Milan WWTP
75 Gump Lake Road, Milan, MI 48160 · Washtenaw County · Publicly Owned Treatment Works
- Average flow
- 1.06 MGD
- Design flow
- —
- NPDES permit
- MI0021571
- Effective
- Permit expires
- October 2029
- Population served
- 4,867
- CWNS 2022
Milan WWTP is a publicly owned wastewater treatment works in Milan, Washtenaw County, Michigan treating an average of 1.06 million gallons per day, serving about 4,867 residents. It discharges under NPDES permit MI0021571 (effective), which expires in October 2029, with 47 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Milan WWTP.
Available with a free Klarifi account
See the full treatment train at Milan WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 47
- Effluent violations
- 23
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 Milan WWTP, from the plant's pretreatment programme records.
- Industrial users
- 2
- 1 categorical
- Sampled for PFAS
- 2
- 2023–2024
- Above 12 ng/L PFOS
- 0
- highest 0.1 ng/L
On record: Georgia Pacific (Milan), 0.1 ng/L; B.O.P. Federal Correctional Institute (Milan). Most users are in hospitals and public institutions and paper and packaging.
Industrial users of Milan WWTP →PFAS sources at all Michigan plants →
Unlock the details behind these industrial users
Discharge flow, federal category, full PFAS sampling history, source documents and contacts for every industrial user of Milan WWTP. Free with a Klarifi account.
Key contacts
13 verified contacts for Milan WWTP, with validated emails and direct phone numbers.
Unlock 13 verified contacts (10 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Milan WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Saline · 8 mi away
1.33 MGD
Britton · 9 mi away
1.4 MGD
Maybee · 10 mi away
1.1 MGD
Ypsilanti · 12 mi away
23.69 MGD
Saline · 12 mi away
0.01 MGD
Petersburg · 12 mi away
0.1 MGD
Ann Arbor · 13 mi away
14.38 MGD
Ida · 13 mi away
1.75 MGD
Milan 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 February 27, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms