Milwaukee, 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 Milwaukee in Wisconsin · Population: 927,656
TRI sites such as Wpc Technologies; Ppg Industries Inc-Oak Creek; Oak Creek Site; SDWIS systems such as MILWAUKEE WATERWORKS; WEST ALLIS WATERWORKS; WAUWATOSA WATERWORKS; NPL sites such as Fadrowski Drum Disposal; Moss-American Co., Inc. (Kerr-McGee Oil Co.) anchor Milwaukee, WI's EPA extract. Derived burden score 82/100 (High 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 Milwaukee include OAK CREEK WATERWORKS; SHOREWOOD WATERWORKS; EMERALD WOODS CONDOS, while Wpc Technologies leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 147 in 2024.
Burden score 82/100 (High 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 Milwaukee -- 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 Milwaukee, WI: EPA TRI 2023 reporting year
Same facilities, both years
+20.4%
103 facilities that filed in 2022 and 2023
Whole inventory
+20.3%
1.7 million lb → 2.1 million lb, every facility that filed
Between the two reporting years, 3 facilities filed for the first time and 6 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Milwaukee, WI's total reported releases rose from 1.7 million lb in 2022 to 2.0 million lb in 2023, based on EPA TRI filings.
- Milwaukee, WI's off-site transfers rose from 954.4 thousand lb in 2022 to 1.5 million lb in 2023, based on EPA TRI filings.
- Milwaukee, WI's air releases fell from 710.7 thousand lb in 2022 to 502.3 thousand lb in 2023, based on EPA TRI filings.
- Milwaukee, WI's chemicals reported rose from 84 in 2022 to 95 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 | 251 (69%) | 109 | 6 | 147 |
| 2023 | 166 (45%) | 180 | 15 | 250 |
| 2022 | 192 (53%) | 167 | 6 | 143 |
| 2021 | 162 (44%) | 196 | 7 | 129 |
| 2020 | 204 (56%) | 157 | 4 | 169 |
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 (37)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| MILWAUKEE WATERWORKS | 626,000 | 0 |
| WEST ALLIS WATERWORKS | 63,240 | 0 |
| WAUWATOSA WATERWORKS | 49,064 | 0 |
| NORTH SHORE WATER COMMISSION | 35,598 | 0 |
| OAK CREEK WATERWORKS | 32,104 | 5 |
| FRANKLIN WATER UTILITY | 22,500 | 0 |
| SOUTH MILWAUKEE WATERWORKS | 21,340 | 0 |
| CUDAHY WATERWORKS | 18,659 | 0 |
| GREENDALE WATERWORKS | 14,393 | 0 |
| WHITEFISH BAY WATERWORKS | 14,272 | 0 |
| SHOREWOOD WATERWORKS | 13,535 | 1 |
| GLENDALE WATERWORKS | 12,883 | 0 |
| BROWN DEER WATERWORKS | 12,741 | 0 |
| FOX POINT WATERWORKS | 6,808 | 0 |
| ROBERT WILLIAM PARK WATER ASSOCIATION INC | 1,065 | 0 |
| PIONEER ESTATES OF DELAVAN | 400 | 0 |
| BEECHWOOD FARMS ESTATES | 300 | 0 |
| BROWNS LAKE MOBILE HOME CT | 225 | 0 |
| LAKEWOOD VILLAGE | 160 | 0 |
| EMERALD WOODS CONDOS | 150 | 2 |
| OAKTON BEACH | 144 | 0 |
| LAUREL LAKES 608 | 80 | 0 |
| GRAND AVE APARTMENTS | 80 | 1 |
| LINDEN LANE APTS 141 | 75 | 0 |
| ALLEN ESTATES LLC | 75 | 0 |
| MISSION LAKES II | 68 | 0 |
| LAKEVIEW HEIGHTS MOBILE HOME PARK | 66 | 0 |
| MEADOWS CONDOMINIUMS ASSOC LTD | 50 | 0 |
| LAUREL LAKES 508 | 50 | 0 |
| WILLIAMSBURG 206 | 48 | 1 |
| PARKVIEW APARTMENTS | 45 | 8 |
| HEIDEL RD APTS 139 | 40 | 3 |
| HEIDEL RD APTS 152 | 40 | 0 |
| LINCOLN CREST APARTMENTS | 32 | 0 |
| WILLIAMSBURG 220 | 32 | 0 |
| ROSEMORE VILLAGE | 32 | 0 |
| RIVER GARDEN APTS | 25 | 2 |
TRI Facilities (50)
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Fadrowski Drum Disposal | Deleted NPL Site | 31.08 |
| Moss-American Co., Inc. (Kerr-McGee Oil Co.) | NPL Site | 32.14 |
Cities in Milwaukee (16)
Frequently Asked Questions
What is the environmental risk level in Milwaukee, Wisconsin? ▼
Are there Superfund sites in Milwaukee? ▼
How many toxic release facilities are in Milwaukee? ▼
What is the air quality in Milwaukee? ▼
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What environmental agencies cover Milwaukee? ▼
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.