NYC DEP air permits and registrations apply to regulated fuel-burning equipment, industrial processes, generators, and other emission sources covered by the New York City Air Code and DEP rules. DEP uses the Clean Air Tracking System (CATS) for new applications, renewals, amendments, cancellations, and other air-permit actions.
A DEP air filing is separate from the DOB permit that may be required to install or alter the underlying equipment. For example, DOB oversees boiler installation while DEP can require registration or an air permit based on equipment capacity, fuel, and other regulatory criteria.
For the complete DEP topic hierarchy, see NYC DEP Permits, Filings and Compliance.
CATS is DEP’s electronic Clean Air Tracking System. Owners, agents, licensed professionals, and other authorized users use the system for current air applications, registrations, renewals, amendments, and related transactions. CATS also provides property-level air-permit information searches.
DEP has registration and permit requirements for qualifying boilers and water heaters. NYC311 notes that boilers at or above applicable capacity thresholds require DEP registration or permitting, while DOB separately controls installation and removal permits. Equipment size, fuel, and aggregate capacity should be confirmed before selecting the DEP filing.
DEP also uses CATS for regulated industrial processes and combustion sources. Current DEP guidance includes registrations for gas stations, engines, generators, char boilers, solid-fuel equipment, and other process sources. Where the correct category is unclear, DEP provides an Industrial Process Questionnaire to help determine the filing path.
Air compliance continues after initial approval. Changes in equipment, fuel, ownership, process, or operating conditions can require amendments or new filings, and registrations or permits may require renewal. Existing CATS records should be reviewed before submitting a new application so the project does not create conflicting equipment histories.
DEP regulates the air-emission approval or registration assigned to it. DOB controls building, mechanical, fuel-gas, and equipment-installation requirements under the construction codes. One agency approval does not replace the other.
SLK Buildings assists property owners, developers, business operators, design professionals, contractors, and project teams with air permits research, filing preparation, agency coordination, comments, approvals, compliance, and related NYC agency requirements within the confirmed service scope.
Disclaimer: SLK Buildings is a private consulting and construction-management firm and is not affiliated with NYC DEP or any government agency. This content is educational and is not engineering, architectural, legal, environmental, plumbing, or other professional advice. Applicability, design, licensed work, technical calculations, filing eligibility, inspections, and compliance requirements must be confirmed for the specific project by the appropriate qualified professionals and agencies.
NYC Department of Environmental Protection (DEP) requirements can affect property owners, developers, business operators, design professionals, contractors, and project teams when work involves water or sewer connections, hydrants, backflow protection, stormwater, wastewater, asbestos, air emissions, construction noise, drilling, records, violations, or other environmental requirements administered by DEP.
Before relying on a filing path, the project team should confirm the regulated activity, existing infrastructure and property records, required DEP program, current portal or submission method, licensed professional or trade requirements, inspections, testing, and related DOB, DOT, NYS DEC, FDNY, or OATH coordination.
At SLK Buildings, we assist with NYC DEP permit expediting, agency filings, Site Connection Proposals, sewer and water coordination, hydrant work, backflow, stormwater, drainage, wastewater, asbestos, air, noise, drilling and excavation coordination, records research, violations, hearings, and related multi-agency project requirements within the confirmed service scope.
Whether you are beginning a new DEP application, responding to agency comments, researching existing water or sewer conditions, coordinating licensed professionals and contractors, correcting a compliance issue, or carrying a DEP approval into related construction permitting, SLK Buildings can help organize the records, filings, coordination, and next actions needed to move the project forward.
SLK Buildings provides free educational content to help property owners, developers, business operators, design professionals, contractors, and project teams understand NYC DEP permitting, filing systems, water and sewer approvals, stormwater, environmental compliance, inspections, records, and related agency requirements.
For those who prefer professional assistance, SLK Buildings is available to coordinate DEP application strategy, filing preparation, portal submissions, agency comments, records research, licensed-professional and contractor coordination, approval tracking, violation response, and related NYC agency requirements that may affect the property or project.
Disclaimer: SLK Buildings is a private consulting and construction-management firm and is not affiliated with NYC DEP or any government agency. This content is educational and is not legal, engineering, architectural, environmental, or other professional advice. Permit, filing, design, testing, inspection, and professional-signature requirements depend on the specific property, project, regulated activity, and current agency rules.
CATS is DEP’s Clean Air Tracking System for air applications, registrations, renewals, amendments, and related actions.
No. DOB oversees boiler installation and removal permits. DEP separately administers the applicable air registration or permit.
Some engines, generators, and combustion sources require DEP registration or permits depending on the equipment and operating conditions.
Yes. DEP uses CATS for amendments and other actions when approved equipment or operating information changes.
Yes. SLK can coordinate the related agency filings and project dependencies within its service scope.
