EPA-regulated facilities in Colusa County, CA

There are 688 EPA-regulated facilities inside Colusa County, California. The most common kinds are hazardous waste (508), air emissions (134), water discharge (49). None is in significant noncompliance, but 5 have a violation on record. Penalties over the last five years total $22k across 2 sites.

Open the map of Colusa County

688facilities in the county

0in significant noncompliance

5with a violation on record

$22kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	508
Large quantity generators	7
Small quantity generators	42
Transporters	5
Chemical (RMP/TRI)	6
Superfund	1
Air emissions	134
Major sources	7
Minor sources	1
Water discharge	49
Minor permits	35
Drinking water systems	33
Greenhouse gas reporters	5
Scrap yards	1

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.

COLUSA WWTP 2820 WILL S. GREEN ROAD, COLUSA, CA, 95932 $16k in penalties
WILLIAMS WWTP 501 N COLUSA CUT OPF ROAD, WILLIAMS, CA, 95987 $6k in penalties

Superfund sites

WIDE AWAKE MINE COLUSA COUNTY APNS 018-200-010, -011,, WILBUR SPRINGS, CA, 95987

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.