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For more information on the storm water general permits (1, 2, and 3), refer to the Storm Water Permitting Requirements Information page.
For more information on General Permits 4, 5, 6, 7, 8, and 9, please follow the links above.
The NPDES Section is proposing a rule change that will renew five of Iowa’s general permits for wastewater discharges. General Permit Nos. 8 and 9 are proposed to be renewed because these permits will expire on June 30, 2023. General Permit Nos. 5, 6, and 7 are proposed to be renewed at the same time in order to align the effective dates for all five general permits.
A public hearing on the proposed rule will be held via Zoom on July 6, 2022, from 1:00 to 2:00 pm. For more information on the hearing and the proposed general permit renewals, please see the NPDES Rules page.
Refer to the Online Storm Water Database section of the NPDES Databases page for more information on the following:
Refer to the General Permits 5, 8, and 9 Database section of the NPDES Databases page for more information on the following:
General NPDES Permits allow the Iowa DNR to allocate resources in an efficient manner to provide more timely permit coverage. For example, many facilities that have common elements may be covered under a general permit without expending the time and money necessary to issue individual permits to each facility. In addition, using a general permit ensures consistency of permit conditions for similar facilities.
A General NPDES Permit covers multiple facilities within a specific category. General permits can be cost-effective, as a large number of facilities can be covered under a single permit. A general permit may be written to cover categories of point sources having common elements.
The process for developing and issuing General NPDES Permits is similar to the process for individual permits. However, there are differences in the order of events. The Iowa DNR first identifies the need for a general permit by collecting data demonstrating that a group of dischargers has similarities that warrant a general permit. In deciding whether to develop a general permit, the Iowa DNR will consider the following:
The remaining steps of the permit process are similar to those for individual permits. The Iowa DNR develops the draft general permit and rationale, issues a public notice, addresses public comments, and issues the final permit. However, General NPDES Permits in Iowa must be adopted by rule, so the public notice, response to comments, and issuance of the general permit are all part of the rulemaking process. For more information on the rulemaking process, see the NPDES Rules page.
After a general permit has been issued, facilities may either submit a paper or electronic Notice of Intent (NOI) to the Iowa DNR for coverage under the permit (General Permits No. 1, 2, 3, 4, 5, 8 and 9), or a facility may automatically be covered by the general permit (General Permits No. 6, 7, 8 and 9). Upon receipt of an NOI, the Iowa DNR may either request additional information from the facility, notify the facility that it is covered by the general permit, or require the facility to apply for an individual permit.