EPA-regulated facilities near Discovery Bay, CA

There are 202 EPA-regulated facilities within 5 miles of Discovery Bay, California. The most common kinds are hazardous waste (155), air emissions (42), water discharge (13). None is in significant noncompliance, but 2 have a violation on record. Penalties over the last five years total $261k across 2 sites.

Open the map here

202facilities within 5 miles

0in significant noncompliance

2with a violation on record

$261kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	155
Large quantity generators	3
Small quantity generators	7
Transporters	11
Chemical (RMP/TRI)	1
Air emissions	42
Water discharge	13
Major permits	1
Minor permits	9
Drinking water systems	2

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.

DILLARD ENVIRONMENTAL SERVICES 3120 CAMINO DIABLO ROAD, BYRON, CA, 94514 · 3.6 mi $255k in penalties
DISCOVERY BAY WWTP HIGHWAY 4 AND CHANNEL ROAD, DISCOVERY BAY, CA, 94514 · 1.1 mi $6k in penalties

County

Contra Costa County

Nearby towns

Brentwood 7 mi
Oakley 8 mi
Mountain House 10 mi
Antioch 12 mi
Tracy 15 mi
Stockton 16 mi
Lathrop 17 mi
Livermore 18 mi

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. Distances are from the center of Discovery Bay as the Census Bureau records it. The Data page explains where each record comes from and how it can mislead.