City Of Mandeville
500 Mandeville High Boulevard, Mandeville, LA 70448 · Saint Tammany County · Publicly Owned Treatment Works
- Average flow
- 1.64 MGD
- Design flow
- —
- NPDES permit
- LAL038288
- Effective
- Permit expires
- December 2030
- Population served
- 12,095
- CWNS 2022
City Of Mandeville is a publicly owned wastewater treatment plant in Mandeville, Saint Tammany County, Louisiana treating an average of 1.64 million gallons per day, serving about 12,095 residents. It discharges under NPDES permit LAL038288 (effective), which expires in December 2030, with 22 recorded violations in the last three years. EPA has recorded 4 formal enforcement actions naming the plant, the latest in July 2022.
Treatment technology
2 treatment structures and unit processes identified at City Of Mandeville.
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See the full treatment train at City Of Mandeville: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 22
- Effluent violations
- 17
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 Mandeville in EPA's ICIS system.
- Formal actions
- 4
- 1 since FY2020
- Penalties assessed
- $130,800
- all cases
- Compliance actions
- $2,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jul 2022
CITY OF MANDEVILLE PWS
Administrative order · SDWA, National Drinking Water Regulations · Final Order No Penalty · Compliance actions $2,000
EPA's description of the case:
“EPA Region 6 issued an Administrative Order (AO) to the City of Mandeville, Louisiana. The Administrative Order was issued in response to violations of Section 1433(a) of the SDWA. The America Water…”
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Source: EPA ECHO, civil enforcement case 06-2022-1202.
Full case history with a free Klarifi account
Every action against City Of Mandeville with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
7 verified contacts for City Of Mandeville, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at City Of Mandeville, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Louisiana
Mandeville · 1 mi away
0.24 MGD
Covington · 3 mi away
0.17 MGD
Mandeville · 3 mi away
0.45 MGD
Madisonville · 3 mi away
0.2 MGD
Covington · 3 mi away
0.16 MGD
Madisonville · 4 mi away
0.13 MGD
Mandeville · 5 mi away
0.59 MGD
Mandeville · 5 mi away
0.05 MGD
City Of Mandeville: 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 March 9, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms