The Power of Information

National Drinking Water Database


City of Modesto Utilities - Modesto, CA


Serves 190,106 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
41 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)
41 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
161 days
Tests ConductedNumber of individual tests done for this contaminant
271 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.41.41 ppb
205 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
2009-03-240 ppb220 ppb
2009-03-170 ppb220 ppb
2009-03-100 ppb110 ppb
2009-03-030 ppb220 ppb
2009-02-190 ppb110 ppb
2009-02-100 ppb330 ppb
2008-12-180 ppb110 ppb
2008-11-120 ppb110 ppb
2008-08-120 ppb110 ppb
2008-06-240 ppb110 ppb
2008-06-170 ppb110 ppb
2008-06-120 ppb110 ppb
2008-06-100 ppb110 ppb
2008-06-030 ppb110 ppb
2008-05-23205 ppb210 to 410 ppb
2008-05-22200 ppb210 to 400 ppb
2008-05-21200 ppb210 to 400 ppb
2008-05-20195 ppb210 to 390 ppb
2008-05-19195 ppb210 to 390 ppb
2008-05-18195 ppb210 to 390 ppb
2008-05-17190 ppb210 to 380 ppb
2008-05-16200 ppb210 to 400 ppb
2008-05-15190 ppb210 to 380 ppb
2008-05-14185 ppb210 to 370 ppb
2008-05-13123.33 ppb320 to 370 ppb
2008-05-12185 ppb210 to 370 ppb
2008-05-11185 ppb210 to 370 ppb
2008-05-10180 ppb210 to 360 ppb
2008-05-09180 ppb210 to 360 ppb
2008-05-08180 ppb210 to 360 ppb
2008-05-07175 ppb210 to 350 ppb
2008-05-06116.67 ppb320 to 350 ppb
2008-05-05170 ppb210 to 340 ppb
2008-05-04165 ppb210 to 330 ppb
2008-05-03170 ppb210 to 340 ppb
2008-05-02160 ppb210 to 320 ppb
2008-05-01155 ppb210 to 310 ppb
2008-04-30150 ppb210 to 300 ppb
2008-04-2972.5 ppb430 to 290 ppb
2008-04-28135 ppb210 to 270 ppb
2008-04-27130 ppb210 to 260 ppb
2008-04-26115 ppb210 to 230 ppb
2008-04-25100 ppb210 to 200 ppb
2008-04-2470 ppb210 to 140 ppb
2008-04-2326 ppb210 to 52 ppb
2008-04-220 ppb110 ppb
2008-04-080 ppb110 ppb
2008-03-270 ppb220 ppb
2008-03-180 ppb110 ppb
2008-03-060 ppb110 ppb
2008-02-140 ppb110 ppb
2008-01-290 ppb110 ppb
2008-01-220 ppb220 ppb
2008-01-150 ppb440 ppb
2007-12-180 ppb110 ppb
2007-11-280 ppb110 ppb
2007-11-15165 ppb210 to 330 ppb
2007-11-14160 ppb210 to 320 ppb
2007-11-13160 ppb210 to 320 ppb
2007-11-12160 ppb210 to 320 ppb
2007-11-11145 ppb210 to 290 ppb
2007-11-10160 ppb210 to 320 ppb
2007-11-09155 ppb210 to 310 ppb
2007-11-08155 ppb210 to 310 ppb
2007-11-07140 ppb210 to 280 ppb
2007-11-06100 ppb210 to 200 ppb
2007-10-160 ppb110 ppb
2007-07-240 ppb110 ppb
2007-06-180 ppb110 ppb
2007-05-240 ppb110 ppb
2007-05-150 ppb440 ppb
2007-04-178 ppb430 to 32 ppb
2007-04-160 ppb220 ppb
2007-04-100 ppb220 ppb
2007-04-040 ppb220 ppb
2007-04-020 ppb220 ppb
2007-03-150 ppb220 ppb
2007-03-140 ppb220 ppb
2007-03-070 ppb220 ppb
2007-02-140 ppb110 ppb
2007-02-070 ppb220 ppb
2007-02-060 ppb110 ppb
2006-12-200 ppb110 ppb
2006-12-190 ppb220 ppb
2006-12-070 ppb110 ppb
2006-11-210 ppb110 ppb
2006-11-150 ppb220 ppb
2006-07-250 ppb110 ppb
2006-07-180 ppb110 ppb
2006-06-280 ppb110 ppb
2006-06-210 ppb110 ppb
2006-05-170 ppb110 ppb
2006-05-030 ppb110 ppb
2006-04-040 ppb110 ppb
2006-03-280 ppb220 ppb
2006-03-220 ppb110 ppb
2006-03-080 ppb110 ppb
2006-02-280 ppb110 ppb
2006-02-210 ppb220 ppb
2006-02-150 ppb220 ppb
2006-02-140 ppb110 ppb
2006-02-070 ppb220 ppb
2005-12-060 ppb110 ppb
2005-11-220 ppb110 ppb
2005-11-080 ppb220 ppb
2005-11-010 ppb110 ppb
2005-10-190 ppb110 ppb
2005-10-040 ppb110 ppb
2005-09-060 ppb110 ppb
2005-09-010 ppb110 ppb
2005-08-250 ppb110 ppb
2005-08-0220 ppb1020 ppb
2005-07-270 ppb220 ppb
2005-07-2650 ppb1050 ppb
2005-07-130 ppb110 ppb
2005-07-120 ppb110 ppb
2005-07-060 ppb110 ppb
2005-06-280 ppb110 ppb
2005-06-160 ppb110 ppb
2005-06-150 ppb110 ppb
2005-06-080 ppb110 ppb
2005-06-070 ppb110 ppb
2005-05-250 ppb220 ppb
2005-05-240 ppb110 ppb
2005-05-190 ppb110 ppb
2005-05-100 ppb220 ppb
2005-05-030 ppb110 ppb
2005-04-260 ppb110 ppb
2005-04-190 ppb110 ppb
2005-04-130 ppb110 ppb
2005-04-120 ppb110 ppb
2005-04-050 ppb110 ppb
2005-03-170 ppb110 ppb
2005-03-100 ppb220 ppb
2005-03-030 ppb110 ppb
2005-02-170 ppb330 ppb
2005-02-030 ppb440 ppb
2005-01-270 ppb220 ppb
2005-01-200 ppb440 ppb
2005-01-130 ppb220 ppb
2005-01-060 ppb440 ppb
2004-12-3020 ppb1020 ppb
2004-12-090 ppb220 ppb
2004-11-180 ppb110 ppb
2004-11-040 ppb440 ppb
2004-10-140 ppb110 ppb
2004-10-070 ppb220 ppb
2004-09-160 ppb110 ppb
2004-09-090 ppb220 ppb
2004-08-1220 ppb430 to 80 ppb
2004-08-0520 ppb1020 ppb
2004-07-0890 ppb1090 ppb
2004-06-0740 ppb1040 ppb
2004-04-150 ppb220 ppb
2004-04-080 ppb440 ppb
2004-03-110 ppb330 ppb
2004-03-040 ppb110 ppb
2004-02-120 ppb110 ppb
2004-02-050 ppb330 ppb
2004-01-150 ppb110 ppb
2004-01-080 ppb110 ppb