Report Illicit Stormwater Discharges to Ottawa Bylaw Services

Utilities and Infrastructure Ontario 4 Minutes Read · published February 11, 2026 Flag of Ontario

In Ottawa, Ontario, illicit stormwater discharges—unauthorised flows of runoff to storm sewers, ditches or waterbodies—can harm the environment and breach municipal rules. This guide explains how residents, contractors and businesses can identify likely illicit discharges, who enforces Ottawa bylaws, and the exact steps to report incidents to By-law Services and provincial authorities when required. Follow the reporting steps, preserve evidence, and use the official contacts listed below to ensure a timely response and proper investigation.

What counts as an illicit stormwater discharge?

Illicit discharges include visible pollutants (oil sheen, sediment, sewage, laundry or industrial waste), persistent unusual colour or odour in runoff, direct connections discharging process water to storm drains, and dumping of liquids or solids into swales, ditches or storm sewer grates.

  • Take photos and note time, location and flow path.
  • Do not attempt to sample hazardous materials yourself.
  • Report immediately to city complaint lines or 3-1-1 when non-emergency; use provincial spill reporting for hazardous releases.
Collect clear photos and exact location details before calling.

How to report an illicit discharge

Report non-urgent municipal concerns to City of Ottawa resident services or By-law and Regulatory Services; when the discharge poses an immediate hazard or involves hazardous materials, also notify the Ontario ministry spill line. Use the official complaint channels and provide location, description, photos and any witness names.

Contact the City of Ottawa reporting portal or 3-1-1 to log a bylaw complaint or service request [1]. For bylaw enforcement and complaint procedures, see By-law and Regulatory Services information [2]. For hazardous spills that may endanger public health or the environment, call the Ontario spills reporting page as required by provincial rules [3].

  • Note date and time the discharge started and when you reported it.
  • Save photos, video, and any identifying marks on pipes or outlets.
  • Provide your contact details so investigators can follow up; you may remain anonymous for non-criminal reports.
If you suspect an immediate threat to health or waterways, call emergency services and the provincial spills line at once.

Penalties & Enforcement

Enforcement of illicit stormwater discharges in Ottawa is handled through municipal compliance officers and, where applicable, provincial authorities under Ontario environmental laws.

  • Enforcer: City of Ottawa By-law and Regulatory Services and designated compliance officers; provincial enforcement by the Ontario Ministry of the Environment when hazardous spills are involved.
  • Fines: specific monetary amounts for illicit stormwater discharges are not specified on the cited municipal pages; see the cited sources for enforcement practices [2].
  • Escalation: where available, municipal enforcement typically progresses from warning and orders to fines and court prosecution for repeat or continuing offences; exact escalation ranges are not specified on the cited page.
  • Non-monetary sanctions: compliance or stop-work orders, requirements to remediate or clean up discharges, seizure or removal of offending equipment, and referral to provincial regulators for prosecution.
  • Appeals and review: appeal routes and time limits depend on the specific order or ticket issued; specific time limits are not specified on the cited municipal pages and should be confirmed with the issuing office [2].
  • Defences and discretion: officers may consider permits, emergency actions or reasonable excuse; permit exceptions must be verified against applicable approvals and are not fully detailed on the cited municipal page.
Municipal pages often direct immediate hazardous releases to provincial spill reporting rather than municipal complaint lines.

Applications & Forms

The City does not publish a single universal form for reporting illicit stormwater discharges; complaints are normally submitted via the City reporting portal, 3-1-1, or directly to By-law Services. For hazardous spills, provincial online forms or phone reporting requirements apply. Where a permit or site-specific approval is relevant, the permit application is handled through the appropriate City service or provincial permitting portal; the City pages do not list a single form number for illicit discharge reports [2].

FAQ

Who should I call first when I see polluted runoff?
Call City of Ottawa 3-1-1 or the municipal reporting portal for non-emergencies; for hazardous or potentially dangerous spills, call the provincial spills line immediately.
Can I stay anonymous when reporting?
Yes, the City allows anonymous non-criminal complaints, but providing contact details helps investigators follow up.
Will the City inspect private properties?
Authorized officers may inspect private property when enforcing bylaws; specific inspection authorities and procedures are set out by municipal enforcement policies and applicable provincial laws.

How-To

  1. Document the situation: take photos, note location, time, and visible pollutants.
  2. Report to City of Ottawa 3-1-1 or online portal and provide your evidence; request a report or reference number [1].
  3. If the discharge involves hazardous materials, notify the provincial spills reporting line and follow their instructions [3].
  4. Follow up with the issuing enforcement unit if you have not received confirmation within the expected timeframe.

Key Takeaways

  • Report promptly with photos and precise location.
  • Use City 3-1-1 or the municipal complaint portal for non-hazardous discharges.
  • Call the provincial spills line for hazardous releases.

Help and Support / Resources


  1. [1] City of Ottawa - Report a problem
  2. [2] City of Ottawa - By-law and Regulatory Services
  3. [3] Ontario - Report a spill