| Name | Steeles Branch (2) @ Highway 3 |
| Code | STE-02 |
| County | Delaware |
| Latitude | 42.6307831 |
| Longitude | -91.3656387 |
| Notes | Part of Delaware SWCD project |
| Sampled by | Delaware County Soil and Water Conservation District |
GREEN = Better than average water quality compared to other sites in the watershed
RED = Worse than average water quality compared to other sites in the watershed
GRAY = The average value from all sites in the watershed. Useful for comparison.
| P mg/L | N mg/L | E. Coli MPN/100mL | Total Suspended Solids mg/L | |
|---|---|---|---|---|
| All Years | 0.15 (0.21) | 11.6 (6.7) | 1352 (372) | 17 (29) |
| 2012 Mean | 0.15 (0.17) | 11.6 (4.8) | 1352 (374) | 17 (16) |
*All averages are arithmetic means, except for E. Coli and/or Fecal Coliform, which are calculated as geometric means. For purposes of calculating a mean, values that exceed the measurement limit (e.g., <0.05, 60+, <33) are assumed to be 20% greater or less than their limit (e.g., 0.04, 72, 26.4).
For 80.0% of the data records, Nitrate+Nitrite exceeded 10 mg/L. 10 mg/L represents the U.S. Public Health Service recommended limit of 10 mg/L NO3-N (nitrate-nitrogen) in drinking water.
For 80.0% of the data records, E. coli bacteria exceeded 235 CFU/100 ml. 235 CFU/100 ml represents Iowa's single sample maximum water quality standard for primary contact recreational use (Class A1), secondary contact recreational use (Class A2), and children's recreational use (A3).
| Sample Date | Time | by | P mg/L | N mg/L | E. Coli MPN/100mL | Total Suspended Solids mg/L |
|---|---|---|---|---|---|---|
| 12/05/12 | 06:00 | 0.06 | 12.0 | 160 | 1 | |
| 10/15/12 | 05:00 | 0.46 | 11.0 | 2100 | 56 | |
| 09/12/12 | 16:15 | 0.08 | 10.0 | 500 | 4 | |
| 07/31/12 | 16:30 | 0.08 | 11.0 | 3900 | ||
| 05/31/12 | 20:50 | 0.09 | 14.0 | 6900 | 8 |