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Boulder Creek above Dry Creek |
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Boulder Creek above Dry Creek |
For July, 2006 the WQI rating at Boulder Creek above Dry Creek (BC-aDC) was Medium (C) due to a WQI value of 55.00.
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 | 154.39 | 50.00 | 0.17 | 8.50 |
| Fecal Coliform | #/100 mL | 230.00 | 32.12 | 0.16 | 5.14 |
| pH | pH | 7.95 | 88.20 | 0.11 | 9.70 |
| Total Phosphate | mg PO4/L | 1.25 | 31.94 | 0.10 | 3.19 |
| Nitrates | mg NO3/L | Data Unavailable | |||
| Turbidity | NTU | 8.07 | 78.03 | 0.08 | 6.24 |
| Total Solids | mg/l | 174.00 | 73.87 | 0.07 | 5.17 |
| Totals (factors, total) | 0.69 | 37.95 | |||
| Adjusted WQI | 55.00 | ||||
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 |
|
| Saturation DO at sea level and measured temperature (23.90 ° C) = | 8.35 mg/L |
| Saturation DO corrected for station elevation (5060.00 ft. a.s.l) = | 6.87 mg/L |
| Actual dissolved oxygen measured at station = | 10.61 mg/L |
| Measured dissolved oxygen as percent of saturation = | 154.39 % |