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

Grade B For May, 2002 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 83.01. 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 106.40 98.19 0.17 16.69
Fecal Coliform #/100 mL 130.00 38.64 0.16 6.18
pH pH 7.85 90.16 0.11 9.92
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 2.32 91.31 0.08 7.30
Total Solids mg/l 88.00 83.87 0.07 5.87
Totals (factors, total) 0.79 65.58
Adjusted WQI 83.01

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 April at this station

WQI for June at this station

Return to WQI map for May


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Last Page Update - Saturday December 24, 2005