City Of Port Huron Wastewater Treatment Plant
100 Merchant Street, Port Huron, MI 48060 · Saint Clair County · Publicly Owned Treatment Works
- Average flow
- 7.93 MGD
- Design flow
- —
- NPDES permit
- MI0023833
- Effective
- Permit expires
- October 2027
- Population served
- 49,807
- CWNS 2022
City Of Port Huron Wastewater Treatment Plant is a publicly owned wastewater treatment works in Port Huron, Saint Clair County, Michigan treating an average of 7.93 million gallons per day, serving about 49,807 residents. It discharges under NPDES permit MI0023833 (effective), which expires in October 2027, with 4 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at City Of Port Huron Wastewater Treatment Plant.
Available with a free Klarifi account
See the full treatment train at City Of Port Huron Wastewater Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for City Of Port Huron Wastewater Treatment Plant in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 1
- none on record
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against City Of Port Huron Wastewater Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Industrial users and pretreatment
Industries that discharge process wastewater to City Of Port Huron Wastewater Treatment Plant, from the plant's pretreatment programme records.
- Industrial users
- 6
- 3 categorical
- Sampled for PFAS
- 4
- 2023–2024
- Above 12 ng/L PFOS
- 3
- highest 2,900 ng/L
The highest PFOS samples came from Auto Anodics (Port Huron), 2,900 ng/L; St. Clair County Landfill (Smiths Creek), 510 ng/L; Michigan Metal Coatings (Port Huron), 370 ng/L. Most users are in metal finishing and plating and automotive, metal and equipment manufacturing.
Industrial users of City Of Port Huron Wastewater Treatment Plant →PFAS sources at all Michigan plants →
Unlock all 6 industrial users of this plant
Discharge flow, federal category, full PFAS sampling history, source documents and contacts for every industrial user of City Of Port Huron Wastewater Treatment Plant. Free with a Klarifi account.
Capital improvement projects in Port Huron
Port Huron's capital improvement plan lists 94 water, sewer and wastewater line items worth $71M starting 2024–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Port Huron →
| Project | Budget | Years |
|---|---|---|
| Replace Odor Control System (Construction) | $8,000,000 | 2025–2026 |
| Blue Water Bridge South Area | $4,200,000 | 2028–2030 |
| Rehabilitation of Primary Tanks (8 Each) | $3,400,000 | 2024–2025 |
| Hospital Area Road and Utility Improvements - Phase 2 | $2,850,000 | 2028–2029 |
| Blue Water Bridge South Area | $2,640,000 | 2028–2030 |
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
17 verified contacts for City Of Port Huron Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 17 verified contacts (14 more than shown)
Names, validated emails and direct phone numbers for decision-makers at City Of Port Huron Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Michigan
Marysville · 5 mi away
2.04 MGD
St Clair · 11 mi away
0.99 MGD
East China · 15 mi away
0.45 MGD
Emmett · 17 mi away
0.68 MGD
Memphis · 18 mi away
—
Marine City · 19 mi away
1.11 MGD
Lexington · 21 mi away
1.18 MGD
Yale · 22 mi away
—
City Of Port Huron Wastewater Treatment Plant: 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 April 4, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms