Formation & Governance
- Year Formed: 1970’s
- Leadership: Chair annual rotation
- Formal Memorandum of Understanding: Verbal agreement
Participants
- State PHLs: CT, MA, ME, NH, NY NY (PHL, AG), RI, VT (PHL, AG, ​CHEM), NJ
- Environmental & Agricultural: NY, VT
- Local PHLs: ​New York City (NY)
Formation & Governance
- Year Formed: 2006
- Leadership: Led by Montana
- Formal Memorandum of Understanding: ​Yes
Participants
- State PHLs: MT, ND, SD, WY, ID
Formation & Governance
- Year Formed: 2015
- Leadership: Rotating chair
- Formal Memorandum of Understanding: Yes
Participants
- State PHLs: ​AL, FL, GA, KY, LA, MS, NC, SC, TN
- Local PHLs: ​Louisville (KY), Knoxville (TN)
- US Territories: Puerto Rico
Formation & Governance
- Year Formed: 2017
- Leadership: Chair, monthly rotation
- Formal Memorandum of Understanding: No
Participants
- State PHLs: DE, DC, OH, PA (PHL, EH), VA, WV
- Environnemental:  ​PA
- Local PHLs: Allegheny County (PA), Dayton ​/ Montgomery​ County (OH), Philadelphia (PA), Fairfax County (VA)
Formation & Governance
- Year Formed: 2018
- Leadership: Chair annual rotation
- Formal Memorandum of Understanding: No
Participants
- State PHLs: AR, ​IA, IL, IN, KS, MN, MI, MO, NE, OK (PHL, EH), WI
- Environmental: OK
- Local PHLs: City of Milwaukee (WI)
Formation & Governance
- Year Formed: 2018
- Leadership: Chair annual rotation
- Formal Memorandum of Understanding:Yes
Participants
- State PHLs: CA, OR, WA, AK, HI, NV
- Local PHLs: Los Angeles County (CA)
- US Territories: Guam
Formation & Governance
- Year Formed: 2018
- Leadership: Chair annual rotation
- Formal Memorandum of Understanding: Yes
Participants
- State PHLs: AZ, CO, NM, UT, TX​
- Local PHLs: ​Dallas County (TX), Houston (TX)