Changes in Water Quality Through the Denver Metropolitan Area Changes in Water Quality Through the Denver Metropolitan Area Changes in Water Quality Through the Denver Metropolitan Area Changes in Water Quality Through the Denver Metropolitan Area Changes in Water Quality Through the Denver Metropolitan Area
Water quality variable
Estimated change per km (regression coefficient)
Standard error of the estimate
t
p-value
BOD 0.049 0.007 7.35 0.000*
Nitrate-N -0.022 0.010 -2.18 0.029*
Orthophosphate 0.023 0.008 2.95 0.003*
Ammonia-N 0.005 0.002 2.09 0.037*
DO -0.035 0.008 -4.60 0.000*
pH -0.003 0.002 -1.41 0.158
Temperature 0.077 0.010 7.46 0.000*