EPA-regulated facilities near Ontario, CA

There are 6,355 EPA-regulated facilities within 5 miles of Ontario, California. The most common kinds are hazardous waste (5,218), water discharge (1,249), air emissions (352). 4 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 12 have a violation on record. Penalties over the last five years total $21M across 11 sites.

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6,355facilities within 5 miles

4in significant noncompliance

12with a violation on record

$21Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	5,218
Large quantity generators	133
Small quantity generators	635
Transporters	61
Chemical (RMP/TRI)	154
Superfund	13
Air emissions	352
Major sources	25
Minor sources	23
Water discharge	1,249
Major permits	1
Minor permits	1,096
Drinking water systems	10
Greenhouse gas reporters	4

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.

3M ONTARIO 5151 E PHILADELPHIA ST, ONTARIO, CA, 91761 · 4.1 mi Significant noncompliance · $2k in penalties
B A E SYSTEMS 1930 SOUTH VINEYARD AVENUE, ONTARIO, CA, 91761 · 0.4 mi Significant noncompliance
7 DAZE LLC 1425 S VINEYARD AVE, ONTARIO, CA, 91761 · 0.8 mi Significant noncompliance
ICL PRODUCTS (FORMERLY MONSANTO) 810 EAST MAIN & SOUTH CAMPUS, ONTARIO, CA, 91761 · 2.6 mi Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UNITED PARCEL SERVICE 3140 E JURUPA AVE, ONTARIO, CA, 91761 · 1.5 mi $5.3M in penalties
UPS ONTARIO CARRIER SUPPORT 3121 E. JURUPA, ONTARIO, CA, 91761 · 1.4 mi $5.3M in penalties
UPS ONTARIO FREIGHT HUB 3110 JURUPA ST, ONTARIO, CA, 91761 · 1.4 mi $5.3M in penalties
UPS WESTERN REGIONAL INTERNATIONAL AIR HUB 2925 E JURUPA ST, ONTARIO, CA, 91761 · 1.2 mi $5.3M in penalties
TST INC 11601 ETIWANDA AVE, FONTANA, CA, 92337 · 4.8 mi $75k in penalties

Superfund sites

VINEYARD MERCURY SPILL 2570 SOUTH VINEYARD AVE, ONTARIO, CA, 91761-6481 · 0.8 mi
BILL AND WAGS 1516 SOUTH BON VIEW, ONTARIO, CA, 91761 · 1.9 mi
MILLIKEN SANITARY LANDFILL MILLIKEN AVE & HWY 60, ONTARIO, CA, 91761 · 2.2 mi
CERTIFIED TOWING INC 1135 E STATE ST, ONTARIO, CA, 91761 · 2.2 mi
ONTARIO ABANDONED HAND SANITIZER SITE 13990 S. ARCHIBALD AVENUE, ONTARIO, CA, 91761 · 2.7 mi
FRANCIS ST. FIREWORKS 428 WEST FRANCIS ST., ONTARIO, CA, 91762 · 2.8 mi
PONZI SCHEME PAINTS 1 4290 BRICKELL, ONTARIO, CA, 91761 · 3.0 mi
PONZI SCHEME PAINTS 2 2830 OLD GUASTI ROAD, ONTARIO, CA, 91761 · 3.2 mi
US COLLOIDAL TECHNOLOGIES INC 9330 7TH STREET, RANCHO CUCAMONGA, CA, 91730 · 3.5 mi
ALTAWOOD INC. WASTE SITE 420 SOUTH 11TH AVENUE, UPLAND, CA, 91786 · 3.9 mi

County

San Bernardino County

Nearby towns

Chino 5 mi
Eastvale 5 mi
Montclair 6 mi
Upland 6 mi
Rancho Cucamonga 7 mi
Jurupa Valley 8 mi
Norco 8 mi
Claremont 9 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 Ontario as the Census Bureau records it. The Data page explains where each record comes from and how it can mislead.