We found 172 public water systems that could serve the same population as Keystone Water Co-northumberla (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Aqua Pa Roaring Creek Division | Shamokin | 43,000 | 36 | 4 |
| Pa American White Deer | County of Northumberland | 29,816 | 43 | 5 |
| Municipal Authority Sunbury | Sunbury | 11,043 | 17 | 135 |
| Mt Carmel Mun Water Auth | County of Northumberland | 9,500 | 0 | 0 |
| Virginia Bottled Water Co. Inc | Pennsylvania | 7,000 | 0 | 0 |
| Tulpehocken Spring Water Co | County of Northumberland | 3,500 | 0 | 0 |
| Dutch Valle Food Co Inc | County of Northumberland | 3,500 | 0 | 0 |
| Trevorton Water Company | County of Northumberland | 2,230 | 0 | 0 |
| Ralpho Twp Water Auth | County of Northumberland | 1,800 | 0 | 0 |
| Merck & Co Inc | County of Northumberland | 1,000 | 0 | 0 |
| Marion Heights Water Company | County of Northumberland | 900 | 0 | 0 |
| The Fence | County of Northumberland | 750 | 0 | 20 |
| Turbotville Mun Water | County of Northumberland | 705 | 0 | 47 |
| Splash Magic | County of Northumberland | 700 | 0 | 20 |
| Penndot-site 47 Prim Rest Area | County of Northumberland | 700 | 0 | 0 |
| Line Mountain Sr High School | County of Northumberland | 644 | 0 | 75 |
| Sunbury Social Club | County of Northumberland | 600 | 0 | 0 |
| Northumberland Wa % R Haddon | County of Northumberland | 540 | 0 | 0 |
| Augusta Water Inc | County of Northumberland | 500 | 0 | 4 |
| Sunoco Food Mart # 2342 | County of Northumberland | 500 | 0 | 12 |
| M M Food Mart | County of Northumberland | 500 | 0 | 8 |
| Allenwood Fed. Prison Complex | Allenwood | 500 | 0 | 0 |
| Creamy Delight Inc. | County of Northumberland | 500 | 0 | 0 |
| Revival Tabernacle | County of Northumberland | 500 | 0 | 0 |
| Cherokee Pharmaceuticals Llc | County of Northumberland | 456 | 0 | 34 |
| Lower Mahanoy Twp Mun Auth | County of Northumberland | 450 | 0 | 56 |
| Herndon Boro Jackson Twp Jma | County of Northumberland | 432 | 0 | 67 |
| Oaklyn Elementary School | County of Northumberland | 359 | 0 | 0 |
| The Meadows At Watsontown Llc | County of Northumberland | 345 | 0 | 0 |
| Penn 80 Milton | County of Northumberland | 300 | 0 | 108 |
| ZERBE TWP MUN RECREATON CENTER | County of Northumberland | 300 | 0 | 0 |
| Pa American Mcewensville | County of Northumberland | 282 | 0 | 73 |
| Kathy's Korner | County of Northumberland | 250 | 0 | 0 |
| Riverside Elementary School | County of Northumberland | 225 | 0 | 0 |
| Dorsey Trailers Inc | County of Northumberland | 210 | 0 | 0 |
| Aqua Pa East Cameron | County of Northumberland | 200 | 0 | 239 |
| Ric Mar Restaurant | County of Northumberland | 200 | 0 | 4 |
| Knoebels Three Ponds Golf Club | County of Northumberland | 200 | 0 | 10 |
| Pottsgrove Fire Company | County of Northumberland | 200 | 0 | 15 |
| YE OLDE MEETING PLACE | County of Northumberland | 200 | 0 | 15 |
| Brumbachs Auction | County of Northumberland | 200 | 0 | 32 |
| The Hut | County of Northumberland | 200 | 0 | 0 |
| Mays Drive In Restaurant | County of Northumberland | 200 | 0 | 0 |
| B&b Sales | County of Northumberland | 200 | 0 | 0 |
| Kipps Run Swim Club | County of Northumberland | 200 | 0 | 0 |
| Heet`s Treats | County of Northumberland | 200 | 0 | 0 |
| Fetters Meats | County of Northumberland | 200 | 0 | 0 |
| Augusta Boys Inc. | County of Northumberland | 200 | 0 | 0 |
| Clymer's Mobile Home Park | County of Northumberland | 190 | 0 | 0 |
| Joseph Priestley Elem. School | County of Northumberland | 186 | 0 | 0 |
| Watsontown Alliance Church | County of Northumberland | 176 | 0 | 0 |
| The Roost | County of Northumberland | 150 | 0 | 13 |
| Indian Hills Golf & Tennis | County of Northumberland | 150 | 0 | 14 |
| Country Kitchen | County of Northumberland | 150 | 0 | 0 |
| Ccs | County of Northumberland | 150 | 0 | 0 |
