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

Grade B For June, 2005 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 83.87. 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 101.30 98.68 0.17 16.77
Fecal Coliform #/100 mL 20.00 61.54 0.16 9.85
pH pH 7.05 88.20 0.11 9.70
Total Phosphate mg PO4/L 0.20 88.55 0.10 8.85
Nitrates mg NO3/L Data Unavailable
Turbidity NTU 5.66 83.44 0.08 6.68
Total Solids mg/l 63.00 85.97 0.07 6.02
Totals (factors, total) 0.69 57.87
Adjusted WQI 83.87

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 May at this station

WQI for July at this station

Return to WQI map for June


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Last Page Update - Saturday December 24, 2005