Detroit, MI Environmental Rules: Stormwater Management (2026)

(a)Subject to Section 48-2-103 of this Code, this division applies to all construction activities that are subject to the drainage charge and that involve the replacement or creation of 21,780 square feet or more of impervious surface.(b)This division shall also apply to any construction activity that is not subject to Subsection (a) of this section, but may create a condition that would result in runoff that would:(1)Exceed the safe capacity of the receiving public sewer or body of water as determined by the Water and Sewerage Department;(2)Cause undue channel erosion;(3)Increase water pollution by scouring or transport of particulate matter;(4)Endanger property; or(5)Endanger public safety.(c)Notwithstanding Subsection (a) or Subsection (b) of this section, the discharge from a regulated construction activity may be determined by the Water and Sewerage Department to have previously been authorized and to have incorporated stormwater control measures that are sufficient to satisfy the performance standards in this division. In such cases, the applicant may request a review by the Department for a determination of whether additional stormwater management is required for the development site. (Code 1984, § 56-3-101; Ord. No. 39-18, § 1(56-3-101), eff. 1-17-2019; Ord. No. 2020-43, § 1, eff. 12-16-2020)