Callahan Intermediate School WWTF
State Road 108, Callahan, FL · Nassau County · Publicly Owned Treatment Works
- Average flow
- 0.0099 MGD
- Design flow
- 0.0099 MGD
- NPDES permit
- FLA011666
- Effective
- Permit expires
- October 2031
- Population served
- —
- CWNS 2022
Callahan Intermediate School WWTF is a publicly owned wastewater treatment works in Callahan, Nassau County, Florida treating an average of 0.0099 million gallons per day against a permitted design capacity of 0.0099 MGD. It discharges under NPDES permit FLA011666 (effective), which expires in October 2031.
Treatment technology
4 treatment structures and unit processes identified at Callahan Intermediate School WWTF.
Available with a free Klarifi account
See the full treatment train at Callahan Intermediate School WWTF: 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 Callahan Intermediate School WWTF, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Callahan Intermediate School WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Florida
Callahan · 4 mi away
0.15 MGD
Jacksonville · 8 mi away
0.02 MGD
Hilliard · 10 mi away
0.26 MGD
Jacksonville · 19 mi away
0.18 MGD
Yulee · 20 mi away
1.71 MGD
Jacksonville · 20 mi away
21.38 MGD
Jacksonville · 24 mi away
11.38 MGD
Macclenny · 24 mi away
0.62 MGD
Callahan Intermediate School WWTF: 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