Clean Water Act discharge permit · NPDES NDG589314

WAKPALA LAGOON SYSTEM, Wakpala, SD: NPDES NDG589314 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

WAKPALA LAGOON SYSTEM, held by Standing Rock Sioux Tribe, holds NPDES permit NDG589314, which discharges to Oak Creek. EPA’s file records it issued February 8, 2016 and expiring December 31, 2020.

WAKPALA LAGOON SYSTEM, Wakpala, South Dakota: Coverage under a general permit NDG589314, held by Standing Rock Sioux Tribe; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued February 8, 2016, term to December 31, 2020; discharges to OAK CREEK.

BOD, 5-day, 20 deg. C: 0 limits, 12 violations of any kind, 0 effluent exceedances.
pH: 0 limits, 12 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 0 limits, 12 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 0 limits, 12 violations of any kind, 0 effluent exceedances.
Oil & Grease: 0 limits, 6 violations of any kind, 0 effluent exceedances.
Duration of discharge: 0 limits, 6 violations of any kind, 0 effluent exceedances.
Oil and grease visual: 0 limits, 6 violations of any kind, 0 effluent exceedances.

South Dakota holds 157 Publicly owned treatment works coverages of this permit type in EPA’s file; 27 were issued before NDG589314. Standing Rock Sioux Tribe holds 3 permits in South Dakota.

Other permits held by Standing Rock Sioux Tribe

SMEE SCHOOL DISTRICT 15-3, Fort Yates: NDG589307, issued April 25, 2016
RUNNING ANTELOPE LAGOON, Little Eagle: NDG589310, issued February 8, 2016

Coverages issued nearest NDG589314

December 31, 2014: SD DOT - JEFFERSON PORT OF ENTRY, Jefferson, SDGT27359, held by Union County Port of Entry
December 31, 2015: KADOKA, CITY OF, Kadoka, SDG922357, held by Kadoka, City of
January 5, 2016: LETCHER, TOWN OF, Letcher, SDG921776, held by Letcher, Town of
February 3, 2016: CRAZY HORSE SCHOOL, Wanblee, SDG589516
February 8, 2016: RUNNING ANTELOPE LAGOON, Little Eagle, NDG589310, held by Standing Rock Sioux Tribe
February 8, 2016: RED IRON WWTF, Red Iron Lake, Township Of, SDG589804, held by Red Iron Lagoons
February 8, 2016: VEBLEN FLATS WWTF, Veblen, SDG589805, held by Veblen Flats Housing Lagoons
February 8, 2016: LONG HOLLOW WATER SYSTEM, Agency Village, SDG589806, held by Long Hollow Housing Lagoons
February 8, 2016: PEEVER FLATS WWTF, Peever Flats, SDG589807, held by Peever Flats Housing Lagoons
February 8, 2016: ENEMY SWIM WWTF, Enemy Swim District, SDG589808, held by Enemy Swim Lagoon

WAKPALA LAGOON SYSTEM among its neighbors

EPA’s permit file holds 2 discharge permits in the Outlet Oak Creek subwatershed (HUC 101301021405), NDG589314 among them. Its county holds 9, 0 of them major permits; NDG589314 is a minor permit.

Other permits in the Outlet Oak Creek subwatershed (HUC 101301021405)

SMEE SCHOOL DISTRICT 15-3, Fort Yates: NDG589307, minor permit, discharging to OAK CREEK, permit term to December 31, 2020

Identity

Facility as filed	WAKPALA LAGOON SYSTEM
Permittee as filed	Standing Rock Sioux Tribe
NPDES ID	NDG589314
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	February 8, 2016
Expiration date	December 31, 2020
Address	Wakpala, SD 57658
Receiving water	OAK CREEK
Subwatershed	Outlet Oak Creek (HUC 101301021405)

Effluent limits and exceedances

7Pollutants on file
0Under a numeric limit
7With 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	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
BOD, 5-day, 20 deg. C	0	12	0
pH	0	12	0
Solids, total suspended	0	12	0
Flow, in conduit or thru treatment plant	0	12	0
Oil & Grease	0	6	0
Duration of discharge	0	6	0
Oil and grease visual	0	6	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES NDG589314.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES NDG589314.

Inspections

EPA’s inspection file holds no inspection for NPDES NDG589314.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES NDG589314.

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Nearby on the register

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

The WAKPALA LAGOON SYSTEM permit, filed to the Standing Rock Sioux Tribe and covering the city of Wakpala, South Dakota, is one of 2 NPDES permits in the Outlet Oak Creek subwatershed, this one included. Among the 7 POTW permits in its county, this one is one of 7 on the register, and 16.7% of the county's 6 POTW permits, this one included, were issued earlier than it. It records no pollutants under a numeric limit and no effluent exceedances.