EPA-regulated facilities in Stephens County, OK

There are 652 EPA-regulated facilities inside Stephens County, Oklahoma. The most common kinds are air emissions (461), hazardous waste (98), water discharge (64). 1 is currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 5 have a violation on record. Penalties over the last five years total $59k across 6 sites.

Open the map of Stephens County

652facilities in the county

1in significant noncompliance

5with a violation on record

$59kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	98
Large quantity generators	3
Small quantity generators	32
Transporters	1
Chemical (RMP/TRI)	27
Superfund	2
Air emissions	461
Major sources	4
Synthetic minor sources	129
Minor sources	267
Water discharge	64
Major permits	1
Minor permits	15
Drinking water systems	26
Greenhouse gas reporters	8

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.

DUNCAN PUBLIC UTILITIES AUTH 909 WEST FULLER RD, DUNCAN, OK, 73533 Significant noncompliance · $20k in penalties

Largest penalties

Penalties assessed over the last five years.

CESI CHEMICAL 1004 S. PLAINSMAN ROAD, MARLOW, OK, 73055 $28k in penalties
DCP OPERATING CO LP / SKIPPER COMPRESSOR STATION 0.92 MI NNW HWY 29/N3010 RD, FOSTER, OK, 73039 $6k in penalties
DCP OPERATING CO LP / CROSSROADS COMPRESSOR STATION 0.35 MI N OF HWY76 AND HWY29, MARLOW, OK, 73055 $2k in penalties
FW MIDCON I LLC / BAXENDALE CTB 1.15 MI NE OF N3040/OK29, BRAY, OK, 73533 $1k in penalties
FW MIDCON I LLC / HUNTER CTB 0.9 SW OF OK29/N3950 RD, BRAY, OK, 73533 $1k in penalties

Superfund sites

TOSCO CORP DUNCAN REFINERY 4 MI S ON OLD US 81, DUNCAN, OK, 73533
SANNER PIPE AND SALVAGE LLC TEXACO ROAD, OUTSIDE CITY LIMITS OF VELMA, VELMA, OK, 73533

Towns in Stephens County

Duncan

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.