EPA-regulated facilities in Humboldt County, CA

There are 2,230 EPA-regulated facilities inside Humboldt County, California. The most common kinds are hazardous waste (1,573), air emissions (341), water discharge (277). 6 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 34 have a violation on record. Penalties over the last five years total $5.5M across 8 sites.

Open the map of Humboldt County

2,230facilities in the county

6in significant noncompliance

34with a violation on record

$5.5Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	1,573
Large quantity generators	41
Small quantity generators	189
Transporters	15
Chemical (RMP/TRI)	18
Superfund	11
Air emissions	341
Major sources	7
Synthetic minor sources	3
Minor sources	3
Water discharge	277
Major permits	6
Minor permits	198
Drinking water systems	115
Greenhouse gas reporters	2
Data centers	1
Scrap yards	2
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 ARCATA WASTEWATER TREATMENT FACILITY 600 SOUTH G ST, ARCATA, CA, 95521 Significant noncompliance · $48k in penalties
RIO DELL POTW 475 HILLTOP AVENUE, RIO DELL, CA, 95562 Significant noncompliance · $21k in penalties
CITY OF FORTUNA - MUNICIPAL WASTEWATER PLANT 180 DINSMORE DR, FORTUNA, CA, 95540 Significant noncompliance · $15k in penalties
LOLETA WWTF 298 EEL RIVER DRIVE, LOLETA, CA, 95551 Significant noncompliance
HUMBOLDT REDWOOD COMPANY LLC 169 MAIN STREET, SCOTIA, CA, 95565 Significant noncompliance
CAL FIRE-HIGH ROCK CONSERVATION CAMP-WELL 01 - TREATED PO BOX 528, REDWAY, CA, 95560 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UPS EUREKA CAEUR 712 W CLARK, EUREKA, CA, 95501 $5.3M in penalties
EUREKA WASTEWATER TREATMENT PLANT 4301 HILFIKER LANE, EUREKA, CA, 95503 $93k in penalties
CALIFORNIA REDWOOD CO KORBEL SAWMILL 1165 MAPLE CREEK ROAD, KORBEL, CA, 95550 $21k in penalties
COLLEGE OF THE REDWOODS 7351 TOMPKINS HILL RD, EUREKA, CA, 95501 $6k in penalties
MONITORING STATION 570 EWING, TRINIDAD, CA, 95570 $3k in penalties

Superfund sites

CUMMINGS ROAD SANITARY LANDFILL CUMMINGS ROAD, EUREKA, CA, 95501
SIMPSON PLYWOOD MILL (OLD) 1200 DEL NORTE ST., EUREKA, CA, 95501
G & R METALS 132 W. FIRT STREET, EUREKA, CA, 95501
INDIAN ISLAND 0.5 MILES NW OF EUREKA, EUREKA, CA, 95502
SOUTHERN PACIFIC COMPANY FOURTH & BROADWAY, EUREKA, CA, 95501
SAMOA PULP MILL 1 TCF DRIVE NORTH SPIT OF HUMBOLDT BAY, SAMOA, CA, 95564
NAVAL FACILITY CENTERVILLE BEACH CENTERVILLE ROAD, FERNDALE, CA, 95536
SUPPLY CREEK ASBESTOS SITE NONE, HOOPA VALLEY RESERVATION, CA, 95546
CELTOR CHEMICAL WORKS BETW NORTON FLD & TRINITY RIV, HOOPA, CA, 95546
COPPER BLUFF MINE OFF HIGHWAY 96, APPROXIMATELY 0.9 MILE, HOOPA, CA, 95546

Data centers

EDGECONNEX - ARCATA 1296 11TH STREET, ARCATA, CA, 95521

Towns in Humboldt 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.