City of Boulder/USGS Water Quality Monitoring
Water Quality Index for March, 2007 at
Boulder Creek at Eben G. Fine Park

Grade B For March, 2007 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 79.37. 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 97.50 97.86 0.17 16.64
Fecal Coliform #/100 mL 70.00 45.96 0.16 7.35
pH pH 7.76 91.97 0.11 10.12
Total Phosphate mg PO4/L 0.05 97.26 0.10 9.73
Nitrates mg NO3/L Data Unavailable
Turbidity NTU 12.40 69.51 0.08 5.56
Total Solids mg/l 150.00 76.77 0.07 5.37
Totals (factors, total) 0.69 54.77
Adjusted WQI 79.37

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 February at this station

WQI for April at this station

Return to WQI map for March


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Last Page Update - Tuesday June 12, 2007