-01	9G03071-01	ND
2019-07-09	1907014-02	ND
2019-07-09	1907018-01	ND
2019-07-25	1907045-01	ND
2019-07-29	1907046-01	ND
2019-07-30	1907048-01	ND
2019-08-06	1908002-01	ND
2019-08-06	1908004-01	ND
2019-08-06	1908007-01	ND
2019-08-07	9H09030-01	ND
2019-08-07	9H09029-01	0.410 ppb
2019-08-07	9H09029-02	1.60 ppb
2020-01-02	0A03031-01	1.10 ppb
2020-01-02	0A03035-01	0.700 ppb
2020-01-02	0A03032-01	2.10 ppb
2020-01-02	0A03034-01	2.20 ppb
2020-01-02	0A03027-01	ND
2020-01-02	0A03029-01	2.90 ppb
2020-01-02	0A03028-01	1.40 ppb
2020-01-02	0A03030-01	0.520 ppb
2020-01-29	0A31022-01	ND
2020-02-11	0B13020-01	6.50 ppb
2020-02-11	0B13025-01	14.0 ppb
2020-02-11	0B13022-01	1.70 ppb
2020-02-11	0B13019-01	5.80 ppb
2020-02-11	0B13016-01	8.30 ppb
2020-02-11	0B13023-01	5.40 ppb
2020-02-11	0B13018-01	1.50 ppb
2020-04-21	0D23043-01	3.00 ppb
2020-04-22	0D23042-01	0.780 ppb
2020-04-22	0D23048-01	0.750 ppb
2020-07-07	0G09034-01	ND
2020-07-07	0G09034-02	ND
2020-07-07	0G09037-01	ND
2020-07-07	0G09035-01	ND
2020-07-07	0G09037-02	ND
2020-07-07	0G09035-02	ND
2020-07-07	0G09021-01	ND
2020-07-07	0G09036-01	ND
2020-07-07	0G09021-02	ND
2020-08-04	0H06039-01	0.830 ppb
2020-08-04	0H06056-02	ND
2020-08-04	0H06055-01	ND
2020-08-04	0H06055-02	0.740 ppb
2020-08-04	0H06040-01	ND
2020-08-04	0H06040-02	ND
2020-08-06	0H06056-01	ND
2020-08-25	0H27051-01	21.0 ppb
2020-08-25	0H27038-01	ND
2020-10-05	0J07037-01	19.0 ppb
2020-10-05	0J07034-01	ND
2020-10-05	0J07040-01	0.990 ppb
2020-10-05	0J07041-01	1.000 ppb
2020-10-05	0J07039-01	0.920 ppb