Clean Water Act discharge permit · NPDES TN0080888
HEMLOCK SEMICONDUCTOR, L.L.C., Clarksville, TN: NPDES TN0080888 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 12Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
HEMLOCK SEMICONDUCTOR, L.L.C., held by Hemlock Semiconductor, L.L.C., holds NPDES permit TN0080888, which discharges to Spring Cr. EPA’s file records it issued December 1, 2009 and expiring May 31, 2014. 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 HEMLOCK SEMICONDUCTOR, L.L.C.: its NPDES ID, its permit type and status, its dates, its address in Clarksville, Tennessee, its receiving water, and 12 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TN0080888.
Identity
| Facility as filed | HEMLOCK SEMICONDUCTOR, L.L.C. |
|---|---|
| Permittee as filed | Hemlock Semiconductor, L.L.C. |
| NPDES ID | TN0080888 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 1, 2009 |
| Expiration date | May 31, 2014 |
| Address | Clarksville, TN 37040 |
| Receiving water | SPRING CR |
| Subwatershed | Spring Creek (HUC 051302060603) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 12Pollutants on file
- 12Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Nitrite + Nitrate total [as N] | 7 | 0 | 0 | ||
| Phosphorus, total [as P] | 7 | 0 | 0 | ||
| Temperature, water deg. centigrade | 6 | 0 | 0 | ||
| Solids, total dissolved | 6 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Solids, total suspended | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Chlorine, total residual | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Rainfall | 1 | 0 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 0 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Chrpimephales | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES TN0080888.
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 TN0080888.
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, TN0080888.
Start the watch
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- One watershed — $2,990/year
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How we handle your data → Privacy
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 TN0080888 there.
Nearby on the register
- Discharge permits in Clarksville
- Every permit record in Clarksville, A to Z
- Discharge permits in Tennessee
- Every permit record in Tennessee, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.