Meteorological Solutions Inc.

Air quality consultants (located in Salt Lake City, Utah, USA) who provide a comprehensive range of air dispersion modeling services. The site includes links to the specifics of their various services as well as to a listing of the names, email addresses,
http://www.metsolution.com/

AirNova Inc.

Services include stack testing, stationary source isokinetic sampling, continuous emission monitoring, compliance permitting, air toxics pollution emission sampling, ambient air quality dispersion modeling. Located in Pennsauken, New Jersey, USA.
http://www.airnova.com

Acu Tech

A nation-wide consultant firm (headquartered in San Francisco, California, USA) specializing in process safety and risk management services, training, and software. AcuTech makes use of these dispersion modeling programs: ALOHA, ARCHIE, DEGADIS, HGSYSTEM
http://www.acutech-consulting.com/consulting/release.html

Applied Modeling Inc. (AMI)

Consultants (in Woodland Hills, California, USA) who offer services in: dispersion modeling (using ISCST3 model); regional air quality modeling (for ozone and for particulate matter); urban airshed modeling; and accidental release modeling (using ALOHA, C
http://www.amiace.com

DNV

Det Norske Veritas (DNV), headquartered in Oslo, Norway, is an international consulting firm with numerous offices worldwide. Their primary focus is on safety, environmental, risk management, and consequence analyses using their own PHAST dispersion model
http://www.dnv.com

Bison Engineering, Inc.

An environmental engineering firm headquartered in Helena, Montana, USA, whose services include: air dispersion modeling; air emission inventories, air permit applications, and risk management plans (RMPs).
http://www.bison-eng.com/air.html

Cambridge Environmental Research Consultants

Scientific consultants in the field of atmospheric dispersion located in Cambridge, England.. They offer a range of air dispersion models including: ADMS 3 for dispersion of industrial emissions; ADMS-SCREEN for initial screening studies of emission
http://www.cerc.co.uk

Enviroware s.r.l.

These consultants, located in Italy, provide a number of air dispersion models. The site includes an online Gaussian dispersion model called Tox-Flam, for releases of inert buoyant pollutants into a mixing layer of a user-specified height.
http://www.enviroware.com

McVehil-Monnett Associates

An air quality consulting firm, headquartered in Englewood, Colorado, USA with other offices in Arizona and Wyoming. Their services include air dispersion modeling for determining: ambient impacts for permitting industrial sources, impacts of cooling tow
http://www.mcvehil-monnett.com/

Tech Environmental Inc. (TEI)

Located in Waltham, Massachusetts, USA, TEI provides consulting for air quality and noise issues. Their services include: permit applications; siting and feasibility studies; environmental impact assessments; and technical support tasks such as air disper
http://techenv.com/

MET Associates

A consultant firm in Dayton, Texas, USA that provides litigation support and expert witness testimony to environmental lawyers and to insurance companies for either plaintiffs or defendants in court cases that involve air dispersion and air quality modeli
http://www.metassociates.net/

ENSR: Environmental Consultants and Engineers

A worldwide environmental service company (headquartered in Westford, Massachusetts, USA) that has developed: dispersion models that accommodate complex terrain and aerodynamic downwash; visibility models; hazardous air pollutant dispersion models; and ot
http://www.ensr.com

RTP Environmental Associates

RTP has offices nationwide in the USA and has performed modeling studies for: rural and urban locations; single-point sources; complex multi-source industrial sources; flat terrain; complex terrain; and time and spatial scales from short-term to multi-yea
http://rtpenv.com/

Dyadem International, Ltd.

A software development company in Toronto, Canada that also provides a full range of risk management consulting services. They offer software for Risk Analysis, Process Hazard Analysis (PHA), HAZOP, Failure Modes and Effects Analysis (FMEA), and Risk Mana
http://www.dyadem.com

Earth Tech

A worldwide environmental consultant firm, headquartered in Long Beach, California, USA, whose modeling group are recognized experts in air dispersion modeling. They have developed or enhanced many models (CALPUFF, CALMET, CALGRID, BLP, ISC3, CTDMPLUS, O
http://src.com/aq/amodels1.htm

WebMET

WebMET is a repository of meteorological data for air dispersion models such as ISCST3, ISC-PRIME and AERMOD, as well as for digital elevation terrain data. The data covers the entire United States and can be downloaded free of charge. The site is sponso
http://www.webmet.com

Grove Scientific Engineering

Environmental engineering consultants, located in Orlando, Florida, USA, whose services include: industrial air pollution studies, air permitting, emission inventories and air dispersion modeling.
http://www.grovescientific.com/air_pollution.html

Hastings Engineering, Inc.

