Clean & Green

This is a logo for Centennial's Clean & Green web page


Keep Centennial Green!

Looking for a way to conserve water and energy? Want to know where you can take your cardboard for recycling, or how to dispose of hazardous waste like batteries or old paint? Researching ways to build green or renovate your home in an environmentally-friendly way? Recycling options in Centennial.

The City of Centennial has provided the following resources so that you can find information about conservation of resources and reduction of pollution.

Air Quality

Regional Air Quality Council - Serves as the lead air quality planning agency for the Denver metropolitan area

AIRNow - AIRNow for Air Quality Conditions and Forecasts

Simple Steps. Better Air (formerly Ozone Aware) - Lists simple steps for how to make a positive impact on Colorado’s air


Green Roofs for Healthy Cities - Explains a green roof system and lists benefits and design details

EPA WasteWise Building Challenge - Encourages organizations and businesses to achieve sustainability in their practices and reduce waste


Xcel Energy - Partners in Energy - a program from Xcel Energy that supports communities by helping to develop and implement energy plans

Learn about Centennial's Partners in Energy plan

Database of State Incentives for Renewables & Efficiency (DSIRE) - information on incentives and policies that support renewables and energy efficiency

Energy Star - credible, and unbiased information to help people to make well-informed decisions

National Renewable Energy Laboratory - researches the way the nation and the world use energy

Hazardous Waste

At Your Door Special Collection Service(PDF, 319KB) - Household Hazard Waste


EPA Recycle City - games and activities to help kids learn about recycling

EPA Student Center - lesson plans and project ideas for learning and teaching about the environment

National Institute of Environmental Health Sciences - educational materials about health, science, and the environment


Erase the Waste - Erase the Waste is a Colorado Department of Public Health & Environment (CDPHE) program that encourages people to recycle more in Colorado. Colorado’s recycling rate fell between 2018-2019 and is now just under 16% — less than half of the national average!

Wheels For Wishes - Wheels For Wishes picks up old and broken down vehicles, at no cost to owners, and recycles or auctions them to benefit Make-A-Wish Colorado

More Recycling Information - View additional resources for things like Christmas trees and electronics on our recycling page


Transit - Regional Transportation District

Bike to Work Day - Denver Regional Council of Governments (DRCOG)

Carpooling - DRCOG Way to Go

Walk to School Programs - Safe Routes to Schools

Xcel Energy Summer Conservation Tips 

Xcel Energy is offering some tips to help customers find relief from the heat and their bills this summer. Home cooling can account for about half of a summertime electric bill, and there are small changes customers can make in their day and evening routines to save money, including setting thermostats to 78 degrees or higher if your health allows, turning off unnecessary lights and postponing the use of major appliances until after 8 p.m.

Xcel Energy also offers a full selection of programs and rebates to help businesses save energy and money. See the options here: Smarter Energy Use for a Better Business

Additional summertime energy-saving tips include:

  • Using electric fans instead of air conditioning when practical.
  • Closing drapes and blinds to keep out direct sunlight during hot periods.
  • Avoiding using evaporative coolers or humidifiers at the same time an air conditioner is running.
  • Operating energy-intensive appliances, such as dishwashers, washing machines and dryers during early morning and late evening hours.
  • Limiting the opening and reopening of refrigerators, which are major users of electricity in most homes.
  • When possible, businesses should shift power-intensive work processes to morning or late evening hours.

Find more energy saving tips and resources online:

Xeriscape Gardening

Denver Water Xeriscape