Multnomah County emissions
This is the page type that compounds your search surface. Each county route can expose distinct rules, exemptions, cost, and stations.
Rule snapshot
Testing requiredYes
Gas vehiclesGas vehicles starting at 4 years old
Diesel vehiclesDiesel vehicles starting at 4 years old
Average test fee$25.00
Coverage statusPartial
Exemptions
- newer vehicles within the first four model years
- motorcycles
- vehicles outside the DEQ testing boundary
- certain diesel vehicles outside covered model-year and weight rules
Official DEQ stations
Oregon publishes Multnomah County DEQ testing coverage, but live station availability is delegated to the official DEQ locations pages.
Use the official station finder for the current station list.
Ready to act?
Open the official Multnomah County testing workflow
PlateHarbor mapped the main county testing rules and finder coverage. Use the official source or locator before you schedule a test or travel to a station.
Official station finder
Source freshness
This county page is rendered from backend data and can be refreshed independently of the frontend deploy.
Coverage status: Partial
Official source: https://www.oregon.gov/deq/vehicle-inspection/pages/default.aspx
Last synced: Mar 9, 2026, 2:36 PM UTC
Coverage note
Core Oregon DEQ coverage is source-backed, but DEQ testing depends on metro-area boundaries, fuel and model-year rules, and live station availability remains delegated to the official DEQ locations pages.
Use this county via API
This same county dataset is also available as JSON for search agents, LLM tools, and direct integrations.
Direct request example
curl https://api.plateharbor.com/api/v1/emissions/oregon/multnomah