Clean Water Act discharge permit · NPDES SD0020028

MOBRIDGE, CITY OF, Mobridge, SD: NPDES SD0020028 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
34Pollutants under a numeric limit
6Pollutants with an effluent exceedance

MOBRIDGE, CITY OF, held by Mobridge, City of, holds NPDES permit SD0020028, which discharges to Lake Oahe - Missouri River. EPA’s file records it issued June 23, 2011 and expiring June 30, 2016. 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	MOBRIDGE, CITY OF
Permittee as filed	Mobridge, City of
NPDES ID	SD0020028
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	June 23, 2011
Expiration date	June 30, 2016
Issuing agency	SDDENR
Address	Mobridge, SD 57601
Receiving water	LAKE OAHE - MISSOURI RIVER
Subwatershed	Indian Creek Bay-Lake Oahe (HUC 101301021704)
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

34Pollutants on file
34Under a numeric limit
15With a violation of any kind
6With 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
Coliform, total general	2	12	7	June 30, 2019	700% over the limit
E. coli, colony forming units [CFU]	4	9	6	July 31, 2022	10,198% over the limit
BOD, 5-day, 20 deg. C	3	9	2	February 28, 2009	96% over the limit
pH	2	5	1	May 31, 2013
Coliform, fecal general	2	1	1	September 30, 2002	300% over the limit
Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia	1	1	1	June 30, 2001
Solids, total suspended	3	6	0
Temperature, water deg. centigrade	2	5	0
Flow rate	2	4	0
Nitrogen, ammonia total [as N]	2	4	0
Oil and grease, hexane extr method	1	2	0
Chlorine, total residual	1	2	0
BOD, 5-day, percent removal	1	2	0
Solids, suspended percent removal	1	2	0
Oil and grease visual	1	2	0
Cyanide, weak acid, dissociable	2	0	0
Cyanide, total [as CN]	2	0	0
Arsenic, total recoverable	2	0	0
Selenium, total recoverable	2	0	0
Thallium, total recoverable	2	0	0
Beryllium, total recoverable [as Be]	2	0	0
Nickel, total recoverable	2	0	0
Silver total recoverable	2	0	0
Zinc, total recoverable	2	0	0
Cadmium, total recoverable	2	0	0
Lead, total recoverable	2	0	0
Chromium, total recoverable	2	0	0
Copper, total recoverable	2	0	0
Molybdenum, total recoverable	2	0	0
Antimony, total recoverable	2	0	0
Phenols	2	0	0
Mercury, total [as Hg]	2	0	0
Hardness, total [as CaCO3]	1	0	0
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas	1	0	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 SD0020028.

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

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, SD0020028.

Start the watch

How we handle your data → Privacy

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 SD0020028 there.

Nearby on the register

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

The page covers Clean Water Act NPDES permit SD0020028, held by MOBRIDGE, CITY OF (Mobridge, City of), a Major Discharger in the Indian Creek Bay-Lake Oahe (HUC 101301021704) subwatershed that discharges to LAKE OAHE - MISSOURI RIVER. The permit is administratively continued, with 6 pollutants under a numeric limit and 6 pollutants with an effluent exceedance listed in the facts. The permit was issued June 23, 2011 and expires June 30, 2016, as of the October 14, 2026 load date.