| Mechanicsburg WWTP | Mechanicsburg | 0.17 |
| West Lafayette WWTP | W Lafayette | 0.17 |
| Chauncey WWTP | Chauncey | 0.17 |
| Felicity WWTP | Felicity | 0.17 |
| Frankfort WWTP | Frankfort | 0.17 |
| Pleasant City WWTP | Pleasant City | 0.16 |
| Waynesfield WWTP | Waynesfield | 0.16 |
| Kalida STP | Kalida | 0.16 |
| Tiltonsville WWTP | Tiltonsville | 0.16 |
| Rio Grande WWTP | Rio Grande | 0.16 |
| Valley View WWTP | Chesterland | 0.16 |
| Hiram WWTP | Hiram | 0.16 |
| Convoy WWTP | Convoy | 0.15 |
| Haskins WWTP | Haskins | 0.15 |
| Beach City WWTP | Beach City | 0.14 |
| Ripley Sewage Treatment Plant | Ripley | 0.14 |
| Bremen WWTP | Bremen | 0.14 |
| Lynchburg WWTP | Lynchburg | 0.14 |
| Beverly WWTP | Beverly | 0.14 |
| Ashley STP | Ashley | 0.14 |
| Fort Recovery WWTP | Ft Recovery | 0.14 |
| New Paris WWTP | New Paris | 0.14 |
| Seaman WWTP | Seaman | 0.14 |
| Shiloh WWTP | Shiloh | 0.14 |
| North Lewisburg WWTP | N Lewisburg | 0.14 |
| Cygnet WWTP | Cygnet | 0.14 |
| Eaton Homes WWTP | Elyria | 0.13 |
| Dillonvale-Mt Pleasant | Dillonvale | 0.13 |
| Brilliant Water & Sewer District WWTP | Brilliant | 0.13 |
| Syracuse-Racine Regional Sd WWTP | Racine | 0.13 |
| Southeastern Correctional Institution | Lancaster | 0.13 |
| Powhatan Point WWTP | Powhatan Point | 0.13 |
| Lucas WWTP | Lucas | 0.13 |
| Milan WWTP | Milan | 0.13 |
| Orwell WWTP | Orwell | 0.13 |
| Ohio City WWTP | Ohio City | 0.12 |
| Sycamore Trails WWTP | Springboro | 0.12 |
| Laurelville WWTP | Laurelville | 0.12 |
| Walnut Creek WWTP | Millersburg | 0.12 |
| Republic WWTP | Republic | 0.12 |
| Ashtabula Co Coffee Creek WWTP | Austinburg | 0.11 |
| Arlington Village-Arlington Village | Arlington | 0.11 |
| Bloomingburg WWTP | Bloomingburg | 0.11 |
| New Waterford WWTP | New Waterford | 0.11 |
| Smithfield WWTP | Smithfield | 0.11 |
| New Holland Village Pws-New Holland Village | New Holland | 0.11 |
| Luckey WWTP | Luckey | 0.11 |
| Sardinia WWTP | Sardinia | 0.11 |
| Prospect WWTP | Prospect | 0.1 |
| Opalocka WWTP | Chesterland | 0.1 |
| Forest Village-Forest Village Old | Forest | 0.1 |
| Randolph WWTP | Ravenna | 0.1 |
| New Vienna Village-New Vienna WTP | New Vienna | 0.1 |
| Salineville WWTP | Salineville | 0.09 |
| Hopedale WWTP | Hopedale | 0.09 |
| Gratis WWTP | Gratis | 0.09 |
| Roaming Shores WWTP | Roaming Shores | 0.09 |
| Gnadenhutten WWTP | Gnadenhutten | 0.09 |
| New Madison STP | New Madison | 0.09 |
| New Matamoras WWTP | New Matamoras | 0.09 |
| Put-In-Bay STP | Put In Bay | 0.09 |
| Bolingbrook WWTP | Ravenna | 0.09 |
| South Salem WWTP | South Salem | 0.09 |
| Yorkville STP | Yorkville | 0.09 |
| Marshallville Village Pws-Marshallville Water Department | Marshallville | 0.09 |
| Atwater WWTP | Ravenna | 0.08 |
| Auburn Corners WWTP | Auburn Twp | 0.08 |
| Stockport WWTP | Stockport | 0.08 |
