Home › Methodology

How This Directory Is Built

Every listing is sourced, every verified badge is a registry cross-reference, and the gaps are disclosed. Here's the full method.

Sources

SourceWhat it providesVerification status
California CDPH Trauma Scene Waste Management Practitioners registry (public PDF)Company, city, phone, TSW registration numberVerified — official state registry
Florida DOH trauma scene cleanup provider list (public, county-organized)Company, county/city, phone, DOH IDVerified — official state list
Arizona ADEQ biohazardous medical waste transporter registryCompany, city, TR number (biohazard-cleanup subset only)Verified — official state registry
Franchise location rosters (companies' own public locator pages)Branch name, cityUnverified
Search-listing discovery (companies ranking organically for cleanup queries, cross-checked against their own websites)Company, website, service-area signal, phone where publishedUnverified

Rules we follow

What “verified” means — exactly

A verified badge means we found the company on the named official state registry on the date shown on its profile (currently July 2026 for all verified listings). It is a license cross-reference at a point in time — not an endorsement, not a quality rating, and not a guarantee the registration is still current when you read this. Confirm current status with the issuing agency before hiring.

Known gaps (we'd rather tell you)

Corrections: use the claim form — a human reads every submission.