What is an illicit stormwater discharge?

An illicit discharge is any non-stormwater discharge to a storm sewer or waterway, or unauthorized release of contaminants via stormwater runoff from private property.

How do I report a suspected illicit discharge in New York City?

Report by calling 311 or using DEP complaint tools; provide location, photos, and description of the discharge.

What penalties should I expect?

Penalties can include monetary fines, cleanup orders, and other sanctions; exact fines for a specific notice are listed on the enforcement document or summons.

Illicit Stormwater Discharge Rules - New York City

Utilities and Infrastructure New York 3 Minutes Read · published February 02, 2026

This guide explains illicit stormwater discharge rules and enforcement in New York City, New York. It summarizes who enforces the rules, what counts as an illicit discharge, common violations, reporting paths, and how appeals and compliance work. The article is intended for property owners, contractors, and compliance officers who need clear steps to report, remediate, or contest enforcement actions in the city.

Penalties & Enforcement

The primary enforcer for stormwater and illicit discharge matters in New York City is the Department of Environmental Protection (DEP), with violations often processed through the Environmental Control Board (ECB) or other municipal enforcement channels. Specific monetary penalties and schedules vary by violation type and are not uniformly stated in a single citywide schedule on the municipal pages; exact amounts and daily continuance fines are not specified on the city pages consolidated for public guidance.

Some civil penalties are assessed per day for continuing violations; check the enforcement notice for details.

Enforcer: NYC Department of Environmental Protection (DEP) and Environmental Control Board for adjudication.
Monetary penalties: not specified on the cited municipal guidance pages; see enforcement notice or summons for amounts.
Escalation: first offence, repeat violations, and continuing offences may be charged separately; precise ranges are not consolidated on a single public page.
Non-monetary sanctions: stop-work or remediation orders, site cleanup directives, and court or administrative orders are commonly used.
Inspection and complaints: DEP inspects, accepts reports, and issues notices; complaints may also be routed via 311 for initial intake.
Appeals/review: contested notices are typically heard by the Environmental Control Board or through DEP administrative appeal procedures; time limits to contest a notice are set on the notice or summons.

Applications & Forms

There is no single citywide "illicit discharge permit" form; requirements depend on the project type and may include stormwater pollution prevention plans or construction-related permits. For many regulated discharges, statewide SPDES permits and documentation apply through the New York State Department of Environmental Conservation for discharge permits tied to construction or industrial activity.

If you receive a notice, the enforcement document will list required forms or submission instructions.

Common Violations

Discharging untreated runoff to a storm drain or waterway from a site without required controls.
Poorly managed construction sites lacking erosion and sediment controls.
Failure to submit required pollution prevention plans or to follow permit conditions.

Action Steps

Report active discharges: call 311 or DEP complaint channels immediately.
Document: take photos, record times, and preserve evidence of the discharge.
Notify your site supervisor and engage a qualified contractor to remediate controls.
If you receive a notice, follow instructions and file any required appeals within the time stated on the notice.

FAQ

What is an illicit stormwater discharge?: An illicit discharge is any non-stormwater discharge to a storm sewer or waterway, or unauthorized release of contaminants via stormwater runoff from private property.
How do I report a suspected illicit discharge in New York City?: Report by calling 311 or using DEP complaint tools; provide location, photos, and description of the discharge.
What penalties should I expect?: Penalties can include monetary fines, cleanup orders, and other sanctions; exact fines for a specific notice are listed on the enforcement document or summons.

How-To

Identify: confirm the source and document the discharge with date, time, and photos.
Report: contact 311 or DEP complaint channels and give a clear location and evidence.
Contain and remediate: implement erosion and sediment controls, stop ongoing discharge, and hire licensed contractors if needed.
Respond to enforcement: if you receive a notice, read deadlines, comply with remediation orders, or file an appeal where available.

Quick reporting and documentation reduce enforcement risk and support a stronger defense.

Key Takeaways

DEP enforces illicit discharge rules and ECB handles many adjudications.
Document and report discharges promptly via 311 or DEP channels.