Southwest Regional WWTP
State Road 37 At Carter Road, Mulberry, FL · Polk County · Publicly Owned Treatment Works
- Average flow
- 4 MGD
- Design flow
- 4 MGD
- NPDES permit
- FLA012954
- Effective
- Permit expires
- June 2036
- Population served
- —
- CWNS 2022
Southwest Regional WWTP is a publicly owned wastewater treatment works in Mulberry, Polk County, Florida treating an average of 4 million gallons per day against a permitted design capacity of 4 MGD. It discharges under NPDES permit FLA012954 (effective), which expires in June 2036.
Treatment technology
One treatment structure or unit process identified at Southwest Regional WWTP.
Available with a free Klarifi account
See the full treatment train at Southwest Regional WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- —
- Effluent violations
- —
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Southwest Regional WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Southwest Regional WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Florida
Mulberry · 2 mi away
0.75 MGD
Bartow · 11 mi away
5.33 MGD
Plant City · 11 mi away
0.02 MGD
Lakeland · 12 mi away
0.02 MGD
Plant City · 12 mi away
4.47 MGD
Lakeland · 13 mi away
8 MGD
Dover · 14 mi away
0.009 MGD
Plant City · 15 mi away
0.02 MGD
Southwest Regional 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 October 22, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms