EPA-regulated facilities in Napa County, CA

There are 2,893 EPA-regulated facilities inside Napa County, California. The most common kinds are hazardous waste (2,060), water discharge (409), air emissions (395). 6 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 38 have a violation on record. Penalties over the last five years total $5.5M across 6 sites.

Open the map of Napa County

2,893facilities in the county

6in significant noncompliance

38with a violation on record

$5.5Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	2,060
Large quantity generators	39
Small quantity generators	196
Transporters	16
Chemical (RMP/TRI)	16
Superfund	5
Air emissions	395
Synthetic minor sources	3
Minor sources	5
Water discharge	409
Major permits	2
Minor permits	393
Drinking water systems	213
Greenhouse gas reporters	2
Data centers	3
Scrap yards	1
Recycling centers	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.

CITY OF ST. HELENA WASTEWATER & RECLAMATION PLANT #1 CHAIX LANE, SAINT HELENA, CA, 94574 Significant noncompliance · $147k in penalties
NAPA-VALLEJO WASTE MANAGEMENT AUTHORITY END EUCALYPTUS ROAD, NAPA, CA, 94558 Significant noncompliance · $31k in penalties
NAPA STATE HOSPITAL 2100 NAPA VALLEJO HWY, NAPA, CA, 94558 Significant noncompliance · $16k in penalties
V SATTUI WINERY 1111 WHITE LN, SAINT HELENA, CA, 94574 Significant noncompliance
CAPELL VALLEY ESTATES NAPA, CA, 94558 Significant noncompliance
DUNAWEAL WWTP 1185 DUNAWEAL LANE, CALISTOGA, CA, 94515 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UNITED PARCEL SERVICE- NAPA 2531 NAPA VALLEY CORPORATION D, NAPA, CA, 94558 $5.3M in penalties
RAMONDIN USA INC 541 TECHNOLOGY WAY, NAPA, CA, 94558 $15k in penalties
AMERICAN CANYON WASTE WATER TREATMENT FACILITY 151 MEZZETTA CT, AMERICAN CANYON, CA, 94503 $2k in penalties

Superfund sites

U.S. BUREAU OF RECLAMATION LAKE BERRYESSA 5520 KNOXVILLE RD, NAPA, CA, 94558
PACIFIC UNION COLLEGE 1 ANGWIN AVE, ANGWIN, CA, 94508
AETNA MINE AETNA SPRINGS ROAD, POPE VALLEY, CA, 94567
ASYLUM SLOUGH OIL SPILL NAPA RIVER,END OF KAISER WAY IN WATERWAY, NAPA, CA, 94558
CORONA/TWIN PEAKS MINES OAT HILL RD., KIT CARSON, CA, 94515

Data centers

REGULUS 860 LATOUR COURT, NAPA, CA, 94558
KAISER PERMANENTE 2600 NAPA VALLY CRPRT DR, NAPA, CA, 94558
Kaiser Data Center

Towns in Napa County

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.