City Of Portland 2021 Gravity Sewer Interceptor
122 Morningside Drive, Portland, TN 37148 · Sumner County · Publicly Owned Treatment Works
- Average flow
- 1.18 MGD
- Design flow
- 2.85 MGD
- NPDES permit
- TN0021865
- Effective
- Permit expires
- August 2029
- Population served
- 13,088
- CWNS 2022
City Of Portland 2021 Gravity Sewer Interceptor is a publicly owned wastewater treatment works in Portland, Sumner County, Tennessee treating an average of 1.18 million gallons per day against a permitted design capacity of 2.85 MGD, serving about 13,088 residents. It discharges under NPDES permit TN0021865 (effective), which expires in August 2029, with 217 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in September 2026.
Treatment technology
Treatment structures and unit processes at City Of Portland 2021 Gravity Sewer Interceptor.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 217
- Effluent violations
- 197
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for City Of Portland 2021 Gravity Sewer Interceptor in EPA's ICIS system.
- Formal actions
- 3
- 1 since FY2020
- Penalties assessed
- $8,000
- all cases
- Compliance actions
- $20M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Sep 2026
THE CITY OF PORTLAND, TENNESSEE
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $20M
EPA's description of the case:
“SEPTEMBER 18, 2026 - ADMINISTRATIVE ORDER ON CONSENT This Administrative Order on Consent (Order) is issued pursuant to the authority vested in the Administrator of the EPA by Section 309(a) of the…”
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Source: EPA ECHO, civil enforcement case 04-2026-1000.
Full case history with a free Klarifi account
Every action against City Of Portland 2021 Gravity Sewer Interceptor with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
5 verified contacts for City Of Portland 2021 Gravity Sewer Interceptor, with validated emails and direct phone numbers.
Unlock 5 verified contacts (2 more than shown)
Names, validated emails and direct phone numbers for decision-makers at City Of Portland 2021 Gravity Sewer Interceptor, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Tennessee
Westmoreland · 16 mi away
0.13 MGD
Gallatin · 18 mi away
0.0013 MGD
Gallatin · 19 mi away
0.02 MGD
Westmoreland · 20 mi away
0.0023 MGD
Madison · 23 mi away
16.24 MGD
Hartsville · 24 mi away
0.46 MGD
Lafayette · 29 mi away
0.6 MGD
Nashville · 31 mi away
103.22 MGD
City Of Portland 2021 Gravity Sewer Interceptor: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated September 11, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms