Big Sioux River IA 06-BSR-1523
from confluence with Indian Cr. (S9 T93N R48W Plymouth Co.) to confluence with Rock R. in S1 T95N R48W Sioux Co.
Assessment Comments
Assessment is based on results of water quality monitoring conducted by South Dakota DENR near Alcester, SD, Richland, SD, and Akron, IA.
Basis for Assessment
Assessed support of the Class A primary body contact recreation uses as PS due to relatively high levels of fecal coliform bacteria (4 of 12 samples collected in this reach during the 1994-1995 recreational seasons exceeded the Class A WQ criterion = 33% violations). No violations of Class B aquatic life WQ criteria. Levels of total dissolved solids tend to be high and tend to exceed general class criterion of 750 mg/l. No known source (other than natural sources) for these high levels of TDS.
Assessment Key Dates
Methods
| 230 | Fixed station physical/chemical (conventional plus toxic pollutants) |
| 420 | Water column surveys (e.g. fecal coliform) |
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 0 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |