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ICIS-AIR PA000785332

CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA, Prosperity, PA: Clean Air Act compliance record, inspections, violations, penalties

CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA is on EPA’s ICIS-AIR register at 24 DRY RUN RD, Prosperity in Washington County, Pennsylvania: operating status operating, emissions classification synthetic minor source, current violation status “No Violation Identified”. Washington County is on EPA’s Green Book list of areas that do not meet a national air quality standard.

Identity

Facility as filedCNX MIDSTREAM OPR CO LLC/NV-57 COMP STA
ICIS-AIR IDPA000785332
EPA facility registry ID110064097999
Operating statusOperating
Emissions classificationSynthetic minor source
Current violation status (HPV field)No Violation Identified
Address24 DRY RUN RD, Prosperity, PA 15329
CountyWashington County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Oil and gas extraction (NAICS 2111)
SIC code1311
EPA region03

Programs and pollutants

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

Compliance evaluations

DateWhat EPA recordedAgencyPrograms
June 18, 2026PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
October 16, 2025FCE On-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
May 3, 2025PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
December 18, 2024PCE On-Site Monitoring/SamplingStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
May 2, 2024PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
January 30, 2024PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
June 20, 2023PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 27, 2022PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 19, 2022PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
November 18, 2021FCE On-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
September 28, 2021PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
September 21, 2021PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 23, 2021PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 23, 2021PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
August 28, 2020PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
August 10, 2020PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
February 13, 2020FCE On-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
March 18, 2019PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
July 12, 2018PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 20, 2017FCE On-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 4, 2017PCE Off-SiteStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Violations

What high-priority and federally reportable violations mean.

DateWhat EPA recordedAgencyPrograms
September 21, 2021Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 23, 2021Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
April 23, 2021Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
August 18, 2020Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
July 17, 2020Earliest FRV determinationStateState Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Enforcement and penalties

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

Informal enforcement

DateWhat EPA recordedAgency
September 21, 2021Notice of ViolationState
August 10, 2020Notice of ViolationState

Stack tests

DateWhat EPA recordedAgency
August 10, 2026PassState
August 11, 2025PassState
July 16, 2025PassState
August 15, 2024PassState
August 10, 2023PassState
August 11, 2022PassState
October 6, 2021PassState
August 13, 2021PassState
August 12, 2020PassState
February 26, 2020PassState
March 15, 2019PassState
April 5, 2018PassState

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Free from EPA: Detailed Facility Report, ECHO Notify (registry ID 110064097999).

Other air sources in Pennsylvania beside CNX MIDSTREAM OPR CO LLC/NV-57 COMP STA

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