US Marine Corps Air Station Miramar – Emissions Trend
San Diego, CA · 2019–2023 · Parent: US Department of Defense
This page assembles 5 consecutive years of EPA Toxics Release Inventory Form R filings for US Marine Corps Air Station Miramar, spanning 2019–2023. 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 42.9K in 2019 and closed at 23.4K in 2023 – a decrease of 45.3% 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 Lead at 130.8K, followed by Copper at 18.7K.
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 other facility.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- US Marine Corps Air Station Miramar's total reported releases rose from 19.5 thousand lb in 2022 to 23.4 thousand lb in 2023, based on EPA TRI filings.
- US Marine Corps Air Station Miramar's off-site transfers rose from 134 lb in 2022 to 522 lb in 2023, based on EPA TRI filings.
- US Marine Corps Air Station Miramar's air releases fell from 202 lb in 2022 to 114 lb in 2023, based on EPA TRI filings.
- US Marine Corps Air Station Miramar's land releases rose from 19.1 thousand lb in 2022 to 22.8 thousand lb in 2023, based on EPA TRI filings.
Total Releases by Category
Year-over-Year Comparison
| Year | Total | Chemicals | YoY Change |
|---|---|---|---|
| 2019 | 42.9K lbs | 3 | - |
| 2020 | 29.3K lbs | 2 | -31.7% |
| 2021 | 36.3K lbs | 4 | +23.9% |
| 2022 | 19.5K lbs | 3 | -46.4% |
| 2023 | 23.4K lbs | 3 | +20.5% |
Top Chemicals by Year
| Chemical | 2019 | 2020 | 2021 | 2022 | 2023 | Total |
|---|---|---|---|---|---|---|
| Lead | 36.1K | 23.1K | 29.3K | 19.2K | 23.2K | 130.8K |
| Copper | 6.6K | 6.2K | 5.9K | - | - | 18.7K |
| Certain glycol ethers | - | - | 1.0K | - | - | 1.0K |
| Naphthalene | 159 | - | 126 | 125 | 177 | 587 |
| Ethylbenzene | - | - | - | 122 | 81 | 203 |
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
Is US Marine Corps Air Station Miramar getting cleaner or dirtier? ▼
What time period does this trend data cover? ▼
Read our methodology - how this data is sourced, computed, and verified.