Clean Water Act discharge permit · NPDES SD0020486

MOUNT VERNON, CITY OF, Mount Vernon, City Of, SD: NPDES SD0020486 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
0Pollutants with an effluent exceedance

MOUNT VERNON, CITY OF, held by Mount Vernon, City of, holds NPDES permit SD0020486, which discharges to Dry Run Creek. EPA’s file records it issued February 3, 2012 and expiring March 31, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	MOUNT VERNON, CITY OF
Permittee as filed	Mount Vernon, City of
NPDES ID	SD0020486
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	February 3, 2012
Expiration date	March 31, 2017
Issuing agency	SDDENR
Address	Mount Vernon, City Of, SD 57363
Receiving water	DRY RUN CREEK
Subwatershed	Dry Run-Firesteel Creek (HUC 101600110907)

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

Effluent limits and exceedances

10Pollutants on file
9Under a numeric limit
10With a violation of any kind
0With 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
Temperature, water deg. centigrade	2	84
Flow rate	2	84
BOD, 5-day, 20 deg. C	2	84
pH	2	84
Solids, total suspended	2	84
Nitrogen, ammonia total [as N]	2	84
Flow, total	1	42
Duration of discharge	1	42
E. coli, colony forming units [CFU]	2	36
Flowing, Receiving Stream	0	9

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES SD0020486.

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 SD0020486.

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

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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 SD0020486 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Mount Vernon, City of's NPDES permit SD0020486, a minor publicly owned treatment works discharging to Dry Run Creek, with the permit administratively continued past its expiration. The page lists 10 pollutants on file, of which 9 are under a numeric limit, and 0 pollutants with an effluent exceedance.