St Lawrence Zinc Co Balmat 4 Mine & Mill – Emissions Trend
Gouverneur, NY · 2019–2024
This page assembles 6 consecutive years of EPA Toxics Release Inventory Form R filings for St Lawrence Zinc Co Balmat 4 Mine & Mill, 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 1.4M in 2019 and closed at 2.0M in 2024 – a increase of 43.2% 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 9.6M, followed by Lead And Lead Compounds at 1.5M.
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 metal mining facility.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- St Lawrence Zinc Co Balmat 4 Mine & Mill's total reported releases fell from 2.7 million lb in 2022 to 2.2 million lb in 2023, based on EPA TRI filings.
- St Lawrence Zinc Co Balmat 4 Mine & Mill's air releases rose from 30.1 thousand lb in 2022 to 37.0 thousand lb in 2023, based on EPA TRI filings.
- St Lawrence Zinc Co Balmat 4 Mine & Mill's water releases fell from 1.1 thousand lb in 2022 to 928 lb in 2023, based on EPA TRI filings.
- St Lawrence Zinc Co Balmat 4 Mine & Mill's land releases fell from 2.6 million lb in 2022 to 2.2 million lb in 2023, based on EPA TRI filings.
Total Releases by Category
Year-over-Year Comparison
| Year | Total | Chemicals | YoY Change |
|---|---|---|---|
| 2019 | 1.4M lbs | 6 | - |
| 2020 | 1.6M lbs | 6 | +12.1% |
| 2021 | 1.8M lbs | 6 | +15.6% |
| 2022 | 2.7M lbs | 6 | +44.9% |
| 2023 | 2.2M lbs | 6 | -16.7% |
| 2024 | 2.0M lbs | 6 | -8.4% |
Top Chemicals by Year
| Chemical | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | Total |
|---|---|---|---|---|---|---|---|
| Zinc compounds | 1.3M | 1.4M | 1.5M | 2.1M | 1.7M | 1.5M | 9.6M |
| Lead And Lead Compounds | - | - | 204.6K | 447.1K | 385.8K | 424.3K | 1.5M |
| Cadmium And Cadmium Compounds | - | - | 83.7K | 89.2K | 83.2K | 72.9K | 329.0K |
| Lead compounds | 75.7K | 111.4K | - | - | - | - | 187.1K |
| Cadmium compounds | 42.2K | 57.6K | - | - | - | - | 99.9K |
| Copper And Copper Compounds | - | - | 22.2K | 10.6K | 15.7K | 15.7K | 64.3K |
| Copper compounds | 15.9K | 20.3K | - | - | - | - | 36.2K |
| Mercury And Mercury Compounds | - | - | 1.9K | 2.5K | 2.0K | 1.8K | 8.2K |
| Mercury compounds | 1.7K | 1.8K | - | - | - | - | 3.4K |
| Cyanide compounds | 167 | 243 | 300 | 329 | 340 | 312 | 1.7K |
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 St Lawrence Zinc Co Balmat 4 Mine & Mill getting cleaner or dirtier? ▼
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Read our methodology - how this data is sourced, computed, and verified.