| Fort Jennings WWTP | Fort Jennings | 0.08 |
| Coal Grove-Coal Grove | Coal Grove | 0.08 |
| Dunkirk WWTP | Dunkirk | 0.08 |
| Oakwood WWTP | Oakwood | 0.08 |
| Dresden WWTP | Dresden | 0.08 |
| Bowerston WWTP | Bowerston | 0.08 |
| Nettle Lake Area STP | Pioneer | 0.08 |
| Frazeysburg WWTP | Frazeysburg | 0.08 |
| Bloomville WWTP | Bloomville | 0.08 |
| Grand Rapids WWTP | Grand Rapids | 0.07 |
| St Clairsville West WWTP | Saint Clairsville | 0.07 |
| Clarksville WWTP | Clarksville | 0.07 |
| Mineral City WWTP | Mineral City | 0.07 |
| Infirmary Creek WWTP | Chardon | 0.07 |
| Liberty Center WWTP | Liberty Center | 0.07 |
| Washingtonville WWTP | Washingtonville | 0.07 |
| Beallsville WWTP | Beallsville | 0.07 |
| Kirkersville WWTP | Kirkersville | 0.07 |
| Enchanted Acres Mhp | Columbus | 0.07 |
| Clermont Co Commissioners Arrowhead Park STP | Loveland | 0.07 |
| Wayne Co Eastwood Subdivision STP | Wooster | 0.07 |
| Beloit WWTP | Beloit | 0.07 |
| Lorain Co Brentwood Lake WWTP | Grafton | 0.07 |
| Russell Park WWTP | Russell | 0.07 |
| Clarksburg WWTP | Clarksburg | 0.07 |
| Fayette WWTP | Fayette | 0.07 |
| Edon WWTP | Edon | 0.06 |
| Melody Village WWTP No 10 | Clinton | 0.06 |
| Lindsey WWTP | Lindsey | 0.06 |
| Bettsville WWTP | Bettsville | 0.06 |
| Laura WWTP | Laura | 0.06 |
| Lowell WWTP | Lowell | 0.06 |
| Madison Co Sewer Dist No 1 | London | 0.06 |
| Spencer WWTP | Spencer | 0.06 |
| Lorain Co Cresthaven WWTP | Elyria | 0.06 |
| Senecaville WWTP | Senecaville | 0.06 |
| Bloomdale WWTP | Bloomdale | 0.06 |
| Zelray Park WWTP No 48 | Akron | 0.06 |
| Pleasant Hill WWTP | Pleasant Hill | 0.06 |
| Coalton WWTP | Coalton | 0.06 |
| Ostrander WWTP | Ostrander | 0.06 |
| Kidron WWTP | Kidron | 0.06 |
| Mill Creek Estates WWTP | Marysville | 0.06 |
| Alger WWTP | Alger | 0.05 |
| Perrysville WWTP | Perrysville | 0.05 |
| Springwood Lake Camp Club WWTP | Navarre | 0.05 |
| Junction City WWTP | Junction City | 0.05 |
| Middle Point WWTP | Middle Point | 0.05 |
| Mecca WWTP No 1 | Cortland | 0.05 |
| Scio WWTP | Scio | 0.05 |
| Flat Branch WWTP | East Liberty | 0.05 |
| Mayflower Estates WWTP | Cincinnati | 0.05 |
| Caledonia WWTP | Caledonia | 0.05 |
| West Jefferson WWTP | Celina | 0.05 |
| Grandview Estates Sd 2a | Marion | 0.05 |
| Scioto Hills STP | Powell | 0.05 |
| Arrowhead WWTP | Sidney | 0.04 |
| Beaver WWTP & Collection System | Beaver | 0.04 |
| Belle Vernon WWTP | Russell | 0.04 |
| Newport W & Sd | Newport | 0.04 |
| Mcguffey STP | Mcguffey | 0.04 |
| South Solon WWTP | South Solon | 0.04 |
| Damascus WWTP | Damascus | 0.04 |
| Heather Hill Care Communities | Chardon | 0.04 |
| Fountain Place WWTP Sd 5a | Marion | 0.04 |
| Aquilla Village WWTP | Chardon | 0.04 |
| Nevada Village | Nevada | 0.04 |
| South Webster WWTP | South Webster | 0.04 |
