The Power of Information

National Drinking Water Database


Artesian Water Company Utilities - Wilmington, DE


Serves 201,000 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
11 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)
11 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
155 days
Tests ConductedNumber of individual tests done for this contaminant
348 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.24.35 ppb
203.5 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
2007-12-2617.5 ppb2013 to 22 ppb
2007-12-1820 ppb2013 to 27 ppb
2007-12-1023 ppb2018 to 28 ppb
2007-12-0420 ppb2011 to 29 ppb
2007-12-0316 ppb1016 ppb
2007-11-2713.67 ppb306 to 19 ppb
2007-11-1912 ppb1012 ppb
2007-11-139 ppb109 ppb
2007-11-057.33 ppb310 to 13 ppb
2007-10-295 ppb210 to 10 ppb
2007-10-2212 ppb2012 ppb
2007-10-1517.5 ppb2010 to 25 ppb
2007-10-0918 ppb2013 to 23 ppb
2007-10-0324 ppb1024 ppb
2007-10-0116.5 ppb2013 to 20 ppb
2007-09-2417.5 ppb2011 to 24 ppb
2007-09-17121 ppb2012 to 230 ppb
2007-09-1021 ppb2014 to 28 ppb
2007-09-0415.67 ppb3012 to 21 ppb
2007-08-2717 ppb2013 to 21 ppb
2007-08-2117.5 ppb2015 to 20 ppb
2007-08-1417 ppb2013 to 21 ppb
2007-08-0757 ppb1057 ppb
2007-08-0616 ppb2012 to 20 ppb
2007-08-0238.33 ppb310 to 58 ppb
2007-07-3016.5 ppb2013 to 20 ppb
2007-07-2522 ppb1022 ppb
2007-07-2323.5 ppb2020 to 27 ppb
2007-07-2013 ppb1013 ppb
2007-07-1927 ppb1027 ppb
2007-07-1029 ppb2028 to 30 ppb
2007-07-0223.33 ppb3021 to 25 ppb
2007-06-206 ppb210 to 12 ppb
2007-06-130 ppb110 ppb
2007-06-1120.5 ppb2017 to 24 ppb
2007-06-0415.5 ppb2014 to 17 ppb
2007-05-2917 ppb2013 to 21 ppb
2007-05-232.17 ppb640 to 7 ppb
2007-05-2116 ppb2014 to 18 ppb
2007-05-1616.5 ppb2015 to 18 ppb
2007-05-0912 ppb1012 ppb
2007-05-0716 ppb2013 to 19 ppb
2007-05-0116 ppb2014 to 18 ppb
2007-04-258 ppb410 to 14 ppb
2007-04-2318.5 ppb2017 to 20 ppb
2007-04-1819.5 ppb2016 to 23 ppb
2007-04-1015.5 ppb2014 to 17 ppb
2007-04-0511.5 ppb208 to 15 ppb
2007-04-0417.5 ppb2011 to 24 ppb
2007-03-2923 ppb1023 ppb
2007-03-204 ppb320 to 12 ppb
2007-03-1923 ppb1023 ppb
2007-03-1427 ppb1027 ppb
2007-03-0619.33 ppb3014 to 26 ppb
2007-03-0519 ppb1019 ppb
2007-03-0127 ppb1027 ppb
2007-02-2218.25 ppb410 to 26 ppb
2007-02-210 ppb550 ppb
2007-02-1322 ppb1022 ppb
2007-02-0827 ppb1027 ppb
2007-01-2927 ppb1027 ppb
2007-01-2560 ppb3026 to 127 ppb
2007-01-1723.33 ppb3019 to 30 ppb
2007-01-1019 ppb2012 to 26 ppb
2007-01-097.5 ppb210 to 15 ppb
2007-01-0348.33 ppb310 to 131 ppb
