| Allegheny Cnty Sani Auth/allegheny Cnty | Pittsburgh | 178.7 |
| Northeast WPCP | Philadelphia | 158 |
| Phila Water Dept - SE STP | Philadelphia | 82.75 |
| Millville Boro WWTP | Millville | 44.35 |
| City Of Allentown Wastewater Treatment Plant | Allentown | 32.53 |
| Delcora-Western Regional Treatment Plant | Chester | 31.51 |
| City Of Erie, Pa - Wastewater Treatment Plant | Erie | 30.72 |
| Harrisburg Advanced Wastewater Treatment Facility | Harrisburg | 18.78 |
| Reading STP | Reading | 15.46 |
| Springettsbury Wastewater Treatment Plant | York | 10.24 |
| Gr Hazleton Jt Sew Auth WWTP | Hazleton | 7.42 |
| Washington E Washington STP | Washington | 7.1 |
| Oaks WWTP (lower Perkiomen Valley) | Oaks | 6.76 |
| Lower Bucks WWTP | Levittown | 6.7 |
| Chambersburg Boro STP | Chambersburg | 6.61 |
| Lebanon City STP | Lebanon | 6.57 |
| Upper Allegheny Jt Sani Auth STP | Creighton | 6.2 |
| Lrbsa - Throop Plant | Throop | 6.18 |
| Lower Allen Twp STP | New Cumberland | 5.93 |
| Butler Area Sewer Authority Wastewater Treatment | Butler | 5.87 |
| Valley Forge Sewer Authority WWTP | Phoenixville | 5.36 |
| Uniontown STP | Uniontown | 5.18 |
| Pottstown Wastewater Treatment Plant | Pottstown | 5.1 |
| Log College STP | Warminster | 4.96 |
| Dover Twp Water Sys-Admire Booster Cl | Dover | 4.7 |
| Upper Moreland Hatboro Jt Sew Auth/willow Grove | Willow Grove | 4.68 |
| Williamsport Sanitary Authority - Central Plant | Williamsport | 4.68 |
| New Stanton WPCP | Hunker | 4.53 |
| E Norriton Plymouth /norristown | Plymouth Meeting | 4.5 |
| Norristown Muni STP | Norristown | 4.48 |
| Hanover Boro STP | Mcsherrystown | 4.39 |
| Piney Fork STP | Pittsburgh | 4.36 |
| Latrobe Mun Auth STP | Latrobe | 4.25 |
| Altoona Easterly STP | Altoona | 4.21 |
| Morrisville Borough STP | Morrisville | 4.11 |
| Clairton Mun Auth STP | Clairton | 4.11 |
| Indiana Boro WWTP | Indiana | 4.1 |
| Sharon STP | Sharon | 3.84 |
| Swatara Twp STP | Hummelstown | 3.6 |
| Kiski Vly Wpca STP | Leechburg | 3.56 |
| West Goshen Township WWTP | West Chester | 3.43 |
| Pottsville Main STP | Pottsville | 3.34 |
| Lititz Boro-Well #5 House | Lititz | 3.33 |
| Allegheny Valley Joint Sewage Authority | Cheswick | 3.29 |
| Hampden Twp Roth Lane STP | Mechanicsburg | 3.25 |
| Bradford STP | Bradford | 3.23 |
| Johnstown Wastewater Treatment Plant | Johnstown | 3.1 |
| Upper Gwynedd-Towamencin Mun A | Lansdale | 3.07 |
| Shippensburg STP | Shippensburg | 3.06 |
| Brush Creek STP | Irwin | 3.05 |
| Hermitage Muni Auth STP | Hermitage | 3.04 |
| Leonard L Nary WWTP @ Montour Run | Coraopolis | 3.01 |
| Carlisle Region Water Pollution Control Facility | Carlisle | 2.85 |
| Mccandless Twp San Auth - Pine Creek STP | Gibsonia | 2.76 |
| Mountaintop Area Joint Sanitary Authority | Mountain Top | 2.72 |
| Matsunk STP | King Of Prussia | 2.68 |
| University Area Joint Authority/spring Creek Pollution Control Fac. | State College | 2.62 |
| Lansdale Boro STP | Lansdale | 2.59 |
| Upper Gwynedd Twp STP | North Wales | 2.57 |
| Abington WWTP | Abington | 2.51 |
| Elizabethtown STP | Elizabethtown | 2.48 |
| Upper Merion Twp. Auth-Trout R | King Of Prussia | 2.46 |
| Plum Creek Wastewater Treatment Plant | Verona | 2.44 |
