Denver may be one of the healthiest cities in the U.S., but when it comes to recycling, there's room for improvement.

A new report done by nonprofits CoPIRG and Eco-Cycle shows the city has a recycle rate of only 18 percent from from single-family homes and small apartments.

That's one of the worst rates in our state and among similar sized-cities, according to the report.

One of the problems is people aren't separating their waste correctly.

Harlin Savage showed us an example by looking at the contents of a dumpster in Denver's Capitol Hill neighborhood Monday.

"We find a lot of leaves. These should not be in the trash, these should be in the compost bin. This is perfect for compost," Savage said. "We're also finding there are bags full of aluminum cans -- aluminum cans go in the recycle bin."

Another problem, people living in in large multi-unit apartment buildings lack access to the most basic component of recycling, the purple recycling bin.

The report also listed the recycling rates for 10 cities comparable to Denver.

Fresno, California was the best with 71 percent.

Denver was last on the list.

You can view the full report here.