Clean Water Act discharge permit · NPDES SD0020541

VIBORG, CITY OF, Viborg, SD: NPDES SD0020541 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
4Pollutants with an effluent exceedance

VIBORG, CITY OF, held by Viborg, City of, holds NPDES permit SD0020541, which discharges to Turkey Ridge Creek. EPA’s file records it issued April 1, 2018 and expiring March 31, 2023. 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	VIBORG, CITY OF
Permittee as filed	Viborg, City of
NPDES ID	SD0020541
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	April 1, 2018
Expiration date	March 31, 2023
Issuing agency	SDDANR
Address	Viborg, SD 57070
Receiving water	TURKEY RIDGE CREEK
Subwatershed	Outlet Turkey Ridge Creek (HUC 101701021207)
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

15Pollutants on file
10Under a numeric limit
15With a violation of any kind
4With 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
Nitrogen, ammonia total [as N]	12	104	20	April 30, 2026	345% over the limit
BOD, 5-day, 20 deg. C	2	89	3	April 30, 2019	18% over the limit
pH	2	89	3	July 31, 2024
Solids, total suspended	2	87	3	November 30, 2005	48% over the limit
Temperature, water deg. centigrade	2	86	0
Flow rate	2	84	0
Duration of discharge	1	42	0
Flow, total	1	37	0
Chlorine, total residual	0	34	0
Coliform, fecal general	0	34	0
E. coli, colony forming units [CFU]	2	16	0
Flowing, Receiving Stream	1	10	0
Flow, total	0	5	0
Nitrogen, total [as N]	0	3	0
Phosphorus, total [as P]	0	2	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 SD0020541.

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 SD0020541 there.

Nearby on the register

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