Southern Clinton Co WWTP
3671 Herbison Rd, De Witt, MI 48820 · Clinton County · Publicly Owned Treatment Works
- Average flow
- 2.5 MGD
- Design flow
- —
- NPDES permit
- MI0021008
- Effective
- Permit expires
- October 2027
- Population served
- 18,035
- CWNS 2022
Southern Clinton Co WWTP is a publicly owned wastewater treatment works in De Witt, Clinton County, Michigan treating an average of 2.5 million gallons per day, serving about 18,035 residents. It discharges under NPDES permit MI0021008 (effective), which expires in October 2027, with 30 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Southern Clinton Co WWTP.
Available with a free Klarifi account
See the full treatment train at Southern Clinton Co WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 30
- Effluent violations
- 3
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 Southern Clinton Co WWTP, from the plant's pretreatment programme records.
- Industrial users
- 2
- on record
- Sampled for PFAS
- 1
- 2023–2024
- Above 12 ng/L PFOS
- 1
- highest 230 ng/L
The highest PFOS samples came from Grand River Landfill (Granger) (Brighton), 230 ng/L; John Henry Company (Lansing). Most users are in landfills and waste management and other industries.
Industrial users of Southern Clinton Co 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 Southern Clinton Co WWTP. Free with a Klarifi account.
Key contacts
4 verified contacts for Southern Clinton Co WWTP, with validated emails and direct phone numbers.
Unlock 4 verified contacts (1 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Southern Clinton Co WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Lansing · 5 mi away
13.64 MGD
Lansing · 6 mi away
4.67 MGD
East Lansing · 8 mi away
11.19 MGD
Grand Ledge · 9 mi away
5.17 MGD
Dimondale · 12 mi away
0.21 MGD
Holt · 14 mi away
2.47 MGD
Fowler · 14 mi away
—
Potterville · 16 mi away
1.58 MGD
Southern Clinton 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 October 26, 2026; facility record last updated July 25, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms