Clean Water Act discharge permit · NPDES SD0020974

SINAI - CITY OF, Sinai, Town Of, SD: NPDES SD0020974 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
5Pollutants with an effluent exceedance

SINAI - CITY OF holds NPDES permit SD0020974, which discharges to Bolstad Slough. EPA’s file records it issued September 26, 2007 and expiring September 30, 2012. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	SINAI - CITY OF
Permittee as filed	SINAI - CITY OF
NPDES ID	SD0020974
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	September 26, 2007
Expiration date	September 30, 2012
Issuing agency	SDDENR
Address	Sinai, Town Of, SD 57061
Receiving water	BOLSTAD SLOUGH
Subwatershed	Molumby Slough (HUC 101702020806)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

13Pollutants on file
11Under a numeric limit
13With a violation of any kind
5With 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
Solids, total suspended	3	259	98	September 30, 2016	220% over the limit
BOD, 5-day, 20 deg. C	3	252	91	September 30, 2016	310% over the limit
Solids, suspended percent removal	1	113	58	August 31, 2016	567% over the limit
BOD, 5-day, percent removal	1	104	49	September 30, 2016	433% over the limit
pH	2	110	2	October 31, 2014
Flow rate	2	130	0
Temperature, water deg. centigrade	2	110	0
Nitrogen, ammonia total [as N]	2	110	0
Phosphorus, total [as P]	2	110	0
Duration of discharge	0	96	0
Coliform, fecal general	2	30	0
Flow, total	1	30	0
E. coli, colony forming units [CFU]	0	24	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 SD0020974.

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 SD0020974 there.

Nearby on the register

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

This public-records page covers NPDES permit SD0020974, held by SINAI - CITY OF for discharge to Bolstad Slough in the Molumby Slough subwatershed (HUC 101702020806). The permit is administratively continued, was issued September 26, 2007, and carries an expiration date of September 30, 2012. The file lists 13 pollutants on record, 11 under a numeric limit, and 5 with an effluent exceedance.