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Boulder Creek at 107th St |
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Boulder Creek at 107th St |
For June, 2006 the WQI rating at Boulder Creek at 107th St (BC-107) was Medium (C) due to a WQI value of 66.35.
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 | 124.16 | 88.45 | 0.17 | 15.04 |
| Fecal Coliform | #/100 mL | 790.00 | 20.83 | 0.16 | 3.33 |
| pH | pH | 8.14 | 82.62 | 0.11 | 9.09 |
| Total Phosphate | mg PO4/L | 0.42 | 65.97 | 0.10 | 6.60 |
| Nitrates | mg NO3/L | Data Unavailable | |||
| Turbidity | NTU | 6.06 | 82.79 | 0.08 | 6.62 |
| Total Solids | mg/l | 181.00 | 72.90 | 0.07 | 5.10 |
| Totals (factors, total) | 0.69 | 45.78 | |||
| Adjusted WQI | 66.35 | ||||
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 (20.20 ° C) = | 8.99 mg/L |
| Saturation DO corrected for station elevation (5010.00 ft. a.s.l) = | 7.41 mg/L |
| Actual dissolved oxygen measured at station = | 9.20 mg/L |
| Measured dissolved oxygen as percent of saturation = | 124.16 % |