Collierville Northwest STP
Collierville, TN · Shelby County · Publicly Owned Treatment Works
- Average flow
- 3.38 MGD
- Design flow
- 6 MGD
- NPDES permit
- TN0078841
- Effective
- Permit expires
- January 2028
- Population served
- 25,298
- CWNS 2022
Collierville Northwest STP is a publicly owned wastewater treatment works in Collierville, Shelby County, Tennessee treating an average of 3.38 million gallons per day against a permitted design capacity of 6 MGD, serving about 25,298 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches, biogas balloons. It discharges under NPDES permit TN0078841 (effective), which expires in January 2028, with 3 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Collierville
Collierville's capital improvement plan lists 12 water, sewer and wastewater line items worth $9M starting 2025–2027. The largest budgeted items are shown here.
All water and sewer capital projects in Collierville →
| Project | Budget | Years |
|---|---|---|
| Sewer System Improvements | $2,250,000 | 2027–2029 |
| Water Distribution System Improvements | $1,800,000 | 2027–2029 |
| North Rowlett Water Line | $1,750,000 | 2025–2025 |
| CIPP/SSES Sewer Improvements | $1,200,000 | 2026–2029 |
| Burrows Rd. Water/Sewer Improvement Project | $900,000 | 2025–2026 |
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
2 verified contacts for Collierville Northwest STP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Collierville Northwest STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Tennessee
Collierville · 3 mi away
1.16 MGD
Rossville · 10 mi away
—
Arlington · 13 mi away
0.35 MGD
Arlington · 13 mi away
1.27 MGD
Arlington · 13 mi away
—
Moscow · 17 mi away
0.04 MGD
Memphis · 18 mi away
0.02 MGD
Somerville · 19 mi away
0.28 MGD
Collierville Northwest STP: 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 March 14, 2025.