wimby What's in my backyard?

EPA-regulated facilities in Pima County, AZ

There are 2,989 EPA-regulated facilities inside Pima County, Arizona. The most common kinds are hazardous waste (1,707), water discharge (954), drinking water systems (269). 7 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 73 have a violation on record. Penalties over the last five years total $11M across 3 sites.

Open the map of Pima County

2,989facilities in the county
7in significant noncompliance
73with a violation on record
$11Min penalties, last 5 years

By category

CategoryFacilities
Hazardous waste1,707
Large quantity generators23
Small quantity generators500
Transporters3
Chemical (RMP/TRI)132
Superfund22
Air emissions158
Major sources17
Synthetic minor sources6
Minor sources12
Water discharge954
Major permits13
Minor permits769
Drinking water systems269
Greenhouse gas reporters11
Data centers3
Scrap yards29
Recycling centers2

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.

Largest penalties

Penalties assessed over the last five years.

Superfund sites

Data centers

Towns in Pima 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.