Clean Water Act discharge permit · NPDES SDG589119

TIMBER LAKE WASTEWATER TREATMENT FACILITY, Timber Lake, SD: NPDES SDG589119 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
0Pollutants with an effluent exceedance

TIMBER LAKE WASTEWATER TREATMENT FACILITY, held by Timber Lake, City of, holds NPDES permit SDG589119. EPA’s file records it issued April 25, 2016 and expiring December 31, 2020. 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	TIMBER LAKE WASTEWATER TREATMENT FACILITY
Permittee as filed	Timber Lake, City of
NPDES ID	SDG589119
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	April 25, 2016
Expiration date	December 31, 2020
Issuing agency	U.S. EPA Region 8
Address	Timber Lake, SD 57656
Subwatershed	Upper Dog Butte Creek (HUC 101303061201)
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

14Pollutants on file
10Under a numeric limit
14With 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
BOD, 5-day, 20 deg. C	6	39
Solids, total suspended	6	39
pH	6	32
Temperature, water deg. centigrade	6	25
Nitrogen, ammonia total [as N]	6	25
Flow, total	6	18
Oil & Grease	3	16
Oil and grease visual	3	16
Flow, in conduit or thru treatment plant	0	14
Nitrogen, total [as N]	3	9
Phosphorus, total [as P]	3	9
Oxygen, dissolved [DO]	0	7
E. coli	0	7
Duration of discharge	0	7

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES SDG589119.

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 SDG589119.

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.

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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 SDG589119 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 SDG589119 for the Timber Lake Wastewater Treatment Facility in Timber Lake, SD, held by Timber Lake, City of, and shows an administratively continued status with a minor discharger class. The listed figures are 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.