Clean Water Act discharge permit · NPDES IA0073750

SAC AND FOX SETTLEMENT LAGOON, Tama, IA: NPDES IA0073750 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
18Pollutants under a numeric limit
7Pollutants with an effluent exceedance

SAC AND FOX SETTLEMENT LAGOON, held by Sac and Fox Tribe of the Mississippi in Iowa, holds NPDES permit IA0073750, which discharges to Onion Creek To A Side Channel Of The Iowa River. EPA’s file records it issued March 30, 2018 and expiring April 1, 2023. 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	SAC AND FOX SETTLEMENT LAGOON
Permittee as filed	Sac and Fox Tribe of the Mississippi in Iowa
NPDES ID	IA0073750
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 30, 2018
Expiration date	April 1, 2023
Address	Tama, IA 52339
Receiving water	Onion Creek to a side channel of the Iowa River
Subwatershed	Bennett Creek-Iowa River (HUC 070802080407)

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

Effluent limits and exceedances

23Pollutants on file
18Under a numeric limit
23With a violation of any kind
7With 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	7	389	27	September 30, 2025	2,489% over the limit
Nitrogen, ammonia total [as N]	16	330	26	February 28, 2025	903% over the limit
Solids, suspended percent removal	1	64	13	June 30, 2026	560% over the limit
E. coli, colony forming units [CFU]	2	86	7	March 31, 2025	269% over the limit
BOD, 5-day, 20 deg. C	7	362	5	September 30, 2017	287% over the limit
BOD, 5-day, percent removal	2	103	4	January 1, 2020	560% over the limit
Chlorine, total residual	4	197	1	November 1, 2022	23,277% over the limit
pH	6	298	0
Flow, in conduit or thru treatment plant	4	209	0
Solids, total dissolved [TDS]	4	193	0
Phosphorus, total [as P]	3	157	0
Nitrogen, total [as N]	3	155	0
Oxygen, dissolved [DO]	2	99	0
Temperature, water deg. fahrenheit	2	94	0
Iron, total [as Fe]	1	49	0
Manganese, total [as Mn]	1	49	0
Duration of discharge	1	45	0
Flow, total	1	45	0
Chloride [as Cl]	0	13	0
Sulfate, total [as SO4]	0	13	0
Solids, total dissolved [inorganic]	0	3	0
Nitrogen, Kjeldahl, total [as N]	0	2	0
Nitrite + Nitrate total [as N]	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 IA0073750.

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 IA0073750 there.

Nearby on the register

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

This public-records page covers NPDES permit IA0073750 for the Sac and Fox Settlement Lagoon in Tama, IA, held by the Sac and Fox Tribe of the Mississippi in Iowa, with the permit listed as administratively continued and a minor discharger class. The page lists 7 pollutants under a numeric limit and 7 pollutants with an effluent exceedance, and the discharge is to Onion Creek to a side channel of the Iowa River in the Bennett Creek-Iowa River subwatershed (HUC 070802080407).