 |
Boulder Creek at 61st St. |
|
Boulder Creek at 61st St. |
For February, 2005 the WQI rating at Boulder Creek at 61st St. (BC-61) was Good (B) due to a WQI value of 75.13.
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 | 101.10 | 98.68 | 0.17 | 16.77 |
| Fecal Coliform | #/100 mL | 230.00 | 32.12 | 0.16 | 5.14 |
| pH | pH | 8.37 | 74.43 | 0.11 | 8.19 |
| Total Phosphate | mg PO4/L | 0.02 | 98.23 | 0.10 | 9.82 |
| Nitrates | mg NO3/L | Data Unavailable | |||
| Turbidity | NTU | 1.50 | 93.93 | 0.08 | 7.51 |
| Total Solids | mg/l | 259.00 | 62.90 | 0.07 | 4.40 |
| Totals (factors, total) | 0.69 | 51.84 | |||
| Adjusted WQI | 75.13 | ||||
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.