EPA TRI Facility · Natural Gas Processing
Mobile Bay Gas Plant
Coden, AL · Parent: The Williams Cos
- Total releases
- 422 lbs
- Chemicals reported
- 5
- Carcinogens
- 1
- Primary pathway
- Air Releases
Mobile Bay Gas Plant is an EPA Toxics Release Inventory reporter in Coden, AL, in the natural gas processing sector. It reported 422 lbs of releases across 5 chemicals, summed over every year it filed. That ranks 15,014 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Williams Mobile Bay Gas Processing Facility; W&t Offshore Inc.; Basf Trilon M; Skw Quab Chemicals. Similar-scale Natural Gas Processing peers outside Alabama: Wheeler Gas Plant; Andeavor Field Services LLC - Stanley Compressor Station; Mocane Cryogenic Plant; Hemphill Gas Plant. Other The Williams Cos sites in this extract: Mid-Continent Fractionation & Storage Conway Fra; Echo Springs Gas Plant; Opal Gas Plant; Discovery Producer Services:larose Cryogenic Plant. Largest disclosed chemicals by pounds: n-Hexane; Benzene; Toluene; Diethanolamine.
Mobile Bay Gas Plant has reported 422 lbs of toxic releases across 5 chemicals to the EPA Toxic Release Inventory, based on annual facility disclosures from 2019 through 2023. Of the chemicals reported, 1 is classified as carcinogen, representing 20% of the facility's chemical profile. The facility operates in the Natural Gas Processing sector. The primary release pathway is air releases, accounting for 72% of total releases. All release data shown below is self-reported to the EPA under the Emergency Planning and Community Right-to-Know Act (EPCRA) Section 313.
Where this facility sits in the TRI record
Among the 339 Natural Gas Processing facilities in this database, Mobile Bay Gas Plant reports the 319th-largest volume (422 lbs).
Placement is computed from reported TRI pounds in this database. Thresholds are fixed across every facility page: concentrated ≥60% of volume in one chemical, county-dominant ≥25% of the county total, carcinogen-heavy ≥50% of pounds. Share-based statements are shown only for sites reporting at least 1,000 lbs, because a share of a very small total is not a meaningful signal. Reported pounds are self-reported estimates and do not measure toxicity or health risk.
Mobile Bay Gas Plant files annual Form R disclosures to the EPA Toxics Release Inventory under EPCRA Section 313, classified under NAICS 211130 (Natural Gas Processing). Across 2 years of records spanning 2022–2023, the site has disclosed 422 lbs in cumulative toxic releases across 5 distinct chemicals, 1 of which (20%) carry a carcinogenic classification. Largest chemicals by pounds: n-Hexane; Benzene; Toluene; Diethanolamine.
The dominant release pathway is air releases at 303 lbs (71.9% of total volume), followed by off-site transfers at 28.1%. Between 2022 and 2023, reported totals decreased by 100% - from 422 lbs to 0 lbs. The facility is operated under parent company The Williams Cos alongside Mid-Continent Fractionation & Storage Conway Fra; Echo Springs Gas Plant; Opal Gas Plant; Discovery Producer Services:larose Cryogenic Plant. Nearest other TRI reporters: Williams Mobile Bay Gas Processing Facility; W&t Offshore Inc.; Basf Trilon M; Skw Quab Chemicals. Similar-scale peers outside Alabama: Wheeler Gas Plant; Andeavor Field Services LLC - Stanley Compressor Station; Mocane Cryogenic Plant; Hemphill Gas Plant.
TRI Form R values are self-reported estimates, not measured stack emissions, and treat every pound of reported chemical equally regardless of toxicity. Inclusion in the TRI database does not establish a health risk to nearby residents; it documents the annual reporting record that Mobile Bay Gas Plant has filed with the EPA under federal community right-to-know requirements - open Williams Mobile Bay Gas Processing Facility for a different chemical mix before treating volume as risk.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Mobile Bay Gas Plant's total reported releases fell from 422 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Mobile Bay Gas Plant's air releases fell from 303 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Mobile Bay Gas Plant's off-site transfers fell from 119 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Mobile Bay Gas Plant's chemicals reported fell from 5 in 2022 to 2 in 2023, based on EPA TRI filings.
