BASIN: Water Quality Index for January, 2002 at Boulder Creek at Eben G. Fine Park


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

Grade B For January, 2002 the WQI rating at Boulder Creek at Eben G. Fine Park (BC-CAN) was Good (B) due to a WQI value of 88.60. 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	98.80	98.35	0.17	16.72
Fecal Coliform	#/100 mL	20.00	61.54	0.16	9.85
pH	pH	Data Unavailable
Total Phosphate	mg PO4/L	Data Unavailable
Nitrates	mg NO3/L	Data Unavailable
Turbidity	NTU	0.22	97.70	0.08	7.82
Total Solids	mg/l	52.00	86.45	0.07	6.05

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	98.80	98.35	0.17	16.72
Fecal Coliform	#/100 mL	20.00	61.54	0.16	9.85
pH	pH	7.83	90.82	0.11	9.99
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	0.24	97.70	0.08	7.82
Total Solids	mg/l	66.00	85.81	0.07	6.01
Totals (factors, total)				0.79	69.99
Adjusted WQI					88.60

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