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Boulder Creek at 61st St. |
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Boulder Creek at 61st St. |
For March, 2005 the WQI rating at Boulder Creek at 61st St. (BC-61) was Good (B) due to a WQI value of 71.50.
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 | 117.40 | 92.67 | 0.17 | 15.75 |
| Fecal Coliform | #/100 mL | 130.00 | 38.64 | 0.16 | 6.18 |
| pH | pH | 8.42 | 71.80 | 0.11 | 7.90 |
| Total Phosphate | mg PO4/L | 0.04 | 97.26 | 0.10 | 9.73 |
| Nitrates | mg NO3/L | Data Unavailable | |||
| Turbidity | NTU | 9.10 | 76.07 | 0.08 | 6.09 |
| Total Solids | mg/l | 337.00 | 52.74 | 0.07 | 3.69 |
| Totals (factors, total) | 0.69 | 49.34 | |||
| Adjusted WQI | 71.50 | ||||
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.