On the Road to Clean Air in The Mile-High City
Denver is home to the country’s second-oldest Clean Cities coalition, which draws on 20 years’ worth of expertise and partnerships to reduce petroleum use.

The City and County of Denver fleet was among the first in the country to incorporate hybrid-electric vehicles into its operations. Photo: Pat Corkery, NREL.
At the foot of the Rocky Mountains, some of the country’s most progressive fleets are leading the way in reducing petroleum use and vehicle emissions, reflecting a decades-long commitment to air quality and sustainability.
Denver Metro Clean Cities (DMCC), which includes dozens of fleets from the public and private sectors, is celebrating its 20th anniversary this year — a milestone it shares with the national Clean Cities program (See page 26). Launched in September 1993, the Denver coalition, now housed within the American Lung Association, is the country’s second-oldest Clean Cities coalition.
In 2011 alone, DMCC members saved 3.3 million gallons of petroleum through the use of alternative fuels, advanced vehicles, fuel-economy improvements, and idle-reduction measures.
“One of the things I’m most proud of is the extensive network we’ve built over the years,” said DMCC Coordinator Natalia Swalnick.
The City and County of Denver’s fleet is among the coalition’s pacesetters.
“It’s a model fleet with a very strong track record of sustainable transportation,” Swalnick said.
The fleet uses biodiesel and E-85 extensively, and was among the first in the country to incorporate hybrid vehicles into its operations. It takes advantage of the fuel-saving benefits of idle-reduction equipment on heavy-duty vehicles and anti-idling policies for all drivers. Now DMCC is helping the fleet with the development of a compressed natural gas (CNG) fueling station that will serve its refuse trucks.
DMCC is fostering connections between the Denver fleet and others in the area that could also use the station. Such partnerships will increase the volume of fuel dispensed by the station, thereby improving its return on investment.
Swalnick also assisted by providing sample RFPs for station development, which she obtained from her fellow Clean Cities coordinators in other locations.
"It was great to be able to capitalize on their expertise instead of having Denver start from scratch. There are no prizes for originality in the world of RFPs,” Swalnick said.
Get Involved With Clean Cities
Through the work of nearly 100 local coalitions, Clean Cities advances the nation’s economic, environmental, and energy security by reducing petroleum use in transportation. Clean Cities is an initiative of the U.S. Department of Energy. Find out more at www.cleancities.energy.gov.
For more information about the DMCC, e-mail Natalia Swalnick at nswalnick@lungcolorado.org or visit denvercleancities.org.
More Green Fleet

Inspiration Mobility Acquires Key Electrada Assets
Inspiration Mobility Group has acquired select assets of Electrada, adding the fleet electrification provider's team, technology, and charging infrastructure development capabilities to its energy management business.
Read More →
Turning Connected Vehicle Data Into Decisions That Matter
Fleet leaders have more data than ever, but turning that data into clear, actionable decisions remains a challenge. This white paper shows how leading organizations are using connected vehicle data to improve safety, reduce costs, and optimize fleet performance. Learn how to turn insight into action across your fleet.
Read More →Are You Tracking Your Fleet's True Total Cost of Ownership?
Bobit Business Media surveyed 190 fleet professionals and found that while most fleets are tracking costs, fragmented systems and data gaps are keeping true TCO visibility out of reach. With rising pressure to control spend in an increasingly volatile environment, the gap between what fleets think they know and what the data actually shows is wider than you might expect. See how your peers are managing costs today and where the industry still has room to improve.
Read More →
Hybrids: Electrification Without the Challenges
For fleet managers, fuel is one of the biggest line items in the budget — and it's one hybrids can shrink without changing how your people work. Download the eBook to see the numbers, understand the technology, and get a step-by-step guide to making the switch.
Read More →
Startup ZMD Motors Developing Electric Conversion for Ram 5500 Work Trucks
Detroit-based company says it has begun early development of a system to convert internal combustion Ram 5500 chassis-cab trucks to electric power.
Read More →
U.S. EV Adoption Is Climbing, but Commercial and Passenger Markets Diverge
New industry group data revealed that light-duty electric vehicle sales are hitting record market share and volumes, while commercial EV volume dipped. What’s driving the fluctuations?
Read More →
How To Upfit Electric Work Trucks and Vans
The biggest challenge lies in balancing additional equipment and accessories with EV battery capacity and range.
Read More →
How Fleets Can Adjust Approaches To EV Adoption
With the expiration of federal incentives, EV success now hinges less on government policy and more on discounts, battery tech progress, increased range, and broader infrastructure.
Read More →
Despite World Troubles, Forward Thinking Guides Fleets
Fleet operators shared their challenges during an annual conference that embraced the latest advances across all aspects of running private- and public-sector vehicles.
Read More →
GM Energy Details Partnerships and Targets for Public Charging Build-Out
EVgo, Pilot, ChargePoint and IONNA named; goal is 35k GM-invested DC stalls by 2030, with customer-experience upgrades at sites.
Read More →