Clean Water Act discharge permit · NPDES NHG250392
ST. GOBAIN PPO/CHEMFAB CORP, Merrimack, NH: NPDES NHG250392 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
ST. GOBAIN PPO/CHEMFAB CORP, held by ST. Gobain PPO/Chemfab Corp, holds NPDES permit NHG250392, which discharges to Merrimack River. EPA’s file records it issued November 28, 2008 and expiring July 31, 2013. 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 | ST. GOBAIN PPO/CHEMFAB CORP |
|---|---|
| Permittee as filed | ST. Gobain PPO/Chemfab Corp |
| NPDES ID | NHG250392 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 28, 2008 |
| Expiration date | July 31, 2013 |
| Address | Merrimack, NH 03054 |
| Receiving water | MERRIMACK RIVER |
| Subwatershed | Little Cohas Brook-Merrimack River (HUC 010700060804) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 4Pollutants on file
- 4Under a numeric limit
- 4With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 4 | 54 | 38 | February 28, 2006 | 69,950% over the limit |
| pH | 4 | 36 | 2 | September 30, 2010 | |
| Chlorine, total residual | 1 | 5 | 1 | March 31, 2011 | 22,200% over the limit |
| Temperature, water deg. fahrenheit | 2 | 30 | 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 NHG250392.
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.
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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 NHG250392 there.
Nearby on the register
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- Every permit record in Merrimack, A to Z
- Discharge permits in New Hampshire
- Every permit record in New Hampshire, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.