Linn, 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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Linn in Iowa · Population: 229,463
TRI sites such as Adm Corn Processing; Pmx Industries Inc; Cargill Inc.; SDWIS systems such as CEDAR RAPIDS WATER DEPARTMENT; MARION MUNICIPAL WATER DEPT; HIAWATHA WATER DEPT; NPL sites such as Electro-Coatings, Inc. anchor Linn, IA's EPA extract. Derived burden score 58/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Linn include MARION MUNICIPAL WATER DEPT; OAK RIDGE LAKE ESTATES, while Adm Corn Processing leads reported TRI pounds among local Form R filers. AQS median AQI 44 / peak 79 in 2024.
Burden score 58/100 (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 Linn -- 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 Linn, IA: EPA TRI 2023 reporting year
Same facilities, both years
+1.7%
21 facilities that filed in 2022 and 2023
Whole inventory
+1.7%
2.6 million lb → 2.6 million lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Linn, IA's total reported releases rose from 2.6 million lb in 2022 to 2.6 million lb in 2023, based on EPA TRI filings.
- Linn, IA's land releases rose from 2.2 thousand lb in 2022 to 4.1 thousand lb in 2023, based on EPA TRI filings.
- Linn, IA's water releases fell from 2.0 thousand lb in 2022 to 763 lb in 2023, based on EPA TRI filings.
- Linn, IA's off-site transfers rose from 1.2 million lb in 2022 to 1.4 million lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
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 |
|---|---|---|---|---|
| 2024 | 235 (64%) | 131 | 0 | 79 |
| 2023 | 130 (36%) | 217 | 14 | 207 |
| 2022 | 197 (54%) | 168 | 0 | 81 |
| 2021 | 160 (44%) | 201 | 4 | 123 |
| 2020 | 207 (57%) | 158 | 1 | 105 |
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 (26)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CEDAR RAPIDS WATER DEPARTMENT | 142,364 | 0 |
| MARION MUNICIPAL WATER DEPT | 41,623 | 1 |
| HIAWATHA WATER DEPT | 7,183 | 0 |
| MOUNT VERNON WATER SUPPLY | 4,527 | 0 |
| FAIRFAX WATER SUPPLY | 2,828 | 0 |
| CENTER POINT WATER SUPPLY | 2,579 | 0 |
| ELY WATER SUPPLY | 2,328 | 0 |
| PALO WATER SUPPLY | 1,407 | 0 |
| CENTRAL CITY WATER SUPPLY | 1,264 | 0 |
| SPRINGVILLE WATER SUPPLY | 1,164 | 0 |
| EAGLE RIDGE | 1,005 | 0 |
| COGGON WATER DEPARTMENT | 701 | 0 |
| WALKER WATER WORKS | 688 | 0 |
| ALBURNETT WATER SUPPLY | 675 | 0 |
| MARTELLE WATER WORKS | 249 | 0 |
| GLENBROOK COVE AREA | 233 | 0 |
| PRAIRIEBURG MUNI. WATER SUPPLY | 160 | 0 |
| ANCHORS POINT COA | 150 | 0 |
| DEER RIDGE HOMEOWNERS WATER ASSC. | 94 | 0 |
| OAK RIDGE LAKE ESTATES | 88 | 3 |
| CARLTON MOBILE HOME COURT | 85 | 0 |
| WEST POST ESTATES ADDITION | 85 | 0 |
| BRITTANY ESTATES HOMEOWNERS ASSOCIATION | 72 | 0 |
| MIDWAY WATER AND LIGHTING | 72 | 0 |
| GREEN LAKE MHP | 70 | 0 |
| TERRY WATER ASSOCIATION | 25 | 0 |
TRI Facilities (29)
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Electro-Coatings, Inc. | Deleted NPL Site | 42.24 |
Cities in Linn (14)
Frequently Asked Questions
What is the environmental risk level in Linn, Iowa? ▼
Are there Superfund sites in Linn? ▼
How many toxic release facilities are in Linn? ▼
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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.