1. E. Coli Chatfield to Denver 2000 - 2006
A brief description of e. coli data collected by SPCURE from Chatfield to Evans (Denver).

2. Log Scale 100 = 1, 101 = 10, 102 = 100, 103 = 1000, 104 = 10,000.
Black dashed line indicates proposed limit of 126 colonies of e.coli per 100 ml sample.
Blue – Chatfield. Green – Mineral. Orange – Dartmouth, Red – Evans.
Chatfield – Low but two values at or above 126.
Mineral – Higher values; a number of points just below 126, 3 at or above.
Evans and Dartmouth – essentially same values, many (>50%) excursions above and at 126.
Linear fits indicate average, little change in 6 years except maybe Mineral (but lots of variability).

3. Seasonality? Yes but not very pronounced and lots of variability.
Distance Weighted Least Squares model.

4. E. Coli Front Range CO & WY 2002 - 2003
USGS EUSE Study

5. USGS Study. E. coli not addressed in study but data was avaialble.

6. General area of interest. Watersheds selected in Front Range Area.

7. Watersheds defined. Color indicates degree of urbanization.

8. There is an apparent seasonal effect
There is an apparent seasonal effect. Similar to what was observed in lower segment 14. Red dotted line 126.

9. UII is Urban Index, 0 is lowest level of urbanization, 100 greatest (derivation discussed in much detail in report).
No relationship between UII and e. Coli numbers!