Kalamazoo River Water Quality Assessment of Trends 19982007

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Kalamazoo River Water Quality Assessment of
Trends (1998-2007)

• PS Compliance (2005-2007)
• Flow data
• Non-point Sources Loads
• 1998-2007
• Monthly trends
• Seasonal trends
• MSU/MDEQ 1998 to 2005 data comparison
• Cumulative Loads and Seasonal Trends
• NPS Load Distribution Re-visited

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6,700 lbs/month WLA
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Kalamazoo River Flows (cfs)
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Relationship Between Flow at Allegan, Plainwell
and Comstock
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NPS Loads to Kalamazoo River
NPS Goals Apr-Jun 9,600 lbs.P/month Jul-Sep
3,950 lbs.P/month
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NPS Loading at M-89, April
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NPS Loading at M-89, May
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NPS Loading at M-89, June
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NPS Loading at M-89, July
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NPS Loading at M-89, August
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NPS Loading at M-89, September
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Nearly 20 NPS loading reduction between 1998
and 2005 (MDEQ 2006)
Median Monthly Growing Season Loads
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Mean Monthly NPS Phosphorus Loading by
Year during the Growing Season (April-Sept) _at_ M-89
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Cumulative Phosphorus Loads by Month
Total Load Goals April-June Goal 18,400
lbs./month July-Sept. Goal 10,700 lbs./month
Target Dates PS WLA by 2006 NPS LA 10 by 2005
40 by 2009 Load Goals by 2012 WQ
Goals by 2015
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Total Phosphorus Load at M-89 April - June
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Total Phosphorus Load at M-89 July - September
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Point Source Phosphorus Load April - June
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Point Source Phosphorus Load July - September
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Median NPS Phosphorus Loads April - June
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Median NPS Phosphorus Loads July - September
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Loading Summary

• Point source loads exceeded Aug. 2005 monthly WLA
  
• No statistically significant trends noted for
  non-point source loads from 1999-2007
• 2005 DEQ/MSUE Public pronouncement of 18
  reduction in total phosphorus was NOT
  substantiated and has been increasing over the
  last two years.
• Point source reductions from 1999-2007 are
  statistically significant
• Nine years of data suggest there has been NO
  significant progress towards meeting LA
• DEQ data reports not published since 2004
• Future MDEQ monitoring is limited or non-existent
  
• Urban sources continue to contribute nearly ½ of
  the total phosphorus load but only comprise 8 of
  the total land area

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