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Divisions > Air Resources Division > Programs/Bureaus/Units > Air Quality Modeling Program >

Air Quality Modeling Program

Air quality modeling uses computer programs, or models, to simulate the flow of air pollution in the atmosphere and to predict the associated health and environmental impacts. By utilizing mathematical equations that replicate weather patterns and characteristics of the physical atmosphere, models are able to simulate the release and transport of air pollutants from their sources. Air quality models can also incorporate chemical reactions that occur in the atmosphere, as well as account for the effects of precipitation and the gravitational settling of airborne particles. Using these methodologies, air quality models then produce an estimation of pollution concentrations or depositions at specific locations of concern. more …

Rules/Regulatory

• New Hampshire Administrative Rules Governing the Control of Air Pollution
  • Env-A 300: Ambient Air Quality Standards
    establishes the ambient air quality standards for the pollutants that are assessed in DES’s permit and regional modeling efforts.
  • Env-A 600: Statewide Permit System
    Env-A 606 specifies the requirements for performing an air pollution dispersion modeling impact analysis as part of the DES air permit application process.
  • Env-A 1400: Regulated Toxic Air Pollutants
    sets forth ambient air limits for regulated toxic air pollutants and contains additional air dispersion modeling requirements. Note, please anchor to rule.

Technical Assistance

• AERMOD Dispersion Model – Input Data and Help Guide
  Meteorology, terrain elevation data, background air quality and technical support for running the AERMOD dispersion model

Training

• Summary of Changes to Env-A 600 Statewide Permit System – October 10, 2012
  • Env-A 606 Modeling Applicability Flowchart
  • Modeling Applicability Examples

Related Programs

• Air Permitting for Stationary Sources
• Air Pollutants of Concern
• Air Quality Forecast (Maps)

Resources/Links (Complete List)

• Preferred/Recommended Models for Permit and Regional Modeling Applications
  • EPA’s Support Center for Regulatory Atmospheric Modeling (SCRAM)
• Air Quality Forecasting and Analysis Tools
  • Current Conditions in NH (includes observations and radar)
  • Current Surface Streamline Analysis
  • National Surface Map of Current Weather Conditions
  • Satellite Image
• Air Permitting & Modeling Consultants List

Contact Us

• Lisa Landry
  Modeling Section Supervisor
  Permit Modeling
  NHDES Permitting & Environmental Health
  29 Hazen Drive; PO Box 95
  Concord, NH 03302-0095
  (603) 271-6803
  (603) 271-1381 (fax)
  lisa.landry@des.nh.gov
• David Healy
  Air Quality Analyst
  Regional Modeling
  NHDES Atmospheric Science & Analysis
  29 Hazen Drive; PO Box 95
  Concord, NH 03302-0095
  (603) 271-0871
  (603) 271-1381 (fax)
  david.healy@des.nh.gov

 

 

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NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm