Portage, 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 Portage in Wisconsin · Population: 70,375
TRI sites such as Foremost Farms USA; McCain Foods USA Inc; Silgan Containers Manufacturing Corp; SDWIS systems such as STEVENS POINT WATERWORKS; PLOVER WATERWORKS; TREMAIN MOBILE HOME PARK anchor Portage, WI'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 Portage include PLOVER WATERWORKS; TREMAIN MOBILE HOME PARK; MAIZEFIELD MHC (MANUFACTURED HOME COMMUNITY), while Foremost Farms USA leads reported TRI pounds among local Form R filers. No AQS county monitors report here.
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 Portage -- 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 Portage, WI: EPA TRI 2023 reporting year
Same facilities, both years
+13.6%
10 facilities that filed in 2022 and 2023
Whole inventory
-5.4%
1.5 million lb → 1.4 million lb, every facility that filed
These two measures point in opposite directions. Releases from the facilities present in both years rose, while the inventory-wide total fell. The difference is which facilities filed, not a different estimate of the same plants.
Between the two reporting years, 0 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Portage, WI's total reported releases rose from 1.2 million lb in 2022 to 1.4 million lb in 2023, based on EPA TRI filings.
- Portage, WI's land releases rose from 1.1 thousand lb in 2022 to 1.5 thousand lb in 2023, based on EPA TRI filings.
- Portage, WI's water releases rose from 1.2 million lb in 2022 to 1.3 million lb in 2023, based on EPA TRI filings.
- Portage, WI's off-site transfers rose from 6.9 thousand lb in 2022 to 7.3 thousand lb in 2023, based on EPA TRI filings.
Water Systems (19)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| STEVENS POINT WATERWORKS | 26,717 | 0 |
| PLOVER WATERWORKS | 13,486 | 1 |
| TREMAIN MOBILE HOME PARK | 475 | 10 |
| MAIZEFIELD MHC (MANUFACTURED HOME COMMUNITY) | 145 | 1 |
| SHADY HILL MOBILE HOME PARK | 140 | 2 |
| LAKEVIEW ESTATES MHP | 112 | 0 |
| COUNTRY AIRE MOBILE HOME COURT LLC | 98 | 0 |
| PINE GROVE VILLA | 75 | 1 |
| OAK LANE MOBILE HOME PARK | 60 | 0 |
| PATRICIA LAKE MANUFACTURED HOUSING COMMUNITY | 56 | 0 |
| FISHERMANS PARADISE MHP | 54 | 0 |
| ACORN ACRES MHP | 52 | 1 |
| HILLY HAVEN LLC | 45 | 1 |
| WEST GATE ESTATES MOBILE HMS | 43 | 0 |
| MARSHVIEW TERRACE | 40 | 13 |
| MEADOWBROOK MOBILE HOME PARK | 39 | 0 |
| COULEE MANOR TRAILER PARK | 39 | 0 |
| WILLOW LANE ESTATES | 34 | 0 |
| KEYES LAKE MOBILE HOME PARK | 30 | 4 |
TRI Facilities (14)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Foremost Farms USA | 9.8M lbs |
| 2 | McCain Foods USA Inc | 5.8M lbs |
| 3 | Silgan Containers Manufacturing Corp | 89.4K lbs |
| 4 | Steel King Industries Inc | 59.1K lbs |
| 5 | Water Renewal Center | 44.2K lbs |
| 6 | Donaldson Co Inc | 29.5K lbs |
| 7 | Flint Hills Resources Pine Bend LLC Junction City Terminal | 18.1K lbs |
| 8 | Stevens Point Mill | 8.9K lbs |
| 9 | Online Packaging Inc | 2.1K lbs |
| 10 | Felker Brothers Corp | 39 lbs |
| 11 | Oldcastle Lawn & Garden | 0 lbs |
| 12 | Gamber-Johnson LLC | 0 lbs |
| 13 | Gamber Johnson | 0 lbs |
| 14 | Neenah Paper | 0 lbs |
Cities in Portage (5)
Frequently Asked Questions
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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.