Chemical and environmental consultants based in St. Louis, Missouri, USA whose services include air dispersion modeling used for: air permitting, accidental release modeling, and risk assessments.
http://www.hastingsengineering.com/Engineers.htm

Iris Environmental

Consulting and engineering firm based in Oakland, California , USA whose environmental management services include air dispersion modeling.
http://www.irisenv.com/main/

Zephyr Environmental Corporation

An environmental consulting firm, headquartered in Austin, Texas, USA, whose air dispersion modeling services include: simple and complex terrain modeling; line and mobile source modeling; and modeling of accidental dense gas releases. Zephyr utilizes U.
http://www.zephyrenv.com/nonframes/serv.air.html

Aegis Environmental Inc.

Located in Richmond, Virginia, USA, the Aegis Environmental firm offers environmental consulting services including air dispersion modeling, offsite consequence analyses, air permitting and regulatory compliance strategies.
http://www.aegis-environmental.com/services.html

EnviroChem Engineering Consultants

Located in Wolfville, Nova Scotia, Canada, the EnviroChem Engineering Consultants firm offers chemical engineering services as well as environmental engineering services. Their environmental services include ambient air monitoring, stack sampling and air
http://home.istar.ca/~ece/model.html

The Air Group

Consultants located in Dallas, Texas, USA who offer air permitting and compliance services, air dispersion modeling, and training workshops.
http://theairgroup.net

Lehder Environmental Services

A Canadian consulting firm offering services in air dispersion modeling (including odor dispersion), stack sampling, and environmental permitting. Most of Lehder's modeling work for clients utilizes the U.S. EPA's Industrial Source Complex Short Term Mode
http://www.lehder.com/airquality/air_dispersion.html

Pacific Environmental Services (PES)

Nationwide company headquartered in Herndon, Virginia, USA. The PES modeling section specializes in developing, evaluating, and applying air pollution dispersion models. PES was involved in developing the U.S. EPA's dispersion models, such as ISC3, SCREEN
http://home.pes.com/disper.html

Wenck Associates

Consulting engineers based in Maple Plains, Minnesota, USA with multiple other offices in Minnesota. Their services include the use of air dispersion modeling for air permitting, regulatory compliance studies, air toxics evaluation, and New Source Review
http://www.wenck.com/air_svcs.htm

Mike Lyons and Associates

Consultants located in Balwyn, Victoria, Australia. Services offered include air pollution plume dispersion modeling using the Australian EPA's latest "AUSPLUME" package as required under the State Environment Protection Policy (SEPP).
http://www.mikelyons.com.au

Pollution Control Consultancy and Design

An acoustical and environmental engineering consulting firm based in Sydney, Australia that provides a range of services which includes air dispersion modeling.
http://www.pccd.com.au/airpol.htm

Pacific Air and Environment

A consultant group, headquartered in Brisbane, Australia with satellite offices in Melbourne and Sydney, who offer air quality modeling and emissions estimation services. The air dispersion models used include models developed in Australia (AUSPLUME, AUSP
http://www.pae.net.au

The Weinberg Group

A scientific and regulatory consulting firm, headquartered in Washington,DC, whose services include air dispersion modeling.
http://www.weinberggroup.com

Sanders Engineering & Analytical Services, Inc.

An environmental engineering firm based in Mobile, Alabama, USA that specializes in air permitting and air quality testing. Their air dispersion modeling includes the use of the U.S. EPA's ISC short and long term models, complex terrain modeling, and the
http://www.sandersengineering.com/Index.htm

Vector AS

Vector AS is based in Tønsberg, Norway and offers air dispersion modeling using WindSim, which is a flow and dispersion simulator for complex terrain using computational fluid dynamics (CFD).
http://windsim.com/

Cambridge Environmental Inc.

