The files listed below contain information on facilities that hold NPDES permits, or those that are authorized to discharge wastewater to surface waters in Iowa. The permit listing file is an EXCEL spreadsheet that contains the name, address, phone number and other commonly requested information on each permitted discharger. This file can be downloaded and manipulated to provide customized lists of information.

Permit Listings: (*.xls file)
List of NPDES Permittees in Iowa (Last updated October 9, 2009)

Individual draft and final NPDES permits, such as city or industry wastewater permits, can be searched and viewed on the Wastewater Permit Information Exchange system (WWPIE). Follow the instructions on the WWPIE home page or in the WWPIE User Manual(PDF) to search and view permits. General Permits Nos. 1, 2, 3, 4, and 5 are not included in WWPIE and facilities covered by these permits will not appear in the search. Only final and draft NPDES permits are included in WWPIE. Expired, closed, or revoked permits are not searchable.