Jefferson, OR
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 Jefferson in Oregon · Population: 24,973
TRI sites such as Wilbur-Ellis Madras; SDWIS systems such as DESCHUTES VALLEY WATER DIST; MADRAS, CITY OF; METOLIUS MEADOWS PROP OWNERS anchor Jefferson, OR's EPA extract. Derived burden score 1/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Wilbur-Ellis Madras is among the largest Form R filers reporting in Jefferson; no SDWIS system here carries an active health-based flag. AQS median AQI 26 / peak 142 in 2024.
Burden score 1/100 (Low 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 Jefferson -- 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.
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 | 289 (79%) | 76 | 1 | 142 |
| 2023 | 266 (73%) | 93 | 3 | 238 |
| 2022 | 272 (75%) | 92 | 1 | 108 |
| 2021 | 282 (77%) | 77 | 4 | 173 |
| 2020 | 258 (71%) | 92 | 3 | 1135 |
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 Oregon, see the EPA's AirNow.gov.
Water Systems (3)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| DESCHUTES VALLEY WATER DIST | 11,700 | 0 |
| MADRAS, CITY OF | 3,940 | 0 |
| METOLIUS MEADOWS PROP OWNERS | 285 | 0 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Wilbur-Ellis Madras | 0 lbs |
Cities in Jefferson (2)
Frequently Asked Questions
What is the environmental risk level in Jefferson, Oregon? ▼
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How many toxic release facilities are in Jefferson? ▼
What is the air quality in Jefferson? ▼
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What environmental agencies cover Jefferson? ▼
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.