EPA-regulated facilities in Humboldt County, IA
There are 122 EPA-regulated facilities inside Humboldt County, Iowa. The most common kinds are hazardous waste (50), water discharge (38), air emissions (32). None is in significant noncompliance, but 3 have a violation on record. Penalties over the last five years total $8k across 1 site.
Open the map of Humboldt County
By category
| Category | Facilities |
|---|---|
| Hazardous waste | 50 |
| Treatment, storage or disposal | 1 |
| Small quantity generators | 22 |
| Chemical (RMP/TRI) | 9 |
| Air emissions | 32 |
| Major sources | 2 |
| Synthetic minor sources | 12 |
| Minor sources | 13 |
| Water discharge | 38 |
| Major permits | 1 |
| Minor permits | 12 |
| Drinking water systems | 15 |
A facility enrolled in several programs counts once in the total and once in each of its categories.
Largest penalties
Penalties assessed over the last five years.
- HUMBOLDT ASPHALT PLANT $8k in penalties
Bordering counties
Reading these numbers
These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.