Non-Compliance Clean Air Act Clean Water Act RCRA

MASON WWTP

Quick Summary

•Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
•Assessed $0 in total penalties since records began.

Address: 2950 BIRCH DR
MASON CITY, IA 50401
View on map ↗
County: CERRO GORDO County
Industry: Utilities
NAICS (North American Industry Classification): 221320
Inspections: 6 · last Dec 18, 2024
Total Penalties: $0
Registry ID: 110012753225

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.

Air (CAA)
Qtrs Non-Compliant

Water (CWA)
Qtrs Non-Compliant

Hazardous Waste (RCRA)
Qtrs Non-Compliant

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
Nitrogen, total [as N]	DMR, Limited - Numeric Violation	455.52 kg/d	424.40	+7%	Jul 2025	Open
Nitrogen, total [as N]	DMR, Limited - Numeric Violation	451.07 kg/d	424.40	+6%	Jun 2025	Open
Nitrogen, total [as N]	DMR, Limited - Numeric Violation	436.72 kg/d	424.40	+3%	Aug 2024	Open
Nitrogen, total [as N]	DMR, Limited - Numeric Violation	708.83 kg/d	694.67	+2%	Aug 2024	Open
Nitrogen, total [as N]	DMR, Limited - Numeric Violation	508.29 kg/d	424.40	+20%	May 2024	Open
Nitrogen, total [as N]	DMR, Limited - Numeric Violation	716.60 kg/d	694.67	+3%	May 2024	Open
Oxygen, dissolved [DO]	DMR, Limited - Numeric Violation	4.77 mg/L	5.00	+5%	Jun 2022	Open
Solids, total suspended	DMR, Limited - Numeric Violation	78.50 mg/L	45.00	+74%	Apr 2022	Open
Solids, total suspended	DMR, Limited - Numeric Violation	93.00 mg/L	45.00	+107%	May 2021	Open
Solids, total suspended	DMR, Limited - Numeric Violation	111.08 mg/L	45.00	+147%	Feb 2021	Open
Solids, total suspended	DMR, Limited - Numeric Violation	4,880.54 kg/d	2,538.77	+92%	Mar 2019	Open
Solids, total suspended	DMR, Limited - Numeric Violation	103.00 mg/L	45.00	+129%	Dec 2018	Open
Oxygen, dissolved [DO]	DMR, Limited - Numeric Violation	3.20 mg/L	5.00	+36%	Jun 2018	Open
Toxicity [acute], Ceriodaphnia dubia	DMR, Limited - Numeric Violation	12.00 pass=0;fail=1	1.00	+1,100%	Sep 2017	Open
Toxicity [acute], Pimephales promelas [Fathead Minnow]	DMR, Limited - Numeric Violation	12.00 pass=0;fail=1	1.00	+1,100%	Sep 2017	Open
Mercury, total [as Hg]	DMR, Limited - Numeric Violation	0.00 mg/L	0.00	+6%	May 2017	Open
Solids, total suspended	DMR, Limited - Numeric Violation	63.60 mg/L	45.00	+41%	Feb 2017	Open
Chromium, hexavalent [as Cr]	DMR, Limited - Numeric Violation	0.10 mg/L	0.02	+492%	Aug 2016	Open
Chromium, hexavalent [as Cr]	DMR, Limited - Numeric Violation	2.44 kg/d	0.91	+169%	Aug 2016	Open
Chromium, hexavalent [as Cr]	DMR, Limited - Numeric Violation	0.10 mg/L	0.02	+492%	Jul 2016	Open
Chromium, hexavalent [as Cr]	DMR, Limited - Numeric Violation	2.62 kg/d	0.91	+188%	Jul 2016	Open
Mercury, total [as Hg]	DMR, Limited - Numeric Violation	0.00 mg/L	0.00	+50%	Jun 2016	Resolved
Mercury, total [as Hg]	DMR, Limited - Numeric Violation	0.00 mg/L	0.00	+50%	May 2016	Resolved

Other facilities in CERRO GORDO County, IA

KRAFT FOODS GLOBAL INC - MASON CITY

MASON CITY, IA · Manufacturing

MACH III INC

MASON CITY, IA

LANDFILL OF NORTH IOWA

CLEAR LAKE, IA · Administrative and Support and Waste Management

CLEAR LAKE WATER DEPARTMENT-PLANT #1

CLEAR LAKE, IA

T & S GENERAL HAULING AND CLEAN UP

MASON CITY, IA

HEIDELBERG MATERIALS US CEMENT LLC-PLANT #1

MASON CITY, IA

All facilities in IA →