Marysville WWTP
980 E Huron Blvd, Marysville, MI 48040 · St. Clair County · Publicly Owned Treatment Works
- Average flow
- 2.04 MGD
- Design flow
- —
- NPDES permit
- MI0020656
- Effective
- Permit expires
- October 2028
- Population served
- 10,445
- CWNS 2022
Marysville WWTP is a publicly owned wastewater treatment works in Marysville, St. Clair County, Michigan treating an average of 2.04 million gallons per day, serving about 10,445 residents. It discharges under NPDES permit MI0020656 (effective), which expires in October 2028, with 1 recorded violation in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Marysville WWTP.
Available with a free Klarifi account
See the full treatment train at Marysville WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
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 Marysville WWTP, from the plant's pretreatment programme records.
- Industrial users
- 5
- 3 categorical
- Sampled for PFAS
- 4
- 2023
- Above 12 ng/L PFOS
- 0
- highest 7.2 ng/L
Among them: FCA Sl1/sl2 (Marysville), 7.2 ng/L; Mueller Impacts Co (Marysville), 2.2 ng/L; Marysville Ethanol (Marysville). Most users are in automotive, metal and equipment manufacturing and other industries.
Industrial users of Marysville WWTP →PFAS sources at all Michigan plants →
Unlock all 5 industrial users of this plant
Discharge flow, federal category, full PFAS sampling history, source documents and contacts for every industrial user of Marysville WWTP. Free with a Klarifi account.
Key contacts
12 verified contacts for Marysville WWTP, with validated emails and direct phone numbers.
Unlock 12 verified contacts (9 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Marysville WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Port Huron · 5 mi away
7.93 MGD
St Clair · 6 mi away
0.99 MGD
East China · 10 mi away
0.45 MGD
Marine City · 14 mi away
1.11 MGD
Memphis · 15 mi away
—
Emmett · 16 mi away
0.68 MGD
Algonac · 20 mi away
1.66 MGD
New Baltimore · 21 mi away
1.05 MGD
Marysville 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 March 3, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms