Maricopa County, AZ
The federal environmental record for Maricopa County (population 4,585,871): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
7
Superfund NPL sites
35
federal cleanup sites
17
PFAS-detecting water systems
195
TRI facilities
133
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Hassayampa Landfill | Hassayampa | on the NPL | 07/22/1987 |
| Indian Bend Wash Area | Scottsdale | on the NPL | 09/08/1983 |
| Luke Air Force Base | Glendale | deleted | 08/30/1990 |
| Motorola, Inc. (52nd Street Plant) | Phoenix | on the NPL | 10/04/1989 |
| Nineteenth Avenue Landfill | Phoenix | deleted | 09/08/1983 |
| Phoenix-Goodyear Airport Area | Avondale, Goodyear | on the NPL | 09/08/1983 |
| Williams Air Force Base | Chandler | on the NPL | 11/21/1989 |
Drinking water: PFAS testing
Public water systems serving Maricopa with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| LIBERTY WATER LPSCO AZ0407046 | PFPeA: 54.6 ng/L PFHxA: 23.2 ng/L PFBA: 20.3 ng/L | above final limit |
| City of Avondale AZ0407088 | PFPeA: 17.2 ng/L PFBS: 15.6 ng/L PFOA: 13.5 ng/L | above final limit |
| GILBERT, TOWN OF AZ0407092 | PFBS: 18.1 ng/L PFOS: 9.8 ng/L PFOA: 6.5 ng/L | above final limit |
| GOODYEAR WATER DEPARTMENT AZ0407094 | PFBS: 13 ng/L PFOS: 7.9 ng/L PFHxS: 6.1 ng/L | above final limit |
| PEORIA CITY OF AZ0407096 | PFBS: 14.8 ng/L PFOA: 5.6 ng/L PFHxS: 3.7 ng/L | above final limit |
| TEMPE CITY OF AZ0407100 | PFHxS: 70.5 ng/L PFOS: 55.8 ng/L PFOA: 38.7 ng/L | above final limit |
| USAF LUKE AIR FORCE BASE AZ0407305 | PFPeA: 12.4 ng/L PFOS: 11.7 ng/L PFOA: 10 ng/L | above final limit |
| PHOENIX INTERNATIONAL RACEWAY AZ0407406 | PFOS: 10 ng/L | above final limit |
| PHOENIX CITY OF AZ0407025 | PFBS: 16 ng/L PFBA: 6 ng/L | detected |
| VALLEY UTILITIES WATER COMPANY GLENDALE AZ0407079 | PFPeA: 59 ng/L PFHxA: 52 ng/L PFBA: 16 ng/L | detected |
| CHANDLER CITY OF AZ0407090 | PFBS: 12 ng/L PFPeA: 5.3 ng/L PFBA: 5 ng/L | detected |
| EL MIRAGE CITY OF AZ0407091 | PFPeA: 10 ng/L PFBS: 9 ng/L PFHxA: 6 ng/L | detected |
| GLENDALE CITY OF AZ0407093 | PFBS: 11.7 ng/L | detected |
| MESA CITY OF AZ0407095 | PFBS: 15.2 ng/L PFHxS: 9.3 ng/L PFHxA: 3.2 ng/L | detected |
| SCOTTSDALE CITY OF AZ0407098 | PFBS: 3.2 ng/L | detected |
| TOLLESON CITY OF AZ0407101 | PFBS: 14.2 ng/L PFBA: 6.5 ng/L | detected |
| AZ Water Co. - White Tanks AZ0407128 | PFBA: 7 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
195 facilities in Maricopa filed TRI reports for 2024, totalling 1.7M lb released. The 25 largest by volume:
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| IMSAMET OF ARIZONA | GOODYEAR | Aluminum (fume or dust), Copper compounds | 492k lb |
| CMC REBAR ARIZONA | MESA | Zinc compounds, Lead And Lead Compounds | 97k lb |
| UNITED DAIRYMEN OF ARIZONA | TEMPE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 83k lb |
| CLEAN HARBORS ARIZONA | PHOENIX | Ethylene glycol, Polycyclic aromatic compounds | 79k lb |
| BALL METAL BEVERAGE CONTAINER CORP | WADDELL | Certain glycol ethers, n-Butyl alcohol | 76k lb |
| BALL METAL BEVERAGE CONTAINER CORP. (GOODYEAR FACILITY) | GOODYEAR | Certain glycol ethers, n-Butyl alcohol | 76k lb |
| TSMC ARIZONA CORPORATION | PHOENIX | Ammonia, Copper And Copper Compounds | 65k lb |
| HONEYWELL ENGINES SYSTEMS & SERVICES | PHOENIX | Ammonia, Chromium | 56k lb |
| SUMCO SOUTHWEST CORP | PHOENIX | Nitrate compounds (water dissociable; reportable only when in aqueous solution), N-Methyl-2-pyrrolidone | 54k lb |
| ISOLA USA CORP. | CHANDLER | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 53k lb |
| INTEL CORP-OCOTILLO CAMPUS | CHANDLER | Fluorine, Ammonia | 52k lb |
| RAUCH N.A. | WADDELL | Ammonia, Formic acid | 41k lb |
| MAAX SPAS INDUSTRIES CORP | CHANDLER | Styrene | 37k lb |
| FUJIFILM ELECTRONIC MATERIALS USA INC | MESA | Hydrogen fluoride, Ammonia | 36k lb |
| MARLAM INDUSTRIES INC. | PHOENIX | Styrene | 31k lb |
| PARKER HANNIFIN CORP | GLENDALE | Nickel And Nickel Compounds, 1-Bromopropane | 31k lb |
| NXP USA - CHANDLER | CHANDLER | Nitrate compounds (water dissociable; reportable only when in aqueous solution), N-Methyl-2-pyrrolidone | 30k lb |
| QUANTUMCLEAN | PHOENIX | Hydrogen fluoride, Nitric acid | 27k lb |
| INTEL-MAIN CHANDLER CAMPUS | CHANDLER | Certain glycol ethers, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 24k lb |
| LIGHTING RESOURCES LLC | PHOENIX | Mercury compounds | 23k lb |
| AMERICAN ITALIAN PASTA CO | TOLLESON | Sulfuryl fluoride | 18k lb |
| SHAMROCK FOODS CO | PHOENIX | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 17k lb |
| VEOLIA N.A. INC. | PHOENIX | Lead compounds, Mercury | 15k lb |
| JBS TOLLESON | TOLLESON | Ammonia | 15k lb |
| U.S. DOD USAF BARRY M. GOLDWATER RANGE | GILA BEND | Copper, Lead | 14k lb |
Underground fuel tanks
EPA's UST Finder records 4,903 tank facilities in Maricopa: 3,082 tanks in service and 11,572 closed. 4,557 fuel releases are on record, of which 133 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Maricopa as Zone 2, moderate predicted indoor radon (2 to 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Maricopa, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- AGUA FRIA HIGH SCHOOL MERCURYAVONDALE
- ARIZONA CASTINGS INCTEMPE
- ARIZONA PROJECTS OFFICEPHOENIX
- BEAN & COMPANYPALO VERDE
- DATELAND LDFLDATELAND
- DCE CIRCUITSTEMPE
- F&B MFG COPHOENIX
- FELTON KING PROPERTYPHOENIX
- HASSAYAMPA TRANSFER STATION WASTE TIRE COLLECTION SITEARLINGTON
- HILL BROTHERS CHEMICAL COPHOENIX
- HONEYWELL ENGINES SYSTEMSPHOENIX
- INDIAN BEND WASH AREASCOTTSDALE
- LANSDALE TRANSISTOR & ELECPHOENIX
- LAYKE INCPHOENIX
- LIBERTY SUBSTATIONBUCKEYE
- MAY INDUSTRIESPHOENIX
- MESA RICIN BEANSMESA
- NORTH 19TH AVENUE MERCURY SPILLPHOENIX
- ON SEMICONDUCTOR SCI LLCPHOENIX
- PHOENIX HYDROCARBONSPHOENIX
- PHOENIX SKY HARBOR INTL AIRPORTPHOENIX
- PHOENIX-GOODYEAR AIRPORT AREAGOODYEAR
- QUALITY PRINTED CIRCUITS CORPPHOENIX
- SMITH MILL SITEWICKENBURG
- SOLOMONS MINES INC (WRG)PHOENIX
- SOLVENT RECY-CLEANPHOENIX
- TEMPE LAKE UNION PACIFIC SPILLTEMPE
- THERM-O-ROCK WEST INCCHANDLER
- U.S. ARMY NATIONAL GUARD PAPAGO PARK RANGEPHOENIX
- UNIDYNAMICS/PHOENIX INC. - WHITE TANKSGOODYEAR
- USAF LUKE AIR FORCE BASEGLENDALE
- VAN WATER & ROGERSPHOENIX
- VIKING CLEANERS - FORMERPHOENIX
- VULTURE MILL SITEWICKENBURG
- WESTERN DYNEXPHOENIX