A group of environmental consultants headquartered in Cambridge, Massachusetts, USA. Their services include the use of air dispersion modeling in support of health risk assessments.
http://www.cambridgeenvironmental.com/services/transport.htm

Theakston Environmental Control, Inc.

Environmental consultants located in Ontario, Canada whose services include physical modeling as well as computer modeling of stack exhaust gas dispersion and dust dispersion.
http://www.theakston.com/exhaust.htm

BlazeTech Corporation

Consultants (in Cambridge, Massachusetts, USA) with expertise in: air dispersion modeling, off-site consequence analysis, fire and explosion, and other safety problems. For dispersion modeling, the firm uses ADORA (Atmospheric Dispersion of Reacting Agent
http://www.blazetech.com

Air Science Inc.

A consulting firm in Lakewood, Colorado, USA offering services in the air quality aspects of environmental impact studies, air quality and meteorological monitoring, dispersion modeling, visibility degradation analysis, and permitting of industrial facili
http://www.airsci.com/

Enviroplan Consulting

A consulting firm (headquartered in Fairfield, New Jersey, USA) that offers services in air dispersion modeling, air quality and meteorological monitoring, air pollution emissions estimation, permitting and compliance plans, hazard assessments and risk ma
http://www.enviroplan.com

EnCoCo

A firm headquartered in Lahaina, Hawaii, USA and offering air dispersion modeling software focused primarily upon the regulatory requirements of Germany.
http://www.encoco.com

Pinchin Environmental Ltd.

A consultant group based in Mississauga, Ontario, Canada (with multiple offices in Canada) who offer air dispersion modeling services. The dispersion models utilized include Ontario Regulation 346 as well as these U.S. EPA models: Screen3, ISCST3, AERMOD
http://www.pinchin.net/services/air/air.htm#Dispersion

Shell Engineering & Associates

Environmental management consultants located in Columbus, Missouri, USA. Their services include: air quality monitoring; air permitting; and air dispersion modeling involved in evaluating the offsite consequences of accidental releases and of air toxics e
http://www.shellengr.com/Dispers.htm

Jim Clary & Associates

Consultants, based in Dallas, Texas, USA, who offer dispersion modeling services and a proprietary Air Modeling Organizational System (AMOS) designed to create input files and organize all of the ISCST modeling runs for an entire project.
http://www.jimclaryandassociates.com/default.htm

Entech Engineering

A consulting firm based in Westboro, Massachusetts, USA who provide technical support and computer software to the nuclear power industry in the areas of radiological engineering, and atmospheric dispersion of radioactive effluents.
http://www.entechengineering.com/aeolus3.htm

Stone Lions Environmental Corporation

A consulting firm headquartered in Rolling Hills Estates, California, USA who offer services in air dispersion modeling, toxic chemical exposure evaluations, reconstruction of past environmental exposures, and specialized software.
http://www.stonelions.com/homepage.htm

EnviroComp Consulting, Inc.

EnviroComp Consulting (based in Fremont, California, USA) develops and applies computational techniques to study environmental problems and, in particular, air pollution by using data analysis, simulation modeling, statistical methods, and advanced visual
http://envirocomp.com/whoweare.htm

Cermak Peterka Peterson Inc. (CPP)

A wind engineering consulting firm (located in Fort Collins, Colorado, USA) that offers wind tunnel modeling of pollutant transport and dispersion involving complex building and terrain situations.
http://www.cppwind.com/services/pollut.html

NPN Environmental Engineers

Consulting environmental engineering firm located in St. Louis, Missouri, USA. Services include air dispersion modeling, air emission inventories, air permitting and compliance programs.
http://www.npnenv.com/air_quality.htm

Stanger Science and Environment

Environmental consultants with multiple offices in England. Together with the University of Greenwich, Stanger operates a 24-hour telephone helpline for air dispersion modeling.
http://www.stanger.co.uk/default.asp?page=airqual/modelhlp/helpline.htm

Exponent, Inc.

