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Overland Park, KS Environmental Rules: Stormwater Management (2026)

Heavy Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

MS4 permit
M-MO28-SU01, NPDES KSR410026
Permit term
January 2024 to December 2026
Treatment threshold
One acre of land disturbance
Redevelopment trigger
5,000 square feet new impervious
Design manual
MARC and APWA BMP manual

Summary

Overland Park holds its own NPDES MS4 permit from KDHE and runs two ordinances: 16.210 requires treatment of runoff from new development and redevelopment, and 15.10.400 requires detention where downstream homes or streets flood.

The purpose of this Act is to minimize and prevent the discharge of pollutants from developed land into the surface waters of the City by establishing reasonable requirements for the treatment of stormwater runoff from new development and redevelopment activities.

Source: City of Overland Park Municipal CodeView official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: latest section effective 1901-01-01).

Full Breakdown

Chapter 16.210 applies to development disturbing an acre or more, exempting single-lot residential projects, agricultural uses, utility construction and impervious increases under 5,000 square feet. Treatment facility design follows the MARC and APWA Manual of Best Management Practices for Stormwater Quality. Detention under 15.10.400 attaches when a project raises peak discharge and downstream homes or habitable buildings flood in the 1 percent storm, with an escrow alternative for downstream improvements. The city's Kansas permit is M-MO28-SU01, NPDES number KSR410026, running January 2024 through December 2026. Indian Creek, Tomahawk Creek, Coffee Creek and Wolf Creek carry TMDL listings.

Violations & Fines

The city issues stop work orders, refuses inspections and abates at the owner's expense. Unpaid costs are certified to the County Clerk as a special assessment against the parcel.

Frequently Asked Questions

Who administers stormwater in Overland Park?
The city. Planning and Development Services runs treatment and erosion permitting, Public Works handles the system, and KDHE issues the MS4 permit. Johnson County cost-shares projects and does TMDL monitoring.
Does a single house need stormwater treatment?
No. Single lot residential developments not part of a larger common plan are exempt from Chapter 16.210, as are disturbances under one acre and agricultural uses.
Who maintains a detention or treatment pond?
The private owner. Stormwater treatment facilities serving a development stay private, covered by a recorded maintenance agreement, and the city accepts no public drainage easements over them.

Sources & Official References

Other rules in Overland Park

Fence Regulations: Height LimitsSome RestrictionsCoastal DevelopmentHeavy RestrictionsErosion ControlSome RestrictionsFlood ZonesSignificant RestrictionsFlood Elevation RequirementsSome RestrictionsParking Rules: Loading ZonesSome RestrictionsParking Rules: Driveway RulesSome RestrictionsFence Regulations: Fence Permit RequirementsSome RestrictionsAnimal Ordinances: Veterinary Clinic ZoningSignificant RestrictionsAnimal Ordinances: MicrochippingSome Restrictions

All Overland Park rules

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Stormwater Management in Nearby Cities

How other cities in Johnson County handle stormwater management.

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