EPA Air · stack tests by county and year
Air-emissions stack tests in Sarpy County, Nebraska, 2025
- 5Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Sarpy County, Nebraska during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Sarpy County facility page.
Sarpy County, Nebraska, 2025
Air-emissions stack tests in Sarpy County, other years
What stands out
- Stack tests in Sarpy County, Nebraska, fell from 11 in 2024, the previous year on file, to 5 in 2025.
- The county’s file for stack tests holds 7 years of events, from 2018 through 2025.
- Its 5 stack tests rank 9th of the 18 county cells in Nebraska for 2025.
- Its 5 stack tests are 3.4% of the 145 the state’s file holds for 2025.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Sarpy County, Nebraska, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-12 | DARLING INGREDIENTS INC | Pass | State |
| 2025-09-23 | FIREBALL GROUP LLC DATA CENTER — high-priority violation on file | N/A | State |
| 2025-09-22 | FIREBALL GROUP LLC DATA CENTER — high-priority violation on file | Pass | State |
| 2025-05-09 | OPPD SARPY COUNTY STATION | Pass | State |
| 2025-02-21 | FIREBALL GROUP LLC DATA CENTER — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Sarpy county, NE, for 2025. Stack tests recorded in 2025: 5.