West Nishnabotna River IA 05-NSH-1441
from confluence with Silver Cr. (S21 T71N R41W Mills Co.) to confluence Farm Cr. in S9 T73N R40W Mills Co.
Assessment Comments
Assessment is based on results of IDNR/UHL ambient monthly water quality monitoring near Malvern from 2002-04.
Basis for Assessment
SUMMARY: The Class B(WW) aquatic life uses are assessed (monitored) as "fully supported" based on results of ambient chemical/physical water quality monitoring from 2002 through 2004. Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring in this river segment. This assessment is based on results of IDNR/UHL monthly ambient water quality monitoring conducted during the 2002-2004 assessment period east of Malvern (STORET station 10650001 (formerly station 822310)).
EXPLANATION: Monitoring at the IDNR/UHL station near Malvern showed no violations of Class B(WW) water quality criteria during the 2002-2004 assessment period for dissolved oxygen, pH, and ammonia-nitrogen in the 36 samples analyzed. In addition, levels of pesticides in the seven samples analyzed, and levels of toxic metals in the ten samples analyzed, were all below the respective Class B(WW) criteria. These results suggest "full support" of the Class B(WW) aquatic life uses.
Fish consumption uses remain "not assessed" due to the lack of fish tissue monitoring in this river segment.
Assessment Key Dates
| 12/6/2004 | Fixed Monitoring End Date |
| 1/7/2002 | Fixed Monitoring Start Date |
Methods
| 230 | Fixed station physical/chemical (conventional plus toxic pollutants) |
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 3 |
| Toxic | 3 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |