Northampton Generating Plant – Emissions Trend
Northampton, PA · 2019–2024 · Parent: Olympus Power LLC
This page assembles 6 consecutive years of EPA Toxics Release Inventory Form R filings for Northampton Generating Plant, spanning 2019–2024. Each annual total aggregates on-site air emissions, surface-water discharges, land disposal, and off-site transfers reported by the facility under EPCRA Section 313, which requires disclosure whenever a listed chemical is manufactured, processed, or otherwise used above threshold quantities.
Reported releases opened at 409.0K in 2019 and closed at 735.9K in 2024 – a increase of 79.9% over the window. The chart below stacks the four TRI release media (air, water, land, off-site) and overlays the yearly total. The top contributor by cumulative mass is Zinc compounds at 1.2M, followed by Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) at 531.6K.
Because TRI figures are estimated, not metered, year-over-year deltas can reflect methodology revisions, ownership changes, or shifts in what a facility classifies as reportable, not only physical emission changes. Treat the trajectory as a disclosure record, and cross-reference with the EPA Enforcement and Compliance History Online (ECHO) system for the fuller regulatory picture on this electric utilities facility.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Northampton Generating Plant's total reported releases fell from 817.1 thousand lb in 2022 to 734.7 thousand lb in 2023, based on EPA TRI filings.
- Northampton Generating Plant's water releases fell from 59 lb in 2022 to 25 lb in 2023, based on EPA TRI filings.
- Northampton Generating Plant's off-site transfers fell from 670.7 thousand lb in 2022 to 575.4 thousand lb in 2023, based on EPA TRI filings.
- Northampton Generating Plant's air releases rose from 146.3 thousand lb in 2022 to 159.3 thousand lb in 2023, based on EPA TRI filings.
Total Releases by Category
Year-over-Year Comparison
| Year | Total | Chemicals | YoY Change |
|---|---|---|---|
| 2019 | 409.0K lbs | 8 | - |
| 2020 | 521 lbs | 1 | -99.9% |
| 2021 | 163.8K lbs | 6 | +31342.3% |
| 2022 | 817.1K lbs | 12 | +398.7% |
| 2023 | 734.7K lbs | 12 | -10.1% |
| 2024 | 735.9K lbs | 12 | +0.2% |
Top Chemicals by Year
| Chemical | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | Total |
|---|---|---|---|---|---|---|---|
| Zinc compounds | 288.7K | - | 127.0K | 367.1K | 181.1K | 187.8K | 1.2M |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 50.6K | - | 31.1K | 141.6K | 154.2K | 154.1K | 531.6K |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | - | - | - | 107.3K | - | 148.0K | 255.3K |
| Manganese | - | - | - | 61.1K | 76.2K | 78.1K | 215.4K |
| Barium And Barium Compounds | 35.4K | - | - | - | 154.1K | - | 189.5K |
| Vanadium compounds | - | - | - | 30.6K | 37.8K | 40.4K | 108.7K |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | - | - | - | 46.1K | - | 55.3K | 101.4K |
| Copper compounds | - | - | - | 35.4K | - | 39.8K | 75.2K |
| Lead compounds | 9.1K | - | - | 23.2K | - | 25.7K | 58.0K |
| Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | - | - | - | - | 57.6K | - | 57.6K |
| Copper And Copper Compounds | - | - | - | - | 40.8K | - | 40.8K |
| Lead And Lead Compounds | - | 521 | 5.2K | - | 26.8K | - | 32.5K |
| Manganese compounds | 24.5K | - | - | - | - | - | 24.5K |
| Hydrogen fluoride | - | - | - | 3.0K | 3.3K | 3.3K | 9.7K |
| Ammonia | 674 | - | 485 | 1.5K | 2.4K | 3.0K | 8.1K |
About This Data
Trend data is sourced from the EPA Toxic Release Inventory (TRI). Facilities report annually. Release quantities are self-reported estimates. Year-over-year changes may reflect changes in production, pollution control measures, reporting methodology, or chemical thresholds.
A decrease in reported releases does not necessarily indicate improved environmental performance, as it may reflect production cutbacks, facility closures, or changes in reporting requirements. Similarly, increases may reflect expanded production rather than degraded environmental practices.
Frequently Asked Questions
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Read our methodology - how this data is sourced, computed, and verified.