A firm of scientific and engineering consultants, headquartered in Menlo Park, California with multiple offices across the United States, whose services include air dispersion modeling.
http://www.exponent.com/practices/hydrology/airquality.html

D&E Technical

D&E Technical is an environmental engineering and software development company located in Champaign, Illinois, USA. Their services include air dispersion modeling and hazard analysis.
http://www.detech.net/aboutde.htm#Air

Janicke Consulting

A consulting firm located in Dunum, Germany who develop and market air dispersion modeling software, such as: LASAT, a Lagrangian dispersion model; IBJplume, a Gaussian model; IBJXodor; a model specifically for odor dispersion.
http://www.janicke.de/htm/e_products.htm

Castings Development Centre

A research/development/consultancy facility located in Sheffield, England that uses the ADMS-2 dispersion model to offer air pollution dispersion modeling services to the castings production industry.
http://www.castingsdev.com/

Applied Environmental Consultants, Inc.

Consultants located in Tempe, Arizona, USA who provide air dispersion modeling in support of air quality permitting and impact analyses as well as air quality regulatory compliance.
http://www.aecinc.org/html/airimpact.html

Sullivan Environmental Consulting

This firm (located in Alexandria, Virginia, USA) offers services including urban scale air quality assessment, exposure assessment, permit support, air quality modeling, and risk management planning.
http://www.sullivan-environmental.com/serv01.htm

Ambient Air Services, Inc.

Located in Starke, Florida, USA, this firm's services include: air dispersion modeling; stack design and building downwash evaluations; toxic air pollution studies, model validation studies; and air quality impact analyses.
http://www.atlantic.net/~aasi/modeling.htm

Sage Environmental Services

An environmental consulting company based in Texas (with offices in Richardson, Austin and Beaumont) who offer services in air dispersion modeling, air permitting and compliance, risk management plans and offsite consequence analyses.
http://www.sageenvironmental.com/services.htm

Engineering, Compliance & Construction, Inc.

Environmental engineering consultants based in Little Rock, Arkansas, USA who utilize air dispersion modling in their air permitting services, compliance studies and air toxics studies.
http://www.ecci.com/envcapable/airdispersion.htm

Power Technology

The engineering and scientific center of PowerGen UK plc. They use various models to simulate gas and dust dispersion from: industrial chimneys, stockpiles, fugitive sources, accidental releases, and cooling tower plumes. The models include: ADMS (Atmosph
http://www.powertech.co.uk/env_fuel/env_modelling.htm

P & I Design Ltd.

A chemical engineering and environmental management consultancy located in Stockton-on-Tees, England. They have developed a basic Gaussian dispersion model implemented with Microsoft's Excel spreadsheet program.
http://www.pidesign.co.uk/disperse.htm

ATMET

Environmental and meteorological consultants located in Boulder, Colorado, USA whose services include air pollution dispersion modeling, emergency response modeling, long range transport, and applied atmospheric research.
http://atmet.com/html/about.shtml

Liaise Environmental, Inc.

A consulting firm based in Dallas, Texas, USA offering air quality permitting and related environmental services including air dispersion modeling.
http://www.liaise.org/airquality.html

Environmental Risk Limited

An environmental consulting and engineering firm (located in Bloomfield, Connecticut, USA) whose air quality services include air emissions dispersion modeling, accidental release modeling, and cooling tower impact modeling.
http://www.erl.com/services_consulting.htm

Vipac Engineers and Scientists

A company headquartered in Melbourne, Australia whose consulting services include air pollution dispersion modeling using models such as AUSPLUME, CALINE 4, MAXCON, RTDM and AIRPLAN.
http://www.vipac.com.au/infrastructure/index.asp?page=pollution&page=index

NRG

A nuclear research, engineering and consultancy group with offices in Petten and Arnheim in the Netherlands. Their services include environmental and dose assessments of radionuclides using dispersion modeling in air, water and soil.
http://www.nrg-nl.com/product/re/dispersion/index.html

Compliance Partners, Inc.

An environmental consulting firm headquartered in Littleton, Colorado, USA (with other offices in Oklahoma and Wyoming) whose services include permitting, dispersion modeling, and developing and implementing compliance programs for the natural gas industr
http://www.compliance-partners.com

PCR Services

An environmental consulting firm based in Southern California, USA, whose services include air dispersion modeling, stationary source permitting, and emission inventories, allotments, and mitigations.
http://www.pcrnet.com/divisions/quals_air.htm

Air Noise Environment Pty. Ltd.

