Clean Water Act discharge permit · NPDES OH0008621
PORTSMOUTH WATER TREATMENT PLANT, Portsmouth, OH: NPDES OH0008621 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
PORTSMOUTH WATER TREATMENT PLANT, held by Portsmouth Water Treatment Plant, holds NPDES permit OH0008621. EPA’s file records it issued February 3, 2025 and expiring February 28, 2026. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PORTSMOUTH WATER TREATMENT PLANT |
|---|---|
| Permittee as filed | Portsmouth Water Treatment Plant |
| NPDES ID | OH0008621 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | February 3, 2025 |
| Expiration date | February 28, 2026 |
| Address | Portsmouth, OH 45662 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Munn Run-Ohio River (HUC 050901030606) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 4With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 2 | 3 | 2 | March 31, 2006 | 689% over the limit |
| Solids, total suspended | 6 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| pH | 4 | 2 | 0 | ||
| Trihalomethane, tot. | 4 | 0 | 0 | ||
| Bypass Volume | 2 | 0 | 0 | ||
| Bypass valve | 2 | 0 | 0 | ||
| Bypass of treatment | 2 | 0 | 0 |
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 OH0008621.
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
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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 OH0008621 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.