City of Boulder/USGS Water Quality Monitoring
Water Quality Index for November, 2006 at
Boulder Creek at Eben G. Fine Park

Grade B For November, 2006 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 83.75. The chart below details the WQI calulations at this site. See the detailed explanation of the WQI method for more information.


Parameter Unit Parameter Value Q-value Weight Factor Total
DO% % sat 95.10 96.89 0.17 16.47
Fecal Coliform #/100 mL 40.00 52.48 0.16 8.40
pH pH 7.08 89.02 0.11 9.79
Total Phosphate mg PO4/L 0.06 97.26 0.10 9.73
Nitrates mg NO3/L Data Unavailable
Turbidity NTU 2.06 92.13 0.08 7.37
Total Solids mg/l 46.00 86.13 0.07 6.03
Totals (factors, total) 0.69 57.78
Adjusted WQI 83.75

The WQI is computed by converting measured Water Quality Parameters to "Q-Values" using charts developed by the National Sanitation Foundation (NSF) water quality scientists. The Q-Values are then multiplied by a weighting factor based on the importance of that water quality parameter. These values are totaled and then divided by the sum of the weight factors.

WQI at Upstream Station: Boulder Creek at Orodell

WQI at Downstream Station: Boulder Creek at 61st St.

WQI for October at this station

WQI for December at this station

Return to WQI map for November


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Last Page Update - Thursday March 01, 2007