Clean Water Act discharge permit · NPDES SD0030996

STANDING ROCK WATER TREATMENT PLANT, Wakpala, SD: NPDES SD0030996 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
7Pollutants under a numeric limit
0Pollutants with an effluent exceedance

STANDING ROCK WATER TREATMENT PLANT, held by Standing Rock MR & I Water Department, holds NPDES permit SD0030996, which discharges to Unnam Trib To Fisher Crk, Trib To Oahe Reservoir. EPA’s file records it issued September 19, 2011 and expiring September 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	STANDING ROCK WATER TREATMENT PLANT
Permittee as filed	Standing Rock MR & I Water Department
NPDES ID	SD0030996
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
Issued	September 19, 2011
Expiration date	September 30, 2016
Address	Wakpala, SD 57658
Receiving water	UNNAM TRIB TO FISHER CRK, TRIB TO OAHE RESERVOIR
Subwatershed	Fisher Creek-Lake Oahe (HUC 101301021205)
NAICS	221310 – Water Supply and Irrigation Systems
SIC	4941 – Water Supply

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

9Pollutants on file
7Under a numeric limit
9With 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
pH	4	114
Solids, total suspended	4	114
Flow, total	4	114
Aluminum, total recoverable	2	57
Chlorine, total residual	2	53
Oil & Grease	1	32
Oil and grease visual	1	32
Nitrogen, total [as N]	0	7
Phosphorus, total [as P]	0	7

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES SD0030996.

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 SD0030996.

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 SD0030996 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES SD0030996 for the STANDING ROCK WATER TREATMENT PLANT in Wakpala, SD, which is administratively continued and classed as a Minor discharger. The page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit recorded as issued September 19, 2011 and expiring September 30, 2016.