EPA Air · stack tests by county and year

Air-emissions stack tests in Butler County, Pennsylvania, 2020

23Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Butler County, Pennsylvania during 2020. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Butler County facility page.

Butler County, Pennsylvania, 2020

Air-emissions stack tests in Butler County, other years

What stands out

Stack tests in Butler County, Pennsylvania, fell from 28 in 2019, the previous year on file, to 23 in 2020.
The county’s file for stack tests holds 10 years of events, from 2017 through 2026.
Its 23 stack tests rank 10th of the 47 county cells in Pennsylvania for 2020.
Its 23 stack tests are 3.2% of the 725 the state’s file holds for 2020.

Every line is computed by formula from the state’s stored file; nothing is estimated.

Air-emissions stack tests recorded in Butler County, Pennsylvania, 2020

Date	Facility	Kind	Agency
2020-12-10	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-11-20	CALUMET KARNS CITY REF LLC/KARNS CITY	Pass	State
2020-10-30	ONEIDA VALLEY MIDSTRAM LLC/CONSTELLATION COMP STA	Pass	State
2020-10-22	PINE RUN MIDSTREAM LLC/BICKER COMP STA	Pass	State
2020-10-15	MARKWEST LIBERTY BLUESTONE LLC/SARSEN GAS PROC PLT	Pass	State
2020-10-09	MTN GATHERING LLC/FORWARD COMP STA	Pass	State
2020-10-06	MTN GATHERING LLC/JEFFERSON COMP STA	Pass	State
2020-09-28	CLEVELAND CLIFFS STEEL CORP/ BUTLER WORKS	Pass	State
2020-09-17	COHERENT CORP SAXONBURG PLT	Pass	State
2020-08-28	MARKWEST LIBERTY BLUESTONE LLC/BLUESTONE GAS PROC PLT	Pass	State
2020-08-27	MARKWEST LIBERTY BLUESTONE LLC/TRILLITH COMP STA	Pass	State
2020-08-05	MARKWEST LIBERTY BLUESTONE LLC/ROYAL OAK COMP STA	Pass	State
2020-07-27	UGI MORAINE EAST GATHERING LLC/RENICK COMP STA	Pass	State
2020-07-23	PINE RUN MIDSTREAM LLC/BASS COMP STA	Pass	State
2020-07-14	PINE RUN MIDSTREAM LLC/BICKER COMP STA	Pass	State
2020-07-01	MARKWEST LIBERTY BLUESTONE LLC/BLUESTONE GAS PROC PLT	Pass	State
2020-06-24	VORTEQ COIL FINISHERS/VALENCIA PLT	Pass	State
2020-06-09	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-05-14	RIVERWEST APPALACHIA MIDSTREAM LLC/CLINTON COMP STA	Pass	State
2020-04-17	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-03-20	MARKWEST LIBERTY BLUESTONE LLC/VOLL COMP STA	Pass	State
2020-02-21	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State
2020-02-12	ARMSTRONG CEMENT & SUPPLY/WINFIELD — high-priority violation on file	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in Butler, PA, in 2020. It lists 23 stack tests recorded in 2020.