Washtenaw, MI
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Washtenaw in Michigan · Population: 368,394
TRI sites such as Dapco Industries; Marsh Plating Corp; Marsh Plating - Willow Run; SDWIS systems such as ANN ARBOR; YPSILANTI COMMUNITY UTILITY AUTHORITY; PITTSFIELD TOWNSHIP; NPL sites such as Gelman Sciences Inc. anchor Washtenaw, MI's EPA extract. Derived burden score 48/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Washtenaw include SUPERIOR TOWNSHIP; SALINE VALLEY FARMS; WESTBROOK APARTMENTS, while Dapco Industries leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 87 in 2024.
Burden score 48/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Washtenaw -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Washtenaw, MI: EPA TRI 2023 reporting year
Same facilities, both years
+59.7%
17 facilities that filed in 2022 and 2023
Whole inventory
+59.7%
51.0 thousand lb → 81.4 thousand lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Washtenaw, MI's total reported releases rose from 51.0 thousand lb in 2022 to 81.4 thousand lb in 2023, based on EPA TRI filings.
- Washtenaw, MI's land releases rose from 0 lb in 2022 to 100 lb in 2023, based on EPA TRI filings.
- Washtenaw, MI's air releases rose from 30.1 thousand lb in 2022 to 54.7 thousand lb in 2023, based on EPA TRI filings.
- Washtenaw, MI's off-site transfers rose from 20.8 thousand lb in 2022 to 26.6 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 253 (69%) | 113 | 0 | 87 |
| 2023 | 168 (46%) | 184 | 9 | 218 |
| 2022 | 222 (61%) | 142 | 1 | 101 |
| 2021 | 212 (58%) | 153 | 0 | 100 |
| 2020 | 236 (64%) | 124 | 5 | 160 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Michigan, see the EPA's AirNow.gov.
Water Systems (28)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| ANN ARBOR | 123,851 | 0 |
| YPSILANTI COMMUNITY UTILITY AUTHORITY | 53,988 | 0 |
| PITTSFIELD TOWNSHIP | 24,500 | 0 |
| SALINE | 9,158 | 0 |
| SCIO TOWNSHIP | 8,500 | 0 |
| SUPERIOR TOWNSHIP | 6,830 | 4 |
| CHELSEA | 5,474 | 0 |
| DEXTER | 4,500 | 0 |
| AUGUSTA TOWNSHIP | 3,907 | 0 |
| MANCHESTER | 2,150 | 0 |
| LOCH ALPINE SANITARY AUTHORITY | 1,506 | 0 |
| ANN ARBOR TOWNSHIP | 1,338 | 0 |
| WOODLAND CENTER CORRECTIONAL FACILITY | 607 | 0 |
| BARTON HILLS | 450 | 0 |
| SALINE VALLEY FARMS | 375 | 2 |
| WESTBROOK APARTMENTS | 330 | 1 |
| PINE HAVEN MOBILE COURT | 300 | 0 |
| HARBOR COVE APARTMENTS | 288 | 0 |
| WHITMORE LAKE APARTMENTS | 281 | 0 |
| SYLVAN TOWNSHIP | 263 | 0 |
| MYSTIC RIDGE L.L.C. | 225 | 0 |
| REGENCY AT WHITMORE LAKE | 190 | 1 |
| COPPER MEADOWS | 128 | 0 |
| SISTERS OF MARY, MOTHER OF EUCHARIST | 100 | 0 |
| CREEKSIDE PARK | 94 | 0 |
| HARTWICK PINES ESTATES | 75 | 0 |
| PLEASANT LAKE PARK LLC | 60 | 0 |
| ST. LOUIS CENTER | 56 | 14 |
TRI Facilities (21)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Dapco Industries | 118.6K lbs |
| 2 | Marsh Plating Corp | 66.8K lbs |
| 3 | Marsh Plating - Willow Run | 65.1K lbs |
| 4 | U.S. EPA National Vehicle & Fuel Emissions Laboratory | 51.1K lbs |
| 5 | Faurecia Interior Systems Saline LLC | 19.1K lbs |
| 6 | Cayman Chemical Co Inc. | 19.0K lbs |
| 7 | Abrasive Finishing Inc | 12.3K lbs |
| 8 | Lgc Genomics LLC | 2.8K lbs |
| 9 | Thetford Corp | 1.1K lbs |
| 10 | Alpha Metal Finishing Co. | 350 lbs |
| 11 | Paladin Attachments LLC | 261 lbs |
| 12 | Ford Motor Co Rawsonville Plant | 219 lbs |
| 13 | Electronics for Imaging Inc | 5 lbs |
| 14 | Alco Manufacturing Corp LLC | 4 lbs |
| 15 | Cadillac Asphalt LLC - Ann Arbor | 3 lbs |
| 16 | Superior Materials 38 | 0 lbs |
| 17 | Extang Corp | 0 lbs |
| 18 | Dexter Fastener Technologies Inc | 0 lbs |
| 19 | Condat Corp | 0 lbs |
| 20 | Saline Lectronics Inc | 0 lbs |
| 21 | Jac Products Inc | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Gelman Sciences Inc. | NPL Site | 50.00 |
Cities in Washtenaw (8)
Frequently Asked Questions
What is the environmental risk level in Washtenaw, Michigan? ▼
Are there Superfund sites in Washtenaw? ▼
How many toxic release facilities are in Washtenaw? ▼
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Is the drinking water safe in Washtenaw? ▼
What environmental agencies cover Washtenaw? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.