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

Grade B For January, 2005 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 84.40. 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 111.20 96.24 0.17 16.36
Fecal Coliform #/100 mL 20.00 61.54 0.16 9.85
pH pH 8.02 86.56 0.11 9.52
Total Phosphate mg PO4/L 0.05 97.26 0.10 9.73
Nitrates mg NO3/L Data Unavailable
Turbidity NTU 3.10 89.51 0.08 7.16
Total Solids mg/l 120.00 80.32 0.07 5.62
Totals (factors, total) 0.69 58.24
Adjusted WQI 84.40

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

Return to WQI map for January


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Last Page Update - Saturday December 24, 2005