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Guidance for Bidders

Vendors interested in submitting products for inclusion on the Qualified Product List (QPL) need to first have the products tested by an independent laboratory. See the product sample checklist and testing protocols below for guidance on the information to include in the product submittal.

Product Sample Checklist for Bidders


The mission of PNS is to “strive to serve the traveling public by evaluating and establishing specifications for products used in winter maintenance that emphasize safety, environmental preservation, infrastructure protection, cost-effectiveness and performance.”

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Chemical Products Specifications and Test Protocols


(New) QPL Listing

QPL Update

Category 4 Product

Chemical Product 4 Category Update