New AERMOD on the way!

Posted by on Friday, July 14th, 2023 in Newsletters

What’s Happening Now

EPA News

2023 Region/State/Local (RSL) Modelers Workshop – EPA has released the presentations from this year’s RSL workshop.  You can find them here.

Speaking of things discussed at the RSL workshop….

*HOT* New version of AERMOD coming soon! – US EPA has announced that the next version of AERMOD will be designated 23132.  This palindromic designation will be in honor of Roger Brode, former Mr. AERMOD at EPA, who recently passed away after retiring from the agency in 2021.  (Julian Day 132 is May 12, which was Roger’s birthday).  EPA has indicated that the release will definitely occur before the 13th Conference on Air Quality Models – hopefully, well before then.  As always, as soon as EPA releases a version of AERMOD, we will incorporate it into BEEST ASAP!

13th Conference on Air Quality Models – Save the date! EPA’s triennial Conference on Air Quality Models will be held November 14‑15, 2023. This WILL be a public conference and EPA will be soliciting comments on proposed changes to modeling guidance and tools. As with previous conferences, this one will be held at EPA offices in Research Triangle Park, NC. Keep watching here and on SCRAM for details as they emerge.

Conferences and Workshops

Many thanks to all of you who helped make AWMA’s 2023 Annual Conference and Exhibition (ACE) in Orlando a resounding success. We hope to see you all again June 24-27 at the TELLUS Convention Centre in Calgary for ACE 2024! In the meantime, here’s a list of upcoming local AWMA meetings.

RTP Chapter August Lunch Presentation: Compliance
August 15, 2023 • Raleigh, NC / online

Arrowhead Environmental Conference (Upper Midwest Section and SWANA MN Chapter)
October 3, 2023 • Proctor, MN

Pacific Northwest International Section Annual Conference
October 25-27, 2023 • Suquamish, WA

Louisiana Section Annual Conference
October 25-26, 2023 • Baton Rouge, LA

Rocky Mountain States Section Air Quality Conference
November 2, 2023 • Golden, CO

If your company, organization, agency, state, etc. has an upcoming modeling or air quality-related event and you’d like it publicized in Providence/Oris Notes, please send that information to us at, and we’ll be happy to include it.

Providence Products

Simply the best!


BEEST 12.09 is out and includes the following:

  • Incorporates AERMOD 22112 executable
  • AerMet GUI has been updated to run AERMET 22112

BEEST 12.10 will be out soon and will include these new features:

  • Support for new AERMOD 22112 alpha keywords SWPOINT, RLINEXT and PLATFORM
  • AerMinute GUI will include download access to the new 1-minute ASOS data site (National Center for Environmental Information or NCEI website – as was discussed in October 2022 Providence/Oris Notes)
  • We’ve added the ability to add receptors along an Other line (like a road or railroad)
  • We’ve also included an updated WindRose utility

And, as we mentioned above, we’ll be updating BEEST to incorporate AERMOD 23132 after it is released by EPA.

As always, users in maintenance can download the most recent version of BEEST from

Go BEEST Mode! We still have plenty of Go BEEST Mode t‑shirts! You can request one of those by emailing us at

AerScreen for Windows

AerScreen for Windows 4.03 is now out. This update has the following enhancements:

  • Runs AERMOD 22112
  • Includes the latest version of Terrain Files Converter

Also, when EPA releases AERMOD 23132, we will incorporate it into AerScreen for Windows.

Users in maintenance can download the most recent version of AerScreen for Windows from


AERMOD Wizard 1.08 is now out. This update has the following enhancements:

  • Ability to download ambient monitoring data posted through June 2022
  • New label display option for NEI sources
  • Incorporation of AERMET 22112
  • Download raw meteorological and ambient data from Alaska and Hawaii; and
  • Export on-screen NEI sources, meteorological stations, and ambient monitoring stations to Google Earth!

AERMOD Wizard 1.09 will be out soon and will include these updates:

  • Ability to export Class I areas and Class I area receptors to Google Earth
  • Ability to download ASOS data from the new NCEI website and
  • Inclusion of the 2020 National Emissions Inventory (NEI) data set

Users in maintenance can download the most recent version of AERMOD Wizard from from

We’re off to use the Wizard!

Don’t forget – our FREE KMZ file for monitoring stations and 2019-2021 pollutant design values is still available at

If you have suggestions for enhancements to any of our modeling software products, please let us know and we’ll do our best to incorporate them into the software.

Providence Training

Modeling skills ready for an upgrade? We can help!

We want to note that many folks use our classes as credit toward professional engineer continuing education requirements. Check with your state’s licensing board or the National Society of Professional Engineers (see here or here) for more information on what is required.

Essential Air Permitting

Providence’s next Essential Air Permitting class will be held Monday, August 14, 2023, and will be online. This class it tailored to those folks who are new to air permitting or perhaps new environmental managers who need a good overview of the basic issues related to air permitting. Topics such as statutes, applicability, netting, emission calculations, and Title V are just some of the areas that are covered. !

