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Welcome to NY-CHAPPA v2.0, the Community Health and Air Pollution Policy Assessment tool. NY-CHAPPA v2.0 can be used to analyze the air quality and public health impacts of changes in air pollutant emissions, such as from proposed energy and environmental policies in New York State. NY-CHAPPA v2.0 models changes in fine particulate matter (PM2.5) concentrations, changes in health outcomes, and the monetized value of those outcomes in each of eight New York regions shown below. The results are presented at a highly resolved census tract resolution, which allows users to determine the fraction of health benefits accruing to disadvantaged communities, using the definitions from New York's Climate Justice Working Group.

NY-CHAPPA v2.0 was used for the public health analysis of the 2025 New York State Energy Plan. The emissions scenarios analyzed for the State Energy Plan are available for users on the Reference and Scenario Emissions Inputs pages.

How to Use NY-CHAPPA v2.0

  1. Download the base emissions data for New York state for the year of interest. Emissions are reported as area sources (mix of census block groups and tracts), point sources, and road segments (line sources). Years are 2025, 2030, 2035, 2040, 2045, and 2050.
  2. Modify the base emissions as needed to create your scenario emissions. Refer to the Help page for input file format details.
  3. Create a new scenario in NY-CHAPPA v2.0 by uploading your emissions data.
  4. After you create your scenario, NY-CHAPPA v2.0 will provide a unique scenario ID and status link.
  5. NY-CHAPPA v2.0 will model your emissions changes and calculate changes in concentrations and associated health impacts. Once the data processing is finished, you'll receive an email letting you know your results are ready for download.

Data Retention: As part of our data management and clean-up policy, all results generated from your NY-CHAPPA v2.0 scenario will be kept for 7 days. After this period, the results will be removed. We encourage you to download your results while they are available.