Maricopa County contains 993 EPA-regulated facilities, 11 of which are currently flagged for significant noncompliance. The county also hosts 5 Superfund sites and 210 TRI chemical reporters. EPA has assessed $27.8M in lifetime penalties and TRI reporters disclosed roughly 546.0k lb of on-site releases. That facility count is well above the Arizona state average of 47 per county.
| Site | City | Status |
|---|---|---|
| Motorola Inc 52nd Street Plant | Phoenix | Cleanup underway |
| Indian Bend Wash Area | Scottsdale | Ready for anticipated reuse |
| Phoenix Goodyear Airport Area | Goodyear | Cleanup underway |
| Hassayampa Landfill | Arlington | Ready for anticipated reuse |
| Williams Air Force Base | Chandler | Cleanup underway |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Modern Industies, Inc | Phoenix | $0 | 2026-01-09 |
| Modern Industries | Phoenix | $0 | 2025-08-12 |
| Thatcher Company Of Arizona | Buckeye | $0 | 2025-03-28 |
| Carrillo Recycle | Phoenix | $0 | 2025-11-25 |
| Mesa Materials | Phoenix | $0 | 2026-03-06 |
| Stadium Chevron | $0 | ||
| Adaman Mutual Water Co | Litchfield Park | $0 | |
| Polyglass Usa, Inc. | Phoenix | $0 | 2025-05-08 |
| 59th Ave Warehouse | Phoenix | $0 | 2026-01-15 |
| Coolidge Pit | Unknown | $0 | |
| Pass Canyon | Prescott Valley | $0 | 2025-07-31 |