Diesel EmissioN Compliance Services
Helping your fleet stay road legal in California
What we do
Your one-stop partner
for compliance and testing
Zero Emissions Partners (ZEP) supports fleet operators across California by providing fast, accurate testing and reporting to meet diesel emissions regulations. We help prevent costly fines, unexpected downtime, and compliance errors.
Clean Truck Check program compliance
Our services include CTC-VIS database management along with easy to read compliance scheduling and documentation access through our proprietary Client Dashboard and mobile app. This complements our field testing services or helps you manage the program with transparency and visibility.
Mobile OBD & opacity testing
Our team performs on-site OBD and opacity tests, including visual inspections, using CARB-certified testers. Mobile testing keeps your fleet running while we take care of the compliance work.
Regulatory compliance audits
We audit both on-road and off-road fleets to uncover and fix compliance gaps before they become violations. Let us review your records to flag issues early.
On-demand compliance support
Facing a CARB inspection or document request? We’re available with expert guidance and quick responses when you need it most.
Why choose us
Supporting California’s
commercial fleet operators
ZEP helps fleet operators across Southern California meet strict diesel emissions regulations with fast, accurate testing and reporting — so you can avoid fines, downtime, and costly mistakes.
30+ years of experience
Our history in California’s Smog Check Program dates back to the 1990s. That legacy gives us the knowledge and hands-on understanding to meet today’s emissions challenges.
Trusted by fleets big and small
We serve everyone—from small business operators to Fortune 500 companies—delivering the same level of commitment and reliability.
Fast, clear, and responsive
We deliver results quickly, communicate clearly, and adapt to your workflow. Compliance doesn’t have to be confusing or slow.
Get in touch
We’re here to help
with your compliance needs
Call (888) 858-5426 or fill out our online form to schedule a consultation. Whether you need a one-time service or full compliance management, we’ve got you covered.
Find us in
Los Angeles
23273 Ventura Blvd Suite B, Woodland Hills, CA 91364
Get directions →
Diesel Emission Compliance Services
SOCIAL
©2025 Zero Emissions Partners. All rights reserved.
Diesel EmissioN Compliance Services
Helping your fleet stay road legal in California
Clean Truck Check program compliance
Our services include CTC-VIS database management along with easy to read compliance scheduling and documentation access through our proprietary Client Dashboard and mobile app. This complements our field testing services or helps you manage the program with transparency and visibility.
Regulatory compliance audits
We audit both on-road and off-road fleets to uncover and fix compliance gaps before they become violations. Let us review your records to flag issues early.
Mobile OBD & opacity testing
Our team performs on-site OBD and opacity tests, including visual inspections, using CARB-certified testers. Mobile testing keeps your fleet running while we take care of the compliance work.
On-demand compliance support
Facing a CARB inspection or document request? We’re available with expert guidance and quick responses when you need it most.
What we do
Your one-stop partner
for compliance and testing
Zero Emissions Partners (ZEP) supports fleet operators across California by providing fast, accurate testing and reporting to meet diesel emissions regulations. We help prevent costly fines, unexpected downtime, and compliance errors.
Why choose us
Supporting California’s
commercial fleet operators
ZEP helps fleet operators across Southern California meet strict diesel emissions regulations with fast, accurate testing and reporting — so you can avoid fines, downtime, and costly mistakes.
30+ years of experience
Our history in California’s Smog Check Program dates back to the 1990s. That legacy gives us the knowledge and hands-on understanding to meet today’s emissions challenges.
Trusted by fleets big and small
We serve everyone—from small business operators to Fortune 500 companies—delivering the same level of commitment and reliability.
Fast, clear, and responsive
We deliver results quickly, communicate clearly, and adapt to your workflow. Compliance doesn’t have to be confusing or slow.
Get in touch
We’re here to help
with your compliance needs
Call (888) 858-5426 or fill out our online form to schedule a consultation. Whether you need a one-time service or full compliance management, we’ve got you covered.
Find us in
Los Angeles
23273 Ventura Blvd Suite B, Woodland Hills, CA 91364
Get directions →
Diesel Emission Compliance Services
©2025 Zero Emissions Partners. All rights reserved.
SOCIAL
Diesel EmissioN Compliance Services
Helping your fleet stay road legal in California
Clean Truck Check program compliance
Our services include CTC-VIS database management along with easy to read compliance scheduling and documentation access through our proprietary Client Dashboard and mobile app. This complements our field testing services or helps you manage the program with transparency and visibility.
Regulatory compliance audits
We audit both on-road and off-road fleets to uncover and fix compliance gaps before they become violations. Let us review your records to flag issues early.
Mobile OBD & opacity testing
Our team performs on-site OBD and opacity tests, including visual inspections, using CARB-certified testers. Mobile testing keeps your fleet running while we take care of the compliance work.
On-demand compliance support
Facing a CARB inspection or document request? We’re available with expert guidance and quick responses when you need it most.
What we do
Your one-stop partner
for compliance and testing
Zero Emissions Partners (ZEP) supports fleet operators across California by providing fast, accurate testing and reporting to meet diesel emissions regulations. We help prevent costly fines, unexpected downtime, and compliance errors.
Why choose us
Decades of experience. Family roots. Personalized support.
ZEP blends deep industry roots with forward-thinking service. We make it easy for California fleets to stay compliant without the headaches.
30+ years of experience
Our history in California’s Smog Check Program dates back to the 1990s. That legacy gives us the knowledge and hands-on understanding to meet today’s emissions challenges.
Trusted by fleets big and small
We serve everyone—from small business operators to Fortune 500 companies—delivering the same level of commitment and reliability.
Fast, clear, and responsive
We deliver results quickly, communicate clearly, and adapt to your workflow. Compliance doesn’t have to be confusing or slow.
Get in touch
We’re here to help
with your compliance needs
Call (888) 858-5426 or fill out our online form to schedule a consultation. Whether you need a one-time service or full compliance management, we’ve got you covered.
Find us in
Los Angeles
23273 Ventura Blvd Suite B, Woodland Hills, CA 91364
Get directions →
Diesel Emission Compliance Services
©2025 Zero Emissions Partners. All rights reserved.
SOCIAL