Iowa River IA 02-IOW-623
from confluence with Long Cr. (S1 T74N R4W Louisa Co.) to confluence with Cedar R in S20 T75 R4W Louisa Co.
This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.
Assessment Cycle
1996
Result Period
1992 - 1994
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 02-IOW-0010_3
Overall Use Support
Not supporting
Aquatic Life Use Support
Threatened
Fish Consumption
Not assessed
Primary Contact Recreation
Not supporting
Documentation
Assessment Comments
Assessment is based on results of IDNR ambient monthly monitoring at Columbus Junction.
Basis for Assessment
5 of 10 non flow-affected samples had levels of fecal coliforms > water quality criterion; geometric mean of these values = 238; thus, assess support of Class A uses as NS. No other violations during the reporting period in the 24 samples from the monthly monitoring station at Columbus Junction.
Monitoring and Methods
Assessment Key Dates
Methods
| 420 | Water column surveys (e.g. fecal coliform) |
| 230 | Fixed station physical/chemical (conventional plus toxic pollutants) |
Monitoring Levels
| Biological | 0 |
| Habitat | 0 |
| Physical Chemistry | 3 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |