As concerns in water quality are addressed across the state, failing onsite wastewater systems are being evaluated regarding their effect on our water quality. We are looking for better methods to evaluate and design onsite wastewater systems.

The use of this manual is not required by the State of Iowa, County, or the other organizations listed below. This manual is not a State Code. In general this manual follows the State Code, however many parts go beyond code requirements in what the work group thought was the best practice for onsite systems today.

The use of a product name is not an endorsement of that product, and is used for example purposes only.

The following organizations worked together to develop a design manual and training program for onsite wastewater systems for County Sanitarians, Contractors, and System Designers throughout Iowa:

• USDA Rural Development, (USDA RD)
• Iowa Department of Natural Resources, (IDNR)
• Iowa Environmental Health Association, (IEHA)
• Natural Resources Conservation Service, (NRCS)
• ISU Agronomy Department
• Iowa Rural Water Association, (IRWA)
• Soil Classifiers Association of Iowa
• Iowa Onsite Wastewater Association (IOWWA)
• Minnesota Extension Service
• University of Wisconsin
• EPA
• National Small Flows Clearinghouse (NSFC)

We would like to thank USDA Rural Development and Jim Carroll for all of the time that was dedicated in the preparation of the manual.

This manual was prepared with the help of the following people: Jim Carroll, Brent Parker, Steve Hopkins, Jim Anderson, Dale Ceolla, Dave Gustafson, Louis Boeckman, Judy Krieg, Ken Sharp, H.B. Calvert, Tom Reichard, Larry Gittins, Sue Irving, Ellen Long, Mike Sucik, Tom Fenton, James Converse and Hillary Maurer.

Section A:	Water Use	(*.pdf file, 700K)
Section B:	Soils and Site Evaluations	(*.pdf file, 1,601K)
Section C:	Sewage Tanks	(*.pdf file, 274K)
Section D:	Soil Absorption Systems	(*.pdf file, 4,877K)
Section E:	Pressure Distribution and Pumping Systems	(*.pdf file, 3,376K)
Section F:	Alternative Systems	(*.pdf file, 3,240K)
Section G:	Inspection and Evaluation	(*.pdf file, 320K)
Section H:	Safety	(*.pdf file, 114K)
Section I:	Iowa Administrative Code 567, Chapter 69	(*.pdf file, 360K)
	or download the Complete Manual (large file)	(*.pdf file, 14,934K)