The Metropolitan Council calculates pollutant loads to understand sources of pollutants to the major rivers, track pollutant hotspots, and understand pollutant additions and losses through the metro area.
Pollutant loads are calculated for sites on the Mississippi, Minnesota, and St. Croix Rivers, as well on sites on major tributary streams in the metro area. Starting in 2015, pollutant loads are calculated for the following pollutants: Total Suspended Solids (TSS), Total Phosphorus (TP), NOx (Nitrate(NO3)+Nitrate(NO2)), Total Kjeldahl Nitrogen (TKN), and Chloride (Cl). Historically loads were also calculated for Nitrate (NO3), Ammonia (NH3), Total Dissolved Phosphorus (TDP), and Volatile Suspended Solids (VSS). The current suite of parameters was selected to be in line with the MPCA Watershed Pollutant Load Monitoring Network (WPLMN) program and to reduce redundancy.
River Pollutant Load Data (Last updated 5/19/17)
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| River Load Calculation SOP |
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This Standard Operating Procedure (SOP) describes the MCES method for calculating annual and monthly river pollutant loads using the Army Corps of Engineers program Flux32. |
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Annual Loads |
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Monthly Loads 1976-2015 |
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Metro Area River Annual Loads 1976-2015
(contains loads for Minnesota River at Fort Snelling, Minnesota River at Jordan, Mississippi River at Anoka, Mississippi River at Lock & Dam 1, Mississippi River at St. Paul, Mississippi River at Grey Cloud Island, Mississippi River at Lock & Dam 2, Mississippi River at Lock & Dam 3, St. Croix River at Stillwater.) |
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Mississippi River at Anoka |
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Mississippi River at St. Paul |
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Mississippi River at Lock & Dam No. 3 |
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Minnesota River at Jordan |
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Minnesota River at Fort Snelling |
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St. Croix River at Stillwater |
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To get your name on our pollutant load update email list - send us an email (Emily.Resseger@metc.state.mn.us) with “Pollutant Load Updates” in the subject line.