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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Cal/Am Water Company - San Marino

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

 

72

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND100ND
2016ND190ND
2017ND10ND
2018N/A00N/A
20191.79 ppb269ND - 20.0 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
2014-01-299590-007-1000ND
2014-04-141225-020-1045ND
2014-04-141225-007-1110ND
2014-04-141225-011-0855ND
2014-04-141225-006-1050ND
2014-04-141225-023-0935ND
2014-04-141225-029-0950ND
2014-04-141225-032-1015ND
2014-04-141225-044-0925ND
2014-05-121225-014-1300ND
2014-05-191225-010-0850ND
2014-06-231225-017-1045ND
2015-05-121225-007-1200ND
2015-05-121225-017-1245ND
2015-05-181225-044-1110ND
2015-05-181225-032-1130ND
2015-05-181225-023-1110ND
2015-05-181225-011-1050ND
2015-05-201225-006-1255ND
2015-05-201225-029-1235ND
2015-05-271225-010-0830ND
2015-05-271225-020-0855ND
2016-06-061225-017-1130ND
2016-06-061225-010-1000ND
2016-06-061225-020-1040ND
2016-06-061225-044-1000ND
2016-06-061225-007-1210ND
2016-06-061225-006-1100ND
2016-06-061225-023-1135ND
2016-06-061225-032-1105ND
2016-06-061225-029-1045ND
2016-09-149590-044-0945ND
2016-09-149590-032-1225ND
2016-09-149590-029-0920ND
2016-09-149590-007-0835ND
2016-09-149590-010-0805ND
2016-09-149590-006-0930ND
2016-09-149590-011-1130ND
2016-09-149590-017-0900ND
2016-09-149590-020-1145ND
2016-09-149590-023-1200ND
2017-01-179590-020-1010ND
2019-05-0644190601ND
2019-05-06441901010.510 ppb
2019-05-06441909011.60 ppb
2019-05-0744190701ND
2019-05-08441905010.500 ppb
2019-05-08441904010.540 ppb
2019-05-0944190201ND
2019-06-189590-007-1155ND
2019-07-109590-029-1032ND
2019-07-109590-006-1009ND
2019-07-109590-007-1104ND
2019-07-109590-011-093920.0 ppb
2019-07-109590-023-0833ND
2019-07-109590-032-0823ND
2019-07-109590-020-0921ND
2019-07-109590-017-1041ND
2019-07-109590-044-1020ND
2019-07-179590-011-1050ND
2019-08-06460915013.00 ppb
2019-08-269590-010-1001ND
2019-11-04474154010.920 ppb
2019-11-0447415601ND
2019-11-0447415201ND
2019-11-054741570115.0 ppb
2019-11-0547415301ND
2019-11-06474158014.50 ppb
2020-02-03487534011.60 ppb
2020-02-204741640112.0 ppb
2020-08-10474155010.430 ppb
2020-08-1951319301ND