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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Golden State Water Company - Los Osos

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

 

177

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND400ND
2015ND420ND
2016ND250ND
2017ND230ND
2018ND270ND
2019ND200ND

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
2014-01-022706-001-0730ND
2014-01-022706-015-0730ND
2014-02-052706-001-0755ND
2014-04-152706-001-0850ND
2014-04-152706-015-0850ND
2014-04-302706-001-0830ND
2014-04-302706-015-0830ND
2014-07-022706-008-0850ND
2014-08-132706-001-0720ND
2014-08-132706-015-0725ND
2014-09-152706-001-1327ND
2014-09-152706-015-1330ND
2014-09-232706-001-1600ND
2014-09-232706-015-1605ND
2014-09-302706-001-1205ND
2014-09-302706-015-1207ND
2014-10-062706-001-1306ND
2014-10-062706-015-1309ND
2014-10-142706-001-1612ND
2014-10-142706-015-1615ND
2014-10-202706-001-1118ND
2014-10-202706-015-1120ND
2014-10-282706-001-1504ND
2014-10-282706-015-1506ND
2014-11-052706-001-0905ND
2014-11-052706-015-0905ND
2014-11-122706-001-0725ND
2014-11-122706-015-0725ND
2014-11-182706-001-0815ND
2014-11-182706-015-0815ND
2014-12-022706-001-0930ND
2014-12-022706-015-0935ND
2014-12-102706-001-0800ND
2014-12-102706-015-0800ND
2014-12-162706-001-1605ND
2014-12-162706-015-1600ND
2014-12-232706-001-0840ND
2014-12-232706-015-0842ND
2014-12-292706-001-1355ND
2014-12-292706-015-1358ND
2015-01-062706-001-1020ND
2015-01-062706-015-1023ND
2015-01-142706-001-0815ND
2015-01-142706-001-0820ND
2015-01-142706-010-0720ND
2015-01-142706-015-0820ND
2015-01-272706-001-1015ND
2015-01-272706-015-1018ND
2015-02-092706-001-1120ND
2015-02-092706-015-1124ND
2015-02-172706-001-1114ND
2015-02-172706-015-1117ND
2015-02-252706-001-0745ND
2015-02-252706-015-0745ND
2015-03-042706-001-0840ND
2015-03-042706-015-0840ND
2015-03-112706-001-0900ND
2015-03-112706-015-0900ND
2015-03-182706-001-0810ND
2015-03-182706-015-0810ND
2015-03-252706-001-0745ND
2015-03-252706-015-0745ND
2015-04-012706-001-0755ND
2015-04-012706-015-0755ND
2015-05-062706-001-0830ND
2015-05-062706-015-0830ND
2015-06-032706-001-0820ND
2015-06-032706-015-0820ND
2015-06-172706-003-0845ND
2015-06-242706-003-0740ND
2015-07-012706-001-0815ND
2015-07-012706-015-0815ND
2015-08-052706-001-0815ND
2015-08-052706-015-0815ND
2015-09-022706-001-0925ND
2015-09-022706-015-0925ND
2015-10-072706-001-0830ND
2015-10-072706-015-0832ND
2015-11-032706-001-1155ND
2015-11-032706-015-1158ND
2015-12-012706-001-1005ND
2015-12-012706-015-1010ND
2016-01-052706-001-1028ND
2016-01-052706-015-1030ND
2016-02-022706-001-1320ND
2016-02-022706-015-1322ND
2016-03-022706-001-0935ND
2016-03-022706-015-0935ND
2016-04-052706-001-0900ND
2016-04-052706-015-0905ND
2016-05-042706-001-0910ND
2016-05-042706-015-0910ND
2016-05-112706-019-0718ND
2016-06-012706-001-0725ND
2016-06-012706-015-0725ND
2016-07-062706-001-0825ND
2016-07-062706-015-0825ND
2016-08-032706-001-0807ND
2016-08-032706-015-0807ND
2016-09-142706-001-0740ND
2016-09-142706-015-0740ND
2016-10-052706-001-0738ND
2016-10-052706-015-0740ND
2016-11-022706-001-0710ND
2016-11-022706-015-0710ND
2016-12-142706-001-0833ND
2016-12-142706-015-0833ND
2017-01-109590-001-0900ND
2017-01-109590-015-0900ND
2017-02-079590-001-0835ND
2017-02-079590-015-0835ND
2017-02-085867-019-1006ND
2017-03-079590-001-0800ND
2017-03-079590-015-0800ND
2017-04-049590-001-0843ND
2017-04-049590-015-0845ND
2017-05-029590-001-0715ND
2017-05-029590-015-0715ND
2017-07-119590-001-0735ND
2017-07-119590-015-0735ND
2017-08-019590-001-0940ND
2017-08-019590-015-0940ND
2017-09-059590-001-0750ND
2017-09-059590-015-0753ND
2017-10-039590-001-0810ND
2017-10-039590-015-0812ND
2017-11-079590-001-0828ND
2017-11-079590-015-0830ND
2017-12-129590-001-0800ND
2017-12-129590-015-0800ND
2018-01-029590-001-0820ND
2018-01-029590-015-0822ND
2018-01-309590-001-0900ND
2018-01-309590-010-0800ND
2018-02-069590-001-0745ND
2018-02-069590-015-0745ND
2018-02-139590-003-0925ND
2018-03-069590-001-0745ND
2018-03-069590-015-0745ND
2018-04-029590-001-0733ND
2018-04-029590-015-0735ND
2018-05-019590-001-0725ND
2018-05-019590-015-0730ND
2018-06-052438-001-0910ND
2018-06-052438-015-0910ND
2018-07-022438-001-1050ND
2018-07-022438-015-1052ND
2018-08-069590-001-0940ND
2018-08-069590-015-0942ND
2018-09-049590-001-0825ND
2018-09-049590-015-0827ND
2018-10-019590-001-0942ND
2018-10-019590-015-0944ND
2018-11-059590-001-1057ND
2018-11-059590-015-1100ND
2018-12-039590-001-0755ND
2018-12-039590-015-0758ND
2019-01-079590-001-0922ND
2019-01-079590-015-0924ND
2019-02-049590-001-0900ND
2019-02-049590-015-0902ND
2019-03-049590-001-0735ND
2019-03-049590-015-0737ND
2019-04-019590-001-0745ND
2019-04-019590-015-0747ND
2019-05-069590-001-1028ND
2019-05-069590-015-1030ND
2019-05-069590-019-0815ND
2019-06-039590-001-0850ND
2019-06-039590-015-0852ND
2019-07-089590-001-1000ND
2019-07-089590-015-1002ND
2019-08-059590-001-0845ND
2019-08-059590-015-0847ND
2019-09-039590-001-0745ND
2019-09-039590-015-0745ND
2019-12-169590-001-1010ND