County page
Grant County
Grant County currently shows 0 Superfund sites, 14 imported facility profiles, and 425,039 lbs in loaded TRI releases.
Overview
What this county page is saying
This live county page is generated from the ingested EPA datasets. It merges ECHO facility compliance rows, TRI release totals, and any Superfund sites attached to Grant County.
The latest loaded TRI year is 2024, with 425,039 lbs in county-level on-site releases tied to the imported facility set.
Focus points
Design and product notes
County pages combine facility compliance history with chemical release totals.
TRI chemistry shows what is being reported, while ECHO shows who keeps drawing enforcement attention.
Superfund records add legacy cleanup context even when live contaminant detail is still sparse.
Superfund layer
Cleanup sites in this county
Facilities
Worst polluters and compliance pressure
Valley Queen Cheese Factory, Inc.
Violation Identified across 3 of the last 12 quarters, with $29,917 in recorded penalties.
Otter Tail Power Co - Big Stone Power Plant
No Violation Identified. Last recorded ECHO inspection: 2025-09-10.
Poet Biorefining Big Stone
No Violation Identified
Labolt, Town of
No Violation Identified across 3 of the last 12 quarters in the imported ECHO record.
Milbank, City of
No Violation Identified across 2 of the last 12 quarters in the imported ECHO record.
Marvin
No Violation Identified across 1 of the last 12 quarters in the imported ECHO record.
Big Stone City, City of
No Violation Identified. Last recorded ECHO inspection: 2022-08-31.
Milbank Wastewater Trmt Plnt
Under review. Last recorded ECHO inspection: 2022-08-31.
Milbank, City of (biosolids)
No Violation Identified. Last recorded ECHO inspection: 2024-08-16.
Revillo, Town of
No Violation Identified. Last recorded ECHO inspection: 2025-07-17.
Stockholm - City of
No Violation Identified. Last recorded ECHO inspection: 2024-07-23.
Strandburg, Town of
No Violation Identified. Last recorded ECHO inspection: 2024-07-23.
United Hardware
No Violation Identified. Last recorded ECHO inspection: 2022-05-03.
Gcc-big Stone City
No violation identified
| Chemical | Group | Facilities | Total pounds |
|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | TRI-listed chemical | 1 | 349,935 lbs |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | TRI-listed chemical | 1 | 22,726 lbs |
| Manganese compounds | TRI-listed chemical | 1 | 15,183 lbs |
| Ammonia | TRI-listed chemical | 2 | 10,876 lbs |
| Acetaldehyde | TRI-listed chemical | 1 | 6,697 lbs |
| Methanol | TRI-listed chemical | 1 | 6,330 lbs |
| Lead compounds | Metals and metal compounds | 2 | 3,221 lbs |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | TRI-listed chemical | 1 | 3,130 lbs |
| n-Hexane | TRI-listed chemical | 1 | 2,710 lbs |
| Formic acid | TRI-listed chemical | 1 | 2,200 lbs |
| Hydrogen fluoride | TRI-listed chemical | 1 | 1,920 lbs |
| Mercury compounds | TRI-listed chemical | 1 | 91 lbs |
| Peracetic acid | TRI-listed chemical | 1 | 10 lbs |
| Nitric acid | TRI-listed chemical | 1 | 10 lbs |
| Benzene | Volatile organic compound | 1 | 0 lbs |
| Cyclohexane | TRI-listed chemical | 1 | 0 lbs |
| Toluene | Volatile organic compound | 1 | 0 lbs |
| Dioxin and dioxin-like compounds | TRI-listed chemical | 1 | 0 lbs |
| Benzo[g, h, i]perylene | TRI-listed chemical | 1 | 0 lbs |
Violation pages
State-level violation context tied to this county
-
Clean Air Act violations in South Dakota
South Dakota facilities in the imported ECHO data show air-program oversight, inspections, or noncompliance signals.
-
Clean Water Act violations in South Dakota
South Dakota facilities in the imported ECHO data show water-permit pressure, inspections, or noncompliance signals.
-
RCRA violations in South Dakota
South Dakota facilities in the imported ECHO data show hazardous-waste or RCRA oversight signals.