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Metropolitan Council <br />AA <br />The output levels of the <br />studied pollutants, with the 100 - <br />exception of nitrogen, <br />remained stable in 2010 80 - <br />and improved compared to <br />2000. Some variability y 60 - <br />from year to year is <br />expected due to weather <br />conditions and sampling =- 40 - <br />error. Despite variability, <br />the general trend for 20 - <br />phosphorus and <br />suspended solids over 0 <br />2000-10 has been <br />downward (improving). <br />The output level of <br />Tor <br />Total Nitrogen <br />Regional Benchmarks <br />Measuring Our Progress <br />2011 Update <br />16.0 % <br />A 14.0% <br />- 20 <br />- 15 <br />7.1 % - 10 <br />4 <br />- -10 <br />2000 2003 2004 2005 2006 2007 2008 2009 2010 <br />Input Output Target Load o % Difference <br />-15 <br />nitrogen remains higher than the input level, although both are significantly lower compared to <br />2000. <br />1,600 - <br />1,400 <br />N 1,200 <br />1,000 <br />0 800 <br />H <br />• 600 <br />c 400 <br />0 <br />H <br />Total Suspended Solid Load <br />_ -27.6% <br />A <br />200 - M O <br />co <br />0 <br />-36.5% <br />4 <br />v <br />V O <br />� <br />O <br />M Oo <br />N <br />4P <br />N <br />N ON <br />N- W <br />ir <br />A -36.6% <br />A <br />0 <br />N <br />1 <br />-34.1% <br />O <br />O <br />r <br />-29.8% <br />A <br />CS) <br />CO <br />-i2% <br />A -30.6% <br />A <br />a CO <br />LO <br />2000 2003 2004 2005 2006 2007 2008 2009 <br />Input Output Target Load o % Difference <br />Source: Metropolitan Council Environmental Services. <br />2010 <br />0 <br />-10 <br />-20 <br />a) <br />2 • 0- <br />DO <br />ots <br />-30 c <br />a) a <br />2 C <br />a <br />-40 <br />50 <br />15 <br />