Clean Air Act stationary source · ICIS-AIR MD0000002402700223
TRANSCONTINENTAL GAS PIPELINE, Ellicott City, MD: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 30Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 0Formal enforcement actions since January 1, 2017
TRANSCONTINENTAL GAS PIPELINE, at 11910 CARROLL MILL RD, Ellicott City in Howard County, Maryland, is an operating major source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “No Violation Identified”. Howard County is on EPA’s Green Book list of areas that do not meet a national air quality standard. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.
Identity
| Facility as filed | TRANSCONTINENTAL GAS PIPELINE |
|---|---|
| ICIS-AIR ID | MD0000002402700223 |
| EPA facility registry ID | 110000796782 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 11910 CARROLL MILL RD, Ellicott City, MD 21042 |
| County | Howard County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Pipeline transportation (NAICS 4862) |
| EPA region | 03 |
Cited to the EPA ICIS-AIR facility file (ECHO download).
Programs and pollutants
Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs TRANSCONTINENTAL GAS PIPELINE is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.
Compliance evaluations
- 30Evaluations since January 1, 2017
- 5Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| March 24, 2025 | FCE On-Site | State | 40 CFR Part 63 Area Sources; New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 28, 2025 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| July 22, 2024 | PCE Off-Site | State | Title V Permits |
| March 27, 2024 | PCE Off-Site | State | Title V Permits |
| January 11, 2024 | PCE Off-Site | State | Title V Permits |
| September 18, 2023 | PCE Off-Site | State | Title V Permits |
| August 2, 2023 | FCE On-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| April 17, 2023 | PCE Off-Site | State | Title V Permits |
| February 21, 2023 | PCE Off-Site | State | Title V Permits |
| September 22, 2022 | PCE Off-Site | State | Title V Permits |
| September 2, 2022 | PCE Off-Site | State | Title V Permits |
| February 18, 2022 | PCE Off-Site | State | Title V Permits |
| September 2, 2021 | PCE Off-Site | State | Title V Permits |
| August 16, 2021 | PCE Off-Site | State | Title V Permits |
| July 7, 2021 | FCE On-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 18, 2021 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| September 22, 2020 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| May 1, 2020 | PCE Off-Site | State | Title V Permits |
| August 29, 2019 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| June 25, 2019 | FCE On-Site | State | New Source Performance Standards; Title V Permits |
| June 19, 2019 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| March 7, 2019 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| October 24, 2018 | PCE Off-Site | State | New Source Performance Standards |
| August 30, 2018 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| August 1, 2018 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 15, 2018 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| August 11, 2017 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| July 6, 2017 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| March 1, 2017 | FCE On-Site | State | 40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 13, 2017 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
Violations
- 0Violation determinations since January 1, 2017
- 0Of them high-priority
A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.
EPA’s violation history file holds no violation for ICIS-AIR MD0000002402700223 since January 1, 2017.
Enforcement and penalties
0 formal enforcement actions since January 1, 2017, 0 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.
Informal enforcement
EPA’s informal action file holds no notice or warning for ICIS-AIR MD0000002402700223 since January 1, 2017.
Stack tests
- 17Stack tests since January 1, 2017
- 0Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| November 5, 2025 | Pass | State |
| August 5, 2025 | Pass | State |
| January 30, 2025 | Pass | State |
| June 28, 2024 | Pass | State |
| June 27, 2024 | Pass | State |
| June 27, 2024 | Pass | State |
| July 19, 2023 | Pass | State |
| September 1, 2022 | Pass | State |
| June 22, 2022 | Pass | State |
| June 20, 2022 | Pass | State |
| December 8, 2021 | Pass | State |
| November 11, 2020 | Pass | State |
| October 15, 2019 | Pass | State |
| July 17, 2019 | Pass | State |
| September 19, 2018 | Pass | State |
| December 19, 2017 | Pass | State |
| March 1, 2017 | Pass | State |
Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.
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How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110000796782 there.
Nearby on the register
- Air-emissions sources in Howard County
- Every source record in Howard County, A to Z
- Air-emissions sources in Maryland
- Every source record in Maryland, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.