City of Boulder/USGS Water Quality Monitoring
Water Quality Index for March, 2002 at
Boulder Creek at Eben G. Fine Park

Grade B For March, 2002 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 88.28. 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 0.00 99.00 0.17 16.83
Fecal Coliform #/100 mL Data Unavailable
pH pH Data Unavailable
Total Phosphate mg PO4/L Data Unavailable
Nitrates mg NO3/L Data Unavailable
Turbidity NTU Data Unavailable
Total Solids mg/l 0.00 100.00 0.07 7.00
Parameter Unit Parameter Value Q-value Weight Factor Total
DO% % sat 0.00 99.00 0.17 16.83
Fecal Coliform #/100 mL 20.00 61.54 0.16 9.85
pH pH 7.40 93.61 0.11 10.30
Total Phosphate mg PO4/L 0.02 98.23 0.10 9.82
Nitrates mg NO3/L 0.10 97.90 0.10 9.79
Turbidity NTU 1.02 94.92 0.08 7.59
Total Solids mg/l 127.00 79.52 0.07 5.57
Totals (factors, total) 0.79 69.74
Adjusted WQI 88.28

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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