EPA TRI Facility · Electric Utilities
Prepa - San Juan Steam Plant
Puerto Nuevo, PR · Parent: Puerto Rico Electric Power Authority
- Total releases
- 436.1K lbs
- Chemicals reported
- 9
- Carcinogens
- 2
- Primary pathway
- Air Releases
AIR Form-R mix
Prepa - San Juan Steam Plant: how the 499.1K lbs splits
499.1K lbs across all reported pathways
- Air Releases 499.1K lbs 100.0%
- Water Discharges 31 lbs <0.1%
- Off-site Transfers 6 lbs <0.1%
- Land Disposal 0 lbs <0.1%
Prepa - San Juan Steam Plant's 499.1K lbs Form-R total is AIR - air releases is 100.0% of the bar. Next segment: water discharges at <0.1%. Leading chemical by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
MID volume AIR pathway TRACE-CARC
Prepa - San Juan Steam Plant is an EPA Toxics Release Inventory reporter in Puerto Nuevo, PR, in the electric utilities sector. It reported 63.1K lbs of releases across 6 chemicals in 2024, and 436.1K lbs in total across its 2019-2024 reporting years. That ranks 2,111 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Puerto Rico's 104 reporting TRI sites, pounds #1 is not chemical-count #1. Prepa - San Juan Steam Plant is pounds #10 and chemical-count #14 at 436.1K lbs. Ecw Landfill Corp. leads reported pounds (8.3M lbs) at 2 chemicals (chemical-count #41). Aes Puerto Rico LP leads chemical count at 25 chemicals (6.5M lbs, pounds #2). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Westrock-Puerto Rico Inc; Best Petroleum Corp Bulk Terminal; Suiza Dairy Corp; Puerto Rico Energy LLC - Guaynabo 2 Terminal. Similar-scale Electric Utilities peers outside Puerto Rico: Maui Electric Co Ltd Maalaea Generating Station; Gorgas Steam Plant; U.S. Tva Magnolia Combined Cycle Plant; Pge Beaver Plant & Port Westward Plant. Other Puerto Rico Electric Power Authority sites in this extract: Prepa - Aguirre Power Generati on Complex; Prepa-South Coast Power Plant; Prepa - Palo Seco Steam Plant; Prepa-Cambalache Combustion Turbine Plant. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Ammonia; Copper And Copper Compounds; Naphthalene.
Prepa - San Juan Steam Plant stamps MID volume with a dominant AIR pathway (100.0% air releases) across 9 chemicals · 2 carcinogen-classified. Cumulative Form-R extract: 436.1K lbs (2019–2024). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Maui Electric Co Ltd Maalaea Generating Station and Gorgas Steam Plant.
Prepa - San Juan Steam Plant vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
436K lbs Top 8% higher than 92% 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
Prepa - San Juan Steam Plant inside San Juan Municipio's TRI pounds
Among the 513 Electric Utilities facilities in this database, Prepa - San Juan Steam Plant reports the 248th-largest volume (436.1K lbs). This one site accounts for 88.7% of every pound reported in San Juan Municipio. Its reported volume is concentrated rather than spread: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) alone is 68.9% of the total. Scale peers outside Puerto Rico include Maui Electric Co Ltd Maalaea Generating Station and Gorgas Steam Plant.
County-dominant here means ≥25% of San Juan Municipio's reported pounds (491.6K lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Prepa - San Juan Steam Plant's total reported releases fell from 117.1 thousand lb in 2022 to 74.8 thousand lb in 2023, based on EPA TRI filings.
- Prepa - San Juan Steam Plant's air releases fell from 117.1 thousand lb in 2022 to 74.8 thousand lb in 2023, based on EPA TRI filings.
Prepa - San Juan Steam Plant Form-R facts
Compare this facility
See how Prepa - San Juan Steam Plant stacks up against nearby facilities and the typical reporter.
20700964.5× more than the comparison
4.5× 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 Prepa - San Juan Steam Plant releases toxic chemicals into the environment. Total: 499.1K lbs.
Emissions Trend Summary
From 2019 to 2024, total releases increased by 13% (55.7K lbs to 63.1K lbs).
