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Boulder Creek at 61st St. |
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Boulder Creek at 61st St. |
For May, 2005 the WQI rating at Boulder Creek at 61st St. (BC-61) was Good (B) due to a WQI value of 77.99.
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 | 98.10 | 98.19 | 0.17 | 16.69 |
| Fecal Coliform | #/100 mL | 80.00 | 44.37 | 0.16 | 7.10 |
| pH | pH | 7.90 | 89.67 | 0.11 | 9.86 |
| Total Phosphate | mg PO4/L | 0.05 | 97.26 | 0.10 | 9.73 |
| Nitrates | mg NO3/L | Data Unavailable | |||
| Turbidity | NTU | 15.90 | 64.10 | 0.08 | 5.13 |
| Total Solids | mg/l | 158.00 | 75.81 | 0.07 | 5.31 |
| Totals (factors, total) | 0.69 | 53.81 | |||
| Adjusted WQI | 77.99 | ||||
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.