City of Boulder/USGS Water Quality Monitoring
Water Quality Index for June, 2006 at
Boulder Creek at Eben G. Fine Park

Grade B For June, 2006 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 78.07. 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 102.60 98.84 0.17 16.80
Fecal Coliform #/100 mL 130.00 38.64 0.16 6.18
pH pH 6.64 74.43 0.11 8.19
Total Phosphate mg PO4/L 0.03 98.23 0.10 9.82
Nitrates mg NO3/L Data Unavailable
Turbidity NTU 4.52 85.57 0.08 6.85
Total Solids mg/l 46.00 86.13 0.07 6.03
Totals (factors, total) 0.69 53.87
Adjusted WQI 78.07

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 - Thursday March 01, 2007