The Power of Information

National Drinking Water Database

East Bay Municipal Utility District Utilities - Oakland, CA

Serves 1,300,000 people


Manganese is a naturally occurring element released from mineral deposits as well as industrial use.
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
0 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
212 days
Tests ConductedNumber of individual tests done for this contaminant
316 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
ManganeseManganese is a naturally occurring element released from mineral deposits as well as industrial use.0.05 ppb
11.35 ppb
50 ppb
50 ppb
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Manganese

Health Based Limits for Manganese

EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.50 ppb
National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. Source: U.S. Environmental Protection Agency. 50 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.300 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.300 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1000 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.1600 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-100 ppb110 ppb
2009-03-060 ppb110 ppb
2009-03-050 ppb110 ppb
2009-02-060 ppb220 ppb
2009-01-090 ppb110 ppb
2009-01-080 ppb110 ppb
2008-12-110 ppb110 ppb
2008-12-050 ppb110 ppb
2008-12-040 ppb110 ppb
2008-11-070 ppb110 ppb
2008-11-060 ppb110 ppb
2008-11-040 ppb110 ppb
2008-10-100 ppb110 ppb
2008-10-090 ppb220 ppb
2008-10-070 ppb110 ppb
2008-09-090 ppb110 ppb
2008-09-050 ppb110 ppb
2008-09-040 ppb330 ppb
2008-08-080 ppb110 ppb
2008-08-070 ppb330 ppb
2008-08-050 ppb110 ppb
2008-07-220 ppb110 ppb
2008-07-110 ppb110 ppb
2008-07-100 ppb330 ppb
2008-07-080 ppb110 ppb
2008-06-180 ppb220 ppb
2008-06-170 ppb220 ppb
2008-06-060 ppb110 ppb
2008-06-050 ppb330 ppb
2008-06-030 ppb110 ppb
2008-05-200 ppb110 ppb
2008-05-090 ppb110 ppb
2008-05-080 ppb330 ppb
2008-05-060 ppb110 ppb
2008-05-020 ppb110 ppb
2008-04-110 ppb110 ppb
2008-04-100 ppb330 ppb
2008-04-090 ppb110 ppb
2008-03-200 ppb110 ppb
2008-03-180 ppb110 ppb
2008-03-070 ppb110 ppb
2008-03-060 ppb110 ppb
2008-02-080 ppb110 ppb
2008-02-070 ppb110 ppb
2008-01-110 ppb110 ppb
2008-01-100 ppb110 ppb
2007-12-070 ppb110 ppb
2007-12-060 ppb220 ppb
2007-12-040 ppb110 ppb
2007-11-090 ppb110 ppb
2007-11-080 ppb220 ppb
2007-11-060 ppb110 ppb
2007-11-010 ppb110 ppb
2007-10-120 ppb110 ppb
2007-10-040 ppb330 ppb
2007-10-020 ppb110 ppb
2007-09-120 ppb110 ppb
2007-09-100 ppb110 ppb
2007-09-060 ppb330 ppb
2007-08-130 ppb110 ppb
2007-08-090 ppb330 ppb
2007-08-070 ppb110 ppb
2007-07-240 ppb110 ppb
2007-07-130 ppb110 ppb
2007-07-120 ppb330 ppb
2007-07-100 ppb110 ppb
2007-06-130 ppb110 ppb
2007-06-120 ppb330 ppb
2007-06-110 ppb220 ppb
2007-06-080 ppb220 ppb
2007-06-070 ppb220 ppb
2007-06-050 ppb110 ppb
2007-05-110 ppb110 ppb
2007-05-100 ppb330 ppb
2007-05-080 ppb110 ppb
2007-04-260 ppb110 ppb
2007-04-170 ppb110 ppb
2007-04-060 ppb220 ppb
2007-04-050 ppb110 ppb
2007-03-090 ppb110 ppb
