EPA-regulated facilities in Columbia County, WA

There are 70 EPA-regulated facilities inside Columbia County, Washington. The most common kinds are water discharge (32), hazardous waste (25), drinking water systems (11). 4 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 10 have a violation on record.

Open the map of Columbia County

70facilities in the county

4in significant noncompliance

10with a violation on record

$0in penalties, last 5 years

By category

Category	Facilities
Hazardous waste	25
Small quantity generators	4
Air emissions	4
Synthetic minor sources	1
Water discharge	32
Minor permits	29
Drinking water systems	11
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.

ROCK HILL CONCRETE CO LLC 110 CAMERON ST, DAYTON, WA, 99328 Significant noncompliance
KONEN ROCK CRUSHING INC 910 N TOUCHET RD, DAYTON, WA, 99328 Significant noncompliance
WA DOT SC REGION QS-CO-16 DAYTON MP 381.5 SR 12, DAYTON, WA, 99328 Significant noncompliance
LITTLE GOOSE LOCK AND DAM 1001 LITTLE GOOSE DAM ROAD, STARBUCK, WA, 99359 Significant noncompliance

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.