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
1992
Result Period
1988 - 1990
Designations
Assessment Type
Monitored
Integrated Report
Category 0
Legacy ADBCode
IA 02-IOW-0010_3
Overall Use Support
Partial
Aquatic Life Use Support
Not assessed
Fish Consumption
Not assessed
Primary Contact Recreation
Partial
Documentation
Assessment Comments
Assessment is based on results of IDNR ambient monthly monitoring at Columbus Junction.
Basis for Assessment
Had 1 of 11 samples collected at approx average flows that had levels of FCB that exceeded the Class A WQC (=11% violation = PS). The chronic WQC for ammonia was exceeded in 18 of 36 samples, but the acute criterion was not exceeded.
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 |