Clean Water Act discharge permit · NPDES SD0022179

GREGORY, CITY OF, Gregory, SD: NPDES SD0022179 discharge permit, effluent exceedances, inspections, penalties

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

GREGORY, CITY OF, held by Gregory, City of, holds NPDES permit SD0022179, which discharges to Unnamed Trib. Of Ponca Creek. EPA’s file records it issued March 14, 2014 and expiring March 31, 2019. 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	GREGORY, CITY OF
Permittee as filed	Gregory, City of
NPDES ID	SD0022179
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	March 14, 2014
Expiration date	March 31, 2019
Issuing agency	SDDENR
Address	Gregory, SD 57533
Receiving water	Unnamed Trib. of Ponca Creek
Subwatershed	Lake Dolton-Ponca Creek (HUC 101500010104)
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

18Pollutants on file
10Under a numeric limit
18With 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]	4	87	10	March 31, 2022	823% over the limit
pH	2	85	8	November 30, 2018
Solids, total suspended	2	81	7	October 31, 2014	30% over the limit
Coliform, fecal general	0	49	1	June 30, 2001	15% over the limit
Temperature, water deg. centigrade	2	76	0
BOD, 5-day, 20 deg. C	2	76	0
Flow rate	2	74	0
Duration	0	21	0
Chlorine, total residual	0	21	0
Flow, total	1	16	0
Duration of discharge	1	15	0
Nitrogen, total [as N]	0	6	0
Phosphorus, total [as P]	0	6	0
Flow, in conduit or thru treatment plant	0	4	0
E. coli, colony forming units [CFU]	2	3	0
Stream flow, estimated	1	3	0
Oil & Grease	0	3	0
Oil and grease visual	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 SD0022179.

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 SD0022179 there.

Nearby on the register

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

This public-records page covers NPDES permit SD0022179, held by Gregory, City of in Gregory, SD, which discharges to Unnamed Trib. of Ponca Creek within the Lake Dolton-Ponca Creek watershed (HUC 101500010104). The permit is listed as administratively continued, a minor discharger class, with 4 pollutants under a numeric limit and 4 pollutants with an effluent exceedance. Status and dates reflect EPA's permit file as loaded on October 14, 2026.