Environmental Rules in Iowa City, IA (2026)
4 verified environmental rules for Iowa City, Iowa, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Iowa City runs every developed parcel through a citywide stormwater utility. Owners pay a monthly charge based on an equivalent residential unit (ERU) of 3,129 square feet of impervious area: single-family lots pay 100% of the ERU rate, multi-family pays 50% per unit, and nonresidential land pays a base ERU rate plus a per-square-foot add-on.
Iowa City Stormwater Utility Charges
Some RestrictionsIowa City Code § 16-3G-10(E), (F)
E. Establishment Of Equivalent Residential Unit (ERU) Rate And Storm Water Utility Charge: 1. For purposes of this article, an ERU shall be equivalent to three thousand one hundred twenty nine (3,129) square feet of impervious area... F. ... Determination Of Stormwater Utility Charge: 1. The stormwater utility charge for single-family residential properties shall be one hundred percent (100%) o...
Erosion Control
Iowa City requires a construction site runoff (CSR) permit, on top of any state NPDES permit, for earth-disturbing work of an acre or more. City Code section 17-8-15 mandates an approved SWPPP, at least one unannounced inspection, and 24-hour reporting of site condition changes.
Iowa City Construction Site Erosion Control Permit
Significant RestrictionsIowa City Code § 17-8-15(B)(1)
All persons required by law or administrative rule to obtain an NPDES general permit #2 from the IDNR, and persons who will be conducting any earth disturbing activity on a site less than one acre in size if the earth disturbing activities are part of a larger common plan of development that would disturb one acre or more, are required to obtain a CSR permit. "Earth disturbing activity" means a...
Flood Zones
Iowa City requires a floodplain development permit from the building official before any development begins on land in a mapped flood hazard area, per City Code section 14-5J-6. New or substantially improved residential structures must have their lowest floor elevated at least one foot above the base flood elevation, and violations are enforced as municipal infractions.
Iowa City Floodplain Development Permit
Significant RestrictionsIowa City Code § 14-5J-6
A. Permit Required: ... A floodplain development permit, issued by the building official, must be obtained prior to initiation of any development on a parcel of land within a flood hazard area according to the applicable review and approval procedures contained in Chapter 8, Article B, "Administrative Approval Procedures", of this title. Issuance of a floodplain development permit does not reli...
Flood Elevation Requirements
Iowa City requires one foot of freeboard above the flood hazard elevation for new and substantially improved buildings in flood hazard areas. The lowest floor, including basement, must sit at least a foot above base flood elevation or be floodproofed to that level, under City Code section 14-5J-7.
Iowa City Flood Elevation and Freeboard Rule
Some RestrictionsIowa City Code § 14-5J-7
All new or substantially improved residential structures must have the lowest floor, including basement, elevated a minimum of one foot (1') above the flood hazard elevation. Construction shall be upon compacted fill which shall, at all points, be no lower than one foot (1') above the flood hazard elevation and extend at such elevation at least eighteen feet (18') beyond the limits of any struc...
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