Ensure your GHG data meets NY Part 253 requirements – accurately quantified, properly documented, and independently verified.
NY Part 253 GHG Reporting Compliance Support
The New York State Mandatory Greenhouse Gas Reporting Program (6 NYCRR Part 253) is a mandatory greenhouse gas (GHG) reporting regulation that requires certain entities operating in New York to annually report GHG emissions to the New York State Department of Environmental Conservation (NYSDEC). The rule supports implementation of the Climate Leadership and Community Protection Act (CLCPA) and applies beginning with calendar year 2026 emissions, with the first deliverable due September 1, 2026, and the first annual report due June 1, 2027.
Key details of the program include:
Applicability: Facilities located in New York that emit 10,000 metric tons or more of CO₂e per year; fuel suppliers delivering natural gas, liquid fuels, petroleum products, LNG, CNG, or coal for use in New York; certain waste transporters exporting solid waste generated in New York; electric power entities; and specified agricultural and waste management operations.
Reporting Requirements: Reporting entities must submit annual emissions data calculated in accordance with DEC-prescribed methodologies and expressed in CO₂e using 20-year global warming potentials (GWP20) consistent.
Methodology: Reports are submitted electronically through the NYSDEC reporting platform. Entities must develop and maintain an Emissions Monitoring and Measurement Plan (EMMP) and retain supporting documentation as required by Part 253.
Large Emission Sources: Facilities emitting 25,000 metric tons CO₂e or more per year, and suppliers exceeding defined fuel thresholds, must obtain annual third-party verification from a DEC-accredited verifier.
Penalties: Failure to report, submit incomplete or inaccurate data, or maintain required records may result in enforcement action and civil penalties.
With the first reports covering 2026 emissions, if your company is subject to NY Part 253, now is the time to evaluate applicability and prepare for timely compliance.
Expert GHG Reporting & Third-Party Verification for Large Emitters
KERAMIDA helps companies comply with New York’s Part 253 regulation through two separate service pathways: reporting support and independent assurance. Our reporting and planning services include developing data collection strategies, preparing GHG inventories aligned with Part 253 methodologies, and assisting companies in developing and documenting monitoring methodologies, EMMPs, internal controls, and quality assurance procedures.
Our assurance services support Large Emission Sources that must meet Part 253’s verification requirements. To uphold the highest ethical standards and prevent any conflict of interest, KERAMIDA does not both prepare and verify the same GHG inventory.
Our NY Part 253 Compliance Services include:
Applicability & Threshold Assessment
GHG Emissions Inventory
Emissions Monitoring and Measurement Plan (EMMP) Development
Large Emission Source Monitoring Plan Support
Pre-Verification Assessment
Third-Party GHG Emissions Data Verification
Recommended Insights:
Why Partner with KERAMIDA?
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KERAMIDA staff have extensive experience supporting facilities subject to the U.S. EPA Mandatory Reporting Rule (40 CFR Part 98), including the development of monitoring plans, emissions calculations, data management systems, and annual electronic reporting. Our team understands subpart applicability determinations, combustion calculation methodologies, emission factor selection, missing data procedures, and QA/QC documentation requirements. This experience directly supports compliance with 6 NYCRR Part 253, as many of the technical calculation frameworks and monitoring expectations are aligned with federal reporting standards. By leveraging our EPA MRR expertise, we help organizations establish defensible, regulator-ready reporting systems that ensure accuracy, transparency, and consistency across state and federal programs.
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We design GHG monitoring plans, internal controls, and QA/QC procedures with verification in mind from the outset. KERAMIDA’s experience supporting third-party assurance engagements ensures that emissions calculations, data collection processes, and documentation controls are audit-ready and defensible. By embedding assurance-aligned practices into compliance programs, we help organizations reduce risk, streamline verification, and maintain regulatory credibility under Part 253.
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Our extensive experience with California’s climate regulations provides valuable perspective on complex emissions reporting programs, allowance-based systems, combustion calibration requirements, and evolving compliance frameworks. Having supported clients through CARB-aligned reporting and assurance processes, KERAMIDA understands the level of precision, documentation, and system integration regulators expect. This insight translates directly to helping organizations proactively and effectively comply with New York’s Part 253 requirements.
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KERAMIDA is a California Air Resources Board (CARB)-accredited GHG verification body, operating within one of the most established regulatory verification frameworks in the United States. Maintaining this accreditation requires a mature quality management system, clearly defined independence and conflict-of-interest safeguards, documented verifier competencies, and structured technical review procedures. This experience reflects our ability to function effectively within regulator-driven assurance programs and demonstrates a strong foundation for supporting and aligning with evolving assurance accreditation requirements under 6 NYCRR Part 253.
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KERAMIDA’s sustainability team is composed of seasoned environmental professionals with decades of combined experience in air quality permitting, emissions reporting, GHG inventory development, and regulatory compliance across multiple sectors. Our multidisciplinary background allows us to understand industry-specific operational realities while translating complex regulatory requirements, such as those under 6 NYCRR Part 253, into practical, implementable solutions. By combining technical depth with hands-on industry knowledge, we help organizations build efficient, compliant, and strategically aligned emissions management programs that withstand regulatory scrutiny and support long-term sustainability goals.
Related Services:
KERAMIDA offers a wide variety of Greenhouse Gas (GHG) services to clients worldwide, including multi-facility industrial clients, industrial associations, law firms, and state organizations. Our experienced team of GHG experts provides carbon footprint evaluations, GHG inventories, GHG monitoring plans, and training.
KERAMIDA develops GHG emissions inventories that are accurate, defensible, and ready for investor and regulatory scrutiny. We quantify Scope 1 (direct), Scope 2 (purchased energy), and Scope 3 (value chain) emissions using the best available organizational data and acceptable methodologies as defined by the GHG Protocol. Whether you have detailed primary data, utility bills, fuel usage records, procurement spend, or supplier-provided estimates, our team can work with what is available to create a complete and transparent accounting of your emissions inventory.
Trusted for Verification and Assurance by Fortune 500 companies from a major U.S. stock market index and a global media & entertainment conglomerate to one of the largest U.S. steel producers and a world leader in marine recreation. KERAMIDA provides independent verification and assurance of GHG emissions for organizations across any industry in accordance with a variety of accepted standards, including ISO 14064-3 standards. KERAMIDA is a CDP Global Gold Verification Provider and an AA1000 Licensed Assurance Provider.