2007-03-080 ppb110 ppb
2007-03-010 ppb220 ppb
2007-02-150 ppb110 ppb
2007-02-130 ppb110 ppb
2007-02-080 ppb330 ppb
2007-02-060 ppb110 ppb
2007-01-120 ppb110 ppb
2007-01-110 ppb220 ppb
2007-01-090 ppb220 ppb
2006-12-070 ppb330 ppb
2006-12-050 ppb220 ppb
2006-11-160 ppb220 ppb
2006-11-140 ppb110 ppb
2006-11-090 ppb110 ppb
2006-11-070 ppb110 ppb
2006-10-170 ppb110 ppb
2006-10-060 ppb110 ppb
2006-10-050 ppb330 ppb
2006-10-030 ppb220 ppb
2006-09-150 ppb110 ppb
2006-09-140 ppb220 ppb
2006-09-130 ppb110 ppb
2006-09-070 ppb110 ppb
2006-08-110 ppb110 ppb
2006-08-100 ppb330 ppb
2006-08-080 ppb110 ppb
2006-07-210 ppb110 ppb
2006-07-200 ppb110 ppb
2006-07-130 ppb220 ppb
2006-07-120 ppb550 ppb
2006-07-110 ppb110 ppb
2006-07-050 ppb110 ppb
2006-06-150 ppb110 ppb
2006-06-090 ppb110 ppb
2006-06-080 ppb220 ppb
2006-06-060 ppb110 ppb
2006-05-050 ppb220 ppb
2006-05-040 ppb110 ppb
2006-05-020 ppb110 ppb
2006-04-070 ppb220 ppb
2006-04-060 ppb110 ppb
2006-04-040 ppb110 ppb
2006-03-230 ppb110 ppb
2006-03-210 ppb110 ppb
2006-03-100 ppb110 ppb
2006-03-090 ppb110 ppb
2006-02-100 ppb110 ppb
2006-02-090 ppb110 ppb
2006-01-130 ppb110 ppb
2006-01-120 ppb110 ppb
2005-12-090 ppb110 ppb
2005-12-080 ppb110 ppb
2005-12-060 ppb110 ppb
2005-11-180 ppb110 ppb
2005-11-170 ppb110 ppb
2005-11-100 ppb220 ppb
2005-11-080 ppb110 ppb
2005-10-070 ppb220 ppb
2005-10-060 ppb220 ppb
2005-10-040 ppb110 ppb
2005-09-160 ppb220 ppb
2005-09-150 ppb220 ppb
2005-09-130 ppb110 ppb
2005-08-120 ppb110 ppb
2005-08-110 ppb110 ppb
2005-08-080 ppb110 ppb
2005-08-040 ppb220 ppb
2005-08-020 ppb110 ppb
2005-07-150 ppb110 ppb
2005-07-140 ppb660 ppb
2005-07-120 ppb220 ppb
2005-07-060 ppb110 ppb
2005-06-100 ppb110 ppb
2005-06-090 ppb330 ppb
2005-06-070 ppb110 ppb
2005-05-120 ppb220 ppb
2005-05-060 ppb110 ppb
2005-05-050 ppb110 ppb
2005-05-030 ppb110 ppb
2005-04-080 ppb110 ppb
2005-04-070 ppb220 ppb
2005-04-050 ppb110 ppb
2005-03-180 ppb110 ppb
2005-03-100 ppb330 ppb
2005-03-080 ppb220 ppb
2005-02-100 ppb330 ppb
2005-02-080 ppb330 ppb
2005-01-130 ppb110 ppb
2005-01-060 ppb220 ppb
2005-01-040 ppb220 ppb
2004-12-090 ppb330 ppb
2004-12-070 ppb220 ppb
2004-11-180 ppb330 ppb
2004-11-160 ppb110 ppb
2004-11-120 ppb110 ppb
2004-11-020 ppb110 ppb
2004-10-140 ppb110 ppb
2004-10-080 ppb110 ppb
2004-10-070 ppb220 ppb
2004-10-050 ppb220 ppb
2004-09-170 ppb110 ppb
2004-09-160 ppb330 ppb
2004-09-140 ppb110 ppb
2004-08-060 ppb110 ppb
2004-08-050 ppb330 ppb
2004-08-030 ppb110 ppb
2004-07-280 ppb220 ppb
2004-07-270 ppb330 ppb
2004-07-160 ppb110 ppb
2004-07-150 ppb330 ppb
2004-07-140 ppb110 ppb
2004-07-060 ppb110 ppb
2004-06-150 ppb220 ppb
2004-06-110 ppb110 ppb
2004-06-100 ppb330 ppb
2004-06-080 ppb110 ppb
2004-05-130 ppb110 ppb
2004-05-070 ppb110 ppb
2004-05-0611.35 ppb210 to 22.7 ppb
2004-05-040 ppb110 ppb
2004-04-220 ppb110 ppb
2004-04-090 ppb110 ppb
2004-04-080 ppb220 ppb
2004-04-070 ppb110 ppb
2004-03-290 ppb110 ppb
2004-03-110 ppb110 ppb
2004-03-040 ppb110 ppb
2004-02-130 ppb110 ppb
2004-02-050 ppb110 ppb
2004-01-090 ppb110 ppb
2004-01-080 ppb220 ppb
2004-01-060 ppb110 ppb