EPA-regulated facilities in Lyon County, IA

There are 141 EPA-regulated facilities inside Lyon County, Iowa. The most common kinds are water discharge (71), hazardous waste (27), chemical (rmp/tri) (23). 2 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 4 have a violation on record. Penalties over the last five years total $7k across 2 sites.

Open the map of Lyon County

141facilities in the county

2in significant noncompliance

4with a violation on record

$7kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	27
Large quantity generators	1
Small quantity generators	18
Chemical (RMP/TRI)	23
Air emissions	21
Major sources	2
Synthetic minor sources	8
Minor sources	9
Water discharge	71
Minor permits	38
Drinking water systems	13

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

DOON CITY OF STP CITY CLERK, CITY HALL, DOON, IA, 51235 Significant noncompliance · $2k in penalties
NOVARTIS ANIMAL HEALTH US INC 1447 140TH STREET, LARCHWOOD, IA, 51241 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

ROCK RIVER FEEDYARDS, INC. 1611 FIR AVENUE, ROCK RAPIDS, IA, 51246 $5k 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.