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Clean Water Act discharge permit · NPDES AR0021971

MARION, CITY OF, Marion, AR: NPDES AR0021971 discharge permit, effluent exceedances, inspections, penalties

MARION, CITY OF, held by Marion, City of, holds NPDES permit AR0021971, which discharges to Mississippi R. EPA’s file records it issued August 28, 2017 and expiring September 30, 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 filedMARION, CITY OF
Permittee as filedMarion, City of
NPDES IDAR0021971
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
IssuedAugust 28, 2017
Expiration dateSeptember 30, 2022
AddressMarion, AR 72364
Receiving waterMississippi R
Receiving water impaired303(D) Listed
SubwatershedBrinkley Bayou-Mississippi River (HUC 080101000702)
Program components on filePOTW, Pretreatment
NAICS221320 – Sewage Treatment Facilities
SIC4952 – 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

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
Nitrogen, ammonia total [as N]0133110September 30, 2014447% over the limit
BOD, 5-day, 20 deg. C29983July 31, 2026137% over the limit
Solids, total suspended211479June 30, 2023410% over the limit
Coliform, fecal general46939August 31, 20251,103% over the limit
BOD, carbonaceous [5 day, 20 C]04527August 31, 20142,514% over the limit
Chlorine, total residual12512February 28, 2011900% over the limit
Oxygen, dissolved [DO]1173April 30, 200210% over the limit
pH2302March 31, 2022
Flow, in conduit or thru treatment plant2280
Nitrite + Nitrate total [as N]070
Phosphorus, total [as P]070
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia070
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas070
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia070
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas070
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia070
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas070
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia070
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas070
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia070
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas070
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex160
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas160
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex160
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas160
Coef Of Var Static Renewal 48Hr Acute D. pulex160
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas160
Overflows150
Overflow volume [SS0 volume, CSO volume]150
Whole effluent toxicity - retest #1120
WET, sublethal retest #1120
Whole Effluent Toxicity - Retest #3120
Whole Effluent Toxicity, Sub-Lethal Retest #3120
Whole effluent toxicity - retest #2110
WET, sublethal retest #2110

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES AR0021971.

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 AR0021971 there.

Nearby on the register

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

What this page shows

This public-records page covers the Clean Water Act discharge permit NPDES AR0021971, held by Marion, City of, a major discharger in the publicly owned treatment works program that discharges to the Mississippi R. The permit is administratively continued, and the page lists 21 pollutants under a numeric limit and 8 pollutants with an effluent exceedance.