Cerro Gordo, IA
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Cerro Gordo in Iowa · Population: 42,785
TRI sites such as Ag Processing Inc; Kraft Heinz Foods Co; Curries Div of Aadg Inc.; SDWIS systems such as MASON CITY WATER DEPARTMENT; CLEAR LAKE WATER DEPARTMENT; ROCKWELL WATER SUPPLY; NPL sites such as Mason City Coal Gasification Plant; Northwestern States Portland Cement Co. anchor Cerro Gordo, IA's EPA extract. Derived burden score 41/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Ag Processing Inc; Kraft Heinz Foods Co; Curries Div of Aadg Inc. are among the largest Form R filers reporting in Cerro Gordo; no SDWIS system here carries an active health-based flag. AQS median AQI 19 / peak 56 in 2023.
Burden score 41/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Cerro Gordo -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Cerro Gordo, IA: EPA TRI 2023 reporting year
Same facilities, both years
-11.3%
9 facilities that filed in 2022 and 2023
Whole inventory
-11.3%
203.2 thousand lb → 180.2 thousand lb, every facility that filed
- Cerro Gordo, IA's total reported releases fell from 203.2 thousand lb in 2022 to 180.2 thousand lb in 2023, based on EPA TRI filings.
- Cerro Gordo, IA's land releases rose from 3 lb in 2022 to 3.1 thousand lb in 2023, based on EPA TRI filings.
- Cerro Gordo, IA's chemicals reported rose from 22 in 2022 to 27 in 2023, based on EPA TRI filings.
- Cerro Gordo, IA's air releases fell from 166.7 thousand lb in 2022 to 144.9 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2023)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2023 | 58 (97%) | 2 | 0 | 56 |
| 2022 | 116 (99%) | 1 | 0 | 61 |
| 2021 | 118 (98%) | 2 | 0 | 56 |
| 2020 | 120 (98%) | 2 | 0 | 60 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Iowa, see the EPA's AirNow.gov.
Water Systems (6)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| MASON CITY WATER DEPARTMENT | 27,338 | 0 |
| CLEAR LAKE WATER DEPARTMENT | 7,687 | 0 |
| ROCKWELL WATER SUPPLY | 1,071 | 0 |
| VENTURA WATER WORKS | 716 | 0 |
| PLYMOUTH WATER SUPPLY | 378 | 0 |
| LONG BEACH MOBILE PARK | 50 | 0 |
TRI Facilities (13)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Ag Processing Inc | 360.2K lbs |
| 2 | Kraft Heinz Foods Co | 175.9K lbs |
| 3 | Curries Div of Aadg Inc. | 148.9K lbs |
| 4 | Woodharbor Doors & Cabinetry | 98.7K lbs |
| 5 | Golden Grain Energy LLC | 91.6K lbs |
| 6 | Heidelberg Materials US Cement LLC | 46.4K lbs |
| 7 | Reg Mason City LLC | 42.8K lbs |
| 8 | Minnesota Rubber & Plastics | 6.3K lbs |
| 9 | Masonite Corp - 19TH St Facility | 2.0K lbs |
| 10 | Masonite Corp - 12TH St Facility | 963 lbs |
| 11 | Midland Concrete Products | 0 lbs |
| 12 | Purina Animal Nutrition LLC - Mason City | 0 lbs |
| 13 | Stellar Industries Inc. - Mason City Plant | 0 lbs |
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Mason City Coal Gasification Plant | NPL Site | 69.33 |
| Northwestern States Portland Cement Co. | Deleted NPL Site | 57.80 |
Cities in Cerro Gordo (5)
Frequently Asked Questions
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.