County page
Cerro Gordo County
Cerro Gordo County currently shows 1 Superfund site, 58 imported facility profiles, and 279,537 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 Cerro Gordo County.
The latest loaded TRI year is 2024, with 279,537 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
Mason City Coal Gasification Plant
Mason City Coal Gasification Plant is in EPA's Superfund layer for Mason City, IA. Live ingestion currently includes the official EPA detail links and geocoded site record.
Facilities
Worst polluters and compliance pressure
Heidelberg Materials Us Cement Llc
Significant Violation across 12 of the last 12 quarters, with $197,500 in recorded penalties.
Curries Division of Aadg, Inc - 12th St Nw
No Violation Identified across 1 of the last 12 quarters, with $12,500 in recorded penalties.
Clear Lake Sanitary District
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Golden Grain Energy, Llc
Significant noncompliance across 5 of the last 12 quarters in the imported ECHO record.
Woodharbor Custom Cabinetry
No Violation Identified across 1 of the last 12 quarters, with $13,750 in recorded penalties.
Buffalo Run Golf Club
Violation Identified across 11 of the last 12 quarters in the imported ECHO record.
Luckys Last Resort Campground
Violation Identified across 10 of the last 12 quarters in the imported ECHO record.
Plymouth Water Supply-plant #1
Violation Identified across 10 of the last 12 quarters in the imported ECHO record.
United Parcel Service
No Violation Identified with $5,300,000 in recorded penalties.
Plymouth City of Stp
Violation Identified across 8 of the last 12 quarters in the imported ECHO record.
Pine Creek Golf Course-plant #1
Significant noncompliance across 8 of the last 12 quarters in the imported ECHO record.
Thornton City of Stp
Violation Identified across 7 of the last 12 quarters in the imported ECHO record.
Mason Wwtp
Significant noncompliance across 6 of the last 12 quarters in the imported ECHO record.
Ag Processing Incorporated
No Violation Identified. Last recorded ECHO inspection: 2024-12-20.
Kraft Foods Global Inc - Mason City
No Violation Identified. Last recorded ECHO inspection: 2006-03-30.
Rockwell Water Supply-plant #1
Significant noncompliance across 4 of the last 12 quarters in the imported ECHO record.
Reg Mason City
No Violation Identified. Last recorded ECHO inspection: 2025-03-25.
Five Star Cooperative - Mason City
Under review with $360 in recorded penalties.
Lakeshore Water Association
No Violation Identified across 3 of the last 12 quarters in the imported ECHO record.
Oak Hills Par 30 Golf Course
No Violation Identified across 3 of the last 12 quarters in the imported ECHO record.
| Chemical | Group | Facilities | Total pounds |
|---|---|---|---|
| n-Hexane | TRI-listed chemical | 2 | 128,881 lbs |
| Certain glycol ethers | TRI-listed chemical | 1 | 47,102 lbs |
| Chlorodifluoromethane (HCFC-22) | TRI-listed chemical | 1 | 25,000 lbs |
| n-Butyl alcohol | TRI-listed chemical | 1 | 19,225 lbs |
| Xylene (mixed isomers) | Volatile organic compound | 2 | 14,194 lbs |
| Styrene | Volatile organic compound | 1 | 12,358 lbs |
| Acetaldehyde | TRI-listed chemical | 1 | 11,758 lbs |
| Aluminum (fume or dust) | TRI-listed chemical | 1 | 8,040 lbs |
| Methanol | TRI-listed chemical | 2 | 6,586 lbs |
| Ammonia | TRI-listed chemical | 1 | 6,146 lbs |
| Lead compounds | Metals and metal compounds | 1 | 76 lbs |
| Manganese compounds | TRI-listed chemical | 2 | 56 lbs |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | Metals and metal compounds | 1 | 38 lbs |
| Nickel compounds | Metals and metal compounds | 1 | 36 lbs |
| Arsenic compounds | TRI-listed chemical | 1 | 17 lbs |
| Cadmium compounds | TRI-listed chemical | 1 | 12 lbs |
| Zinc compounds | TRI-listed chemical | 2 | 9 lbs |
| Mercury compounds | TRI-listed chemical | 1 | 3 lbs |
| Nickel | Metals and metal compounds | 1 | 0 lbs |
| Manganese | TRI-listed chemical | 1 | 0 lbs |
Violation pages
State-level violation context tied to this county
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Clean Air Act violations in Iowa
Iowa facilities in the imported ECHO data show air-program oversight, inspections, or noncompliance signals.
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Clean Water Act violations in Iowa
Iowa facilities in the imported ECHO data show water-permit pressure, inspections, or noncompliance signals.
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RCRA violations in Iowa
Iowa facilities in the imported ECHO data show hazardous-waste or RCRA oversight signals.