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What is a Qualified Products List (QPL)?
Understanding QPLs, APLs, and how to get your products approved for government purchase
A Qualified Products List (QPL) — also called an Approved Products List (APL), Authorized Materials List (AML), or similar names depending on the state — is an official list maintained by a government agency of products that have been tested, evaluated, and approved for use on government projects.
If a state maintains a QPL for your product category, your product must be on that list before the state will purchase it. No exceptions. You can submit the lowest bid with the best product, but if it’s not on the QPL, your bid will be rejected.
Why QPLs Exist
Government agencies spend billions of taxpayer dollars on products each year. They need to ensure that every product they purchase meets minimum quality, safety, and performance requirements. QPLs solve this problem by:
- Pre-qualifying products before procurement — instead of testing products during every purchase, agencies test them once and add approved ones to the list
- Ensuring public safety — products used on highways, bridges, and public buildings must meet strict standards to protect lives
- Streamlining purchasing — buyers can quickly reference the QPL rather than evaluating each product from scratch
- Ensuring consistency — all vendors are held to the same testing and approval standards
- Protecting the agency legally — if a product fails, the agency can show it was on the approved list and met standards at time of purchase
QPL vs. APL vs. AML — Different Names, Same Concept
Different states use different names for their approved products lists. Don’t be confused — they all serve the same purpose:
- QPL — Qualified Products List (most common)
- APL — Approved Products List (FL, CO, HI, others)
- AML — Authorized/Approved Materials List (CA, LA)
- QCML — Qualified Construction Materials List (MA)
- LAM — List of Approved Materials (KY)
- MAL — Materials Approved List (NY, VA)
- MSG — Materials Source Guide (MI)
- MAPLE — Materials Approved Products List Environment (IA)
What Product Categories Typically Require QPL Approval?
Not every product sold to government needs to be on a QPL. QPLs are most common for products where safety, durability, and performance are critical:
Traffic & Highway
- Retroreflective sheeting for signs
- Pavement marking tape & paint
- Traffic cones, barrels, barriers
- Guardrails & crash attenuators
- Delineators & object markers
Construction
- Concrete admixtures & sealers
- Asphalt materials
- Geotextiles & erosion control
- Pipe & drainage products
- Bridge bearings & expansion joints
Electrical & ITS
- Traffic signals & controllers
- LED lighting
- ITS equipment (cameras, sensors)
- Conduit & wiring
- Solar-powered devices
How to Get Your Product on a QPL — Step by Step
- Identify which states maintain a QPL for your product category. Not all states have QPLs, and those that do may only cover specific categories. Visit our State QPL Directory for direct links to every state’s list.
- Download and study the state’s specifications. Each QPL is tied to specific standards (ASTM, AASHTO, etc.) that your product must meet. See our Standards guide and State DOT Specs Directory.
- Get your product tested by an accredited independent laboratory. Most states require testing by a lab accredited under ISO 17025, NVLAP, or A2LA. Self-certification is rarely accepted.
- Prepare your submission package. Typically includes: completed application form, product data sheets, independent test reports, manufacturer certifications, and sometimes physical samples.
- Submit to the state DOT’s materials division. Each state has its own submission process and contact. Check the state’s QPL page for instructions.
- Wait for review and approval. Processing times range from 30 days to 6+ months depending on the state and product complexity. Some states have a backlog.
- Maintain your listing. QPL approvals typically expire after 1-5 years and require renewal with updated test data. Some states require annual renewal.
Common QPL Questions
Do all states have QPLs?
Most states maintain some form of QPL/APL, but coverage varies widely. Some states have comprehensive lists covering hundreds of product categories, while others only maintain QPLs for a few high-priority categories like traffic devices and construction materials. A few states rely entirely on specification compliance without a formal pre-approved list.
If I’m on one state’s QPL, does that count for other states?
No. Each state maintains its own independent QPL. Being approved in Alabama does not make you approved in Georgia. However, the test reports you submit to one state can often be used for another state’s application, since most reference the same ASTM or AASHTO standards. This saves testing costs even though you need separate approvals.
Does QPL approval cost money?
The state application itself is usually free. However, the independent lab testing required to prove compliance can cost anywhere from a few hundred to several thousand dollars depending on the product and tests required. Budget for testing as a cost of doing business in government markets.
What if my product doesn’t need QPL approval?
Many products sold to government — office supplies, services, IT equipment, vehicles — do not require QPL approval. QPLs are primarily used for construction, highway, and safety products where failure could endanger public safety. If your product category isn’t on a state’s QPL, you can typically bid directly by demonstrating specification compliance in your bid response.
Related Guides
50-State QPL Directory | Understanding Standards | State DOT Specs | Getting Started Guide
Last updated: April 2026. Originally published by Staci Cole in 2010.