New York, NY Environmental Rules: Stormwater Management (2026)
Key Facts
- Trigger threshold
- 1 acre or more of soil disturbance
- Enforcing agency
- NYC Department of Environmental Protection
- Civil penalty
- Up to $15,000 per violation, per day
- Criminal penalty
- $250-$10,000 fine and/or 30 days jail
- Recordkeeping
- 5 years for inspection and test records
- Maintenance permit
- Renewed every 5 years
Summary
New York City requires a stormwater construction permit from the Department of Environmental Protection before any development activity begins on a covered development project, defined as soil disturbance of one acre or more. Admin Code § 24-551 makes it unlawful to commence such work without department approval of a certified stormwater pollution prevention plan first.
§ 24-550 General. This subchapter regulates land development activities of covered development projects.
§ 24-551 Stormwater construction permit required. It shall be unlawful to commence or engage in any development activity on the site of a covered development project unless and until a stormwater construction permit has been issued by the department.
Full Breakdown
The permit requirement covers any covered development project: development activity, meaning soil disturbance from land contour work, clearing, grading, excavation, demolition, construction, or fill placement, equal to or greater than one acre, or a smaller threshold DEP sets by rule, including projects that are part of a larger common plan of development totaling an acre or more under § 24-541. Before breaking ground, the developer must submit a stormwater pollution prevention plan (SWPPP) certified by a qualified professional to DEP for review under § 24-552; for MS4 projects also covered by the NYSDEC construction general permit, the developer must include a copy of the notice of intent.
DEP reviews the plan within the timeframe set in its rules, and if the plan is rejected, DEP must notify the developer of the specific deficiencies. Once accepted, DEP issues the stormwater construction permit, and for MS4 sites an MS4 acceptance form for filing with the state. A copy of the accepted plan must stay on site from the start of work through project termination and be available to DEP inspectors and authorized qualified inspectors under § 24-554. Developers must keep inspection and test records for five years after construction ends and, for post-construction inspections, five years after the inspection under § 24-555.
If DEP finds work is being done in violation of the subchapter or the plan in a way that could affect pollutant discharge, it can issue a stop-work order that must be posted at the site; work must halt immediately except safety-related work, and it is unlawful to remove or deface the posted order until DEP rescinds it under § 24-558. Where a post-construction stormwater facility is required, DEP will not approve a notice of termination until a maintenance easement binding future owners is executed and recorded with the city register or county clerk under § 24-559, and the owner must obtain and renew a stormwater maintenance permit every five years under § 24-560.
Violations & Fines
Working without an approved plan or permit, or violating a stop-work order, exposes a developer to a civil penalty of up to $15,000 per violation from the Environmental Control Board within the Office of Administrative Trials and Hearings, with each day of continuing violation counted separately under § 24-585. A knowing violation is also a misdemeanor punishable by a fine of $250 to $10,000, up to 30 days in jail, or both, again for each day of continuance under § 24-586. DEP may also suspend or revoke the permit itself after notice and a hearing under § 24-557.
Frequently Asked Questions
Do I need a stormwater permit for a small renovation?
What happens if DEP rejects my SWPPP?
Can DEP shut down my job site?
How long do stormwater maintenance permits last?
Sources & Official References
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