Ludington WWTP
5160 W 6th St, Ludington, MI 49431 · Mason County · Publicly Owned Treatment Works
- Average flow
- 2.01 MGD
- Design flow
- —
- NPDES permit
- MI0021334
- Administratively continued
- Permit expires
- October 2025
- Population served
- 8,809
- CWNS 2022
Ludington WWTP is a publicly owned wastewater treatment works in Ludington, Mason County, Michigan treating an average of 2.01 million gallons per day, serving about 8,809 residents. It discharges under NPDES permit MI0021334 (administratively continued), which expires in October 2025, with 30 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Ludington WWTP.
Available with a free Klarifi account
See the full treatment train at Ludington WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 30
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Industrial users and pretreatment
Industries that discharge process wastewater to Ludington WWTP, from the plant's pretreatment programme records.
- Industrial users
- 8
- on record
- Sampled for PFAS
- 2
- 2023–2024
- Above 12 ng/L PFOS
- 2
- highest 191 ng/L
The highest PFOS samples came from Manistee County Landfill (Republic) (Manistee), 191 ng/L; Mason County Landfill (Scottville), 60 ng/L; Great Lakes Castings Llc (Ludington). Most users are in automotive, metal and equipment manufacturing and landfills and waste management.
Industrial users of Ludington WWTP →PFAS sources at all Michigan plants →
Unlock all 8 industrial users of this plant
Discharge flow, federal category, full PFAS sampling history, source documents and contacts for every industrial user of Ludington WWTP. Free with a Klarifi account.
Key contacts
3 verified contacts for Ludington WWTP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Ludington WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Custer · 10 mi away
0.63 MGD
Hart · 18 mi away
—
Whitehall · 37 mi away
0.06 MGD
Reed City · 45 mi away
0.51 MGD
Newaygo · 48 mi away
0.53 MGD
Frankfort · 48 mi away
0.3 MGD
Grant · 52 mi away
0.08 MGD
Cadillac · 55 mi away
1.99 MGD
Ludington WWTP: 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 January 27, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms