City of Boulder/USGS Water Quality Monitoring
Water Quality Index for February, 2005 at
Boulder Creek at Eben G. Fine Park

Grade B For February, 2005 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 78.18. 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 127.50 86.34 0.17 14.68
Fecal Coliform #/100 mL 50.00 49.77 0.16 7.96
pH pH 8.22 80.66 0.11 8.87
Total Phosphate mg PO4/L 0.02 98.23 0.10 9.82
Nitrates mg NO3/L Data Unavailable
Turbidity NTU 2.40 91.31 0.08 7.30
Total Solids mg/l 158.00 75.81 0.07 5.31
Totals (factors, total) 0.69 53.95
Adjusted WQI 78.18

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 January at this station

WQI for March at this station

Return to WQI map for February


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Last Page Update - Saturday December 24, 2005