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

Grade B For September, 2006 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 73.07. 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 96.10 97.54 0.17 16.58
Fecal Coliform #/100 mL 5400.00 10.18 0.16 1.63
pH pH 6.78 80.33 0.11 8.84
Total Phosphate mg PO4/L 0.05 97.26 0.10 9.73
Nitrates mg NO3/L Data Unavailable
Turbidity NTU 1.01 94.92 0.08 7.59
Total Solids mg/l 55.00 86.45 0.07 6.05
Totals (factors, total) 0.69 50.42
Adjusted WQI 73.07

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 August at this station

WQI for October at this station

Return to WQI map for September


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Last Page Update - Thursday March 01, 2007