Iowa DNR
Iowa DNR
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Water Quality Assessments
Impaired Waters List

North Fork Catfish Creek IA 01-TRK-6486

from Hwy 20 bridge in Dubuque (S27 T89NR2E Dubuque Co.) to headwaters in NW1/4 S20 T89N R2E Dubuque Co.

Assessments
Cycle
IR Category
2026 Draft
5
2024
5
2022
5
2020
5
2018
5
2016
5
Legacy Assessments
Details
Type
River
Segment ID
6486
Segment Size
3.2 Miles
07060005
HUC12
  • 070600050102
Legacy ADBCode
IA 01-TRK-0127_0
Designated Uses
  • Class A1 P
  • Class BWW1 P
Segment Memos 1
Due to changes in Iowa’s surface water classification approved by U.S. EPA in 2008, this segment has presumptive Class A1 primary contact recreation and Class BWW1 warmwater aquatic life designated uses. According to Iowa Water Quality Standards, all perennial streams and intermittent streams with perennial pools that are not specifically listed in the Iowa surface water classification are designated as Class A1 and Class BWW1 waters.
7/6/2021
Map
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Water Monitoring Network
Fish Kills
Recreation and Water Quality
BioNet Biological Assessment Sites
AQuIA Monitoring Sites