| Bresslers Truck Plaza Llc | County of Northumberland | 150 | 0 | 0 |
| St John's Lutheran Church | County of Northumberland | 150 | 0 | 0 |
| Good Wils Restaurant | County of Northumberland | 150 | 0 | 0 |
| Mays Drive In | County of Northumberland | 140 | 0 | 21 |
| Kipps Run Swimming Pool | County of Northumberland | 140 | 0 | 0 |
| West Cameron El.sch.% Line Mt. | County of Northumberland | 130 | 0 | 0 |
| Leck Kill Elem School | County of Northumberland | 125 | 0 | 0 |
| YOUTH CHALLENGE INTERNATIONAL | County of Northumberland | 125 | 0 | 0 |
| St.john Lutheran Church | County of Northumberland | 125 | 0 | 0 |
| Irish Valley Campground | County of Northumberland | 120 | 0 | 0 |
| YOGI AT SHANGRI LA | County of Northumberland | 120 | 0 | 0 |
| Priestley Elementary | County of Northumberland | 120 | 0 | 0 |
| Maranatha Christian School | County of Northumberland | 110 | 0 | 0 |
| Sunbury Airport Campsite | County of Northumberland | 105 | 0 | 0 |
| Dental Health Associates | County of Northumberland | 100 | 0 | 0 |
| Bucknell View Mhp | County of Northumberland | 100 | 0 | 0 |
| Just Vittles | County of Northumberland | 100 | 0 | 0 |
| Cherokee Tap Room | County of Northumberland | 100 | 0 | 0 |
| R And R Campground | County of Northumberland | 100 | 0 | 0 |
| Hannahs Restaurant | County of Northumberland | 100 | 0 | 0 |
| ZARTMAN CONSTRUCTION | County of Northumberland | 100 | 0 | 0 |
| The Muffin Man | County of Northumberland | 100 | 0 | 0 |
| Stielys River Shore Campsite | County of Northumberland | 100 | 0 | 0 |
| Penndot-site 47 Primitive Rest | County of Northumberland | 100 | 0 | 0 |
| Camp Big Paw | County of Northumberland | 100 | 0 | 0 |
| Pat And Jim's Diner | County of Northumberland | 100 | 0 | 0 |
| Greshys Restaurant | County of Northumberland | 100 | 0 | 0 |
| Eister's Sunoco Service | County of Northumberland | 100 | 0 | 0 |
| Von & Deans Famous Soup House | County of Northumberland | 100 | 0 | 0 |
| Mama Macs | County of Northumberland | 100 | 0 | 0 |
| Kingdom Hall Of Jehovah Witnes | County of Northumberland | 100 | 0 | 0 |
| North Rush Dairy Store | County of Northumberland | 100 | 0 | 0 |
| Northumberland County Sports | County of Northumberland | 100 | 0 | 0 |
| Nooning House | County of Northumberland | 100 | 0 | 0 |
| Interstate Market | County of Northumberland | 100 | 0 | 0 |
| The Cream Machine | County of Northumberland | 100 | 0 | 0 |
| Shelley's Place | County of Northumberland | 100 | 0 | 0 |
| T. & H. Auto Auction | County of Northumberland | 100 | 0 | 0 |
| Foreman's Store | County of Northumberland | 100 | 0 | 0 |
| East Cameron Twp Fire Co | County of Northumberland | 100 | 0 | 0 |
| Shamokin Cong Jehovahs Witness | County of Northumberland | 90 | 0 | 0 |
| Heeters Drive In | County of Northumberland | 85 | 0 | 0 |
| Mt View Bible Camp | County of Northumberland | 80 | 0 | 0 |
| Excelsior Water Association | County of Northumberland | 78 | 0 | 0 |
| Allis Restaurant & Bar | County of Northumberland | 75 | 0 | 0 |
| The Ponds | County of Northumberland | 75 | 0 | 0 |
| Thomas Ernst Water Supply | Riverside | 70 | 0 | 0 |
| Teen Challenge Institute | County of Northumberland | 70 | 0 | 0 |
| Bradleys Fern Park | County of Northumberland | 60 | 0 | 0 |
| Steamers Inc. | County of Northumberland | 60 | 0 | 0 |
| Chadwicks | County of Northumberland | 60 | 0 | 0 |
| Locust Breeze Restaurant | County of Northumberland | 60 | 0 | 0 |
| Sunbury Bible Church | County of Northumberland | 59 | 0 | 0 |
| Fort Boone Campground | County of Northumberland | 54 | 0 | 0 |
| Family Practice Center | County of Northumberland | 50 | 0 | 0 |
| Voiture 13 40 Et 8 Club | County of Northumberland | 50 | 0 | 0 |
| D And H Trailer Park | County of Northumberland | 50 | 0 | 0 |
| White Oak Tavern | County of Northumberland | 50 | 0 | 0 |
