Clean Water Act discharge permit · NPDES PAPIU009Z
FAIRCHILD SEMICONDUCTOR OPERATING AS ONSEMI, Mountain Top, PA: NPDES PAPIU009Z discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
FAIRCHILD SEMICONDUCTOR OPERATING AS ONSEMI, held by Fairchild Semiconductor Operating as Onsemi, holds NPDES permit PAPIU009Z. EPA’s file records it issued March 15, 2024 and expiring March 14, 2029. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
What the register holds for FAIRCHILD SEMICONDUCTOR OPERATING AS ONSEMI: its NPDES ID, its permit type and status, its dates, its address in Mountain Top, Pennsylvania. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES PAPIU009Z.
Identity
| Facility as filed | FAIRCHILD SEMICONDUCTOR OPERATING AS ONSEMI |
|---|---|
| Permittee as filed | Fairchild Semiconductor Operating as Onsemi |
| NPDES ID | PAPIU009Z |
| Permit status | Effective |
| Permit type | Individual industrial user permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 15, 2024 |
| Expiration date | March 14, 2029 |
| Issuing agency | Mountaintop Area Jt San Auth |
| Address | Mountain Top, PA 18707 |
| Other EPA IDs (FRS) | RCRA handler PAR000501882; ICIS-AIR source PA000238782 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES PAPIU009Z.
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES PAPIU009Z.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, PAPIU009Z.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID PAPIU009Z there.
Nearby on the register
- Discharge permits in Mountain Top
- Every permit record in Mountain Top, A to Z
- Discharge permits in Pennsylvania
- Every permit record in Pennsylvania, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.