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ICIS-AIR PA000284254

NATL FUEL GAS SUPPLY CORP/ROYSTONE COMP STA, Sheffield, PA: Clean Air Act compliance record, inspections, violations, penalties

NATL FUEL GAS SUPPLY CORP/ROYSTONE COMP STA is on EPA’s ICIS-AIR register at ROYSTONE STATION, Sheffield in Warren County, Pennsylvania: operating status operating, emissions classification major source, current violation status “No Violation Identified”. Warren County is on EPA’s Green Book list of areas that do not meet a national air quality standard.

What stands out

  • The newest of the 26 events on file is a compliance evaluation dated April 2, 2026.
  • Its events on file run from February 8, 2017 through April 2, 2026.
  • Of its 22 compliance evaluations on file, 7 are a full compliance evaluation.
  • The register holds 46 air-emissions sources in Warren County, Pennsylvania.

Every line is computed by formula from the record’s stored figures; nothing is estimated.

Identity

Facility as filedNATL FUEL GAS SUPPLY CORP/ROYSTONE COMP STA
ICIS-AIR IDPA000284254
EPA facility registry ID110007339111
Operating statusOperating
Emissions classificationMajor source
Current violation status (HPV field)No Violation Identified
AddressROYSTONE STATION, Sheffield, PA 16347
CountyWarren County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Pipeline transportation (NAICS 4862)
SIC code4922
EPA region03

Programs and pollutants

The program, pollutant and Title V files are not loaded: what this page covers.

Compliance evaluations

DateWhat EPA recordedAgencyPrograms
April 2, 2026PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
November 3, 2025FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 9, 2025PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 16, 2024PCE On-Site Monitoring/SamplingStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 9, 2024PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
October 11, 2023FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
May 31, 2023PCE On-Site Monitoring/SamplingStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 13, 2023PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
December 19, 2022PCE On-Site Monitoring/SamplingStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
July 28, 2022FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 11, 2022PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
June 21, 2021PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 9, 2021FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 2, 2021PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 6, 2020PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
May 2, 2019FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 25, 2019PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 9, 2018PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
March 29, 2018FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
May 11, 2017FCE On-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
April 10, 2017PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits
February 8, 2017PCE Off-SiteStateMACT Standards (40 CFR Part 63); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits

Violations

What high-priority and federally reportable violations mean.

EPA’s violation history file holds no violation for ICIS-AIR PA000284254 since January 1, 2017.

Enforcement and penalties

0 of the formal enforcement actions carry a penalty filed above zero. How a penalty is shown.

Informal enforcement

EPA’s informal action file holds no notice or warning for ICIS-AIR PA000284254 since January 1, 2017.

Stack tests

DateWhat EPA recordedAgency
April 15, 2024PassState
December 20, 2022PassState
September 1, 2021PassState
February 8, 2021PassState

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Billing

Privacy

Free from EPA: Detailed Facility Report, ECHO Notify (registry ID 110007339111).

Other air sources in Pennsylvania beside NATL FUEL GAS SUPPLY CORP/ROYSTONE COMP STA

EPA ICIS-AIR download, loaded September 14, 2026.