Ozaukee, WI
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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Ozaukee in Wisconsin · Population: 92,345
TRI sites such as Charter Steel-Saukville; Cedar Valley Cheese; Kemps LLC; SDWIS systems such as PORT WASHINGTON WATERWORKS; CEDARBURG L & W COMMISSION; GRAFTON WATERWORKS; NPL sites such as Amcast Industrial Corporation anchor Ozaukee, WI's EPA extract. Derived burden score 59/100 (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 Ozaukee include BELGIUM WATERWORKS; MEQUON TRAIL TOWNHOMES; VINTAGE ESTATES, while Charter Steel-Saukville leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 161 in 2024.
Burden score 59/100 (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 Ozaukee -- 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 Ozaukee, WI: EPA TRI 2023 reporting year
Same facilities, both years
+9.5%
16 facilities that filed in 2022 and 2023
Whole inventory
+9.5%
750.6 thousand lb → 822.0 thousand lb, every facility that filed
- Ozaukee, WI's total reported releases rose from 750.6 thousand lb in 2022 to 822.0 thousand lb in 2023, based on EPA TRI filings.
- Ozaukee, WI's water releases rose from 52 lb in 2022 to 175 lb in 2023, based on EPA TRI filings.
- Ozaukee, WI's off-site transfers rose from 667.9 thousand lb in 2022 to 744.0 thousand lb in 2023, based on EPA TRI filings.
- Ozaukee, WI's land releases fell from 51.6 thousand lb in 2022 to 47.8 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 | 296 (81%) | 61 | 7 | 161 |
| 2023 | 219 (60%) | 126 | 14 | 210 |
| 2022 | 228 (74%) | 74 | 4 | 159 |
| 2021 | 241 (66%) | 116 | 7 | 129 |
| 2020 | 269 (74%) | 91 | 4 | 164 |
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 Wisconsin, see the EPA's AirNow.gov.
Water Systems (40)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| PORT WASHINGTON WATERWORKS | 12,853 | 0 |
| CEDARBURG L & W COMMISSION | 12,500 | 0 |
| GRAFTON WATERWORKS | 12,269 | 0 |
| MEQUON WATER UTILITY | 11,152 | 0 |
| SAUKVILLE WATERWORKS | 4,268 | 0 |
| BELGIUM WATERWORKS | 2,493 | 1 |
| FREDONIA WATERWORKS | 2,279 | 0 |
| CONCORDIA UNIVERSITY | 1,500 | 0 |
| MEQUON TRAIL TOWNHOMES | 615 | 1 |
| HUNTINGTON PARK | 600 | 0 |
| WESTCHESTER LAKES SUBDIVISION | 300 | 0 |
| PARK PLACE SUBDIVISION | 260 | 0 |
| BRIGHTON RIDGE SUBDIVISION | 200 | 0 |
| HADDONSTONE SUBDIVISION | 195 | 0 |
| COUNTRY TERRACE CONDO HOMES | 160 | 0 |
| CENTURY ESTATES 1 | 130 | 0 |
| VILLAGE HEIGHTS | 130 | 0 |
| VINTAGE ESTATES | 130 | 1 |
| KENILWORTH SUBD | 120 | 0 |
| MEQUON ON THE SQUARE CONDOMINIUM OWNERS ASSOCIATION INC | 110 | 0 |
| RAVINE FARMS HM OWNERS ASSOC | 100 | 0 |
| RIVER LAKE SUBDIVISION | 100 | 0 |
| WYNGATE SUBDIVISION | 100 | 0 |
| WOODRIDGE ESTATES | 100 | 0 |
| LINDEN LANE APTS 117 | 90 | 0 |
| HIGHLAND COLONY ESTATES CONDO | 88 | 0 |
| RIVER TRAILS ESTATES WATER USERS | 84 | 1 |
| LAKE COUNTRY APARTMENTS | 84 | 0 |
| WILLOW GLEN APARTMENTS | 80 | 4 |
| MEQUON COLONY ESTATES | 75 | 0 |
| ALBERTA SUBDIVISION | 75 | 0 |
| ELM GROVE TERRACE | 75 | 1 |
| MEQUON PARC APARTMENTS LLC | 60 | 0 |
| HICKORY SHADE | 55 | 1 |
| STONECROFT CONDOMINIUM ASSN | 50 | 2 |
| WATERS EDGE CONDOMINIUM ASSOCIATION | 50 | 0 |
| CEDAR JUNCTION | 45 | 0 |
| VILLAGE GLEN APTS | 30 | 0 |
| PW LAKE VIEW ESTATES LLC | 30 | 2 |
| MEQUON WATER TRUST | 26 | 1 |
TRI Facilities (20)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Charter Steel-Saukville | 5.4M lbs |
| 2 | Cedar Valley Cheese | 233.0K lbs |
| 3 | Kemps LLC | 22.9K lbs |
| 4 | Kickhaeffer Manufacturing Co LLC | 7.5K lbs |
| 5 | Curia Wisconsin Inc. | 4.8K lbs |
| 6 | Pace Industries Grafton Div | 523 lbs |
| 7 | Kleen Test Products Corp | 500 lbs |
| 8 | Veolia Es Technical Solutions LLC | 393 lbs |
| 9 | Tms International LLC | 107 lbs |
| 10 | Rehlko-Saukville | 100 lbs |
| 11 | Mid-City Foundry United Div | 87 lbs |
| 12 | Super Steel LLC | 74 lbs |
| 13 | Jbt Corp | 20 lbs |
| 14 | Johnson Brass & Machine Foundry Inc | 11 lbs |
| 15 | Rockwell Automation Inc | 3 lbs |
| 16 | Miba Industrial Bearings U.S. LLC | 0 lbs |
| 17 | Molded Dimensions | 0 lbs |
| 18 | Carlson Tool & Manufacturing Corp. | 0 lbs |
| 19 | Guy & O'Neill Inc | 0 lbs |
| 20 | Performance Health Supply Inc | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Amcast Industrial Corporation | NPL Site | 46.86 |
Cities in Ozaukee (8)
Frequently Asked Questions
What is the environmental risk level in Ozaukee, Wisconsin? ▼
Are there Superfund sites in Ozaukee? ▼
How many toxic release facilities are in Ozaukee? ▼
What is the air quality in Ozaukee? ▼
Is the drinking water safe in Ozaukee? ▼
What environmental agencies cover Ozaukee? ▼
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.