St. Lawrence County, NY
The federal environmental record for St. Lawrence County (population 106,940): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
2
Superfund NPL sites
10
federal cleanup sites
1
PFAS-detecting water systems
13
TRI facilities
44
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| General Motors (Central Foundry Division) | Massena | on the NPL | 09/21/1984 |
| Sealand Restoration, Inc. | Lisbon | on the NPL | 08/30/1990 |
Drinking water: PFAS testing
Public water systems serving St. Lawrence with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| OGDENSBURG CITY NY4404394 | PFBA: 5.1 ng/L PFHxA: 4.1 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
13 facilities in St. Lawrence filed TRI reports for 2024, totalling 2.7M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| ST LAWRENCE ZINC CO BALMAT 4 MINE & MILL | GOUVERNEUR | Zinc compounds, Lead And Lead Compounds | 2.0M lb |
| ALCOA USA CORP. | MASSENA | Carbonyl sulfide, Hydrogen fluoride | 571k lb |
| NORTH COUNTRY DAIRY LLC | NORTH LAWRENCE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 105k lb |
| HOOSIER MAGNETICS INC | OGDENSBURG | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 2k lb |
| LOSURDO FOODS INC HEUV | HEUVELTON | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 2k lb |
| CORNING INC | CANTON | Lead And Lead Compounds | 245 lb |
| CIVES STEEL CO NORTHERN DIV | GOUVERNEUR | Manganese | 46 lb |
| POTTERS INDUSTRIES LLC | POTSDAM | Lead | 4 lb |
| VANDERBILT MINERALS LLC - GOUVERNEUR MINERALS DIV | GOUVERNEUR | Lead | 2 lb |
| ANSEN CORP | OGDENSBURG | Lead And Lead Compounds | 2 lb |
| APC PAPER CO OF NEW YORK | NORFOLK | - | 0 lb |
| BESTWAY OF NEW YORK INC | GOUVERNEUR | - | 0 lb |
| DUNN PAPER - NATURAL DAM LLC | GOUVERNEUR | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 538 tank facilities in St. Lawrence: 190 tanks in service and 1,453 closed. 367 fuel releases are on record, of which 44 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps St. Lawrence as Zone 2, moderate predicted indoor radon (2 to 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for St. Lawrence, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ALCOA AGGREGATION SITEMASSENA
- FORMER STANDARD SHADE ROLLER NEWELL CO. SITEOGDENSBURG
- GENERAL MOTORS (CENTRAL FOUNDRY DIVISION)MASSENA
- NORTH LAWRENCE OIL DUMPLAWRENCE
- REYNOLDS METALS COMASSENA
- SEALAND RESTORATION, INC.LISBON
- ST LAWRENCE PULP & PAPER CORPOGDENSBURG
- ST. LAWRENCE SEAWAY CORPORATION-EISENHOWER LOCKMASSENA
- TOOBRO CHEESE, OGDENSBURG NYOGDENSBURG
- WASTE STREAM, INC.POTSDAM