Mercer 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 6 years old • model year 1996 or newer
Diesel vehiclesDiesel vehicles starting at 6 years old • model year 1997 or newer • up to 8,500 pounds GVWR
Average test feeVaries
Coverage statusPartial
Exemptions
- gasoline vehicles under five model years old
- gasoline vehicles model year 1995 and older
- diesel vehicles model year 1996 and older or over 8,500 pounds GVWR
- electric vehicles
- motorcycles
Official inspection resources
New Jersey inspection rules apply statewide, and current Mercer County station availability is delegated to the official MVC inspection resources.
Use the official station finder for the current station list.
Ready to act?
Open the official Mercer 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.nj.gov/mvc/inspection/inspecthow.htm
Last synced: Mar 9, 2026, 7:22 PM UTC
Coverage note
Rule thresholds are source-backed, but current station coverage is delegated to an official live finder rather than a normalized station list.
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/new-jersey/mercer