Please Note: These documents were scanned in from the original paper copies using OCR. Although they have been proofed, there may be some typographical errors from this means of reproduction.

The following forms are in PDF file format. You will need the Adobe Acrobat Reader installed on your computer to view the documents. If you do not have the reader and would like to download it now, do so by selecting the Acrobat link in the footer below.

• Complete Set of Chapters (*.zip file)
• Complete Set of Chapters, Self-Extracting (*.exe file)

• Chapter 11: Project Submittals (*.pdf file)
• Chapter 12: Iowa Standards for Sewer Systems (*.pdf file)
• Chapter 13: Wastewater Pumping Stations and Force Mains (*.pdf file)
• Chapter 14: Wastewater Treatment Works (*.pdf file)
• Chapter 15: Screening and Grit Removal (*.pdf file)
• Chapter 16: Settling (*.pdf file)
• Chapter 17: Sludge Handling and Disposal (*.pdf file)
• Chapter 18a: Fixed Film Media Treatment (*.pdf file)
• Chapter 18b: Activated Sludge Biological Treatment (*.pdf file)
• Chapter 18c: Wastewater Treatment Ponds (Lagoons) (*.pdf file)
• Chapter 19: Supplemental Treatment Processes (*.pdf file)
• Chapter 20: Disinfection (*.pdf file)
• Chapter 21: Land Application of Wastewater (*.pdf file)

The Iowa Wastewater Facilities Design Standards were adopted in the late 1970's and early 1980's. The Iowa DNR has initiated a review of selected Chapters and revisions have been proposed. Please continue to the design standards update webpage.