| Steel Steeds Shoreline Campgrd | County of Northumberland | 50 | 0 | 0 |
| South Side Fire Company #1 | County of Northumberland | 50 | 0 | 0 |
| Ghezzis | County of Northumberland | 50 | 0 | 0 |
| Log Cabin Inn | County of Northumberland | 50 | 0 | 0 |
| Island Park Administration Bld | County of Northumberland | 50 | 0 | 0 |
| Ray L Ulrich Post #841 | County of Northumberland | 50 | 0 | 0 |
| Camp Hallowing Run | County of Northumberland | 50 | 0 | 0 |
| Hickory Dickory Day Nursery | County of Northumberland | 50 | 0 | 0 |
| Countryside Inn Inc | County of Northumberland | 50 | 0 | 0 |
| ZELLER'S MOBILEHOME PARK | County of Northumberland | 49 | 0 | 0 |
| Sunbury Animal Hospital | County of Northumberland | 45 | 0 | 0 |
| WRAYS RIVERFRONT CAMPGROUND | County of Northumberland | 45 | 0 | 0 |
| Pleasant View Convalescent Hom | County of Northumberland | 45 | 0 | 0 |
| Mulberry Cove | County of Northumberland | 40 | 0 | 0 |
| Pp&l-montour Preserve Interpre | County of Northumberland | 39 | 0 | 0 |
| Milton Boat Club | County of Northumberland | 35 | 0 | 0 |
| Richard L Hauck Mhp | County of Northumberland | 35 | 0 | 0 |
| Blue Spruce Inn | County of Northumberland | 35 | 0 | 0 |
| Eyers Manor | County of Northumberland | 31 | 0 | 0 |
| Northd Area Early Head Start | County of Northumberland | 30 | 0 | 0 |
| Alvin E Long Post 504 | County of Northumberland | 30 | 0 | 0 |
| Mandata Hotel | County of Northumberland | 30 | 0 | 0 |
| Northern Assisted Living Cente | County of Northumberland | 30 | 0 | 0 |
| Urban Hotel | County of Northumberland | 28 | 0 | 0 |
| Pp&l-goose Cove Rec Area | County of Northumberland | 26 | 0 | 0 |
| Babycakes Bakery | County of Northumberland | 25 | 0 | 0 |
| C P Cafe And Gift Shop | County of Northumberland | 25 | 0 | 0 |
| Penns Tavern | County of Northumberland | 25 | 0 | 0 |
| Dollar General Stonington | County of Northumberland | 25 | 0 | 0 |
| Tri County Water | County of Northumberland | 25 | 0 | 0 |
| Glacier Water | County of Northumberland | 25 | 0 | 0 |
| Gabriellas Pizzeria And Rest | County of Northumberland | 25 | 0 | 0 |
| Camp Shawnee | County of Northumberland | 25 | 0 | 0 |
| Lts Tavern | County of Northumberland | 25 | 0 | 0 |
| Arrowhead Restaurant | County of Northumberland | 25 | 0 | 0 |
| Point Drive In | County of Northumberland | 25 | 0 | 0 |
| Herndon Camp Meeting Assn | County of Northumberland | 25 | 0 | 0 |
| Short Stop Market-northumberld | County of Northumberland | 25 | 0 | 0 |
| Dollar General Turbotville | County of Northumberland | 25 | 0 | 0 |
| Whispering Oaks Vineyard | County of Northumberland | 25 | 0 | 0 |
| Drumhellers Cafe | County of Northumberland | 25 | 0 | 0 |
| Geist Tavern | County of Northumberland | 25 | 0 | 0 |
| Pine Wood Campground | County of Northumberland | 25 | 0 | 0 |
| Line Mt.sch.dist.%dale Martz | County of Northumberland | 25 | 0 | 0 |
| C P Bakery | County of Northumberland | 25 | 0 | 0 |
| Dalmatia Mfg. Co. | County of Northumberland | 25 | 0 | 0 |
| Renns Campground | County of Northumberland | 25 | 0 | 0 |
| Fantasy Island Campground | County of Northumberland | 25 | 0 | 0 |
| Pp&l-heron Cove Rec Area | County of Northumberland | 25 | 0 | 0 |
| Pa St Police-milton Station | County of Northumberland | 25 | 0 | 0 |
| Pa St Police-troop F | County of Northumberland | 25 | 0 | 0 |
| Riverside Kindergarten % | County of Northumberland | 25 | 0 | 0 |
| 3t Sports Complex | County of Northumberland | 25 | 0 | 0 |
| Upper Augusta Twp Vol Fire Co | County of Northumberland | 25 | 0 | 0 |
| Augusta Spring Water | County of Northumberland | 25 | 0 | 0 |
| Sandy's Mobilehome Park | County of Northumberland | 21 | 0 | 0 |
| Howerters Trailer Park | County of Northumberland | 21 | 0 | 0 |
| Howerters Trailer Park | County of Northumberland | 21 | 0 | 0 |
| Kipps Run Mobile Court | County of Northumberland | 19 | 0 | 0 |