Washtenaw County, MI
The federal environmental record for Washtenaw County (population 365,536): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
17
federal cleanup sites
3
PFAS-detecting water systems
15
TRI facilities
169
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Gelman Sciences Inc. | Ann Arbor | on the NPL | 03/13/2026 |
Drinking water: PFAS testing
Public water systems serving Washtenaw 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 |
|---|---|---|
| ANN ARBOR MI0000220 | PFBA: 6.1 ng/L PFPeA: 4.7 ng/L PFHxA: 3.5 ng/L | detected |
| SCIO TOWNSHIP MI0005977 | PFPeA: 4.9 ng/L PFHpA: 4.2 ng/L PFHxA: 3.6 ng/L | detected |
| SUPERIOR TOWNSHIP MI0006490 | PFPeA: 3 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
15 facilities in Washtenaw filed TRI reports for 2024, totalling 42k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| DAPCO INDUSTRIES | DEXTER | Ammonia, Dichloromethane | 19k lb |
| MARSH PLATING CORP | YPSILANTI | Zinc compounds | 16k lb |
| ABRASIVE FINISHING INC | CHELSEA | Manganese compounds | 3k lb |
| MARSH PLATING - WILLOW RUN | YPSILANTI | Zinc compounds | 3k lb |
| CAYMAN CHEMICAL CO INC. | ANN ARBOR | Dichloromethane | 255 lb |
| U.S. EPA NATIONAL VEHICLE & FUEL EMISSIONS LABORATORY | ANN ARBOR | Toluene, Xylene (mixed isomers) | 199 lb |
| FAURECIA INTERIOR SYSTEMS SALINE LLC | SALINE | Zinc compounds | 16 lb |
| ELECTRONICS FOR IMAGING INC | YPSILANTI | Certain glycol ethers | 1 lb |
| CADILLAC ASPHALT LLC - ANN ARBOR | ANN ARBOR | Polycyclic aromatic compounds, Benzo[g,h,i]perylene | 1 lb |
| CONDAT CORP | SALINE | - | 0 lb |
| DEXTER FASTENER TECHNOLOGIES INC | DEXTER | - | 0 lb |
| ALCO MANUFACTURING CORP LLC | DEXTER | Manganese | 0 lb |
| SALINE LECTRONICS INC | SALINE | - | 0 lb |
| ALPHA METAL FINISHING CO. | DEXTER | - | 0 lb |
| AMERICAN SOY PRODUCTS INC. | SALINE | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 707 tank facilities in Washtenaw: 563 tanks in service and 2,044 closed. 717 fuel releases are on record, of which 169 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Washtenaw as Zone 1, the highest predicted indoor radon levels (over 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 Washtenaw, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- AMERICAN SYNTHETICS SITEYPSILANTI
- ARMEN CLEANERSANN ARBOR
- CANTERBURY MERCURY SPILLANN ARBOR
- COLLINGHAM ASBESTOS DUMPDETROIT
- DAYTONA AVENUE JUNK YARD
- DELHI MERCURY SPILLANN ARBOR
- FORD LAKEYPSILANTI
- FORD MOTOR CO. (SLUDGE LAGOON)YPSILANTI
- GELMAN SCIENCES INC.ANN ARBOR
- JACKSON YPSILANTI CLEANERS SITEYPSILANTI
- M14 ROLLOVERANN ARBOR
- SCIO TOWNSHIP HERBICIDE SPILLSCIO
- ST. JOSEPH HOSPITAL PHOSPHINE RELEASEYPSILANTI
- TEXTILE ROAD SITEYPSILANTI
- US 23 DOW TRUCK ROLLOVERANN ARBOR
- US EPA NATL VEHICLE&FUEL EMISSIONANN ARBOR
- WILLOW RUN CREEKYPSILANTI