| Pleasant Hills Auth STP | Clairton | 2.39 |
| Sunbury Muni Auth STP | Sunbury | 2.37 |
| Ephrata STP | Ephrata | 2.35 |
| Meadville Area STP | Meadville | 2.29 |
| Penn Twp STP | Hanover | 2.22 |
| Ingleside STP | Johnstown | 2.22 |
| Wyomissing Vly Jt Sa STP | Reading | 2.22 |
| Hollidaysburg Regional STP | Hollidaysburg | 2.22 |
| Huntingdon STP | Huntingdon | 2.2 |
| Quakertown WWTP | Quakertown | 2.19 |
| Lrbsa Archbald STP | Jermyn | 2.13 |
| St Marys Wastewater Treatment Plant | Saint Marys | 2.08 |
| City Of Dubois Sewage Treatment Plant | Dubois | 2.03 |
| City Of Lock Haven Water Dept | Lock Haven | 2.02 |
| Connellsville STP | Connellsville | 2.01 |
| Phoenixville Boro STP | Phoenixville | 1.98 |
| Williamsport Sanitary Authority - West Plant | Williamsport | 1.97 |
| East Pennsboro STP | Camp Hill | 1.95 |
| Brodhead Creek Regional Authority WWTP | Stroudsburg | 1.89 |
| Wastewater Treatment Plant | Bellefonte | 1.87 |
| City Of Beaver Falls STP | Beaver Falls | 1.85 |
| Riverview Sani Auth STP | Moon Twp | 1.84 |
| Danville Boro STP | Danville | 1.81 |
| Milton Wastewater Treatment Plant | Milton | 1.79 |
| Corry City STP | Corry | 1.72 |
| Youghiogheny STP | N Huntingdon | 1.69 |
| Breakneck Creek Regional Auth | Mars | 1.62 |
| Abington Regional Wastewater Authority - Chinchilla | Clarks Summit | 1.57 |
| New Freedom Boro Auth WWTP | New Freedom | 1.51 |
| Clearfield Mun Sew Sys STP | Clearfield | 1.49 |
| Myerstown STP | Myerstown | 1.48 |
| Susquehanna Water Treatment Plant | Columbia | 1.46 |
| Upper Saucon Twp STP | Center Valley | 1.45 |
| Bristol Borough WPC Plant | Bristol | 1.43 |
| Titusville Municipal Water-Treatment Plant | Titusville | 1.43 |
| West Mifflin - Thompson Run STP | West Mifflin | 1.43 |
| Grove City Boro STP | Grove City | 1.41 |
| Holiday Park STP | Pittsburgh | 1.39 |
| Monongahela STP | Monongahela | 1.37 |
| Northeast Boro STP | North East | 1.33 |
| Lewistown STP | Lewistown | 1.31 |
| Manheim STP | Manheim | 1.29 |
| Ambridge Boro STP | Ambridge | 1.28 |
| Warren City WWTP | Warren | 1.28 |
| Franklin Wastewater Treatment Plant | Franklin | 1.26 |
| Oakmont Boro - WWTP | Oakmont | 1.24 |
| New Oxford Municipal Authority WWTP | New Oxford | 1.22 |
| Eastern Snyder Cnty Regional Auth STP | Selinsgrove | 1.22 |
| Amity Twp WWTP | Douglassville | 1.21 |
| Ephrata Reg 2 STP | Ephrata | 1.21 |
| Tamaqua Boro | Tamaqua | 1.17 |
| Oil City STP | Oil City | 1.17 |
| Spring Twp STP | Sinking Spring | 1.16 |
| Coaldale Lansford Summit Hll Sew | Coaldale | 1.16 |
| Harvey Avenue STP | Doylestown | 1.14 |
| Berwick Mun Auth | Berwick | 1.13 |
| Flaugherty Run STP | Moon Township | 1.13 |
| Souderton Boro STP | Souderton | 1.12 |
| Conshohocken Boro Auth | Conshohocken | 1.11 |
| Punxsutawney Boro STP | Punxsutawney | 1.11 |
| Brush Run WPCP | Canonsburg | 1.11 |
| Concord Twp Central STP | Glen Mills | 1.09 |
| Ridgway Boro STP | Ridgway | 1.09 |
| Valley Jt Sew Auth STP | Athens | 1.08 |
| Hartley Twp Muni Auth WWTP | Laurelton | 1.08 |
| Catasaqua Mun Sew Auth | Catasauqua | 1.07 |
| Eureka WWTP | North Wales | 1.05 |
| Mt Pleasant Boro STP | Mount Pleasant | 1 |
| Bangor Wastewater Treatment P | Bangor | 0.99 |
| Mt Joy Boro Auth | Mount Joy | 0.99 |
| Vanport Township Municipal Aut | Vanport | 0.98 |
| Park Creek STP | Horsham | 0.97 |
| Lewisburg Area Jt. Sewer Auth | Lewisburg | 0.95 |
| Northeastern York Co. Sew Auth | Mount Wolf | 0.95 |
| Birdsboro STP | Birdsboro | 0.95 |
| Nazareth Boro Muni Auth WWTP | Nazareth | 0.94 |
| Farrell Mun Sew | Farrell | 0.9 |
| Kutztown Borough WWTP | Kutztown | 0.89 |
| Pine Creek Muni Auth STP | Jersey Shore | 0.87 |
| Mt Carmel Muni Sew Coll Sys & STP | Mount Carmel | 0.87 |
| Elkhorn Run STP | Monaca | 0.86 |
| Schuylkill Haven Borough | Schuylkill Haven | 0.86 |
| Goose Creek Wastewater Treatment Plant | West Chester | 0.85 |
| Pollock Run WPCP | West Newton | 0.84 |
| Northampton Boro/ Sew | Northampton | 0.84 |
| Upper Montgomery Joint Authority STP | Pennsburg | 0.84 |
| Elizabeth Boro STP | Elizabeth | 0.83 |
| Raccoon Creek STP | Aliquippa | 0.83 |
| South Middleton Twp Water Auth | Boiling Springs | 0.81 |
| Highspire Boro - STP | Highspire | 0.81 |
| Pine Grove Joint Treatment Authority WWTP | Pine Grove | 0.8 |
| New Holland WWTP | New Holland | 0.8 |
| Pigeon Creek STP | Charleroi | 0.8 |
| Moshannon Valley Jt. Auth. | Philipsburg | 0.79 |
| Wellsboro Muni Auth | Wellsboro | 0.79 |
| Saxonburg Area Authority STP | Renfrew | 0.78 |
| Chippewa Township Sanitary | Beaver Falls | 0.76 |
| Shenandoah Mun Sew Auth | Shenandoah | 0.76 |
| Tinicum Twp WWTP | Lester | 0.76 |
| Dillsburg STP | Dillsburg | 0.76 |
| Taylor Run Wastewater Treatment Plant | West Chester | 0.76 |
| Whitemarsh STP | Lafayette Hill | 0.76 |
| Silver Spring Twp STP | Mechanicsburg | 0.76 |
| Ctl Wayne Reg Auth | Honesdale | 0.76 |
| Bedford STP | Bedford | 0.75 |
| Baden STP | Baden | 0.75 |
| Mifflinburg WWTP | Mifflinburg | 0.74 |
| Coudersport Area Mun Auth STP | Coudersport | 0.74 |
| North Middleton Auth STP | Carlisle | 0.74 |
| Robesonia Wernersville STP | Wernersville | 0.73 |
| Butler Twp - St Johns STP | Drums | 0.73 |
| Central Carbon Mun. Auth. WWTP | Lehighton | 0.73 |
| Upper Dublin WWTP | Fort Washington | 0.72 |
| Antrim Twp Mun Auth STP | Greencastle | 0.72 |
| Bucks Cnty Water & Sew Auth/green St STP | Doylestown | 0.71 |
| Annville Twp STP | Annville | 0.7 |
| Portage Area Sew Auth WWTP | Portage | 0.7 |
| Ebensburg WWTP | Ebensburg | 0.69 |
| Waymart Area Auth WWTP | Waymart | 0.68 |
| Mccandless Twp - Longvue #1 STP | Pittsburgh | 0.68 |
| Upper Allen Twp STP | Mechanicsburg | 0.68 |
| Edinboro Boro WTP | Edinboro | 0.67 |
| Slatington WWTP | Slatington | 0.67 |
| New Brighton STP-Boro San. Auth. | New Brighton | 0.67 |
| Midland Boro STP | Midland | 0.66 |
| Duncansville STP | Duncansville | 0.65 |
| Robinson Twp Muni Auth-Robinson Wat Trt Plt | Pittsburgh | 0.65 |
| Sewickley Boro | Sewickley | 0.65 |
| Buffalo Twp Mun Auth STP | Sarver | 0.64 |
| Derry Borough STP | Derry | 0.64 |
| Hamburg Boro STP | Hamburg | 0.63 |
| Glassport Boro STP | Glassport | 0.63 |
| Marietta Donegal STP | Marietta | 0.62 |
| Milford-Trumbauersville WWTP | Spinnerstown | 0.61 |
| Brookville Muni Auth | Brookville | 0.61 |
| Frackville Area Mun Auth | Frackville | 0.61 |
| Logan Twp STP | Altoona | 0.6 |