Quick Facts
Compare this facility
See how Mobile Bay Gas Plant stacks up against nearby facilities and the typical reporter.
99% less than the comparison
2.5× more 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 Mobile Bay Gas Plant releases toxic chemicals into the environment. Total: 422 lbs.
Emissions Trend Summary
From 2022 to 2023, total releases decreased by 100% (422 lbs to 0 lbs).
Reported total releases by year
Mobile Bay Gas Plant - annual TRI totals
- 2022 0
2022
0 million lbs
- 2023 0
2023
0 million lbs
What this shows Year-over-year reported totals. TRI figures are self-reported estimates and can swing with production levels, waste-rock handling and reporting changes, not only with emissions controls.
| Year | Total | Chemicals |
|---|---|---|
| 2022 | 422 lbs | 5 |
| 2023 | 0 lbs | 2 |
Chemical Releases
Aggregated across all reporting years (2022–2023). 1 of 5 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| n-Hexane | 274 lbs | - |
| Benzene | 76 lbs | Carcinogen |
| Toluene | 72 lbs | - |
| Diethanolamine | 0 lbs | - |
| Ethylene glycol | 0 lbs | - |
Location
Nearest TRI Facilities to Mobile Bay Gas Plant
Closest other reporters in Alabama - including Williams Mobile Bay Gas Processing Facility, W&t Offshore Inc., Basf Trilon M, ordered by distance.
Similar Natural Gas Processing Facilities
Other Natural Gas Processing facilities with similar total release volumes (±80%), outside Alabama - e.g. Wheeler Gas Plant, Andeavor Field Services LLC - Stanley Compressor Station, Mocane Cryogenic Plant.
Other The Williams Cos Facilities
Same-parent TRI sites ranked by reported releases - including Mid-Continent Fractionation & Storage Conway Fra, Echo Springs Gas Plant, Opal Gas Plant.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
Data comes from the EPA Toxic Release Inventory (TRI) program. Facilities that manufacture, process, or otherwise use listed toxic chemicals above threshold amounts are required to report annually to the EPA.
On this page the largest disclosed chemicals include n-Hexane, Benzene, Toluene, Diethanolamine; nearby reporters include Williams Mobile Bay Gas Processing Facility. "Total releases" includes air, water, land, and off-site transfers for disposal, aggregated across available reporting years. Quantities are self-reported estimates, not measured stack emissions.
PlainEnviro presents this data without advocacy framing. The presence of a facility in the TRI database does not by itself indicate a health risk. For site-specific health questions, consult your local environmental or health agency.
Frequently Asked Questions
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Explore More Data for Alabama
What to do with this facility's data
From Mobile Bay Gas Plant, open Williams Mobile Bay Gas Processing Facility or Wheeler Gas Plant next rather than reading rank alone.
- See whether releases reported by Mobile Bay Gas Plant are rising or falling over time (watch n-Hexane in the chemical mix). View trends
- Compare Mobile Bay Gas Plant with nearby reporter Williams Mobile Bay Gas Processing Facility before treating rank as risk. Open Williams Mobile Bay Gas Processing Facility
- Cross-check similar-scale peer Wheeler Gas Plant outside Alabama. Open Wheeler Gas Plant
Rank and named neighbors (Williams Mobile Bay Gas Processing Facility, W&t Offshore Inc.) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Read our methodology - how this data is sourced, computed, and verified.
Related
Sources & how this page was built
Every figure on this page traces to public, federal-government data on Mobile Bay Gas Plant. The records below are the primary sources; our methodology explains how they are joined, computed, and verified.
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program, chemical & reporting reference - what each chemical is and how releases are counted. epa.gov
- EPA Facility Registry Service (FRS) - authoritative facility location and identity. epa.gov
- EPA Enforcement & Compliance History Online (ECHO) - regulatory and compliance context. echo.epa.gov
- EPA Envirofacts - the EPA data warehouse that exposes these datasets. enviro.epa.gov
Retrieved and formatted by PlainEnviro. TRI release totals are self-reported estimates, not measured stack emissions.
According to the U.S. Environmental Protection Agency, the Toxics Release Inventory has required annual industrial disclosure since its creation under the Emergency Planning and Community Right-to-Know Act in October 1986, and this facility's record is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities through the 2023 reporting year; see our methodology for full source citations and refresh cadence.