Air Dispersion Modeling

Predict Air Quality Impacts With Advanced Dispersion Modeling Expertise

For over 40 years, we have been a leader in air dispersion modeling, supporting industrial facilities, utilities, and government agencies worldwide. Our nationally and internationally recognized expertise, combined with advanced modeling software and infrastructure, allows us to deliver precise simulations of how pollutants disperse in the atmosphere. From regulatory compliance to risk assessment and emergency planning, we provide actionable insights that protect communities, guide permitting, and support informed decision-making.

Service Specifics

Our Air Dispersion Modeling Services

See how our air dispersion modeling services provide accurate predictions, regulatory support, and risk evaluations to strengthen compliance and protect public health.

We conduct regulatory air dispersion modeling, Class I area PSD impact assessments, and regional haze analyses to support permitting and compliance.

Our team evaluates individual and cumulative risks using multi-pathway dispersion modeling to assess air quality, health, and ecological impacts.

We model offshore emissions, roadway emissions, visible plumes, icing, fogging, odor concentrations, and deposition to assess diverse environmental and operational impacts.

Our experts perform off-site consequence analyses and model risk associated with LNG, LFG, vapor cloud explosions, and high explosives to support emergency preparedness.

We complete Photochemical Grid Modeling (PGM) and regional-scale studies to simulate pollutant transformation and transport, supporting EPA attainment demonstrations and policy decisions.

Our experts generate model-ready meteorological datasets, provide training, and develop custom modeling tools, leveraging high-performance computing to enhance efficiency and accuracy.

We support legal professionals serving as consulting experts and testify experts for litigation involving questions of air dispersion and impacts of meteorology on dispersion.

High Stakes Capital Projects

In this issue of EHS Quarterly, we examine how environmental consulting plays a pivotal role in turning regulatory challenges into project advantages. By embedding proactive environmental management and permitting strategies early in the capital project lifecycle, organizations can reduce risk, improve outcomes, and create measurable value.

Learn More

Related Industries

Air Dispersion Modeling for your Industry's Unique Needs

View All Industries

General Manufacturing

Oil & Gas

Real Estate Development

Renewable Energy

Infrastructure

Chemical Manufacturing

Federal, State & Provincial

Data Centers

Featured Projects

See How We’re Helping Clients Achieve Better Outcomes

Miller-Remick Optimizes Hospital Air Quality with Advanced CFD Modeling

Ireland

BusConnects Dublin Case Study

Ireland

Ireland’s First Underground MetroLink Case Study

DART + West Rail Capacity Expansion

Supporting Kentucky Aluminum Facility’s Complex PSD/NSR Air Permitting and Compliance Strategy

View All Projects

CTA Section

As part of the Clean Air Act, Permits by Rule (PBRs) are a type of authorization required for new sources, the addition of a facility, or due to a change in source operations.

Learn More

Air Dispersion Modeling FAQs

Air dispersion modeling is the use of mathematical formulations to simulate how pollutants disperse in the atmosphere, predicting concentrations, deposition, and impacts on health and the environment.

Modeling supports regulatory compliance, permitting, health risk assessments, and emergency planning by providing quantitative data on how emissions affect the surrounding environment.

Depending on the locality and magnitude of air emissions, any industry type may need to complete air dispersion modeling assessments. Industries such as oil & gas, chemicals, utilities, cement, power generation, manufacturing, and transportation frequently require dispersion modeling for permitting and compliance.

We apply a wide range of tools including AERMOD, CALPUFF, and Photochemical Grid Models (PGMs) among others, along with high-performance computing solutions for complex studies.

Yes. We conduct both localized impact studies and large-scale regional modeling, supporting clients in the U.S. and internationally with regulatory and strategic projects.

CTA Section

As part of the Clean Air Act, Permits by Rule (PBRs) are a type of authorization required for new sources, the addition of a facility, or due to a change in source operations.

Learn More

Insights