Environmental consultancy based in Brisbane, Australia specializing in stack emission testing and air dispersion modeling using AUSPLUME, CAL/AUSPUFF, ISC3, TAPM and AERMOD with particular emphasis on air dispersion from tunnels.
http://www.ane.com.au

Keramida Environmental, Inc.

An environmental consulting firm based in Indianapolis, Indiana, USA whose air quality services include: emission inventories, air permitting, risk management plans, and air pollution dispersion modeling.
http://www.keramida.com/

Fluent, Inc.

Headquartered in Lebanon, New Hampshire, USA with other offices nationwide and worldwide, this firm specializes in computational fluid dynamics (CFD) modeling. Their many services include atmospheric plume dispersion modeling.
http://www.fluent.com/solutions/environmental/env2.htm

The Chambers Group

An environmental consulting firm based in Irvine, California, USA whose range of services includes atmospheric dispersion modeling for: air toxics assessments, air permitting, compliance studies, and consequence analyses of accidental releases.
http://www.chambersgroupinc.com/air_quality_management_services.htm

Woodard and Curran

A multi-office environmental consulting firm headquartered in Portland, Maine, USA whose services include air dispersion modeling, air permitting and compliance, air toxics studies and risk management plans.
http://www.woodardcurran.com/aoe_Info/SectorID/2/AOEID/1

ENSCO, Inc.

Consulting engineers and scientists based in Springfield, Virginia and Melbourne, Florida with other nationwide offices on the USA. Atmospheric science services include air pollution dispersion modeling and developing customized dispersion models.
http://www.ensco.com/products/atmospheric/

D'Appolonia S.p.A.

Engineering consultants and designers based in Genoa, Italy whose services include risk assessment studies and industrial air pollution dispersion modeling.
http://www.dappolonia.it/e/1/air_qual.htm

S.M. Stoller Corporation

An environmental consulting firm headquartered in Lafayette, Colorado, USA with other offices in Idaho, New Mexico and Texas. Their services include risk assessments and air pollution dispersion modeling.
http://www.stoller.com/air_dispersion.htm

Omni Environmental Associates

An environmental consulting firm based in Research Triangle Park, North Carolina, USA whose air quality services include air permitting, compliance studies and air dispersion modeling.
http://www.environmentalengineers.com/serviceair.html

Conestoga_Rovers & Associates

An engineering, construction and environmental consulting firm based in Nottingham, England with 40 offices in Europe and North America. Their services include air pollution dispersion modeling in support of environmental impact studies as well as respons
http://www.cra.co.uk/pdf/8%20air%20quality.pdf

General Physics Corporation

Based in Columbia, Maryland, USA (with other offices in Canada, South America, Europe and Asia), General Physics is a firm of scientists, technologists and engineers whose air emissions management services include air dispersion modeling in support of air
http://www.gpworldwide.com/pdf/envir/envir_air_emission_mgmt.pdf

Transoft International

A multinational company, based in St. Denis, France, offering technology solutions and consulting services in the field of computational fluid dynamics including air dispersion modeling for environmental impact studies, accidental releases, and risk asses
http://www.fluidyn.com

Rogers and Callcott

An environmental consulting firm (located in Greenville, South Carolina, USA) whose services include air dispersion modeling, air permitting and air toxics evaluations.
http://www.rogersandcallcott.com/environmental.htm

EngConsult:

A consulting firm based in Brampton, Ontario, Canada (with an office in Dhaka, Bangladesh) whose services include air dispersion modeling.
http://www.eng-consult.com/ECservice-AirQuality.htm

E&A Environmental Consultants

A consulting firm, headquartered in Stoughton, Massachusetts, USA with other offices in the states of North Carolina and Washington, that utilizes air dispersion modeling as part of their services in odor abatement.
http://members.aol.com/eaenviron/models.html

Regulatory Compliance Partners

A consulting firm (based in Baton Rouge, Louisiana, USA and Houston, Texas, USA) whose services include air dispersion modeling, risk management plans and emergency response plans.
http://www.your-rcp.com/specialties/chemhazard.shtml

YSA Atmospheric Modeling

Yamada Science & Art Corporation (YSA), located in Santa Fe, New Mexico, USA, specializes in computer modeling of atmospheric airflows and the dispersion of airborne materials over complex terrain. YSA developed, markets, and provides user support for the
http://ysasoft.com/index.htm

Aspen Environmental Group

An environmental consulting company based in Agoura Hills, California, USA whose services include air dispersion modeling and air quality impact assessments, air permitting, air toxics studies, and risk assessments.
http://www.aspeneg.com

Air Quality Services

Based in Evansville, Indiana, USA, with additional offices in the states of Tennessee and Florida, the Air Quality Services firm offers consulting services including air dispersion modeling, ambient air monitoring, air permitting and emission inventories.
http://www.aqsllc.net/modeling.htm

Westbrook Environmental Inc.

