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Emissions Reduction Incentive Grants (ERIG) Program

The ERIG program provides financial incentives to repower or replace older locomotive, marine, stationary equipment, or select non-road equipment to reduce NOx emissions in ozone nonattainment areas and affected counties in Texas.

A Program of the Texas Emissions Reduction Plan (TERP)

Currently Closed

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How to Apply

Applicants should review the following documents for detailed requirements for each project type and information about applicant eligibility:

Find the Emission Standard for the equipment being replaced or repowered using the table applicable to your equipment type:

Use the following resources to help determine the engine family code and federal emission standard for your equipment:

An applicant may request up to 80% of the incremental cost (total eligible cost) associated with the purchase or lease of the replacement equipment, not to exceed an incentive amount that results in a cost per ton (CPT) of NOx reduced as specified below:

  • Marine and Locomotive Projects: $20,000 CPT
  • Stationary Projects: $35,000 CPT
  • Non-Road Equipment Projects: $35,000 CPT

Applications will be scored and ranked based on the projected cost per ton of NOx reduced and the total projected NOx reductions. The grant estimators provided below will help you calculate the maximum grant amount, total tons of NOx reduced, and cost per ton of NOx reduced for your project.

Grant Estimators

Please note that the results of the grant estimator are only estimates and the final calculations for your project will be completed by TCEQ.

The methodology TCEQ uses to calculate a project’s total projected NOx reductions and projected cost per ton of NOx reduced may be found in the technical supplements below.

Technical Supplements

TCEQ requires applicants to complete the W-9 to certify their Taxpayer Identification Number (TIN). The W-9 Form must be submitted with the Application.

Applications and Required Attachments must be received by 5:00 p.m. CT, April 12, 2023.

Applications will be accepted for consideration during this grant period only if received by TCEQ via email at or via mail at one of TCEQ’s addresses, no later than 5:00 p.m. CT, April 12, 2023.

For applications submitted via email, each attachment must be grouped by activity and clearly labeled with the activity number at the top of each page. It is preferable that the application and attachments be submitted as a single PDF, but it is not required.

  • Submitting Applications via Email. If submitting an application via email to, please use the following naming convention for your application file in the subject line: ‘FY23 ERIG and [your legal name]’. Only one application may be submitted per email at a maximum file size of 25MB.
  • Submitting Applications via TCEQ’s FTPS Server. If your application is larger than 25MB, please submit by uploading the file to TCEQ’s file transfer protocol secure (FTPS) server. Enter as the email address. (Read how to use TCEQ’s FTPS server ). Please note: Applications uploaded to TCEQ’s FTPS server without completing the share file(s) step will not be considered as submitted. See detailed instructions on how to share files via TCEQ’s FTPS server.

Applications may also be submitted to one of these addresses:

Standard Mail:
Texas Commission on Environmental Quality
Air Grants Division, MC-204 (ERIG)
P.O. Box 13087
Austin, TX 78711-3087

Express Mail
Texas Commission on Environmental Quality
Air Grants Division, MC-204 (ERIG)
12100 Park 35 Circle
Building F, 1st Floor, Suite 1301
Austin, TX 78753

For questions on obtaining the Request for Grant Applications (RFGA), determining the eligibility of a project, or completing and submitting an application, please contact TERP staff at or 800-919-TERP (8377).