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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 rule making to renew General Permits 1, 2, and 3 for storm water and General Permit 4 for private sewage disposal systems. The proposed revisions to the general permits and the amendments to Chapter 60 update existing wording in the regulations, definitions, and standard conditions to match the administrative rules and federal regulations. The the Environmental Protection Commission approved the Notice of Intended Action for the proposed rule at their meeting on August 16, 2022.
A public hearing on the proposed rule and general permit renewals will be held via Zoom on September 28, 2022, at 2:00 pm. For more information on the hearing and on the proposed renewals, please see the NPDES Rules page.
On August 16, 2022, the Environmental Protection Commission adopted a final rule to renew five of Iowa’s general permits for wastewater discharges. General Permit Nos. 8 and 9 were renewed because the current versions will expire on June 30, 2023. General Permit Nos. 5, 6, and 7 were renewed at the same time in order to align the effective dates for all five general permits. The renewed permits will become effective on July 1, 2023.
For more information on these 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.