Scan the list of municipalities below to see which water plant your water comes from, or if the water at your property could come from two sources. * Purchases water from MAWC in bulk. Visit your water utility's home page for authoritative information.
| GEORGE R. SWEENEY WATER PLANT (Beaver Run Reservoir) | INDIAN CREEK WATER PLANT (Upper Yough River) | BLENDED | MCKEESPORT WATER PLANT (Lower Yough River) | LIGONIER SYSTEM (North Fork Reservoir) |
| (INDIAN CREEK AND SWEENEY PLANTS) | ||||
| Allegheny Township | Arona Borough | Adamsburg Borough | Duquesne * | High Acres |
| Apollo Borough | Belle Vernon * | Derry Township | McKeesport | Laurel Mountain Borough |
| Avonmore Borough | Bullskin Township | Hempfield Township | Port Vue Borough | Laughlintown |
| Bell Township | Connellsville | Herminie | Versailles Borough | Ligonier Borough |
| Conemaugh Township | Connellsville Township | Irwin Borough | White Oak Borough | Ligonier Township |
| Delmont Borough | Dawson Borough | Jeannette City | Fairfield Twp. | |
| East Vandergrift Borough | East Huntington Township | Manor Borough | ||
| Export Borough | Everson Borough | Monroeville * | ||
| Gilpin Township * | Forward Township | New Alexandria Borough | ||
| Hyde Park Borough | Greensburg City | North Huntingdon Township | ||
| Kiskiminetas Township | Hunker Borough | North Irwin Borough | ||
| Leechburg Borough | Madison Borough | Penn Borough | ||
| Loyalhanna Township | Mount Pleasant Borough | Salem Township | ||
| Monroville * | Mount Pleasant Township | Sewickley Township | ||
| Municipality of Murrysville | New Stanton Borough | South Versailles Township | ||
| North Apollo Borough | North Versailles Township | Unity Township | ||
| Oklahoma Borough | Perry Township | Trafford | ||
| Parks Township * | Pleasant Valley * | |||
| Penn Township | Rostraver Township | |||
| Plum * | Scottdale Borough | |||
| Saltsburg | Smithton Borough | |||
| Vandergrift Borough | South Connellsville Borough | |||
| Washington Township | South Greensburg Borough | |||
| West Leechburg Borough | Southwest Greensburg Borough | |||
| Burrell Twp. | South Huntington Township | |||
| Suttersville Borough | ||||
| Uniontown (PA American) * | ||||
| Upper Tyrone Township | ||||
| Wall Borough | ||||
| West Newton Borough | ||||
| Youngwood Borough |
