EPA TRI Facility · Electric Utilities
Prepa - Palo Seco Steam Plant
Toa Baja, PR · Parent: Puerto Rico Electric Power Authority
- Total releases
- 658.5K lbs
- Chemicals reported
- 5
- Carcinogens
- 2
- Primary pathway
- Air Releases
AIR Form-R mix
Prepa - Palo Seco Steam Plant: how the 712.2K lbs splits
712.2K lbs across all reported pathways
- Air Releases 711.9K lbs 100.0%
- Off-site Transfers 290 lbs <0.1%
- Water Discharges 9 lbs <0.1%
- Land Disposal 0 lbs <0.1%
Prepa - Palo Seco Steam Plant's 712.2K lbs Form-R total is AIR - air releases is 100.0% of the bar. Next segment: off-site transfers 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 - Palo Seco Steam Plant is an EPA Toxics Release Inventory reporter in Toa Baja, PR, in the electric utilities sector. It reported 53.8K lbs of releases across 5 chemicals in 2024, and 658.5K lbs in total across its 2019-2024 reporting years. That ranks 1,657 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 - Palo Seco Steam Plant is pounds #9 and chemical-count #24 at 658.5K 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: Mays Chemical Co of Pr DBA Mays Ochoa; Water Treatment Specialist Inc; Bacardi Corp; Petroleum Products Supply LLC. Similar-scale Electric Utilities peers outside Puerto Rico: American Electric Power Northeastern Plant; Montour Steam Electric Station; U.S. Tva Caledonia Combined Cycle Plant; Xcel Energy Bay Front Plant. Other Puerto Rico Electric Power Authority sites in this extract: Prepa - Aguirre Power Generati on Complex; Prepa-South Coast Power Plant; Prepa - San Juan 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); Naphthalene; Lead And Lead Compounds; Polycyclic aromatic compounds.
Prepa - Palo Seco Steam Plant stamps MID volume with a dominant AIR pathway (100.0% air releases) across 5 chemicals · 2 carcinogen-classified. Cumulative Form-R extract: 658.5K lbs (2019–2024). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include American Electric Power Northeastern Plant and Montour Steam Electric Station.
Prepa - Palo Seco Steam Plant vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
658K lbs Top 6% higher than 94% 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 - Palo Seco Steam Plant inside Toa Baja Municipio's TRI pounds
Among the 513 Electric Utilities facilities in this database, Prepa - Palo Seco Steam Plant reports the 215th-largest volume (658.5K lbs). This one site accounts for 100% of every pound reported in Toa Baja 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 99.6% of the total. Scale peers outside Puerto Rico include American Electric Power Northeastern Plant and Montour Steam Electric Station.
County-dominant here means ≥25% of Toa Baja Municipio's reported pounds (658.5K lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Prepa - Palo Seco Steam Plant's total reported releases fell from 148.3 thousand lb in 2022 to 132.1 thousand lb in 2023, based on EPA TRI filings.
- Prepa - Palo Seco Steam Plant's off-site transfers fell from 163 lb in 2022 to 94 lb in 2023, based on EPA TRI filings.
- Prepa - Palo Seco Steam Plant's air releases fell from 148.2 thousand lb in 2022 to 132.0 thousand lb in 2023, based on EPA TRI filings.
Prepa - Palo Seco Steam Plant Form-R facts
Compare this facility
See how Prepa - Palo Seco Steam Plant stacks up against nearby facilities and the typical reporter.
2655.1× more than the comparison
17% 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 Prepa - Palo Seco Steam Plant releases toxic chemicals into the environment. Total: 712.2K lbs.
Emissions Trend Summary
From 2019 to 2024, total releases decreased by 49% (104.7K lbs to 53.8K lbs).
Prepa - Palo Seco 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 - Palo Seco Steam Plant year-over-year reported totals (decreased by 49% 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 | 104.7K lbs | 5 |
| 2020 | 161.0K lbs | 5 |
| 2021 | 112.4K lbs | 5 |
| 2022 | 148.3K lbs | 5 |
| 2023 | 132.1K lbs | 5 |
| 2024 | 53.8K lbs | 5 |
Chemical Releases
Aggregated across all reporting years (2019–2024). 2 of 6 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) | 709.5K lbs | - |
| Naphthalene | 1.2K lbs | Carcinogen |
| Lead And Lead Compounds | 913 lbs | - |
| Polycyclic aromatic compounds | 562 lbs | Carcinogen |
| Lead compounds | 102 lbs | - |
| Benzo[g,h,i]perylene | 2 lbs | - |
Prepa - Palo Seco Steam Plant · AIR-pathway site
Nearest TRI Facilities to Prepa - Palo Seco Steam Plant
Closest other reporters in Puerto Rico - including Mays Chemical Co of Pr DBA Mays Ochoa, Water Treatment Specialist Inc, Bacardi 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. American Electric Power Northeastern Plant, Montour Steam Electric Station, U.S. Tva Caledonia Combined Cycle Plant.
Compare beyond Puerto Rico
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Prepa - Palo Seco Steam Plant on cumulative reported pounds (658.5K lbs) and distinct chemical count (5). Release-pound peers include Sanderson Farms St. Pauls Processing, American Electric Power Northeastern Plant, Volkswagen Group of America Chattanooga Operations Llc.. Chemical-count peers include Cruzan Rum Ltd., Specialty Minerals Inc, Mexichem Specialty Compounds. 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.
- Sanderson Farms St. Pauls Processing Saint Pauls, NC · Food 658.8K lbs reported
- American Electric Power Northeastern Plant Oologah, OK · Electric Utilities 659.5K lbs reported
- Volkswagen Group of America Chattanooga Operations Llc. Chattanooga, TN · Transportation Equipment 659.6K lbs reported
- Montour Steam Electric Station Danville, PA · Electric Utilities 657.1K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Cruzan Rum Ltd. Frederiksted, VI · Beverages 5 chemicals
- Specialty Minerals Inc Adams, MA · Nonmetallic Mineral Product 5 chemicals
- Mexichem Specialty Compounds Leominster, MA · Chemicals 5 chemicals
- Saint-Gobain Abrasives & Saint -Gobain Ceramics & Plastics Worcester, MA · Nonmetallic Mineral Product 5 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 - San Juan 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), Naphthalene, Lead And Lead Compounds, Polycyclic aromatic compounds; nearby reporters include Mays Chemical Co of Pr DBA Mays Ochoa. Prepa - Palo Seco 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 - Palo Seco 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 - Palo Seco Steam Plant totals are self-reported EPCRA §313 estimates for Toa Baja, PR, latest year 2023. Form-R rows span 2019–2024 (6 years). NAICS 221112 · Electric Utilities. 100% of Toa Baja Municipio TRI pounds in this extract. Nearest ABS peer: Sanderson Farms St. Pauls Processing (Δ 324 lbs). Pounds ≠ exposure.
Prepa - Palo Seco 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