Southwest WWTP
3301 South State Highway Ff, Springfield, MO 65807 · Greene County · Publicly Owned Treatment Works
- Average flow
- 30.9 MGD
- Design flow
- —
- NPDES permit
- MO0049522
- Administratively continued
- Permit expires
- July 2025
- Population served
- 206,375
- CWNS 2022
Southwest WWTP is a publicly owned wastewater treatment works in Springfield, Greene County, Missouri treating an average of 30.9 million gallons per day, serving about 206,375 residents. It discharges under NPDES permit MO0049522 (administratively continued), which expires in July 2025, with 0 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in March 2000.
Treatment technology
10 treatment structures and unit processes identified at Southwest WWTP.
Available with a free Klarifi account
See the full treatment train at Southwest WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- 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 Southwest WWTP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Penalties assessed
- $2,888
- all cases
- EPA inspections
- 0
- none on record
Latest case · Mar 2000
CITY OF SPRINGFIELD; SOUTHWEST WWTP, SPRINGFIELD, MO
Administrative order · RCRA, Underground Storage Tanks Violations · Final Order With Penalty · Penalty $2,888
Source: EPA ECHO, civil enforcement case 07-2000-0151.
Full case history with a free Klarifi account
Every action against Southwest WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Springfield
Springfield's capital improvement plan lists 44 water, sewer and wastewater line items worth $131M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Springfield →
| Project | Budget | Years |
|---|---|---|
| Southwest Treatment Plant - Headworks Renewal and Improvements | $15,000,000 | 2028–2029 |
| Environmental Services Operations Facility | $14,250,000 | 2025–2027 |
| Sanitary Sewer Overflow Reduction Project - Lower Wilson Parallel Trunk | $11,000,000 | 2026–2028 |
| Southwest Treatment Plant - Biogas Conversion to Renewable Natural Gas | $8,000,000 | 2025–2025 |
| Shared Cost Sanitary Sewer Construction - Developer Agreements | $7,500,000 | 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 Southwest WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Southwest WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Missouri
Republic · 7 mi away
1.65 MGD
Nixa · 8 mi away
0.12 MGD
Springfield · 10 mi away
5 MGD
Nixa · 10 mi away
1.66 MGD
Clever · 11 mi away
0.18 MGD
Ozark · 11 mi away
0.64 MGD
Ozark · 12 mi away
0.99 MGD
Billings · 13 mi away
0.1 MGD
Southwest 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 10, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms