Non-Compliance Clean Air Act Clean Water Act RCRA

NAMPA 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: 340 W RAILROAD ST
NAMPA, ID 83687
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County: CANYON County
Industry: Utilities
NAICS (North American Industry Classification): 221320
Inspections: 6 · last Sep 10, 2025
Total Penalties: $0 · last Oct 12, 2017
Registry ID: 110010026890

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

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	WW SSO - Overflow to Dry Land or Building Backup	Mar 16, 2026	Mar 16, 2026	Resolved
cwa	Schedule Event unachieved but reported	Nov 1, 2025	Dec 2, 2025	Resolved
cwa	WW SSO - Overflow to Dry Land or Building Backup	Aug 6, 2025	Aug 12, 2025	Resolved
cwa	WW SSO - Overflow to Dry Land or Building Backup	Jan 19, 2025	Jan 19, 2025	Resolved
cwa	Monitoring Violations - Improper Analysis or Lab Error	Jun 9, 2024	Jun 9, 2024	Resolved
cwa	Monitoring Violations - Improper Analysis or Lab Error	Dec 20, 2023	Dec 20, 2023	Resolved
cwa	Monitoring Violations - Invalid/Unrepresentative Sample	Jul 20, 2023	—	Open
cwa	Permit Violations - Violation Specified in Comment	Jun 8, 2021	Jun 17, 2021	Resolved
cwa	Monitoring Violations - Invalid/Unrepresentative Sample	Jun 8, 2021	Jun 17, 2021	Resolved
cwa	Monitoring Violations - Frequency of Sampling Violation	Apr 6, 2020	—	Open
cwa	Pretreatment - Failure to Meet Inspection and Sampling Plan for SIUs	Oct 1, 2019	—	Open
cwa	Effluent Violations - Unauthorized Discharge	Aug 21, 2019	Oct 24, 2019	Resolved
cwa	Monitoring Violations - Improper Analysis or Lab Error	Aug 21, 2019	Oct 18, 2019	Resolved
cwa	Monitoring Violations - Invalid/Unrepresentative Sample	Aug 21, 2019	Oct 18, 2019	Resolved
cwa	WW SSO - Discharge to Waters	Aug 13, 2019	Aug 14, 2019	Resolved
rcra	Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators	Apr 1, 2005	Apr 21, 2005	Resolved

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
Phosphorus, total [as P]	DMR, Limited - Numeric Violation	0.51 mg/L	0.50	+2%	Aug 2022	Open
E. coli, MTEC-MF	DMR, Limited - Numeric Violation	2,419.60 MPN/100mL	576.00	+320%	Dec 2020	Open
E. coli, MTEC-MF	DMR, Limited - Numeric Violation	2,419.60 MPN/100mL	576.00	+99,999%	Jul 2020	Open
Chlorine, total residual	DMR, Limited - Numeric Violation	0.05 mg/L	0.05	+2%	May 2020	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	491.68 kg/d	335.51	+47%	May 2020	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	12.90 mg/L	4.92	+162%	May 2020	Open
E. coli, MTEC-MF	DMR, Limited - Numeric Violation	613.10 MPN/100mL	576.00	+6%	Mar 2019	Open
E. coli, MTEC-MF	DMR, Limited - Numeric Violation	866.40 MPN/100mL	576.00	+50%	Nov 2017	Open
E. coli, MTEC-MF	DMR, Limited - Numeric Violation	1,413.60 MPN/100mL	576.00	+145%	Jul 2017	Open
E. coli, MTEC-MF	DMR, Limited - Numeric Violation	648.80 MPN/100mL	576.00	+13%	Jun 2017	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.

State CWA Non Penalty AO

Clean Water Act · Case ID-2024-0005 · Apr 23, 2024

VERBAL INFORMAL

RCRA (Hazardous Waste) · Case RCRA-IDD980739007-001 · Apr 4, 2005