EPA-regulated facilities in Plymouth County, IA

There are 191 EPA-regulated facilities inside Plymouth County, Iowa. The most common kinds are hazardous waste (79), water discharge (72), air emissions (42). 2 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 8 have a violation on record. Penalties over the last five years total $236k across 1 site.

Open the map of Plymouth County

191facilities in the county

2in significant noncompliance

8with a violation on record

$236kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	79
Small quantity generators	40
Chemical (RMP/TRI)	13
Superfund	4
Air emissions	42
Major sources	2
Synthetic minor sources	13
Minor sources	20
Water discharge	72
Major permits	1
Minor permits	31
Drinking water systems	16
Greenhouse gas reporters	1

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.

SMITHCO MANUFACTURING INCORPORATED 30902 C38, LE MARS, IA, 51031 Significant noncompliance · $236k in penalties
PLYMOUTH ENERGY LLC 22234 K42, MERRILL, IA, 51038 Significant noncompliance

Superfund sites

HIGHWAY 3 PCE INTERSECTION OF HIGHWAY 3 AND, LE MARS, IA, 51031
LE MARS COAL GAS PLANT 331 1ST ST NE, LE MARS, IA, 51031
WESTERN AREA POWER ADMIN-HINTON SUBSTN HIGHWAY 75, HINTON, IA, 51024
RECYCLETRONICS-AKRON FARM FACILITY 16998 FARM FACILITY, AKRON, IA, 51001

Towns in Plymouth County

Le Mars

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.