| AMHERST | OH | Participating | Amherst Municipal Electric Department |
| ARCANUM | OH | Participating | Arcanum Water and Light Plant |
| BEACH CITY | OH | Participating | Beach City Electric, Water and Sewer Utilities |
| BOWLING GREEN | OH | Participating | Bowling Green Municipal Utilities |
| BRADNER | OH | Participating | Village of Bradner Board of Public Affairs |
| BREWSTER | OH | Participating | Brewster Municipal Electric |
| CLEVELAND | OH | Participating | Cleveland Public Power |
| COLDWATER | MI | Participating | Coldwater Board of Public Utilities |
| COLUMBIANA | OH | Participating | City of Columbiana Electric Department |
| CUSTAR | OH | Participating | Custar Board of Public Affairs |
| CUYAHOGA FALLS | OH | Participating | Cuyahoga Falls Electric Department |
| DOVER | OH | Participating | Dover Light and Power |
| ELDORADO | OH | Participating | Eldorado Municipal Light, Sewer, and Refuse |
| ELMORE | OH | Participating | Elmore Board of Public Affairs |
| EPHRATA | PA | Participating | Borough of Ephrata Electric Division |
| GALION | OH | Participating | Galion Electric Division |
| GENOA | OH | Participating | Genoa Municipal Utilities |
| GLOUSTER | OH | Participating | Glouster Electric & Water Department |
| GRAFTON | OH | Participating | Village of Grafton Electric Department |
| HASKINS | OH | Participating | Village of Haskins Municipal Light and Power |
| HUBBARD | OH | Participating | City of Hubbard Light Department |
| HUDSON | OH | Participating | Hudson Public Power |
| JACKSON | OH | Participating | Jackson Municipal Electric Department |
| JACKSON CENTER | OH | Participating | Jackson Center Municipal Electric System |
| LAKEVIEW | OH | Participating | Lakeview Water and Light Company |
| LODI | OH | Participating | Village of Lodi Utilities |
| LUCAS | OH | Participating | Village of Lucas Electric Company |
MARSHALLVILLE
*Suburb of Orrville Utilities | OH | Participating | Village of Marshallville Utilities |
| MENDON | OH | Participating | Village of Mendon Utilities |
| MILAN | OH | Participating | Milan Municipal Electric Company |
| MINSTER | OH | Participating | Village of Minster Utilities Department |
| MONROEVILLE | OH | Participating | Village of Monroeville Electric Department |
| NAPOLEON | OH | Participating | Napoleon Light and Power |
| NEW BREMEN | OH | Participating | Village of New Bremen Utilities |
| NEWTON FALLS | OH | Participating | Newton Falls Electric Department |
| NILES | OH | Participating | City of Niles Light Department |
| OAK HARBOR | OH | Participating | Oak Harbor Public Power |
| OBERLIN | OH | Participating | Oberlin Municipal Light & Power |
| ORRVILLE | OH | Participating | Orrville Utilities |
| PEMBERVILLE | OH | Participating | Pemberville Municipal Electric |
| PROSPECT | OH | Participating | Prospect Municipal Electric |
| ST. MARYS | OH | Participating | City of St. Marys Municipal Electric System |
| TIPP CITY | OH | Participating | Tipp City Municipal Utilities |
| VERSAILLES | OH | Participating | Village of Versailles Utilities |
| WADSWORTH | OH | Participating | City of Wadsworth Electric and Communications |
| WAYNESFIELD | OH | Participating | Waynesfield Electric Department |
| WELLINGTON | OH | Participating | Wellington Municipal Utilities |
| WOODVILLE | OH | Participating | Village of Woodville Utilities Department |
| YELLOW SPRINGS | OH | Participating | Village of Yellow Springs |