 |
Boulder Creek above Dry Creek |
|
Boulder Creek above Dry Creek |
For September, 2002 the WQI rating at Boulder Creek above Dry Creek (BC-aDC) was Medium (C) due to a WQI value of 56.46.
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 | 116.52 | 93.00 | 0.17 | 15.81 |
| Fecal Coliform | #/100 mL | 14000.00 | 6.04 | 0.16 | 0.97 |
| pH | pH | 7.10 | 90.00 | 0.11 | 9.90 |
| Total Phosphate | mg PO4/L | 0.71 | 47.42 | 0.10 | 4.74 |
| Nitrates | mg NO3/L | 4.30 | 37.70 | 0.10 | 3.77 |
| Turbidity | NTU | 18.00 | 61.48 | 0.08 | 4.92 |
| Total Solids | mg/l | 248.00 | 64.19 | 0.07 | 4.49 |
| Totals (factors, total) | 0.79 | 44.60 | |||
| Adjusted WQI | 56.46 | ||||
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 (19.00 ° C) = | 9.21 mg/L |
| Saturation DO corrected for station elevation (5060.00 ft. a.s.l) = | 7.58 mg/L |
| Actual dissolved oxygen measured at station = | 8.83 mg/L |
| Measured dissolved oxygen as percent of saturation = | 116.52 % |