NORTH SIOUX CITY, CITY OF

Address

504 RIVER DRIVE
NORTH SIOUX CITY, SD 57049
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County

UNION County

Industry

Utilities

NAICS (North American Industry Classification)

221310

Inspections

2 · last May 28, 2025

Total Penalties

$0

Registry ID

110009791957

Compliance Status (Last 12 Quarters)

Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.

4

Water (CWA)
Qtrs Non-Compliant

Compliance Violations

Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.

Program	Type	Violation Date	Return to Compliance	Status
cwa	PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)]	Jun 29, 2024	—	Open
cwa	Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment	Jun 23, 2024	—	Open
cwa	Schedule Event achieved late but reported	Oct 1, 2005	—	Open
cwa	Schedule Event unachieved and not reported	Oct 1, 2005	Mar 24, 2006	Resolved
cwa	Effluent Violations - Unapproved Bypass	Sep 29, 2004	—	Open
cwa	Schedule Event achieved late but reported	Oct 1, 2003	—	Open
cwa	Schedule Event unachieved and not reported	Dec 28, 1993	May 12, 1997	Resolved
cwa	Schedule Event achieved late but reported	Dec 28, 1993	—	Open
cwa	Schedule Event achieved late but reported	Nov 28, 1993	—	Open
cwa	Schedule Event unachieved and not reported	Nov 28, 1993	May 12, 1997	Resolved
cwa	Schedule Event unachieved and not reported	Oct 28, 1993	May 12, 1997	Resolved
cwa	Schedule Event achieved late but reported	Oct 28, 1993	—	Open
cwa	Schedule Event unachieved and not reported	Sep 28, 1993	May 12, 1997	Resolved
cwa	Schedule Event achieved late but reported	Sep 28, 1993	—	Open
cwa	Schedule Event unachieved and not reported	Jan 28, 1993	May 12, 1997	Resolved
cwa	Schedule Event achieved late but reported	Jan 28, 1993	—	Open
cwa	Schedule Event unachieved and not reported	Dec 28, 1992	May 12, 1997	Resolved
cwa	Schedule Event achieved late but reported	Dec 28, 1992	—	Open
cwa	Schedule Event unachieved and not reported	Nov 1, 1992	May 12, 1997	Resolved
cwa	Schedule Event unachieved and not reported	Nov 1, 1992	May 12, 1997	Resolved
cwa	Schedule Event achieved late but reported	Nov 1, 1992	—	Open
cwa	Schedule Event achieved late but reported	Nov 1, 1992	—	Open
cwa	Schedule Event achieved late but reported	May 1, 1992	—	Open
cwa	Schedule Event achieved late but reported	Feb 1, 1992	—	Open
cwa	Schedule Event unachieved and not reported	Feb 1, 1992	May 12, 1997	Resolved
cwa	Schedule Event achieved late but reported	Jan 28, 1991	—	Open
cwa	Schedule Event achieved late but reported	Oct 19, 1990	—	Open

Discharge Limit Exceedances

Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.

Pollutant	Violation	Reported	Limit	Exceedance	Period	Status
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,550.00 MPN/100mL	1,178.00	+32%	Jul 2025	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,730.00 MPN/100mL	1,178.00	+47%	Jun 2025	Open
BOD, 5-day, 20 deg. C	DMR, Limited - Numeric Violation	86.00 mg/L	45.00	+91%	Nov 2023	Open
BOD, 5-day, 20 deg. C	DMR, Limited - Numeric Violation	57.00 mg/L	30.00	+90%	Nov 2023	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,730.00 MPN/100mL	1,178.00	+47%	Jul 2022	Open
Solids, total dissolved	DMR, Limited - Numeric Violation	1,674.00 mg/L	1,000.00	+67%	May 2022	Open
BOD, 5-day, 20 deg. C	DMR, Limited - Numeric Violation	55.00 mg/L	45.00	+22%	Feb 2022	Open
BOD, 5-day, 20 deg. C	DMR, Limited - Numeric Violation	40.70 mg/L	30.00	+36%	Feb 2022	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,990.00 MPN/100mL	1,178.00	+69%	Jul 2021	Open
Solids, total suspended	DMR, Limited - Numeric Violation	48.00 mg/L	45.00	+7%	Apr 2020	Open
Solids, total dissolved	DMR, Limited - Numeric Violation	1,216.00 mg/L	1,000.00	+22%	Jan 2020	Open
Chlorine, total residual	DMR, Limited - Numeric Violation	2.20 mg/L	0.02	+11,479%	Mar 2019	Open
Solids, total suspended	DMR, Limited - Numeric Violation	380.00 mg/L	90.00	+322%	Mar 2019	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,410.00 MPN/100mL	1,178.00	+20%	Jun 2018	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,200.00 MPN/100mL	1,178.00	+2%	May 2017	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,186.00 MPN/100mL	630.00	+88%	Jul 2016	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	10,500.00 MPN/100mL	1,178.00	+791%	Jul 2016	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,986.00 MPN/100mL	1,178.00	+69%	Aug 2015	Open
E. coli, colony forming units [CFU]	DMR, Limited - Numeric Violation	1,300.00 MPN/100mL	1,178.00	+10%	Jul 2015	Open
Solids, total suspended	DMR, Limited - Numeric Violation	50.00 mg/L	45.00	+11%	May 2015	Open

Enforcement Actions

Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.

CWA 309A AO For Compliance

Clean Water Act · Case 08-1992-N008 · Oct 17, 1991

CWA 309G2B AO For Class II Penalties

Clean Water Act · Case 08-1990-N009 · Feb 26, 1991

CWA 309A AO For Compliance

Clean Water Act · Case 08-1991-N010 · Oct 1, 1990

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