The Power of Information

National Drinking Water Database


City of Fresno Water Division Utilities - Fresno, CA


Serves 390,350 people

Manganese

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
7 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)
7 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
99 days
Tests ConductedNumber of individual tests done for this contaminant
497 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

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.10.83 ppb
350 ppb
Yes
50 ppb
Yes
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

StandardDescriptionLevel
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
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2008-11-210 ppb110 ppb
2008-11-070 ppb110 ppb
2008-11-040 ppb110 ppb
2008-10-2430 ppb430 to 120 ppb
2008-10-1066 ppb1066 ppb
2008-10-010 ppb770 ppb
2008-09-1930 ppb430 to 120 ppb
2008-08-280 ppb110 ppb
2008-08-220 ppb220 ppb
2008-08-200 ppb770 ppb
2008-08-150 ppb990 ppb
2008-08-140 ppb990 ppb
2008-08-1211.82 ppb11100 to 130 ppb
2008-08-110 ppb990 ppb
2008-08-08190 ppb10190 ppb
2008-08-070 ppb220 ppb
2008-08-0526.67 ppb980 to 240 ppb
2008-08-040 ppb550 ppb
2008-08-010 ppb10100 ppb
2008-07-310 ppb440 ppb
2008-07-30350 ppb10350 ppb
2008-07-2913 ppb1090 to 130 ppb
2008-07-280 ppb660 ppb
2008-07-250 ppb10100 ppb
2008-07-242.3 ppb1090 to 23 ppb
2008-07-230 ppb990 ppb
2008-07-220 ppb10100 ppb
2008-07-210 ppb10100 ppb
2008-07-180 ppb10100 ppb
2008-07-170 ppb550 ppb
2008-07-160 ppb10100 ppb
2008-07-150 ppb990 ppb
2008-07-140 ppb10100 ppb
2008-07-110 ppb10100 ppb
2008-07-100 ppb10100 ppb
2008-07-090 ppb10100 ppb
2008-07-080 ppb10100 ppb
2007-11-130 ppb110 ppb
2007-10-310 ppb110 ppb
2007-09-280 ppb110 ppb
2007-08-300 ppb110 ppb
2007-08-280 ppb110 ppb
2007-08-2046 ppb1046 ppb
2007-06-2665 ppb210 to 130 ppb
2007-04-190 ppb110 ppb
2006-12-2265 ppb210 to 130 ppb
2006-08-180 ppb220 ppb
2006-07-250 ppb110 ppb
2006-07-120 ppb330 ppb
2006-06-270 ppb220 ppb
2006-05-260 ppb110 ppb
2006-05-020 ppb110 ppb
2006-01-040 ppb550 ppb
2006-01-030 ppb110 ppb
2005-09-280 ppb110 ppb
2005-09-130 ppb110 ppb
2005-08-250 ppb110 ppb
2005-08-110 ppb110 ppb
2005-08-0325 ppb210 to 50 ppb
2005-07-260 ppb110 ppb
2005-07-190 ppb110 ppb
2005-07-130 ppb110 ppb
2005-07-120 ppb110 ppb
2005-07-110 ppb220 ppb
2005-06-290 ppb330 ppb
2005-06-230 ppb10100 ppb
2005-06-220 ppb880 ppb
2005-05-250 ppb110 ppb
2005-05-180 ppb110 ppb
2005-05-130 ppb110 ppb
2005-05-120 ppb110 ppb
2005-05-110 ppb440 ppb
2005-05-100 ppb10100 ppb
2005-05-060 ppb330 ppb
2005-05-040 ppb550 ppb
2005-05-030 ppb660 ppb
2005-05-020 ppb110 ppb
2005-04-290 ppb440 ppb
2005-04-280 ppb440 ppb
2005-04-270 ppb330 ppb
2005-04-260 ppb660 ppb
2005-04-250 ppb220 ppb
2005-04-220 ppb770 ppb
2005-04-211.33 ppb15140 to 20 ppb
2005-04-190 ppb14140 ppb
2005-04-150 ppb880 ppb
2005-04-140 ppb15150 ppb
2005-04-120 ppb880 ppb
2005-04-080 ppb16160 ppb
2005-04-070 ppb15150 ppb
2005-04-060 ppb15150 ppb
2005-04-050 ppb15150 ppb
2005-03-1660 ppb1060 ppb
2004-10-260 ppb110 ppb
2004-09-140 ppb110 ppb
2004-07-200 ppb220 ppb
2004-05-180 ppb110 ppb
2004-05-070 ppb110 ppb
2004-04-2090 ppb210 to 180 ppb