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EWG's Tap Water Database — 2021 UPDATE

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Manganese

California American Water Company - Lincoln Oaks

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

 

104

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
20158.42 ppb244ND - 63.0 ppb
201631.3 ppb4422.0 ppb - 42.0 ppb
201738.7 ppb32ND - 69.0 ppb
20187.23 ppb264ND - 59.0 ppb
201923.8 ppb2420ND - 290.0 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
2015-08-101225-004-0915ND
2015-08-101225-005-1100ND
2015-08-101225-019-1220ND
2015-08-101225-026-0940ND
2015-08-111225-009-1055ND
2015-08-111225-014-0855ND
2015-08-111225-025-0820ND
2015-08-111225-028-1025ND
2015-08-131225-001-1055ND
2015-08-131225-006-1045ND
2015-08-131225-015-0840ND
2015-08-181225-002-100563.0 ppb
2015-08-181225-013-1040ND
2015-08-181225-021-0925ND
2015-08-191225-007-1230ND
2015-08-191225-010-094042.0 ppb
2015-08-191225-016-0945ND
2015-08-191225-023-1140ND
2015-08-191225-024-1255ND
2015-08-241225-008-1305ND
2015-08-251225-003-1155ND
2015-09-091225-002-100549.0 ppb
2015-09-101225-012-0835ND
2015-10-281225-002-112048.0 ppb
2016-02-111225-002-090035.0 ppb
2016-05-091225-002-151042.0 ppb
2016-08-171225-002-110826.0 ppb
2016-11-141225-002-103322.0 ppb
2017-05-171225-002-1315ND
2017-08-101225-002-080547.0 ppb
2017-11-131225-002-091069.0 ppb
2018-02-191225-002-122051.0 ppb
2018-05-031225-002-132056.0 ppb
2018-08-061233-015-0835ND
2018-08-061233-019-1140ND
2018-08-061233-026-0910ND
2018-08-071233-004-1310ND
2018-08-071233-005-0840ND
2018-08-071233-009-1215ND
2018-08-071233-023-1055ND
2018-08-071233-024-0952ND
2018-08-081233-006-1250ND
2018-08-081233-014-1140ND
2018-08-081233-021-1010ND
2018-08-131233-001-1035ND
2018-08-131225-002-0840ND
2018-08-131233-002-0840ND
2018-08-131233-012-0840ND
2018-08-131233-013-0955ND
2018-08-131233-016-1200ND
2018-08-131233-025-1100ND
2018-08-131233-028-1220ND
2018-08-131233-033-1200ND
2018-08-151233-010-084059.0 ppb
2018-08-161233-003-0820ND
2018-08-161233-008-104522.0 ppb
2018-11-071225-002-1025ND
2019-02-051225-002-164032.0 ppb
2019-06-041225-002-161026.0 ppb
2019-08-061225-002-115043.0 ppb
2019-08-194610040121.0 ppb
2019-08-1946100501ND
2019-08-20461001011.10 ppb
2019-08-2046100801ND
2019-08-2046101201ND
2019-08-20461016015.30 ppb
2019-08-2046101901ND
2019-08-2046102001290.0 ppb
2019-08-20461021010.840 ppb
2019-08-21461002017.00 ppb
2019-08-214610030139.0 ppb
2019-08-21461006016.40 ppb
2019-08-214610070137.0 ppb
2019-08-21461010012.40 ppb
2019-08-21461011012.60 ppb
2019-08-21461013010.490 ppb
2019-08-21461014011.10 ppb
2019-08-22461015015.30 ppb
2019-08-22461017014.50 ppb
2019-11-11474210011.10 ppb
2019-11-181225-002-125544.0 ppb
2020-02-0448757801ND
2020-02-0448758901ND
2020-02-0448759001ND
2020-02-05487579011.50 ppb
2020-02-054875800138.0 ppb
2020-02-05487585010.560 ppb
2020-02-0548758801ND
2020-02-054875920113.0 ppb
2020-02-05487594012.30 ppb
2020-02-05487595013.00 ppb
2020-02-10487582010.940 ppb
2020-02-10487584011.20 ppb
2020-02-104875860113.0 ppb
2020-02-104875870119.0 ppb
2020-02-104875910144.0 ppb
2020-02-1148758101210.0 ppb
2020-02-1148758301200.0 ppb
2020-02-114875930122.0 ppb
2020-02-1148759601ND
2020-04-2849145901140.0 ppb
2020-07-235093920143.0 ppb
2020-10-1552308801ND
2020-12-10528154015.20 ppb