2006-01-3010.5 ppb208 to 13 ppb
2006-01-2914 ppb2014 ppb
2006-01-2825 ppb310 to 64 ppb
2006-01-270.9 ppb200.9 ppb
2006-01-260 ppb110 ppb
2006-01-2520 ppb710 to 32 ppb
2006-01-240 ppb110 ppb
2006-01-2311 ppb1011 ppb
2006-01-220 ppb110 ppb
2006-01-210 ppb110 ppb
2006-01-18160.2 ppb510 to 758 ppb
2006-01-1636 ppb2010 to 62 ppb
2006-01-1414 ppb210 to 28 ppb
2006-01-1312.5 ppb2012 to 13 ppb
2006-01-127.67 ppb1280 to 66 ppb
2006-01-119 ppb109 ppb
2006-01-1014 ppb1014 ppb
2006-01-0731.8 ppb510 to 120 ppb
2006-01-0620.5 ppb410 to 40 ppb
2006-01-0521.43 ppb720 to 110 ppb
2006-01-0429.5 ppb2012 to 47 ppb
2006-01-0313.5 ppb2012 to 15 ppb
2006-01-0230 ppb3012 to 49 ppb
2005-01-2816 ppb409 to 24 ppb
2005-01-278 ppb108 ppb
2005-01-253.5 ppb210 to 7 ppb
2005-01-239.33 ppb320 to 28 ppb
2005-01-2270.33 ppb310 to 177 ppb
2005-01-21203.5 ppb2023 to 384 ppb
2005-01-19179 ppb2042 to 316 ppb
2005-01-170 ppb440 ppb
2005-01-163.5 ppb210 to 7 ppb
2005-01-150 ppb220 ppb
2005-01-1330.5 ppb420 to 93 ppb
2005-01-0958 ppb1058 ppb
2005-01-030 ppb110 ppb
2004-12-090 ppb110 ppb
2004-10-0834 ppb1034 ppb
2004-09-2726 ppb1026 ppb
2004-09-1430 ppb1030 ppb
2004-08-3126 ppb1026 ppb
2004-08-2031 ppb1031 ppb
2004-08-1631 ppb1031 ppb
2004-07-2331 ppb1031 ppb
2004-07-2035 ppb1035 ppb
2004-07-1629 ppb1029 ppb
2004-07-159 ppb109 ppb
2004-07-0933 ppb1033 ppb
2004-06-1837 ppb2034 to 40 ppb
2004-06-150 ppb220 ppb
2004-05-2771 ppb1071 ppb
2004-05-204 ppb210 to 8 ppb
2004-05-1332 ppb1032 ppb
2004-04-290 ppb110 ppb
2004-04-2836 ppb1036 ppb
2004-04-270 ppb110 ppb
2004-04-150 ppb110 ppb
2004-03-300 ppb110 ppb
2004-03-2415 ppb210 to 30 ppb
2004-03-1939 ppb1039 ppb
2004-03-184.5 ppb210 to 9 ppb
2004-03-0832 ppb1032 ppb
2004-02-2733 ppb1033 ppb
2004-02-252.5 ppb210 to 5 ppb
2004-02-2038 ppb1038 ppb
2004-02-1928 ppb1028 ppb
2004-02-1348 ppb1048 ppb
2004-02-030 ppb110 ppb
2004-01-3126 ppb1026 ppb
2004-01-300 ppb110 ppb
2004-01-290 ppb110 ppb
2004-01-2819.6 ppb5011 to 36 ppb
2004-01-2732.5 ppb410 to 71 ppb
2004-01-252.5 ppb210 to 5 ppb
2004-01-2415 ppb210 to 30 ppb
2004-01-2331 ppb1031 ppb
2004-01-2016.22 ppb920 to 38 ppb
2004-01-1932 ppb3028 to 39 ppb
2004-01-1816.33 ppb310 to 40 ppb
2004-01-1631.33 ppb3029 to 34 ppb
2004-01-1523.38 ppb1370 to 75 ppb
2004-01-1426.22 ppb950 to 71 ppb
2004-01-1340 ppb2032 to 48 ppb
2004-01-11137 ppb10137 ppb
2004-01-0943.75 ppb410 to 77 ppb
2004-01-0832 ppb3030 to 34 ppb
2004-01-0568 ppb1068 ppb
2004-01-0431 ppb1031 ppb
2004-01-036 ppb650 to 36 ppb