City Cast Las Vegas logo

Citizen Smog Enforcers: Nevada Wants You to Snitch on Dirty Drivers

Posted on September 29, 2025   |   Updated on September 30, 2025
Rob Kachelriess

Rob Kachelriess

An exhaust pipe from a car.

Passing lanes … and passing judgment. (Khunkorn Laowisit/Pexels)

Ever see a car with a dark cloud of air pollution puffing out of the exhaust pipe? Well, the Nevada DMV wants you to report your fellow filthy neighbors to the proper authorities. We all want a cleaner community, but what’s more important — loyalty among Nevadans or the environment? 🤔

🌤️ Why Smog Is Such a Big Deal in Nevada

In the United States, air quality tends to be worse in Western cities due to high temperatures (which exacerbate smog), congested driving, and the interference of smoke from wildfires. The Las Vegas Valley currently ranks 12th on the list of most polluted cities, based on ozone quality.

🚌 Evolving Emissions

If you think things are bad now, air quality used to be much worse. Beginning with the Clean Air Act of 1970, regulations have evolved over time to improve emissions by factories, plants, construction equipment, and vehicles. Today, electric vehicles account for roughly 10% of the U.S. auto market and traditional gas-powered cars have made dramatic design improvements to be more environmentally friendly.

🔌 Plug In And Prove It

Cars in Nevada’s two largest counties — Clark and Washoe — require a smog test before annual registration renewals. There are some exceptions, including brand-new cars (up to the first four years), and hybrids (up to the first five years). Some older cars qualify for a classic vehicle exemption.

🫡 Citizen Enforcement

The DMV encourages the general public to report (or in colloquial terms, “tattle on”) drivers who appear to be emitting excessive pollutants. The program has been around for decades — formerly known as Smoking Vehicles (which actually sounds like a compliment) before it was rebranded Smog Spotters in 2014.

✍️ How It Works

It’s pretty simple. Take note of the suspected violator's license plate number and report it online or by calling 844-END-SMOG (844-363-7664) with any additional information — like make and model of the car, where it was seen, the date, etc. The DMV Compliance Enforcement Division sends an advisory letter to the owner of the suspect vehicle, who may be required to make repairs or bring the vehicle in for a lab inspection.

🤔 A Worthwhile Endeavor?

Smoking cars are an unhealthy nuisance, but isn’t it a police officer’s job to look out for this stuff? And in theory, the vehicle in question is within a year of facing a smog test to solve the problem anyway. Then again, emissions fraud is a real problem in Nevada, although new technology is making it easier to crack down on violators. It’s also worth noting that emissions standards are mandated by the EPA, making false tests a federal crime.

  • Between smog testing and registration fees, the cost of owning a car adds up fast in Nevada. Another big factor: the high cost of auto insurance. City Cast Las Vegas looks at why rates are so high in Nevada and what can be done to minimize your bill. [City Cast Las Vegas 🎧]

Share article

Hey Las Vegas

Stay connected to City Cast Las Vegas and get ready to join the local conversation.

Can't subscribe? Turn off your ad blocker and try again.

The latest in Las Vegas

Mayoral MondaysSeptember 28

Mayoral Races to Watch in Southern Nevada

Voters will help choose two new mayors in Southern Nevada. Who are the candidates and what do they stand for?

Poll workers in yellow shirts look over people voting in voting booths set up at a mall.
Las Vegas' BestSeptember 24

Celebrate Dolly Parton on 9 to 5 Day

Saturday is Sept. 25 or “9 to 5 Day,” which gives Las Vegas the perfect opportunity to celebrate the legacy of Dolly Parton.

Dolly Parton sings on a stage at Laughlin Event Center in 2016.
Keep It LocalSeptember 24

Meet Water Street’s Movers and Shakers

From Strip pastry chefs to local architects, discover the passionate people building their businesses and lives right here on Henderson's...

Architect Windom Kimsey stands at a bar at Public Works.
Keep It LocalSeptember 24

Your Water Street Micro-Neighborhood Guide

Discover how Henderson’s Water Street got its name from a 1942 wartime pipeline. Explore the historic district, local businesses, and par...

An open and light dining space with white chairs and tables, wood floors and a chandelier.
Keep It LocalSeptember 17

Your Guide to Las Vegas Butcher Shops

Explore Las Vegas' best butcher counters, from whole-animal butchery at Featherblade to Diamond Spur's ranch beef. Find dry-aged ribeye,...

A close up of a cheeseburger in a wrapper, showing the melted cheese, lettuce, tomatoes, pickles and meat.
Keep It LocalSeptember 17

Know Thy Meat: A Buying Guide with Chef Brad Wise

Master the meat counter with 5 expert tips from Brad Wise of Wise Ox. Plus, get a sneak peek at their new Las Vegas location and 2027 Ox...

A glass case showing cuts of meat.
Food & DrinkSeptember 14

5 Reasons for Locals to Brave the Strip This Week

This week is busy with culinary pop-ups, festival events, and a few discounts that even locals could love on the Strip.

A dining table filled with plates. A close-up shows a tartine with rolled slices of meat.
Keep It LocalSeptember 10

The Vegas Entrepreneur Giving Fan Gear a Makeover

From a Vegas hair agency to major sports licensing deals, discover how Whitney Bansin’s viral gold sequin jackets launched her fashion br...

Whitney Bansin.