OSKALOOSA SW STP

Address

2632 KENT AVENUE
OSKALOOSA, IA 52577
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County

MAHASKA County

Industry

Utilities

NAICS (North American Industry Classification)

221320

Inspections

5 · last Apr 15, 2025

Total Penalties

$0

Registry ID

110039989457

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.

0

Air (CAA)
Qtrs Non-Compliant

12

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	Schedule Event reported late	Apr 1, 2024	—	Open
cwa	Schedule Event unachieved and not reported	Apr 1, 2024	May 24, 2024	Resolved
cwa	Schedule Event achieved late but reported	Apr 1, 2024	—	Open
cwa	Schedule Event unachieved but reported	Apr 1, 2024	May 24, 2024	Resolved
cwa	Schedule Event achieved late but reported	Apr 1, 2023	—	Open
cwa	Schedule Event achieved late but reported	Apr 1, 2022	—	Open
cwa	Schedule Event achieved late but reported	Aug 1, 2018	—	Open
cwa	Schedule Event unachieved but reported	Dec 1, 2017	Jan 1, 2018	Resolved
cwa	Schedule Event unachieved but reported	Apr 1, 2017	May 2, 2017	Resolved
cwa	Schedule Event unachieved but reported	Feb 1, 2017	Mar 4, 2017	Resolved
cwa	Schedule Event unachieved but reported	Feb 1, 2016	May 2, 2016	Resolved
cwa	Schedule Event achieved late but reported	Oct 1, 1994	—	Open
cwa	Schedule Event unachieved and not reported	Oct 1, 1994	Jan 23, 1995	Resolved
cwa	Schedule Event unachieved and not reported	Oct 1, 1991	Feb 5, 1992	Resolved
cwa	Schedule Event achieved late but reported	Oct 1, 1991	—	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
Chlorine, total residual	DMR, Limited - Numeric Violation	0.05 mg/L	0.50	+90%	May 2025	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	5.47 mg/L	4.00	+37%	Feb 2025	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	4.50 mg/L	2.50	+80%	Dec 2024	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	2.40 mg/L	2.30	+4%	Nov 2024	Open
Solids, total suspended	DMR, Limited - Numeric Violation	46.00 mg/L	45.00	+2%	Oct 2024	Open
Solids, total suspended	DMR, Limited - Numeric Violation	37.30 mg/L	30.00	+24%	Nov 2021	Open
Solids, total suspended	DMR, Limited - Numeric Violation	73.70 mg/L	45.00	+64%	Nov 2021	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	15.90 mg/L	12.00	+33%	Mar 2018	Open
BOD, carbonaceous [5 day, 20 C]	DMR, Limited - Numeric Violation	51.85 mg/L	40.00	+30%	Sep 2017	Open
Solids, total suspended	DMR, Limited - Numeric Violation	48.30 mg/L	45.00	+7%	Sep 2017	Open
BOD, carbonaceous [5 day, 20 C]	DMR, Limited - Numeric Violation	27.34 mg/L	25.00	+9%	Sep 2017	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	8.07 mg/L	5.80	+39%	Sep 2017	Open
Solids, total suspended	DMR, Limited - Numeric Violation	32.78 mg/L	30.00	+9%	Sep 2017	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	2.41 mg/L	1.50	+61%	Sep 2017	Open
Chlorine, total residual	DMR, Limited - Numeric Violation	0.13 mg/L	0.50	+74%	Jul 2017	Open
BOD, carbonaceous [5 day, 20 C]	DMR, Limited - Numeric Violation	47.40 mg/L	40.00	+19%	Dec 2016	Open
BOD, carbonaceous [5 day, 20 C]	DMR, Limited - Numeric Violation	27.36 mg/L	25.00	+9%	Dec 2016	Open
Solids, total suspended	DMR, Limited - Numeric Violation	49.50 mg/L	45.00	+10%	Dec 2016	Open
Solids, total suspended	DMR, Limited - Numeric Violation	45.06 mg/L	30.00	+50%	Nov 2016	Open
BOD, carbonaceous [5 day, 20 C]	DMR, Limited - Numeric Violation	53.35 mg/L	40.00	+33%	Nov 2016	Open
BOD, carbonaceous [5 day, 20 C]	DMR, Limited - Numeric Violation	30.79 mg/L	25.00	+23%	Nov 2016	Open
Solids, total suspended	DMR, Limited - Numeric Violation	81.70 mg/L	45.00	+82%	Nov 2016	Open
Chlorine, total residual	DMR, Limited - Numeric Violation	1.00 mg/L	0.50	+100%	Aug 2016	Resolved
Chlorine, total residual	DMR, Limited - Numeric Violation	1.00 mg/L	0.50	+100%	Jul 2016	Resolved
Chlorine, total residual	DMR, Limited - Numeric Violation	0.40 mg/L	0.50	+20%	Jul 2016	Open
Chlorine, total residual	DMR, Limited - Numeric Violation	1.00 mg/L	0.50	+100%	Jun 2016	Resolved
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	9.42 mg/L	8.80	+7%	May 2016	Open
Chlorine, total residual	DMR, Limited - Numeric Violation	1.20 mg/L	0.50	+140%	May 2016	Resolved
Chlorine, total residual	DMR, Limited - Numeric Violation	1.00 mg/L	0.50	+100%	Apr 2016	Resolved

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.

State CWA Non Penalty AO

Clean Water Act · Case IA-3663 · Apr 26, 1994

State CWA Non Penalty AO

Clean Water Act · Case IA-N00000125 · Apr 26, 1994

State CWA Non Penalty AO

Clean Water Act · Case IA-N3663 · Apr 26, 1994

State CWA Non Penalty AO

Clean Water Act · Case IA-3664 · Apr 18, 1991

State CWA Non Penalty AO

Clean Water Act · Case IA-N00001679 · Apr 18, 1991

State CWA Non Penalty AO

Clean Water Act · Case IA-N3664 · Apr 18, 1991

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