Clean Water Act discharge permit · NPDES TNG110310
MMC MATERIALS, INC. (MACON ROAD), Cordova, TN: NPDES TNG110310 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MMC MATERIALS, INC. (MACON ROAD), held by MMC Materials, Inc., holds NPDES permit TNG110310, which discharges to Wolf. EPA’s file records it issued January 27, 2022 and expiring October 31, 2022. 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 | MMC MATERIALS, INC. (MACON ROAD) |
|---|---|
| Permittee as filed | MMC Materials, Inc. |
| NPDES ID | TNG110310 |
| 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 | January 27, 2022 |
| Expiration date | October 31, 2022 |
| Issuing agency | TDEC - DWR |
| Address | Cordova, TN 38016 |
| Receiving water | Wolf |
| Subwatershed | Grays Creek (HUC 080102100304) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 4Pollutants on file
- 4Under a numeric limit
- 3With 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 |
|---|---|---|---|---|---|
| pH | 2 | 86 | 86 | March 31, 2021 | |
| Solids, total suspended | 1 | 49 | 49 | September 30, 2025 | 2,640% over the limit |
| Iron, total [as Fe] | 1 | 1 | 1 | March 31, 2008 | 236% over the limit |
| Flow, in conduit or thru treatment plant | 1 | 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 TNG110310.
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 TNG110310 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.