| Sycamore WWTP | Sycamore | 0.04 |
| Dee Mar Allotment WWTP | Navarre | 0.04 |
| Broken Fence WWTP No 32 | New Franklin | 0.04 |
| Hueston Woods State Park Lodge & Cabins WWTP | College Corner | 0.04 |
| Bazetta WWTP | Cortland | 0.04 |
| Marengo Village | Marengo | 0.04 |
| Haydenville WWTP | Logan | 0.04 |
| Chesterville WWTP | Chesterville | 0.04 |
| Warsaw WWTP | Warsaw | 0.03 |
| Grover Hill WWTP | Grover Hill | 0.03 |
| Scaff-Starrett WWTP | West Portsmouth | 0.03 |
| Flakes Ford Estates | Washington Court House | 0.03 |
| Tontogany WWTP | Tontogany | 0.03 |
| Rolling Hills Subdiv WWTP | Byesville | 0.03 |
| Ohso Southington Mhp Llc | Southington | 0.03 |
| Evergreen Poplar Llc | Fostoria | 0.03 |
| Scarsdale WWTP | Chagrin Falls | 0.03 |
| Holmesville WWTP | Holmesville | 0.03 |
| Evansport WWTP | Evansport | 0.03 |
| Stratton WWTP | Empire | 0.03 |
| Stonelick State Park Campgrounds WWTP | Pleasant Plain | 0.03 |
| Rock Creek WWTP & Sewer System | Rock Creek | 0.03 |
| Woodland Country Manor | Somerville | 0.03 |
| Nws Williamsburg On The River WWTP | Bowling Green | 0.03 |
| Burbank WWTP | Burbank | 0.03 |
| Spring Valley Allotment WWTP | Canal Fulton | 0.03 |
| Diehl Lake Collection & WWTP | Ellsworth | 0.03 |
| New Bloomington WWTP | New Bloomington | 0.03 |
| Eldorado WWTP | Eldorado | 0.03 |
| Portage Co Red Fox WWTP | Shalersville | 0.03 |
| North Quarry Subdivision | Marion | 0.03 |
| Harrod WWTP | Harrod | 0.03 |
| Mental Health Center WWTP | Cambridge | 0.03 |
| Odnr Deer Creek State Park STP | Williamsport | 0.03 |
| Rutland Regional Sd | Rutland | 0.03 |
| West Manchester WWTP | West Manchester | 0.03 |
| Vinton WWTP | Vinton | 0.02 |
| Purtee Acres WWTP | Wheelersburg | 0.02 |
| Williams Co/hillside Country Living WWTP | Bryan | 0.02 |
| Clarington WWTP | Clarington | 0.02 |
| Burton Lakes WWTP | Burton | 0.02 |
| Roots Fairwayview Subdiv | Kenton | 0.02 |
| Meadowbrook Mhp | Lockbourne | 0.02 |
| Hayden Heights Mhp | Dublin | 0.02 |
| Rockbridge WWTP | Rockbridge | 0.02 |
| Lafayette WWTP | Lafayette | 0.02 |
| Hickory Hills WWTP | Kirtland | 0.02 |
| Fredericksburg WWTP | Fredericksburg | 0.02 |
| Walnut Heights Subdiv | Circleville | 0.02 |
| Harrison Lake State Park WWTP | Fayette | 0.02 |
| Greentree WWTP | Moreland Hills | 0.02 |
| Hidden Acres Campground Inc | West Salem | 0.02 |
| Shawnee WWTP | Shawnee | 0.02 |
| Mt Hope WWTP | Mount Hope | 0.02 |
| Kimberly Estates WWTP | Newbury | 0.02 |
| Forest Creek Mhp | Amelia | 0.02 |
| Odnr Pymatuning State Park | Andover | 0.02 |
| Rockwood Ledges WWTP | Kirtland | 0.02 |
| Lake Moor Estates Subdiv | Logan | 0.02 |
| Maplewood Subdiv | Steubenville | 0.02 |
| Stryker STP | Stryker | 0.02 |
| Skyridge Apartment Homes | Cincinnati | 0.02 |
| Stacy Meadowcrest WWTP | Marietta | 0.02 |
| Norlick Place WWTP | Bryan | 0.02 |
