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EWG's Tap Water Database — 2021 UPDATE

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Manganese

California American Water Company - Monterey

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

 

154

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201446.1 ppb3213ND - 275.0 ppb
20158.89 ppb191ND - 169.0 ppb
20161.31 ppb291ND - 38.0 ppb
2017ND170ND
20183.81 ppb2812ND - 26.0 ppb
20193.19 ppb294ND - 51.0 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
2014-01-071225-024-1015ND
2014-01-091225-053-1206ND
2014-01-131225-020-1050102.0 ppb
2014-01-131225-054-0930223.0 ppb
2014-01-211225-089-114025.0 ppb
2014-01-221225-092-114526.0 ppb
2014-02-181225-054-1225275.0 ppb
2014-02-191225-053-1025ND
2014-03-061225-053-1315ND
2014-04-081225-082-1125ND
2014-04-091225-024-1330ND
2014-04-091225-053-1202ND
2014-04-101225-061-1250ND
2014-04-141225-054-1345174.0 ppb
2014-04-151225-020-1330134.0 ppb
2014-04-241225-092-100527.0 ppb
2014-04-291225-089-103034.0 ppb
2014-05-051225-079-142024.0 ppb
2014-05-071225-053-1003ND
2014-06-111225-053-1000ND
2014-07-021225-054-1330215.0 ppb
2014-07-071225-024-1115ND
2014-07-081225-020-1100112.0 ppb
2014-07-081225-053-1100ND
2014-08-121225-053-0920ND
2014-09-181225-053-1330ND
2014-10-061225-024-1300ND
2014-10-071225-020-1005103.0 ppb
2014-10-091225-053-0945ND
2014-11-131225-053-0910ND
2014-12-081225-053-1300ND
2014-12-231225-085-0915ND
2015-01-051225-024-1035ND
2015-01-061225-053-1405ND
2015-01-081225-020-1350169.0 ppb
2015-02-101225-085-1330ND
2015-02-111225-053-1340ND
2015-03-171225-053-1205ND
2015-04-091225-082-0935ND
2015-04-141225-053-1135ND
2015-04-301225-024-0905ND
2015-05-131225-053-1430ND
2015-06-111225-053-1420ND
2015-07-091225-053-1430ND
2015-07-201225-024-1115ND
2015-08-051225-053-1425ND
2015-09-021225-053-1120ND
2015-10-151225-053-1035ND
2015-10-211225-024-1430ND
2015-11-121225-053-1010ND
2015-12-101225-053-1125ND
2016-01-071225-024-0845ND
2016-01-071225-085-1505ND
2016-01-121225-046-1355ND
2016-01-181225-053-1340ND
2016-02-081225-016-1030ND
2016-02-081225-017-1000ND
2016-02-081225-044-1230ND
2016-02-081225-045-1200ND
2016-02-081225-047-1100ND
2016-02-181225-053-1420ND
2016-03-031225-053-1355ND
2016-04-061225-024-1410ND
2016-04-071225-082-1010ND
2016-04-131225-053-1025ND
2016-04-191225-029-100038.0 ppb
2016-04-191225-051-1100ND
2016-04-261225-048-1115ND
2016-05-121225-053-1350ND
2016-06-091225-053-1115ND
2016-07-061225-053-1445ND
2016-08-181225-053-1410ND
2016-08-221225-070-1010ND
2016-08-291225-050-1215ND
2016-09-141225-053-1400ND
2016-10-241225-053-1100ND
2016-11-081225-053-1410ND
2016-12-011225-024-1240ND
2016-12-051225-053-1400ND
2016-12-201225-085-1135ND
2017-01-091225-024-1130ND
2017-01-191225-053-1250ND
2017-02-271225-053-1050ND
2017-03-161225-053-0950ND
2017-04-131225-053-1030ND
2017-04-171225-024-0936ND
2017-04-171225-082-1045ND
2017-05-011225-053-1030ND
2017-06-141225-053-1025ND
2017-07-121225-024-1105ND
2017-07-191225-053-1156ND
2017-08-081225-053-1107ND
2017-09-071225-053-1030ND
2017-10-021225-024-1245ND
2017-10-041225-053-1504ND
2017-11-081225-053-1112ND
2017-12-051225-053-1015ND
2018-01-101225-053-1011ND
2018-01-111225-024-1026ND
2018-02-071225-053-1007ND
2018-03-081225-053-0815ND
2018-04-031225-053-0900ND
2018-04-043923390114.0 ppb
2018-05-011225-082-0920ND
2018-05-031225-053-0925ND
2018-05-10392336012.70 ppb
2018-05-171225-024-125022.0 ppb
2018-06-061225-053-0900ND
2018-07-02403205011.80 ppb
2018-07-023923370118.0 ppb
2018-07-184062050126.0 ppb
2018-07-231225-053-0930ND
2018-08-071225-053-0900ND
2018-09-121225-053-1248ND
2018-09-251225-024-0850ND
2018-10-01416620012.10 ppb
2018-10-091225-053-0900ND
2018-10-104166210113.0 ppb
2018-11-121225-053-1010ND
2018-12-041225-024-0930ND
2018-12-061225-053-0946ND
2018-12-18416614012.10 ppb
2018-12-18416615013.60 ppb
2018-12-20416616010.790 ppb
2018-12-20416617010.530 ppb
2019-01-071225-053-1355ND
2019-01-09424318012.40 ppb
2019-01-094166130110.00 ppb
2019-01-151225-085-1545ND
2019-02-061225-053-1430ND
2019-02-071225-016-1335ND
2019-02-071225-017-1300ND
2019-02-071225-044-1650ND
2019-02-071225-045-1710ND
2019-02-071225-046-1430ND
2019-02-071225-047-1515ND
2019-02-274166190151.0 ppb
2019-03-071225-053-1245ND
2019-03-191225-029-1330ND
2019-03-191225-051-1230ND
2019-03-201225-024-1228ND
2019-03-211225-050-141529.0 ppb
2019-04-161225-053-1330ND
2019-05-061225-082-1350ND
2019-05-141225-053-1710ND
2019-06-241225-053-1550ND
2019-07-111225-053-1520ND
2019-07-241225-048-1420ND
2019-08-081225-053-1245ND
2019-08-081225-070-1530ND
2019-09-181225-053-1517ND
2019-10-221225-053-1405ND
2019-11-141225-053-1450ND
2019-12-111225-053-1200ND