Des Moines Storm Drain & Illicit Discharge Rules

Utilities and Infrastructure Iowa 3 Minutes Read · published February 10, 2026 Flag of Iowa

In Des Moines, Iowa, protecting storm drains and preventing illicit discharges is a city priority. This guide explains how the City of Des Moines regulates pollutants entering the stormwater system, how to report spills or illegal dumping, and practical steps residents and businesses must follow to stay compliant.

Report spills or illegal discharges to the city's stormwater contact as soon as possible.

What the rules cover

The city’s stormwater program focuses on preventing non-stormwater discharges to streets, storm drains, and creeks. Common regulated sources include oil, pet waste, paint, construction runoff, wash water, and commercial process water. The City of Des Moines Public Works - Stormwater Division administers local stormwater controls and illicit discharge response [1].

How to report an illicit discharge

If you see a spill, visible pollution, or someone dumping into a storm inlet, report it immediately using the city reporting options below. Provide location, description, and photos when possible; emergency releases should go to 911 first and then the stormwater team [2].

  • Call emergency services for immediate threats to life or safety.
  • Use the city stormwater report contact for non-emergencies.
  • Document location, time, and visible signs (sheen, color, odor).

Penalties & Enforcement

Enforcement is handled by the City of Des Moines Public Works with support from code enforcement and legal counsel. Specific monetary fines, daily penalties, or escalation ranges are not specified on the cited municipal pages; see the municipal code for formal enforcement language [3].

  • Fine amounts: not specified on the cited page.
  • Escalation (first/repeat/continuing offences): not specified on the cited page.
  • Non-monetary sanctions: the city may issue cleanup orders, require corrective actions, and pursue civil or criminal proceedings as authorized by municipal code; specific remedies are set in the ordinance text [3].
  • Enforcer and inspections: Public Works - Stormwater Division conducts investigations and inspections; complaints are triaged through the stormwater contact listed by the city [1].
  • Appeal or review: appeal routes and time limits are not specified on the cited pages; consult the municipal code or contact the department for procedural details [3].
If fines or appeal periods are needed for your case, request the ordinance section and enforcement record from the stormwater office.

Applications & Forms

The city does not publish a separate "illicit discharge permit" form for routine household activities; reporting and enforcement use complaint intake forms or departmental referrals. For construction-related stormwater permits, state NPDES permits may apply; local forms specific to illicit discharges are not listed on the cited city pages [1][3].

Common violations

  • Discharging motor oil, solvents, or automotive fluids into storm drains.
  • Improper wash water from car or equipment cleaning discharging to streets.
  • Construction site sediment runoff without controls.
  • Dumping yard waste, paint, or chemicals to inlets or curb gutters.

How-To

  1. Identify the source and immediate hazard; if life or health is threatened, call 911.
  2. Report the incident to the City of Des Moines stormwater contact with location and photos [2].
  3. Contain or prevent further spread if safe to do so (use absorbents for small spills, block flow to storm inlets).
  4. Follow directions from city inspectors; preserve evidence and provide written statements if requested.
Contain small spills with absorbent pads and prevent runoff to nearby storm drains whenever possible.

FAQ

What counts as an illicit discharge?
An illicit discharge is any non-stormwater material entering the storm drain system, such as oil, chemicals, wash water, or debris.
Who enforces stormwater rules in Des Moines?
Enforcement is led by City of Des Moines Public Works - Stormwater Division, with code enforcement and legal follow-up as needed [1].
How do I report a spill?
Call 911 for emergencies and use the city stormwater report contact for non-emergencies; provide location, photos, and a description [2].

Key Takeaways

  • Prevent pollutants from reaching storm drains — small actions matter.
  • Report suspicious discharges immediately to the city.
  • Keep records and cooperate with inspections to resolve enforcement quickly.

Help and Support / Resources

  1. [1] City of Des Moines - Public Works: Stormwater
  2. [2] City of Des Moines - Stormwater reporting/contact
  3. [3] Des Moines Municipal Code (Municode)

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