Clean Truck Check in El Cajon, CA

Trucking activity in San Diego County

Clean Truck Check applies to heavy-duty vehicles that operate in California — including out-of-state trucks based here that run loads west.

Trucking establishments

936

Trucking employees

7,861

Source: FMCSA MCMIS carrier census, US Census County Business Patterns 2021.

Nearby truck stops

OpenStreetMap-tagged truck stops, services areas, and HGV-marked fuel stations within 25 miles of El Cajon. Useful for routing a service stop around your CTC test.

• Pilot Travel Center
  Pilot · HGV: yes · ~16 mi
  View on OpenStreetMap →
• Pilot
  1497 Piper Ranch Road, San Diego, CA 92154
  Pilot · HGV: yes · ~16 mi
  View on OpenStreetMap →

Source: © OpenStreetMap contributors. Last updated 2026-05-18.

Air quality context in and around El Cajon

Annual aggregate readings from EPA Air Quality System monitors within about 25 miles of El Cajon, reporting year 2025. Clean Truck Check exists to reduce real-world emissions from heavy-duty vehicles — the numbers below are the local baseline those rules are designed to improve.

PM2.5

9.88 Micrograms/cubic meter (LC)

9 monitors · 105,231 observations · 465 days above standard

Nitrogen dioxide (NO₂)

12.11 Parts per billion

9 monitors · 134,408 observations · 0 days above standard

Ozone (O₃)

0.05 Parts per million

7 monitors · 197,676 observations · 25 days above standard

Source: EPA Air Quality System (AQS) API. Reporting year 2025. Last fetched 2026-05-18.