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COLORADO / INDEPENDENT LOCAL STATION GUIDE

Castle Rock, CO Emissions Testing

Castle Rock offers a gasoline facility on Topeka Way and licensed diesel entries on Castleton Road and 2nd Street. The diesel businesses have different documented duty capabilities.

Illustrative Colorado road beneath an open sky
AI-generated Colorado road illustration · not a Castle Rock station or verified local road

WITHIN THE LISTED CASTLE ROCK LOCALITY

Choose the right testing program.

1 gasoline / hybrid station · 2 licensed diesel businesses

Locations below use the official source locality, which can differ from municipal boundaries. A listing here does not establish that your vehicle needs a test. Start with your renewal notice and the official DMV requirements.

Gasoline options · Diesel options · Plan your trip · Nearby alternatives

Gasoline & hybrid testing in Castle Rock

Air Care Colorado does not test diesel vehicles. Review equipment restrictions and source freshness before setting out.

Licensed diesel testing in Castle Rock

Duty capability is sourced from the Colorado DMV. Hours, appointments, current availability and unverified vehicle restrictions should be checked by phone. Air Care queue estimates do not apply.

Excel Diesel and SUV: Light duty listed · Heavy duty listed. Contact station: 720-524-6221

H&M Transmission and Automotive: Light duty listed. Contact station: 303-663-5578

LOCAL CONTEXT / REVIEWED 2026-11-06

Plan an emissions testing trip in Castle Rock.

H&M Transmission and Automotive is listed for light-duty diesel testing. Excel Diesel and SUV is listed for light- and heavy-duty diesel testing; neither is the Air Care gasoline facility.

The official diesel directory contains a malformed ZIP for the Castleton Road entry. This guide preserves the street and unit but withholds that ZIP pending verification; use the named business and call if directions are unclear.

The cards distinguish the operator’s reported wait from ordinary hours and show the available source timestamp. An unavailable diesel wait is not zero, and a gasoline “Station Open” message is not a measured queue. Check directly before a near-closing trip; inspection time is additional to driving and waiting.

Each station page includes its source, verification date, phone and known vehicle capability. Google Maps and Apple Maps links use the public destination address. The finder can compare driving estimates after you choose a starting point; a city name alone is not your exact origin. Compare options around Castle Rock.

Nearby alternatives outside Castle Rock

These are outside the listed Castle Rock locality. Distances are approximate straight-line measurements from the nearest listed Castle Rock station with a sourced position, not from your home or a city-center boundary. Census address-range positions are approximate; distances are not driving miles or drive times.

Sources and verification

Station facts come from Air Care Colorado’s location listing and the Colorado DMV licensed diesel directory. Equipment guidance comes from Air Care’s restrictions. This independent guide does not own the stations or determine eligibility.