Owosso/mid Shiawassee Co WWTP
Owosso, MI · Shiawassee County · Publicly Owned Treatment Works
- Average flow
- 2.09 MGD
- Design flow
- —
- NPDES permit
- MI0023752
- Effective
- Permit expires
- October 2026
- Population served
- 23,957
- CWNS 2022
Owosso/mid Shiawassee Co WWTP is a publicly owned wastewater treatment works in Owosso, Shiawassee County, Michigan treating an average of 2.09 million gallons per day, serving about 23,957 residents. Treatment on site includes clarifiers, biogas balloons. It discharges under NPDES permit MI0023752 (effective), which expires in October 2026, with 29 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 29
- Effluent violations
- 12
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Owosso
Owosso's capital improvement plan lists 57 water, sewer and wastewater line items worth $64M starting 2024–2030. The largest budgeted items are shown here.
All water and sewer capital projects in Owosso →
| Project | Budget | Years |
|---|---|---|
| WTP Reservoir Design/Rehab/Replacement | $20,000,000 | 2029–2029 |
| Lime Residuals Mechanical Dewatering | $15,000,000 | 2030–2030 |
| Water Service Line Replacement Project | $8,700,000 | 2025–2030 |
| Sanitary Sewer Rehab - Open Cut | $2,400,000 | 2025–2030 |
| Sanitary Sewer River Crossing at M-52 Bridge | $1,550,000 | 2025–2029 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
1 verified contact for Owosso/mid Shiawassee Co WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Owosso/mid Shiawassee Co WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Oakley · 9 mi away
—
Ovid · 10 mi away
—
Vernon · 10 mi away
—
Durand · 11 mi away
0.33 MGD
Elsie · 12 mi away
—
Chesaning · 13 mi away
0.25 MGD
Perry · 14 mi away
—
Flushing · 16 mi away
0.66 MGD
Owosso/mid Shiawassee Co 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 September 11, 2026; facility record last updated March 6, 2025.