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Center for Pima Basin Sustainability (CPBS)

  1. Conserve 2 Enhance
  2. Dispose A Med

The Center for Pima Basin Sustainability (CPBS) serves as the fiscal umbrella and Board of Directors for these programs.

The CPBS identifies, promotes and supports sustainable technologies, infrastructure and processes for southern Arizona. Governed by an independent board of directors and working with Pima Association of Governments, the center provides staff support and other resources to assist its focus areas of environment, energy and transportation. The center’s mission is complementary to PAG’s Sustainable Environment Programs including Rideshare, Clean Cities, Water and Air. 

CPBS was established as a 501(c)3 as a means for the center's aligned entities to seek tax-deductible donations. View the link below for the structure of the CPBS.

Conserve 2 Enhance

Save Water, Save Rivers, Build Community

Tucson Conserve2EnhanceTM connects water conservation efforts to environmental benefits through community action. When you conserve water, you can turn your savings into C2E donations to help fund community grants that further enhance our urban waterways and wildlife habitats.

C2E is guided by the C2E Advisory Board whose key partners include Sonoran Institute, the University of Arizona Water Resources Research Center, Pima Association of Governments and Tucson Water.

Become a C2E Business Partner

Align your conservation goals with a community investment:

  • Lead by investing in a vibrant landscape and engaged community
  • Receive a free water audit, be guided through rebate programs, learn water conservation tips that best fit your site, and view your water savings impact through the C2E website (a private and automated tracker)
  • Save money and impact your bottom line and our region's economic vitality
  • Gain regionwide exposure for your business across the Tucson region
  • Show customers you care for our local environment and reach new audiences

To learn more or to become a business partner, call (520) 495-1429 or visit:

This voluntary, donation-based program is a means to fund environmental enhancement projects in water department service areas in the region. C2E offers water use databases, grant reviews, restoration site implementation and participant newsletters. Currently, C2E pans much of the Pima County Wastewater Service area and all of the Tucson Water Service area, which cross into portions of every PAG member jurisdiction.  

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Dispose A Med

Protect your children, seniors, pets and wildlife through proper disposal of your unused medications

Proper pharmaceutical disposal is vital to public health and the environment. When medications are thrown in the trash without following proper disposal methods, they can be found and consumed by children, other people, pets or wildlife.

If they are washed down the sink drain or flushed down the toilet, the medications also contaminate our wastewater. Since medications are produced from an ever-changing array of complex chemicals, current technology does not allow wastewater treatment facilities to remove all these chemical wastes from effluent. Treated effluent is released into rivers and washes, where it can infiltrate soil and groundwater. The effluent can carry pharaceutical residue with it.

Safe Disposal Methods

As a partner of Pima County’s Dispose-A-Med program, Pima Association of Governments supports pharmaceutical take-back events throughout the county. Pima County’s Dispose A Med program allows law enforcement and local organizations to team up and collect unused or expired pharmaceuticals from the public through prescription drug take-back events. For more information about disposal events and locations near you and step-by-step information about proper disposal of medications, please visit Dispose-A-Med.

If you are unable to attend a take-back event and you urgently need to dispose of medications, it is possible to throw them in the trash without risking the health of children, pets or others. Be sure to follow these steps:

  • Pour pills or liquid medication into a water-tight, opaque container, such as an empty margarine tub.
  • For pills, add enough warm water to partially dissolve them and form a paste. For liquid medications, you may skip this step.
  • Mix in used coffee grounds, kitty litter, soil, or another undesirable substance.
  • Place a lid on the container, seal it with packing or duct tape, bag it and throw it in the trash.
  • Before disposing of prescription bottles, be sure to remove and destroy all labels to avoid identity theft.

Long-Term Health Care Facilities

Many patients in long-term health care facilities (nursing homes, hospice care, etc.) have numerous prescriptions. For information about pharmaceutical waste disposal in healthcare facilities, visit Practice Greenhealth.


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