EPA TRI Facility · Natural Gas Processing
Markwest Utica Emg LLC
Cadiz, OH · Parent: Marathon Petroleum Corp
- Total releases
- 14.3K lbs
- Chemicals reported
- 3
- Carcinogens
- 1
- Primary pathway
- Air Releases
AIR Form-R mix
Markwest Utica Emg LLC: how the 14.3K lbs splits
14.3K lbs across all reported pathways
- Air Releases 12.4K lbs 86.7%
- Off-site Transfers 1.9K lbs 13.3%
Markwest Utica Emg LLC's 14.3K lbs Form-R total is AIR - air releases is 86.7% of the bar. Next segment: off-site transfers at 13.3%. Leading chemical by pounds: n-Hexane.
LIGHT volume AIR pathway CLEAN
Markwest Utica Emg LLC is an EPA Toxics Release Inventory reporter in Cadiz, OH, in the natural gas processing sector. It reported 7.4K lbs of releases across 3 chemicals in 2023, and 14.3K lbs in total across its 2022-2023 reporting years. That ranks 8,988 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Ohio's 1,299 reporting TRI sites, pounds #1 is not chemical-count #1. Markwest Utica Emg LLC is pounds #608 and chemical-count #621 at 14.3K lbs. Ineos Nitriles USA LLC leads reported pounds (42.4M lbs) at 31 chemicals (chemical-count #10). Heritage Thermal Services leads chemical count at 217 chemicals (431.4K lbs, pounds #116). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Utica Condensate Stabilization Facility (0634005057); Hopedale Fractionating Facility; Williams Harrison Hub Fractionation Plant (0634005028); Turf Care Supply Llc.. Similar-scale Natural Gas Processing peers outside Ohio: Stanberry Gas Plant; Northridge Gas Plant; Enable Products/clinton Natural Gas Processing Plant; Spearman Gas Plant. Other Marathon Petroleum Corp sites in this extract: Blanchard Refining Co LLC; Marathon Petroleum Co LP; Marathon Mandan Refinery; Catlettsburg Refining LLC. Largest disclosed chemicals by pounds: n-Hexane; 1,3-Butadiene; Ethylene.
Markwest Utica Emg LLC stamps LIGHT volume with a dominant AIR pathway (86.7% air releases) across 3 chemicals · 1 carcinogen-classified. Cumulative Form-R extract: 14.3K lbs (2022–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Stanberry Gas Plant and Northridge Gas Plant.
Markwest Utica Emg LLC vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
14K lbs Top 35% higher than 65% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Markwest Utica Emg LLC inside Harrison's TRI pounds
Among the 339 Natural Gas Processing facilities in this database, Markwest Utica Emg LLC reports the 197th-largest volume (14.3K lbs). This one site accounts for 30.0% of every pound reported in Harrison. Its reported volume is concentrated rather than spread: n-Hexane alone is 100% of the total. Scale peers outside Ohio include Stanberry Gas Plant and Northridge Gas Plant.
County-dominant here means ≥25% of Harrison's reported pounds (47.8K lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Markwest Utica Emg LLC's total reported releases rose from 6.9 thousand lb in 2022 to 7.4 thousand lb in 2023, based on EPA TRI filings.
- Markwest Utica Emg LLC's off-site transfers rose from 0 lb in 2022 to 1.9 thousand lb in 2023, based on EPA TRI filings.
- Markwest Utica Emg LLC's air releases fell from 6.9 thousand lb in 2022 to 5.5 thousand lb in 2023, based on EPA TRI filings.
Markwest Utica Emg LLC Form-R facts
Compare this facility
See how Markwest Utica Emg LLC stacks up against nearby facilities and the typical reporter.
53% more than the comparison
70% less than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Markwest Utica Emg LLC releases toxic chemicals into the environment. Total: 14.3K lbs.
Emissions Trend Summary
From 2022 to 2023, total releases increased by 7% (6.9K lbs to 7.4K lbs).
Markwest Utica Emg LLC: annual Form-R pounds
LIGHT site · AIR pathway · TRI years 2022–2023
- 2022 0
- 2023 0
What this shows Markwest Utica Emg LLC year-over-year reported totals (increased by 7% from 2022 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: n-Hexane.
| Year | Total | Chemicals |
|---|---|---|
| 2022 | 6.9K lbs | 3 |
| 2023 | 7.4K lbs | 3 |
Chemical Releases
Aggregated across all reporting years (2022–2023). 1 of 3 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| n-Hexane | 14.3K lbs | - |
| 1,3-Butadiene | 0 lbs | Carcinogen |
| Ethylene | 0 lbs | - |
Markwest Utica Emg LLC · AIR-pathway site
Nearest TRI Facilities to Markwest Utica Emg LLC
Closest other reporters in Ohio - including Utica Condensate Stabilization Facility (0634005057), Hopedale Fractionating Facility, Williams Harrison Hub Fractionation Plant (0634005028), ordered by distance.
Showing 8 of 1,298 other reporting facilities in Ohio.
Similar Natural Gas Processing Facilities
Other Natural Gas Processing facilities with similar total release volumes (±80%), outside Ohio - e.g. Stanberry Gas Plant, Northridge Gas Plant, Enable Products/clinton Natural Gas Processing Plant.
Compare beyond Ohio
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Markwest Utica Emg LLC on cumulative reported pounds (14.3K lbs) and distinct chemical count (3). Release-pound peers include Austemper Inc, Danfoss Power Solutions (us) Co, Cm Truck Beds - Madill. Chemical-count peers include Industrial C&s of Pr LLC Arecibo Plant, Island Litho Corp., Fenwal International Inc. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Marathon Petroleum Corp Facilities
Same-parent TRI sites ranked by reported releases - including Blanchard Refining Co LLC, Marathon Petroleum Co LP, Marathon Mandan Refinery.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include n-Hexane, 1,3-Butadiene, Ethylene; nearby reporters include Utica Condensate Stabilization Facility (0634005057). Markwest Utica Emg LLC stamps LIGHT volume · AIR pathway · CLEAN carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Markwest Utica Emg LLC TRI extract (LIGHT · AIR · CLEAN · lead n-Hexane) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Markwest Utica Emg LLC totals are self-reported EPCRA §313 estimates for Cadiz, OH, latest year 2023. Form-R rows span 2022–2023 (2 years). NAICS 211130 · Natural Gas Processing. 30.0% of Harrison TRI pounds in this extract. Nearest ABS peer: Austemper Inc (Δ 9 lbs). Pounds ≠ exposure.
Markwest Utica Emg LLC stamps LIGHT volume · AIR pathway · CLEAN · lead n-Hexane. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov