EPA-regulated facilities in Rock County, WI

There are 1,229 EPA-regulated facilities inside Rock County, Wisconsin. The most common kinds are hazardous waste (650), water discharge (309), drinking water systems (248). 5 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 28 have a violation on record. Penalties over the last five years total $383k across 3 sites.

Open the map of Rock County

1,229facilities in the county

5in significant noncompliance

28with a violation on record

$383kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	650
Large quantity generators	7
Small quantity generators	265
Transporters	3
Chemical (RMP/TRI)	80
Superfund	6
Air emissions	106
Major sources	7
Synthetic minor sources	9
Minor sources	8
Water discharge	309
Major permits	3
Minor permits	219
Drinking water systems	248
Greenhouse gas reporters	6
Scrap yards	4
Recycling centers	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.

IKI MFG CO INC 107 MAPLE CT, EDGERTON, WI, 53534 Significant noncompliance · $2k in penalties
WPL - RIVERSIDE ENERGY CENTER 1401W B-R TOWNLINE RD, BELOIT, WI, 53511 Significant noncompliance
MIDWEST BIOFUEL, LLC 125 INDUSTRIAL DRIVE, CLINTON, WI, 53525 Significant noncompliance
EVANSVILLE WASTEWATER TREATMENT FACILITY 595 WATER ST, EVANSVILLE, WI, 53536 Significant noncompliance
EMBARRASS WASTEWATER TREATMENT ROUTE 2, EVANSVILLE, WI, 53536 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

RATHGIBSON JANESVILLE LLC 2505 FOSTER AVE, JANESVILLE, WI, 53545 $301k in penalties
EVONIK INDUSTRIES 900 S PALM ST, JANESVILLE, WI, 53548 $80k in penalties

Superfund sites

JANESVILLE ASH BEDS BLACKRIDGE RD, JANESVILLE, WI, 53545
JANESVILLE OLD LANDFILL BLACK BRIDGE ROAD, JANESVILLE, WI, 53545
RIVERSIDE PLATING CO INC 1623 BELOIT AVE, JANESVILLE, WI, 53546
WHEELER PIT CO TRK O & CO TRK J, JANESVILLE, WI, 53545
S RIVERSIDE DR AND HENDERSON AVE GW PLUME S RIVERSIDE DR AND HENDERSON AVE, BELOIT, WI, 53511
EDGERTON SAND & GRAVEL 421 HIGHWAY ST, EDGERTON, WI, 53534

Towns in Rock County

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.