To register for Essential Air Permitting, click here.

AERMOD Modeling for Permits

Our next AERMOD Modeling for Permits class will be August 22-23, 2023 and will be online. If you want to get started in modeling, then this class is for you!

To register for AERMOD Modeling for Permits, click here.

Advanced AERMOD

Our next Advanced AERMOD class will be August 24-25, 2023 and will also be online.

Advanced AERMOD covers topics that are near and dear to modelers, such as:

  • NAAQS modeling for 1-hour NO2, 1-hour SO2 and 24-hour PM2.5 (including MaxDCont Viewer)
  • Culpability determination
  • Background concentrations
  • Emission scalars and hourly emission rate files
  • Changes in terrain data processing
  • AERMOD Wizard and its uses

To register for Advanced AERMOD, click here.

Just as a reminder, if you register more than 30 days before your AERMOD class(es), you will receive a $100 discount on the course fee (per class, per registrant).

On-demand Meteorological Data Processing webinar

We are planning to launch a new training option – on-demand webinars. The first of these to be released will be “Meteorological Data Processing for AERMOD”.  Look for it at coming soon.

On-demand AERSCREEN webinar

We will be releasing an on-demand training webinar for AERSCREEN.  Watch this space for details!

Don’t forget, if our schedule of classes doesn’t mesh with your schedule, or if you have several people that need to be trained at once, contact us about setting up your own onsite or online class.

2023 Class Dates

The remainder of our 2023 class dates are:

AERMOD Modeling for Permits
August 22-23, 2023
December 12-13, 2023

Advanced AERMOD
August 24-25, 2023
December 14-15, 2023

Providence Services


Our BeestXpress modeling server was replaced in 2022 and now runs faster than ever before!

If you’ve never used our super-fast BeestXpress before, now is the time. Feel free to use our on-demand webinar that steps you through the process of setting up an account and sending off your first BeestXpress run. You can view the webinar here. New BeestXpress users can complete their first run absolutely FREE. Instructions about receiving the free run are given at the end of the webinar. Beyond the starter run BeestXpress will give you a per-run cost estimate before you begin. If you need help budgeting for BeestXpress, contact us for additional daily rate pricing options.

BeestXpress users have some great system enhancements to work with:

  • The “Job Details” webpage now displays the pollutant being modeled
  • The “Job Details” webpage now displays run progress for MAXDCONT calculations
  • Modeling runs with multiple partitions now include a combined AERMOD input file (*.DTA) in the output .ZIP file
  • Added an option to the “Submit Job” webpage that affects modeling runs with multiple partitions: the intermediate output files created by each partition can be omitted from the output .ZIP file
  • The “Job Search” webpage now includes the option to search by project number
  • Users have access to up to 99 partitions per AERMOD run

To date, BeestXpress has processed over 500,000 AERMOD runs.

BeestXpress users can log on at to take advantage of our AERMOD “force multiplier”. That AERMOD run that might have taken a day or two to process on your desktop computer can finish in an hour or less on BeestXpress. When time is money, BeestXpress is the best modeling return on investment there is!

Meteorological Data Processing Services

Do you need AERMOD-ready meteorological data? If so, we can help! Whether it’s running national weather service data or onsite monitor met data through the AERMET/AERMINUTE system, Providence has the background, know-how, and experience to have your data processed and ready for you ASAP. If you’d like more information, contact us at or

Consulting Solutions

One thing that we’re very proud of is the depth and range of our modeling experience and expertise. The kinds of air quality models we’ve used include all types, ranging from simple screening tools like SCREEN and AERSCREEN to plume models like ISC and AERMOD. The types of analyses include basic Significant Impact Level, NAAQS, PSD increment consumption, Class I analyses, air toxics and SIP attainment demonstrations. So, we’ve seen it all. To that end, should you or your clients need additional modeling assistance or just a second set of eyes to QA or peer review your modeling (ranging from initial protocol up to final submission), we stand ready to help. Feel free to contact us at 512‑258‑8855, 828‑628‑0634 or


August 14, 2023
Essential Air Permitting

August 15, 2023
RTP Chapter August Lunch Presentation: Compliance
Raleigh, NC / online

August 22-23, 2023
AERMOD Modeling for Permits

August 24-25, 2023
Advanced AERMOD

October 3, 2023
Arrowhead Environmental Conference
Proctor, MN

October 25-27, 2023
Pacific Northwest International Section Annual Conference
Suquamish, WA

October 25-24, 2023
AWMA Louisiana Section Annual Conference
Baton Rouge, LA

November 2, 2023
Rocky Mountain States Section Air Quality Conference
Golden, CO

November 14-15, 2023
EPA 13th Conference on Air Quality Models
Research Triangle Park, NC

December 12-13, 2023
AERMOD Modeling for Permits

December 14-15, 2023
Advanced AERMOD