Clean Water Act discharge permit · NPDES MS0024805
CALEDONIA POTW, Caledonia, MS: NPDES MS0024805 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
CALEDONIA POTW holds NPDES permit MS0024805, which discharges to Buttahatchee River. EPA’s file records it issued June 20, 2017 and expiring May 31, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CALEDONIA POTW |
|---|---|
| Permittee as filed | CALEDONIA POTW |
| NPDES ID | MS0024805 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 20, 2017 |
| Expiration date | May 31, 2022 |
| Issuing agency | MDEQ |
| Address | Caledonia, MS 39740 |
| Receiving water | BUTTAHATCHEE RIVER |
| Subwatershed | Honnoll Mill Creek-Buttahatchee River (HUC 031601030603) |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 13Pollutants on file
- 10Under a numeric limit
- 13With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 8 | 76 | 28 | December 31, 2025 | 580% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 62 | 14 | December 31, 2025 | 113% over the limit |
| Solids, suspended percent removal | 1 | 20 | 12 | December 31, 2023 | 430% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 28 | 8 | December 31, 2013 | 649% over the limit |
| E. coli | 2 | 12 | 8 | December 31, 2025 | 4,662% over the limit |
| BOD, 5-day, percent removal | 1 | 14 | 6 | December 31, 2021 | 147% over the limit |
| Chlorine, total residual | 2 | 20 | 4 | December 31, 2025 | 99,999% over the limit |
| Oxygen, dissolved [DO] | 1 | 10 | 4 | December 31, 2013 | 58% over the limit |
| Coliform, fecal general | 0 | 22 | 2 | December 31, 2008 | 3,800% over the limit |
| pH | 2 | 15 | 1 | December 31, 2011 | |
| Flow, in conduit or thru treatment plant | 2 | 16 | 0 | ||
| Nitrogen, total [as N] | 0 | 4 | 0 | ||
| Phosphorus, total [as P] | 0 | 4 | 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 MS0024805.
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, MS0024805.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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 MS0024805 there.
Nearby on the register
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- Every permit record in Mississippi, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.