Prepa - San Juan Steam Plant: annual Form-R pounds
MID site · AIR pathway · TRI years 2019–2024
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
- 2024 0
What this shows Prepa - San Juan Steam Plant year-over-year reported totals (increased by 13% from 2019 to 2024). 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: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 55.7K lbs | 7 |
| 2020 | 97.6K lbs | 6 |
| 2021 | 90.8K lbs | 7 |
| 2022 | 117.1K lbs | 6 |
| 2023 | 74.8K lbs | 6 |
| 2024 | 63.1K lbs | 6 |
Chemical Releases
Aggregated across all reporting years (2019–2024). 2 of 10 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 343.9K lbs | - |
| Ammonia | 130.7K lbs | - |
| Copper And Copper Compounds | 20.4K lbs | - |
| Naphthalene | 1.7K lbs | Carcinogen |
| Polycyclic aromatic compounds | 1.4K lbs | Carcinogen |
| Lead And Lead Compounds | 855 lbs | - |
| Lead compounds | 72 lbs | - |
| Mercury And Mercury Compounds | 35 lbs | - |
| Mercury compounds | 11 lbs | - |
| Benzo[g,h,i]perylene | 5 lbs | - |
Prepa - San Juan Steam Plant · AIR-pathway site
Nearest TRI Facilities to Prepa - San Juan Steam Plant
Closest other reporters in Puerto Rico - including Westrock-Puerto Rico Inc, Best Petroleum Corp Bulk Terminal, Suiza Dairy Corp, ordered by distance.
Showing 8 of 103 other reporting facilities in Puerto Rico.
Similar Electric Utilities Facilities
Other Electric Utilities facilities with similar total release volumes (±80%), outside Puerto Rico - e.g. Maui Electric Co Ltd Maalaea Generating Station, Gorgas Steam Plant, U.S. Tva Magnolia Combined Cycle Plant.
Compare beyond Puerto Rico
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Prepa - San Juan Steam Plant on cumulative reported pounds (436.1K lbs) and distinct chemical count (9). Release-pound peers include Ab&i Foundry, Kovalus Separation Solutions Inc., Allnex USA Inc. Wallingford Ct Site. Chemical-count peers include Solutia Inc, O'Connell Oil Co Merrill Road Facility, Univar Solutions USA - Tewksbury Ma. 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.
- Ab&i Foundry Oakland, CA · Primary Metals 436.1K lbs reported
- Kovalus Separation Solutions Inc. Wilmington, MA · Miscellaneous Manufacturing 436.5K lbs reported
- Allnex USA Inc. Wallingford Ct Site Wallingford, CT · Chemicals 436.7K lbs reported
- Maui Electric Co Ltd Maalaea Generating Station Kihei, HI · Electric Utilities 435.5K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Solutia Inc Springfield, MA · Plastics and Rubber 9 chemicals
- O'Connell Oil Co Merrill Road Facility Pittsfield, MA · Petroleum Bulk Terminals 9 chemicals
- Univar Solutions USA - Tewksbury Ma Tewksbury, MA · Chemical Wholesalers 9 chemicals
- Houghton Chemical Corp Allston, MA · Chemical Wholesalers 9 chemicals
Other Puerto Rico Electric Power Authority Facilities
Same-parent TRI sites ranked by reported releases - including Prepa - Aguirre Power Generati on Complex, Prepa-South Coast Power Plant, Prepa - Palo Seco Steam Plant.
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 Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Ammonia, Copper And Copper Compounds, Naphthalene; nearby reporters include Westrock-Puerto Rico Inc. Prepa - San Juan Steam Plant stamps MID volume · AIR pathway · TRACE-CARC 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 Prepa - San Juan Steam Plant TRI extract (MID · AIR · TRACE-CARC · lead Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Prepa - San Juan Steam Plant totals are self-reported EPCRA §313 estimates for Puerto Nuevo, PR, latest year 2023. Form-R rows span 2019–2024 (6 years). NAICS 221112 · Electric Utilities. 88.7% of San Juan Municipio TRI pounds in this extract. Nearest ABS peer: Ab&i Foundry (Δ 59 lbs). Pounds ≠ exposure.
Prepa - San Juan Steam Plant stamps MID volume · AIR pathway · TRACE-CARC · lead Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size). 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