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Upper Midwest Environmental Sciences Center

Water quality update title page

Comparison of 2011 water quality conditions to normal conditions *

Key: H = very high
  h = high
  . = normal
  L = low
  l = very low
 
Reach Season Stratum TEMP DO COND pH TURB SS VSS CHL TN NOX NHX TP SRP
Pool 4 Winter POOL l . . . . . . l H h . . .
  MC . . . . . . . . h . . . .
  SC . . . . . . . . H . . . .
  BWC . . . . . . . . h h . . .
  LP . . . . . . . . H h . . .
Spring POOL L . . . l . . . . . . . .
  MC L . . . . . . . . . . . .
  SC L . . . l . . . . . . . .
  BWC . . . . . . . . . . . . .
  LP l . . . . . . . . . . . .
Summer POOL . . H . L l . . . . . . .
  MC . l h . l l l . . . . . .
  SC . l h . l l . . . . . . .
  BWC . . . . . . . l . . . . .
  LP . . . . l . . . . . . . .
Fall POOL H . H . l . . . . . . . .
  MC . . h . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC h . . . l . . . . . . . .
  LP H . H h l . . . . . . . .
  TEMP DO COND pH TURB SS VSS CHL TN NOX NHX TP SRP
Pool 8 Winter POOL l . . . . . . l H H . . .
  MC L . . . . . . . H H . . .
  SC l . . . . . . . H H . . .
  BWC . . . . . . . . h h . . .
  IMP . . . . . . . . H h . . .
Spring POOL L . . . . . . . . . l . .
  MC . . . . . . . . . . . . .
  SC L . . . . . . . . . . . .
  BWC l . . . . . . . . . . . .
  IMP L . . . . . . . . . . . .
Summer POOL . . h l . . L L . . . . .
  MC . . H l . . . . . . . . .
  SC . . h . . . . . . . . . .
  BWC . . h . . . L l . . . . .
  IMP . . h l . . . . . . . . .
Fall POOL . . . . . . . . . . . . .
  MC . . H . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC . . . . . . . . . . . . .
  IMP . . . . . . . . . . . . .
  TEMP DO COND pH TURB SS VSS CHL TN NOX NHX TP SRP
Pool 13 Winter POOL . . . . . . . l h h . . .
  MC . . . . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC l . . . . . . l . h . . .
  IMP . . . . . . . . . . . . .
Spring POOL . . . . L . . . . . L . .
  MC . . . . L . . . . . l . .
  SC . . . . L . . . . . l . .
  BWC . . . . l . . . . . . . .
  IMP . . . . . . . . . . l . .
Summer POOL . . . l . . . l . . . . .
  MC . . h . . . . . . . . . .
  SC . . h . . . . . . . . . .
  BWC . . . . . . . l . . . . .
  IMP . . . . . . . l . . . . .
Fall POOL . . . . . . . . . . . . .
  MC . . . . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC . . . . . . . . . . . . .
  IMP . . . . . . . . . . . . .
  TEMP DO COND pH TURB SS VSS CHL TN NOX NHX TP SRP
Pool 26 Winter POOL l . . . l l . l . . . . .
  MC . . . . l l . . . . . . .
  SC . . . . . . . L . . . . .
  BWC . . . . . . . . . . . . .
  SL . . . . . . . . . . . . .
  IMP . . . . . l . . . . . . .
Spring POOL . . . . . . . . . . . . .
  MC . . . . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC . . . . . . . . . . . . .
  SL . . . . . . . . . . . . .
  IMP . . . . . . . . . . . . .
Summer POOL . . H L . . . . . . . . .
  MC . . . L . . . . . . . . .
  SC . . H L . . . . . . . . .
  BWC H . . L . . . . . . . . .
  SL . . . . . . . . . . . . .
  IMP h . . l . . . . . . . . .
Fall POOL . . . . . . . . l l . l .
  MC . . . . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC . . . . . . . . . . . . .
  SL . . . . . . . . . . . . .
  IMP . . . . . . . h . . . . .
  TEMP DO COND pH TURB SS VSS CHL TN NOX NHX TP SRP
Open River Winter POOL . . . . L L L . . . . . .
  MC . . . . L L L . . . . . .
  SC . . . . . . . . . . . . .
Spring POOL . . . . . . . . . . . . .
  MC . . . . . . . . . . . . .
  SC . . . . . . . . . . . . .
Summer POOL H L H . . . . . . . . . .
  MC H L H . . . . . . . . . .
  SC H L H . . . . . . . . . .
Fall POOL . . h . . . . . . l . . .
  MC . . h . . . . . . l . . .
  SC . . . H . . . . . . . . .
  TEMP DO COND pH TURB SS VSS CHL TN NOX NHX TP SRP
La Grange Winter POOL . . . . . . . . . . . . .
  MC . . . . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC . . . . . . . . l . . . .
Spring POOL . . . . . . . L . . . . .
  MC . . . . . . . L . . . . .
  SC . . . . . . . L . . . . .
  BWC . . . . . . . l . . . . .
Summer POOL H l . . . . . . . . . . .
  MC . . . . . . . . . . . . .
  SC H l . . . . . . . . . . .
  BWC h . . . . . . . . . . . .
Fall POOL . . h . . . . . . . . . .
  MC . . . . . . . . . . . . .
  SC . . . . . . . . . . . . .
  BWC . . h . . . . . . . . . .
                             

*Data acquired over a 15-yr period (1994-2009; data missing in 2003) was used to determine annual 95% upper confidence limits (UCL) and 95% lower confidence limits (LCL) of the mean for each variable/reach/episode/stratum. Estimates of the 95% upper and lower confidence limit for the year of interest (e.g., 2010; a year outside the 15-yr period), along with the median, were compared to the 15-yr annual extremes to determine unusual conditions. Estimates where the median was higher than the highest annual 15-yr UCL or lower than the lowest annual 15-yr LCL were "low" or "high," respectively. Estimates where the LCL was higher than the highest annual 15-yr UCL or the UCL was lower than the lowest annual 15-yr LCL were "very low" or "very high", respectively.

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