- Arizona Department of Environmental Quality
Phoenix, AZ
- Arizona Department of Transportation
Phoenix, AZ
- Arizona Public Service Company
Phoenix, AZ
- Cathedral Bluff Shale Oil Company
Grand Junction, CO
- Desert Research Institute
Reno, NV
- Fort McDowell Yavapai Nation
Fort McDowell, AZ
- Maricopa County Environmental Services Department
Phoenix, AZ
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- Panda Energy International
Dallas, TX
- Pima County AQCD
Tucson, AZ
- Salt River Pima-Maricopa Indian Community
Scottsdale, AZ
- Salt River Project
Phoenix, AZ
- Sonoma Technology, Inc.
Petaluma, CA
- Tucson Electric Power Co.
Tucson, AZ
- Universal Propulsion Company
Phoenix, AZ
- USEPA Region IX
San Francisco, CA
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