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How We Collect and Update Texas Mold License Data
Last updated October 2026. Independent site, not affiliated with TDLR.
Summary: Our directory is a copy of TDLR's public mold license files. Once a week an automated job downloads four TDLR files, keeps current licenses with a Texas address, and replaces our previous copy. We don't edit license details by hand. Because our copy can lag behind TDLR, always confirm a license on TDLR License Search before you hire.
Where the Data Comes From
The Texas Department of Licensing and Regulation (TDLR) licenses mold assessors and remediators and publishes downloadable license files for each license type. We use four of these public CSV files:
| TDLR file | License type | Prefix | Holder |
|---|---|---|---|
| vsMoldRemediationContractor.csv | Mold Remediation Contractor | MRC | Individual |
| vsMoldRemediationCompany.csv | Mold Remediation Company | RCO | Business |
| vsMoldAssessmentConsultant.csv | Mold Assessment Consultant | MAC | Individual |
| vsMoldAssessmentCompany.csv | Mold Assessment Company | ACO | Business |
Each file lists the license number, license type, license status, licensee name, expiration date, and TDLR's address and county for the license holder. TDLR also publishes a statewide “TDLR – All Licenses” dataset on the Texas Open Data Portal. We use the mold-specific files above because they map directly to the mold license types.
How We Process It
- Download the four TDLR files listed above.
- Filter to records with a license status of CURRENT and a Texas (TX) address. Expired licenses and out-of-state addresses are left out.
- Match to a county using the county TDLR lists for the license holder. That's how licenses appear on our county and city pages. A license holder may serve areas outside the county on their TDLR record.
- Replace our previous copy in full, so licenses TDLR no longer lists as current drop off at the next refresh.
We don't add, remove, or edit license numbers, names, statuses, or expiration dates by hand. If a field looks wrong in our directory, it either came that way from TDLR or changed at TDLR after our last refresh.
Update Schedule: What “Verified Weekly” Means
Some pages say license data is “verified weekly” or “refreshed weekly.” In practice, that means:
- An automated job runs once a week (scheduled for late Saturday night, Central Time) and re-imports the TDLR files.
- Directory, county, and city pages are cached and may take up to about a day after an import to show the new data.
- TDLR updates its own files on its own schedule. Any delay at TDLR carries through to us.
- “Verified” means each listing matched a current TDLR record at our last import. It does not mean we contacted the contractor, inspected their work, or checked insurance.
- If an import fails, the previous week's data stays up until the next successful run.
All told, a listing can be up to roughly a week or more behind TDLR. That's why every page tells you to confirm on TDLR. Our step-by-step verification guide shows how.
Why Our Counts Differ from Other Sites
The totals on our directory (for example “X Remediation Contractors”) count license records in the four types above. Keep these points in mind when comparing numbers:
- Individuals and companies are counted separately. One business can show up as a Mold Remediation Company (RCO) and again through its licensed Mold Remediation Contractor (MRC). Our total is not a count of distinct businesses.
- Assessors and remediators are separate groups. Texas generally bars the same license holder from doing both the assessment and the remediation on one project, so we keep them apart.
- We leave out worker and technician registrations. TDLR also licenses or registers Mold Remediation Workers (MRW), Mold Assessment Technicians (MAT), mold analysis laboratories, and training providers. Worker registrations far outnumber contractor licenses. Some sites quote totals that include workers, which makes their “licensed mold pros” figure much larger. But a homeowner can't hire a registered worker to run a remediation job on their own, so we don't list them.
- Current, Texas-address records only. Counts that include expired or out-of-state licenses will be higher than ours.
Featured Listings Are Separate from License Data
Featured contractors on county and city pages come from businesses that applied to be featured, not from the TDLR import. Featured placement doesn't change anyone's license data or directory ranking. Phone calls-to-action may connect you with a listed or partner business. See the disclosure on our About page.
How to Report a Correction
License status, name, or expiration date
TDLR is the source of record, so license details have to be corrected at TDLR. Check the record on TDLR License Search. If TDLR is wrong, contact TDLR Customer Service (800-803-9202) or see the TDLR mold program page. Once TDLR's public files reflect the fix, our directory picks it up at the next weekly refresh. To report suspected unlicensed mold work, use TDLR's complaint process.
Errors in our guides or pages
If our explanation of a law, a link, or another non-license detail is wrong, call (512) 522-6796 and tell us the page and the issue. We review reported errors against primary sources and update the page when a fix is warranted. See our editorial policy.
Licensed contractors
If you hold a current TDLR mold license and want a featured listing, use the get listed form. Your basic directory record comes from TDLR automatically, so you don't need to apply to appear in the directory.