NPDES Databases

This page contains information about the online databases used by the NPDES Section of the Iowa DNR. Please expand the sections below for more information on each database.

1 Individual NPDES and Operation Permits - Wastewater Permit Information Exchange

To proceed to WWPIE, please use the following link: Wastewater Permit Information Exchange (WWPIE)

WWPIE has two main functions:

  • providing public access to pdf versions of individual NPDES and operation permits in Iowa
  • allowing interested persons to register, save searches and receive draft and final permit notifications

In WWPIE, you may search for active individual NPDES and operation permits by proceeding to the search page. The facility pages in WWPIE provide basic information on permits, permit delay reasons (if applicable), and links to the permit documents. General Permits Nos. 1 - 9 are not included in WWPIE and facilities covered by these permits will not appear in the search. Only final and draft individual NPDES permits are included in WWPIE. Closed and revoked permits are not searchable.

Persons interested in NPDES permitting in Iowa can register, save searches, and receive email notifications on draft and final permits in WWPIE. Registered users can opt to receive email notifications when individual permits are drafted or finalized in a specific search area, so users can be notified of new draft permits or can track permit issuance. Please use the WWPIE Registration and Notification Instructions or view the FAQ document in WWPIE for more information on registering, saving searches, and receiving notifications in WWPIE.

For questions on WWPIE, please contact

2 General Permits 5, 8, and 9

The General Permits 5, 8 and 9 Database allows the public to search for and view information on authorizations for General Permit #5 (Mining and Quarries), General Permit #8 (Hydrostatic Testing, Ballasting, and Water Lines) or General Permit #9 (Dewatering and Residential Geothermal). New applicants and existing permittees can also register for an account and submit electronic Notices of Intent (eNOI) for coverage under General Permits #5, #8, or #9.

To view the GP 589 Database, please use the following link: General Permits 5, 8, & 9 Database


General Permit #5:

In the GP 589 Database, permittees may submit eNOIs, submit annual monitoring reports, and pay fees for General Permit #5.

For basic instructions on how to search without an account, create an account, and manage GP5 facilities, see the GP589DB - GP5 Quick Start User Manual.

For complete instructions on how to use the General Permit 5 portion of the GP589 Database, see the GP589DB - GP5 External User Manual.

If you have questions or need assistance with the database functions for General Permit 5, contact Tim Grotheer at 515-725-8414 or


General Permits 8 & 9:

Most permittees will not need to submit an eNOI for coverage under General Permit 8 or 9.  To determine if you need to submit an eNOI, please refer to the screening questions.

For more information on how to register, sign and/or submit eNOIs for GP 8 or 9, see the GP589DB - GP8 & 9 User Manual.

If you have questions regarding eNOI submittal for General Permits 8 and 9, contact Wendy Hieb at 515-808-3039 or

3 General Permits - Online Storm Water Database

If you wish to search for discharges authorized under the storm water General Permits, #1 for industrial activity, #2 for construction activities, and #3 for asphalt plants, concrete batch plants, rock crushing plants and construction sand and gravel facilities, please go to the Online Storm Water Permit Database.

If you wish to apply for coverage under General Permit #1, #2, or #3 online, please go to the Online Storm Water General Permit Application webpage.

For questions on the Online Storm Water Database, please call 515-725-8417 or 515-204-9234, or email Joe Griffin at

4 Other Individual or General Permits

If you wish to obtain information on an individual permit not included in WWPIE (a pending permit for a new discharger or a closed, revoked, or expired permit), please contact a permit writer listed on the NPDES staff roster.

If you wish to see a list of the active individual permits in Iowa, please refer to the Current NPDES Permits webpage.

There is currently no listing of the discharges authorized under General Permits #4, #6, and #7 on the Iowa DNR website. For more information on these general permits, please see the NPDES General Permits webpage.