Clean Water Act discharge permit · NPDES MSP090345
CATERPILLAR INC, Corinth, MS: NPDES MSP090345 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
CATERPILLAR INC holds NPDES permit MSP090345, which discharges to Ms0021652 - Corinth Potw. EPA’s file records it issued March 21, 2017 and expiring February 28, 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 | CATERPILLAR INC |
|---|---|
| Permittee as filed | CATERPILLAR INC |
| NPDES ID | MSP090345 |
| Permit status | Effective |
| Permit type | Individual industrial user permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 21, 2017 |
| Expiration date | February 28, 2022 |
| Issuing agency | MDEQ |
| Address | Corinth, MS 38834 |
| Receiving water | MS0021652 - CORINTH POTW |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 11Pollutants on file
- 11Under a numeric limit
- 5With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Copper, total recoverable | 4 | 6 | 6 | February 28, 2021 | 142% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 15 | 1 | June 30, 2011 | 17% over the limit |
| pH | 2 | 13 | 1 | May 31, 2020 | |
| Total toxic organics [TTO] [40 CFR433] | 2 | 1 | 1 | December 31, 2024 | 3% over the limit |
| Cadmium, total recoverable | 4 | 4 | 0 | ||
| Cyanide, total [as CN] | 4 | 0 | 0 | ||
| Nickel, total recoverable | 4 | 0 | 0 | ||
| Silver total recoverable | 4 | 0 | 0 | ||
| Zinc, total recoverable | 4 | 0 | 0 | ||
| Lead, total recoverable | 4 | 0 | 0 | ||
| Chromium, total recoverable | 4 | 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 MSP090345.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, MSP090345.
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 MSP090345 there.
Nearby on the register
- Discharge permits in Corinth
- Every permit record in Corinth, A to Z
- Discharge permits in Mississippi
- Every permit record in Mississippi, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.