Lakes Environmental Newsletter
Lakes Software Monthly Newsletter


Monthly Newsletter - June 2022

A&WMA Annual Conference and Exhibition

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We will be in San Francisco from June 27-30, 2022, for the Annual Air & Waste Management Association Conference and Exhibition.

Lakes Environmental is proud to be both a sponsor and exhibitor of the conference! Drop by booth #304 to meet our friendly, knowledgeable staff and learn about our new software solutions including the SaaS Emissions Inventory Application. While you are there, drop off a business card to register for your chance to win a FREE copy of our AERMOD View air dispersion modeling software!

Visit the conference website to register for this annual event.

AERMOD Campaign

Online AERMOD Course – August 23-24, 2022

AERMOD header

Don’t miss out on our next available 2-day online AERMOD course taking place on August 23 and 24, 2022 from 8:30am to 5:00pm (Central Time – Dallas, USA).

Register today before space is gone!

Note: Due to the immense popularity of our online courses and small class sizes, we recommend registering and making payment as soon as possible.


AERMOD (August 23-24, 2022)



In-Person AERMOD Training Course in Dallas, Texas – Sep 20-21, 2022

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Our first in-person training course in two years will take place this fall! Join us for 2 days of AERMOD training in Dallas from September 20 to 21, 2022.

This course will include a special 1-Hour NO2 NAAQS case study and a WRF case study for each student’s desired location. Additionally, learn about the soon to be released AERMOD update from the U.S. EPA.

Early registration discounts are available only until August 19, 2022. Register Today!


AERMOD (September 20-21, 2022)



Ends August 19, 2022


Dallas, TX


Just Announced – New Online AERMOD and CALPUFF Courses!

AERMOD header

We’re pleased to announce the following upcoming Online AERMOD and CALPUFF Air Dispersion Modeling Courses. Join us for world class training from the convenience of your own home or office with our senior level air quality experts!

CALPUFF: Sep 27-28, 2022

AERMOD: Oct 18-19, 2022

AERMOD: Nov 15-16, 2022

AERMOD: Dec 13-14, 2022

Online registration is available now. Our online courses sell out quickly! We recommend registering and making payment as soon as possible.

Lakes Environmental Closed for Canada Day Holiday

Lakes Environmental's offices will be closed on Friday, July 1, 2022, to observe the Canada Day holiday. If you have any needs during that time, please e-mail us at and we will contact you on Monday, July 4, 2022, when our offices reopen.


2022 Course Schedule

Aug 23-24, 2022
Register →

In-Person AERMOD
Sep 20-21, 2022 - Dallas, TX
Register →

Oct 18-19, 2022
Register →

Nov 15-16, 2022
Register →

Dec 13-14, 2022
Register →

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Parameter Limits in CALPUFF

The CALPUFF modeling system is very sophisticated and supports a wide range of modeling scenarios. One limitation of the system is that there are finite numbers of objects that can be specified on the model input parameters. For example, CALPUFF can only accept a finite number of sources of each type in a single model run.

Each executable (e.g., CALMET, CALPUFF, CALPOST) has a corresponding parameterization file which defines these limits. Lakes Software’s CALPUFF View formats these files into an easy-to-read table to aid users in finding these limits. To find the tables:

  1. From the File menu, select Preferences
  2. Under the EPA Models/Limits heading, go to Model Version. Choose between the following options:
    1. EPA Approved Version (CALMET/CALPUFF 5.8.5, CALPOST 6.221),
    2. Version 6 (CALMET 6.4.0 – CALPUFF 6.42 – CALPOST 6.292),
    3. Version 7 (CALMET 6.5.0 – CALPUFF 7.2.1 – CALPOST 7.1.0), or
    4. Version 7.3 Beta (CALMET 6.5.0 – CALPUFF 7.3.2 – CALPOST 7.2.0)
  3. Next, choose the executable of interest: CALMET, CALPUFF, or CALPOST

    Modeling Tip picture

  4. The Parameters List will be shown in the table. The screenshot below shows some of the parameters for CALPUFF Version 7.2.1.

    Modeling Tip picture

If you have a project where one of your parameters exceeds the model limit, you may need to develop a workaround. This may include:

  • Recompiling the model executables in FORTRAN to accept higher limits
  • Building multiple projects and utilizing CALSUM to combine results together

For users who choose to recompile the model themselves, CALPUFF View can also identify user-specified model executables and parameter files. Select the User-Specified radio button and select the Open icon to identify the location of your custom Executable and corresponding Parameters File.

Modeling Tip picture



Harder Winters, Stronger Storms

May 31, 2022 - About 30 massive, intricate computer networks serve the scientists who stand at the forefront of climate change research. Each network runs a software program comprised of millions of lines of code. These programs are computational models that combine the myriads of physical, chemical and biological phenomena that together form the climate of our planet.

Read more →

Fjords Emit as Much Methane as All the Deep Oceans Globally

May 30, 2022 - During heavy storms, the normally stratified layers of water in ocean fjords get mixed, which leads to oxygenation of the fjord floor. But these storm events also result in a spike in methane emissions from fjords to the atmosphere.

Read more →

Additional Environmental News

Visit the Environmental News Network (ENN), the most dependable online environmental news source!



2022 Conference Schedule

Air & Waste Management Association’s 115th Annual Conference & Exhibition
June 27-30, 2022 | San Francisco, CA | Booth #304

Learn more →

Guideline on Air Quality Models – Developing the Future
September 13-15, 2022 | Durham, North Carolina

Learn more →

Air & Waste Management Association Ontario Section’s 2022 Next Generation Ambient Air Monitoring Conference
September 13-14, 2022 | London, ON

Learn more →


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