Knox, NE
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 Knox in Nebraska · Population: 8,362
SDWIS systems such as CREIGHTON, CITY OF; BLOOMFIELD, CITY OF; CROFTON, CITY OF anchor Knox, NE's EPA extract. Derived burden score 15/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
No TRI Form R facilities sit in Knox in this extract; water coverage still lists CREIGHTON, CITY OF; BLOOMFIELD, CITY OF; CROFTON, CITY OF. AQS monitors logged median AQI 36 / peak 108 in 2024.
Burden score 15/100 (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 Knox -- 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 | 300 (92%) | 26 | 1 | 108 |
| 2023 | 271 (79%) | 56 | 13 | 151 |
| 2022 | 319 (90%) | 36 | 0 | 100 |
| 2021 | 317 (89%) | 36 | 5 | 112 |
| 2020 | 341 (93%) | 24 | 0 | 84 |
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 Nebraska, see the EPA's AirNow.gov.
Water Systems (10)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CREIGHTON, CITY OF | 1,154 | 1 |
| BLOOMFIELD, CITY OF | 1,025 | 1 |
| CROFTON, CITY OF | 754 | 0 |
| SANTEE UTILITY COMMISSION | 630 | 7 |
| WAUSA, VILLAGE OF | 592 | 0 |
| WEST KNOX RWD | 565 | 2 |
| VERDIGRE, VILLAGE OF | 552 | 0 |
| NIOBRARA, VILLAGE OF | 365 | 0 |
| WINNETOON, VILLAGE OF | 75 | 3 |
| CENTER, VILLAGE OF | 74 | 1 |
Cities in Knox (8)
Frequently Asked Questions
What is the environmental risk level in Knox, Nebraska? ▼
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How many toxic release facilities are in Knox? ▼
What is the air quality in Knox? ▼
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What environmental agencies cover Knox? ▼
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.