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Boulder Creek at 75th St |
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Boulder Creek at 75th St |
For October, 2002 the WQI rating at Boulder Creek at 75th St (BC-75) was Medium (C) due to a WQI value of 62.70.
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 | 92.50 | 95.43 | 0.17 | 16.22 |
| Fecal Coliform | #/100 mL | 130.00 | 38.64 | 0.16 | 6.18 |
| pH | pH | 7.19 | 91.15 | 0.11 | 10.03 |
| Total Phosphate | mg PO4/L | Data Unavailable | |||
| Nitrates | mg NO3/L | 10.70 | 10.52 | 0.10 | 1.05 |
| Turbidity | NTU | 8.33 | 78.03 | 0.08 | 6.24 |
| Total Solids | mg/l | 354.00 | 50.48 | 0.07 | 3.53 |
| Totals (factors, total) | 0.69 | 43.26 | |||
| Adjusted WQI | 62.70 | ||||
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.