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Clean Water Act discharge permit · NPDES MS0042455

CANTON MUNICIPAL UTILITIES, HCR POTW, Canton, MS: NPDES MS0042455 discharge permit, effluent exceedances, inspections, penalties

CANTON MUNICIPAL UTILITIES, HCR POTW, held by CANTON MUNICIPAL UTILITIES, HYDROGRAPH CONTROLLED RELEASE POTW, holds NPDES permit MS0042455, which discharges to Big Black River. EPA’s file records it issued March 23, 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 filedCANTON MUNICIPAL UTILITIES, HCR POTW
Permittee as filedCANTON MUNICIPAL UTILITIES, HYDROGRAPH CONTROLLED RELEASE POTW
NPDES IDMS0042455
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedMarch 23, 2017
Expiration dateFebruary 28, 2022
Issuing agencyMDEQ
AddressCanton, MS 39046
Receiving waterBIG BLACK RIVER

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. C1219033February 28, 202699,999% over the limit
E. coli07928February 28, 202699,999% over the limit
Solids, suspended percent removal26625February 28, 2026243% over the limit
Solids, total suspended1217917February 28, 20264,554% over the limit
BOD, 5-day, percent removal25114June 30, 2025186% over the limit
Nitrogen, ammonia total [as N]6446December 31, 2025478% over the limit
Phosphorus, total [as P]151104December 31, 20255,081% over the limit
Flow, in conduit or thru treatment plant4464December 31, 202511,835% over the limit
Coliform, fecal general8204March 31, 202299,999% over the limit
Nitrogen, total [as N]151112December 31, 20255,161% over the limit
Mercury, total recoverable0112February 29, 20128,125% over the limit
pH4680
Oxygen, dissolved [DO]2160

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
August 28, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
August 9, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
August 2, 2026PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)]ST6
July 27, 2026Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environmentST6
February 28, 2023Reporting Violations - Failure to Submit DMRsST6

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, MS0042455.

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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 MS0042455 there.

Nearby on the register

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