IOWA STATE UNIVERSITY/ ISU HEATING PLANT

Address

WALLACE ROAD
AMES, IA 50011
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County

STORY County

Industry

Educational Services

NAICS (North American Industry Classification)

611310

Inspections

4 · last Sep 16, 2025

Total Penalties

$0 · last Dec 29, 2005

Registry ID

110022692111

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

3

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
caa	Linked to Viol. Below	—	—	Open
caa	Linked to Viol. Below	—	—	Open
caa	Linked to Viol. Below	—	—	Open
caa	FRV	Mar 8, 2023	—	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
Sulfate, total [as SO4]	DMR, Limited - Numeric Violation	1,990.00 mg/L	1,514.00	+31%	Dec 2025	Open
Chloride [as Cl]	DMR, Limited - Numeric Violation	463.00 mg/L	389.00	+19%	Dec 2025	Resolved
Chloride [as Cl]	DMR, Limited - Numeric Violation	438.00 mg/L	389.00	+13%	Nov 2025	Resolved
Chloride [as Cl]	DMR, Limited - Numeric Violation	405.00 mg/L	389.00	+4%	Oct 2025	Resolved
Chloride [as Cl]	DMR, Limited - Numeric Violation	412.00 mg/L	389.00	+6%	Sep 2025	Resolved
Chloride [as Cl]	DMR, Limited - Numeric Violation	514.00 mg/L	389.00	+32%	Aug 2025	Resolved
Temperature, water deg. fahrenheit	DMR, Limited - Numeric Violation	95.30 deg F	89.60	+6%	Aug 2020	Open
Temperature, water deg. fahrenheit	DMR, Limited - Numeric Violation	92.40 deg F	89.60	+3%	Jul 2020	Open
Temperature, water deg. fahrenheit	DMR, Limited - Numeric Violation	92.60 deg F	89.60	+3%	Jul 2019	Open
Temperature, water deg. fahrenheit	DMR, Limited - Numeric Violation	90.50 deg F	89.60	+1%	Jun 2019	Open
Temp. diff. between intake and discharge	DMR, Limited - Numeric Violation	6.10 deg F	5.40	+13%	Aug 2017	Open
Temp. diff. between intake and discharge	DMR, Limited - Numeric Violation	5.90 deg F	5.40	+9%	Jul 2016	Open
Temperature, water deg. fahrenheit	DMR, Limited - Numeric Violation	90.80 deg F	89.60	+1%	Jul 2016	Open
Temp. diff. between intake and discharge	DMR, Limited - Numeric Violation	6.10 deg F	5.40	+13%	Feb 2016	Open
Iron, total [as Fe]	DMR, Limited - Numeric Violation	1.08 mg/L	1.00	+8%	Jan 2016	Open
Iron, total [as Fe]	DMR, Limited - Numeric Violation	1.08 mg/L	1.00	+8%	Jan 2016	Open
Temp. diff. between intake and discharge	DMR, Limited - Numeric Violation	6.40 deg F	5.40	+19%	Sep 2015	Open
Temp. diff. between intake and discharge	DMR, Limited - Numeric Violation	5.60 deg F	5.40	+4%	Jul 2015	Open
Temp. diff. between intake and discharge	DMR, Limited - Numeric Violation	11.20 deg F	5.40	+107%	Apr 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.

Notice of Violation

Clean Air Act · Case 3603538708 · Mar 8, 2023

State CWA Penalty AO

Clean Water Act · Case IA-5946 · Dec 29, 2005

$1,500

State CWA Penalty AO

Clean Water Act · Case IA-N5946 · Dec 29, 2005

$1,500

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