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The city of Aurora has drafted an update to the Storm Drainage Design and Technical Criteria (SDDTC) that became effective in January 2026. It is anticipated that updates will be made on an annual basis, or as otherwise needed.
This update captures feedback received from the development community and issues found by Aurora Water staff since the last revision as well as updates to our MS4 and I&M processes. We have clarified several sections and precesses, added example scenarios, consolidated tables, and overall improved searchability and organization.
The draft version of the manual can be found at the link below. A detailed list of changes is shown in Section 1.5.1 of the draft. While minor edits can be expected for the final version, we appreciate any and all feedback.
Changes are anticipated to become effective approximately Jan. 2, 2027.
If you would like to receive updates on future drafts and feedback opportunities, please click the "Stay Informed / Subscribe" button on this page.
The city of Aurora has drafted an update to the Storm Drainage Design and Technical Criteria (SDDTC) that became effective in January 2026. It is anticipated that updates will be made on an annual basis, or as otherwise needed.
This update captures feedback received from the development community and issues found by Aurora Water staff since the last revision as well as updates to our MS4 and I&M processes. We have clarified several sections and precesses, added example scenarios, consolidated tables, and overall improved searchability and organization.
The draft version of the manual can be found at the link below. A detailed list of changes is shown in Section 1.5.1 of the draft. While minor edits can be expected for the final version, we appreciate any and all feedback.
Changes are anticipated to become effective approximately Jan. 2, 2027.