Located in San Diego, California, the environmental services offered by this firm include air dispersion modeling, offsite consequence analyses, air permitting, toxic emission evaluations and risk assessments. Models used include: ISCST3, CALPUFF, SCREEN3
http://www.wei-air.com/practice/area3.html

Affinity Consultants

Environmental consultants based in Canal Fulton, Ohio, USA, whose air services include dispersion modeling.
http://www.affinityconsultants.com/services.php

GexCon AS

A consulting group in Norway that uses a CFD program called FLACS to model the dispersion of leaks (on offshore oil drilling platforms) as well as their subsequent ignition and explosion. Far field blast effects (up to two kilometers away) from such explo
http://www.gexcon.com

Church and Trought

An environmental engineering firm based in Toronto, Ontario, Canada whose services include air dispersion modeling. The dispersion models used include the Ontario Ministry of Environment Regulation 346 model as well as the USA EPA models ISC3 and AERMOD.
http://www.churchandtrought.com/services.asp?ID=11

Preston Engineering

An environmental consulting firm headquartered in Davenport, Iowa, USA, whose services include air pollution dispersion modeling.
http://www.prestonengineering.com/services/air.htm

NatSteel Enviro Tech

Based in Singapore, NatSteel Enviro Tech comprises four divisions: steel mill services, industrial wastes, wastewater treatment, and air quality. The air quality division offers air pollution dispersion modeling services.
http://www.natsteelenvirotech.com.sg/airquality.htm

Earthguard Environmental Group Inc.

Earthguard Environmental is a consulting firm (based in Richmond Hill, Ontario, Canada) that provides services for development, evaluation and application of air dispersion models using EPA and other regulatory models as well as specialized models designe
http://www.earthguard.ca

O'Brien and Gere

A firm of environmental consultants and engineers with corporate headquarters in Syracuse, New York and other offices nation-wide in the USA as well as Canada and the UK. Their services include air permitting, air regulation assistance and air dispersion
http://www.obg.com/environmental/

Windtech Consultants

A firm of consulting engineers (based in Arncliffe, NSW, Australia) whose services include air pollution dispersion studies by physical modeling in a wind tunnel.
http://windtech.com.au/atmospheric_pollution.html

Murray & Trettel Inc.

A firm of certified consulting meteorologists (located in Northfield, Illinois) whose environmental services include air dispersion modeling.
http://www.weathercommand.com/DispersionModeling.htm

Hamon-Custodis

Engineering firm (headquartered in Somerville, New Jersey, USA)that designs, constructs and maintains industrial chimneys and smokestacks. Their engineering services include air dispersion modeling. The firm is part of the Hamon Group (headquartered in
http://www.hamon.com/site/presence/local_home.asp?ID1=8&ID2=22&ID3=2

Atmospheric and Environmental Research (AER)

A nation-wide consultant firm, headquartered in Cambridge, Massachusetts, USA, whose air quality modeling services include model development, applications, customization and testing. Models developed and used by AER encompass such air quality issues as ph
http://www.aer.com/services/regulatoryComp.html

Primatech, Inc.

A consulting firm based in Columbus, Ohio, USA and with multiple offices in North America. Their services include: process hazard analyses; source term calculations; air dispersion and consequence modeling; and probability modeling. They also market propr
http://www.primatech.com/consulting/services/dispersion_and_consequence_modeling.htm

AlphaTRAC Inc.

A consulting firm located in Westminster, Colorado, USA that offers atmospheric dispersion modeling including dense gases, hazardous releases and complex terrain.
http://www.alphatrac.com/

Serene Environmental Services

An environmental consulting company (based in Vashi, Navi Mumbai, India) whose services include air dispersion modeling.
http://www.serenenviro.com/pro_ass.htm