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Clean Water Act discharge permit · NPDES MS0025925

WALNUT POTW, Walnut, MS: NPDES MS0025925 discharge permit, effluent exceedances, inspections, penalties

WALNUT POTW holds NPDES permit MS0025925, which discharges to Muddy Creek. EPA’s file records it issued April 4, 2018 and expiring March 31, 2023. 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 filedWALNUT POTW
Permittee as filedWALNUT POTW
NPDES IDMS0025925
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedApril 4, 2018
Expiration dateMarch 31, 2023
Issuing agencyMDEQ
AddressWalnut, MS 38683
Receiving waterMUDDY CREEK
SubwatershedBig Creek-Muddy Creek (HUC 080102070604)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
BOD, 5-day, 20 deg. C627133December 31, 2005253% over the limit
Solids, total suspended626022December 31, 2005187% over the limit
Solids, suspended percent removal0226December 31, 2005213% over the limit
Oxygen, dissolved [DO]074December 31, 200573% over the limit
BOD, 5-day, percent removal1453December 31, 2003201% over the limit
Flow, in conduit or thru treatment plant4271March 31, 2000211% over the limit
Nitrogen, ammonia total [as N]61740
pH2840
Flow, total0200

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

DateWhat EPA recordedAgency
September 16, 2022Management Practice Violations - Improper Operation and MaintenanceST6
September 16, 2022Monitoring Violations - Frequency of Sampling ViolationST6

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, MS0025925.

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  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/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 MS0025925 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.