East Fork Des Moines River IA 04-EDM-972

from outfall of the Algona wastewater treatment plant (WWTP) to confluence with Buffalo Cr. in S20 T97N R28W Kossuth Co.

Open Data Collection Period Modal

For purposes of developing stream/river water quality assessments for integrated reporting, three years of water quality data are typically used for both conventional pollutant parameters (e.g., indicator bacteria) and the less frequently monitored toxic parameters (e.g., toxic metals). Since the 2004 IR cycle, DNR has used a three-year data gathering period for streams, rivers, and beaches. For most assessments, the use of three years of data increases the number of samples upon which the decision on use support is based and helps address the problem of weather-related year-to-year fluctuations in water quality.

Due to the lower sampling frequency in Iowa’s ambient lake, biological, fish kill, and fish tissue monitoring programs, five years of data are used for developing IR assessments and for identifying Section 303(d) listings.

Data Type	Data Timeframe
Beach Sampling Data	CY 2016 - 2018
Stream/River Water Quality Data	CY 2016 - 2018
Lake Water Quality Data	CY 2014 - 2018
Biological Sampling Data	CY 2014 - 2018*
Fish Kill Data	CY 2014 - 2018
Fish Tissue Sampling Data	CY 2014 - 2018
Continuous Dissolved Oxygen Sampling Data	CY 2014 - 2018
*Biological sites sampled in both 2013 and 2017 were also assessed.

Open Segment Map
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Cycle: 2020
Release Status: Final
Overall IR: 2 - Some of the designated uses are met but there is insufficient data to determine if remaining designated uses are met.
Trend: Unknown
Created: 6/4/2020 9:16:14 AM
Updated: 10/16/2020 11:31:16 AM

Use Support

Class A1

Recreation - Primary contact

Not Assessed

Class BWW1

Aquatic Life - Warm Water Type 1

Not Assessed

Class HH

Human Health -

Fully Supported

General Use

General Use water -

Not Assessed

Impairment Delistings

No delistings for this assessment cycle.

Documentation

Assessment Summary

The Class HH use remains assessed as "fully supported" based on fish tissue sampling data. All other designated uses were "not assessed".

Assessment Explanation

Data Sources:

Data Source	Data Type	Data Age	Site ID	Site Name	Site Location
Iowa DNR	FT	See Below	118	East Fork Des Moines River	at Algona

Presumptive Class A1 - No Data

Class BWW1 - No Data

Class HH - Fish Tissue Sampling:

Site ID	Date	Species Name	Biopart	# in sample	Hg result	Hg violation?	Assessment Type	Support Level
118	8/16/2016	northern pike	plug	3	0.120	No	Monitored	Full

Monitoring and Methods

Assessment Key Dates

8/16/2016

Fish Tissue Monitoring

Methods

260

Fish tissue analysis