PA Environment Digest Blog: DEP: Spills, Releases Continue At Seneca Resources Taft Shale Gas Well Pad In Middlebury Twp., Tioga County For 373 Days And Counting

On October 31, 2025, the Department of Environmental Protection inspected the Seneca Resources Co. LLC Taft 851 shale gas well pad in Middlebury Township, Tioga County and found evidence of continued spills and releases.

DEP found contaminated water on the pad outside containment that was running down a 40 foot channel at the pad outfall and then draining into a sediment basin, running over a sediment filter sock and leaving the site.

There was also evidence of multiple non-functioning erosion and sedimentation controls.

DEP was informed that equipment was arriving on the pad to drill an additional eight shale gas wells on the site.

DEP issued the original spill violations at the site on October 23, 2024 and documented spills again during a July 11, 2025 inspection that were confirmed with water samples collected on August 21, 2025.

DEP again recommends the owner monitor the conditions on the pad surface and the sediment basin and remove contaminated fluids and soils as discovered.

DEP made the same recommendation during an October 2, 2025 inspection.

The violations from October 23, 2024 were continued. No other requests were made of the owner. DEP Oct. 31 inspection report.

Criminal Charges

Also on October 31, Attorney General Dave Sunday announced charges against Seneca Resources, LLC, following multiple violations of Pennsylvania’s environmental protection laws in several counties, as recommended by the 48th and 51st Statewide Investigating Grand Juries.

Three separate criminal complaints were filed regarding the natural gas company’s violations related to improper waste management practices and policies.

In all, Seneca is charged with 64 counts of violations of the Solid Waste Management Act and 36 counts of violations of the Clean Streams Law in Cameron, Clearfield, Elk, Jefferson, Lycoming, McKean, Potter, Tioga Counties. Read more here.

Report Violations

To report oil and gas violations or any environmental emergency or complaint, visit DEP’s Environmental Complaint webpage.

Text photos and the location of abandoned wells to 717-788-8990.

Check These Resources

Visit DEP’s Compliance Reporting Database and Inspection Reports Viewer webpages to search their compliance records by date and owner.

Sign up for DEP’s eNOTICE service which sends you information on oil and gas and other permits submitted to DEP for review in your community.

Use DEP’s Oil and Gas Mapping Tool to find if there are oil and gas wells near or on your property and to find wells using latitude and longitude on well inspection reports.

Photos: DEP inspection photos tracking the contaminated fluid flow from the well pad, down a drainage channel, into sediment basin and off the well pad.)

[Note: If you believe your company was listed in error, contact DEP’s Oil and Gas Program.]

[Note: These may not be all the NOVs issued to oil and gas companies during this time period. Additional inspection reports may be added to DEP’s Oil and Gas Compliance Database.]

Resource Links - Seneca Resources:

-- Attorney General Sunday: Criminal Charges Filed Against Seneca Resources For 64 Counts Of Illegal Dumping Of Shale Gas Waste In Cameron, Clearfield, Elk, Jefferson, Lycoming, McKean, Potter, Tioga Counties [PaEN]

-- No One Warned A Cameron County Family Their Water Well Was Contaminated By A Seneca Resources Shale Gas Wastewater Pipeline Rupture [PaEN]

-- DEP: Day 155 - Contaminated Water Still Flowing From Seneca Resources Vandergrift Shale Gas Wells, Well Pad; Cleanup Continues In Charleston Twp., Tioga County [PaEN]

-- DEP: Seneca Resources Ignores NOVs On DCNR Shale Gas Well Pad Cleanup For 7 Months & Counting; Citizen Complaint Finds Homeowner Well Venting Gas; Multiple Tanker Truck Spills [PaEN]

-- Citizen Complaint, Company Report Results In DEP Inspection Finding 63,000 Gallon Wastewater Spill At Seneca Resources Shale Gas Well On State Game Lands In Elk County; More Leaks, Spills [PaEN]

-- Pine Creek Headwaters Protection Group Asks DCNR To Protect State Forest Land From Seneca Shale Gas Drilling Well Pad, Comply With PA Supreme Court Decision, Protect Recreation, Wildlife [PaEN]

PA Oil & Gas Industry Public Notice Dashboards:

-- PA Oil & Gas Weekly Compliance Dashboard - Nov. 1 to 7 - Failed To Plug Shale Gas Well For 1,521 Days; 20,000 Gallon Spill Into Mine Void; 99% Of Conventional Well Owners Fail To Comply With Methane Rule [PaEN]

-- DEP: More Than 99% Of Conventional Oil & Gas Facility Owners Failed To Comply With VOC/Methane Reduction Regulations Covering 64,660 Wells; Had 193 Days To File [PaEN]

-- DEP: Spills, Releases Continue At Seneca Resources Taft Shale Gas Well Pad In Middlebury Twp., Tioga County For 373 Days And Counting [PaEN]

-- DEP: MarkWest Liberty Midstream Pipeline Construction Results In 20,000 Gallon Spill Into Coal Mine Voids Under Washington County, For The 3rd Time [PaEN]