EPA-regulated facilities in Okanogan County, WA

There are 556 EPA-regulated facilities inside Okanogan County, Washington. The most common kinds are water discharge (260), hazardous waste (141), drinking water systems (128). 31 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 77 have a violation on record. Penalties over the last five years total $5.4M across 2 sites.

Open the map of Okanogan County

556facilities in the county

31in significant noncompliance

77with a violation on record

$5.4Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	141
Treatment, storage or disposal	1
Small quantity generators	10
Chemical (RMP/TRI)	5
Superfund	16
Air emissions	48
Major sources	2
Synthetic minor sources	3
Minor sources	19
Water discharge	260
Minor permits	134
Drinking water systems	128
Scrap yards	1
Recycling centers	2

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.

PACIFIC CALCIUM JOHNSON CREEK RD AND RIVERSIDE CUTOFF RD, RIVERSIDE, WA, 98849 Significant noncompliance
RIVERSIDE WATER SYSTEM N MAIN ST, RIVERSIDE, WA, 98849 Significant noncompliance
TOLLEFSON CONSTRUCTION INC AIRPORT 4 SAND DUST LN, OMAK, WA, 98841 Significant noncompliance
OMAK SEWER SYSTEM IMPROVEMENTS THROUGHOUT THE CITY OF OMAK, OMAK, WA, 98841 Significant noncompliance
GRANITE NORTHWEST ENGH RD PIT 29716 US HWY 97, OMAK, WA, 98841 Significant noncompliance
COLUMBIA RIVER CARBONATE JANIS RAIL 18 MCGLOUGHLIN CANYON RD, TONASKET, WA, 98855 Significant noncompliance
OKANOGAN VALLEY CONCRETE INC 2145 ELMWAY, OKANOGAN, WA, 98840 Significant noncompliance
RIVER ROAD MOBILE HOME PARK WATER SYSTEM HIGHWAY 7, TONASKET, WA, 98855 Significant noncompliance
WHITCOMB AVENUE UNSPECIFIED, TONASKET, WA, 98855 Significant noncompliance
SMITH & NELSON INC 302 S WESTERN AVE, TONASKET, WA, 98855 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UPS OMAK 311 COLUMBIA, OMAK, WA, 98841 $5.3M in penalties
COULEE DAM WWTP 101 BEAVER DR, COULEE DAM, WA, 99116 $71k in penalties

Superfund sites

USDA FS OKANOGAN NF:KERR T35 R24E S23 WM SALMON CRK, CONCONULLY, WA, 98819
SILVER MOUNTAIN MINE T38N R26E WM S34 SILVER MOUNTAIN, LOOMIS, WA, 98827
USDA FS OKANOGAN NF:TONASKET T37N R27E S16 WM OKANOGAN RIV VLY, TONASKET, WA, 98855
FS-OKANOGAN-WENATCHEE NF, NORTH CASCADES SMOKE JUMPER BASE 23 INTERCITY AIRPORT RD, WINTHROP, WA, 98862
USDA FS OKANOGAN-WENATCHEE NF: LOWER WINTHROP COMPOUND 19284 HWY 20, 300 FT W OF DOWNTOWN CY, WINTHROP, WA, 98862
ALDER MILL T33N R22E S17,18, TWISP, WA, 98856
ALDER MINE 3 MI SE OF TWISP ON ALDER CREEK, TWISP, WA, 98856
USDA FS OKANOGAN NF:ALDER CRK T33N R21E S24 WM NE1/4 SW1/4, TWISP, WA, 98856
USDA FS OKANOGAN NF:MINNIE MINE T32N R22E S23 WM 8MI S OF TWISP, TWISP, WA, 98856
USDA USFS R06 EIGHT MILE RANCH OKANOGAN NATIONAL FOREST T36N R21E S 23 QSSE, WINTHROP, WA, 98862

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.