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North Boulder Creek at Boulder Falls |
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North Boulder Creek at Boulder Falls |
For June, 2006 the WQI rating at North Boulder Creek at Boulder Falls (NBC-FALLS) was Good (B) due to a WQI value of 79.60.
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%(*calculated) | % sat | 107.77 | 97.70 | 0.17 | 16.61 |
| Fecal Coliform | #/100 mL | 40.00 | 52.48 | 0.16 | 8.40 |
| pH | pH | 6.45 | 65.74 | 0.11 | 7.23 |
| Total Phosphate | mg PO4/L | 0.05 | 97.26 | 0.10 | 9.73 |
| Nitrates | mg NO3/L | Data Unavailable | |||
| Turbidity | NTU | 4.25 | 86.39 | 0.08 | 6.91 |
| Total Solids | mg/l | 53.00 | 86.45 | 0.07 | 6.05 |
| Totals (factors, total) | 0.69 | 54.93 | |||
| Adjusted WQI | 79.60 | ||||
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.
| Calculation of Dissolved Oxygen as Percentage of Saturation |
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| Saturation DO at sea level and measured temperature (10.10 ° C) = | 11.24 mg/L |
| Saturation DO corrected for station elevation (6880.00 ft. a.s.l) = | 8.54 mg/L |
| Actual dissolved oxygen measured at station = | 9.20 mg/L |
| Measured dissolved oxygen as percent of saturation = | 107.77 % |