Marshall St. Advanced Pollution Control Facility
Clearwater, FL · Pinellas County · Publicly Owned Treatment Works
- Average flow
- 5.68 MGD
- Design flow
- 10 MGD
- NPDES permit
- FL0021857
- Effective
- Permit expires
- December 2027
- Population served
- 41,155
- CWNS 2022
Marshall St. Advanced Pollution Control Facility is a publicly owned wastewater treatment plant in Clearwater, Pinellas County, Florida treating an average of 5.68 million gallons per day against a permitted design capacity of 10 MGD, serving about 41,155 residents. Treatment on site includes clarifiers, biogas silos, biological treatment, other, disinfection, chlorine/ chloramine, screening. It discharges under NPDES permit FL0021857 (effective), which expires in December 2027, with 67 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Biogas silos
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Biological Treatment, Other
unit processDisinfection, chlorine/ chloramine
unit processScreening
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Compliance snapshot (last 3 years)
- Total violations
- 67
- Effluent violations
- 67
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
23 verified contacts for Marshall St. Advanced Pollution Control Facility, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Marshall St. Advanced Pollution Control Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Florida
Dunedin · 3 mi away
3.46 MGD
Clearwater · 5 mi away
3.04 MGD
Oldsmar · 9 mi away
1.73 MGD
Palmetto · 34 mi away
1.41 MGD
Bradenton · 37 mi away
7.27 MGD
Plant City · 40 mi away
7.1 MGD
Sarasota · 46 mi away
8.56 MGD
Mulberry · 50 mi away
0.4 MGD
Marshall St. Advanced Pollution Control Facility: 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 May 16, 2025.