The following streams will be treated by the Pennsylvania Black Fly Suppression Program:

CountyTreated Streams
AdamsConewago Creek
ArmstrongAllegheny River, Kiskiminetas River, Mahoning Creek, Redbank Creek
BerksManatawny Creek, Schuylkill River, Tulpehocken Creek
BradfordChemung River, North Branch Susquehanna River, Wyalusing Creek
BucksDelaware River, Tohickon Creek, Neshaminy Creek
CambriaConemaugh River, Stoneycreek River
ChesterBrandywine Creek, French Creek, Octoraro Creek, Schuylkill River, East Branch Brandywine Creek and West Branch Brandywine Creek
ClarionAllegheny River, Clarion River, Redbank Creek
ClearfieldWest Branch Susquehanna River and Chest Creek
ClintonBald Eagle Creek, West Branch Susquehanna River, Sinnemahoning Creek
ColumbiaFishing Creek, North Branch Susquehanna River
CumberlandConodoguinet Creek, Susquehanna River, Yellow Breeches Creek
DauphinJuniata River, Mahantango Creek, Susquehanna River, Swatara Creek
ElkClarion River
FayetteYoughiogheny River
ForestAllegheny River, Clarion River, Tionesta Creek
HuntingdonAughwick Creek, Frankstown Branch Juniata River, Juniata River
IndianaConemaugh River, Kiskiminetas River
JuniataJuniata River, Susquehanna River, Tuscarora Creek
LackawannaNorth Branch Susquehanna River
LawrenceConnoquenessing Creek, Neshannock Creek, Slippery Rock Creek
LebanonSwatara Creek
LehighLehigh River
LuzerneNorth Branch Susquehanna River
LycomingLoyalsock Creek, Pine Creek, West Branch Susquehanna River
MifflinJuniata River
MontgomeryManatawny Creek, Perkiomen Creek, Schuylkill River
NorthamptonDelaware River, Lehigh River
PerryJuniata River, Sherman Creek, Susquehanna River
SchuylkillSchuylkill River
SnyderMiddle Creek, Penns Creek, Susquehanna River
UnionPenns Creek, West Branch Susquehanna River
VenangoAllegheny River, French Creek, Oil Creek, Sandy Creek, Sugar Creek
WarrenAllegheny River, Brokenstraw Creek, Conewango Creek
WestmorelandConemaugh River, Kiskiminetas River, Loyalhanna Creek, Youghiogheny River
WyomingNorth Branch Susquehanna River, Tunkhannock Creek
YorkConewago Creek, Susquehanna River, Yellow Breeches Creek