Crook, 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 Crook in Oregon · Population: 25,651
TRI sites such as Endura Products; SDWIS systems such as PRINEVILLE, CITY OF; OCHOCO WEST WTR & SAN AUTHORITY; HIGH DESERT ESTATES anchor Crook, OR's EPA extract. Derived burden score 13/100 (Low 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 Crook include HIGH DESERT ESTATES; BARNES BUTTE HOA; WESTRIDGE SUBDIVISION, while Endura Products leads reported TRI pounds among local Form R filers. AQS median AQI 24 / peak 173 in 2024.
Burden score 13/100 (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 Crook -- 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 | 282 (77%) | 76 | 5 | 173 |
| 2023 | 267 (73%) | 86 | 6 | 171 |
| 2022 | 288 (80%) | 69 | 2 | 128 |
| 2021 | 281 (77%) | 75 | 6 | 190 |
| 2020 | 261 (72%) | 97 | 0 | 1033 |
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 (15)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| PRINEVILLE, CITY OF | 11,000 | 0 |
| OCHOCO WEST WTR & SAN AUTHORITY | 400 | 0 |
| HIGH DESERT ESTATES | 380 | 3 |
| HIGHLAND SUBDIVISION WD | 335 | 0 |
| IDLEWAY IMPROVEMENT DISTRICT | 183 | 0 |
| TERRACE MOBILE PLAZA | 152 | 0 |
| BARNES BUTTE HOA | 148 | 1 |
| QUAIL VALLEY PARK IMPROV DIST | 110 | 0 |
| WESTRIDGE SUBDIVISION | 78 | 4 |
| OCHOCO VALLEY HOME IMPROV DIST | 60 | 0 |
| MCDOUGAL WATER SYSTEM | 60 | 1 |
| DRY CREEK AIRPARK | 58 | 0 |
| SHOUN CROSSROADS | 41 | 0 |
| SUNSET HILLS DOMESTIC WATER ASSOCIATION | 41 | 0 |
| HAPPY HOLLOW WATER COMPANY | 40 | 0 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Endura Products | 0 lbs |
Cities in Crook (1)
Frequently Asked Questions
What is the environmental risk level in Crook, Oregon? ▼
Are there Superfund sites in Crook? ▼
How many toxic release facilities are in Crook? ▼
What is the air quality in Crook? ▼
Is the drinking water safe in Crook? ▼
What environmental agencies cover Crook? ▼
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.