Hilliard WWTF
Hilliard, FL · Nassau County · Publicly Owned Treatment Works
- Average flow
- 0.33 MGD
- Design flow
- 0.48 MGD
- NPDES permit
- FL0043079
- Effective
- Permit expires
- February 2030
- Population served
- 2,920
- CWNS 2022
Hilliard WWTF is a publicly owned wastewater treatment works in Hilliard, Nassau County, Florida treating an average of 0.33 million gallons per day against a permitted design capacity of 0.48 MGD, serving about 2,920 residents. Treatment on site includes biosolids aerobic digestion, biosolids mechanical dewatering, disinfection, chlorine/ chloramine, primary clarification or sedimentation, screening. It discharges under NPDES permit FL0043079 (effective), which expires in February 2030, with 104 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biosolids Aerobic Digestion
unit processBiosolids Mechanical Dewatering
unit processDisinfection, chlorine/ chloramine
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 104
- Effluent violations
- 44
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Hilliard WWTF, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Hilliard WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Florida
Callahan · 10 mi away
0.14 MGD
Yulee · 22 mi away
2.22 MGD
Jacksonville · 28 mi away
0.2 MGD
Jacksonville · 29 mi away
24.34 MGD
Macclenny · 32 mi away
0.69 MGD
Jacksonville · 34 mi away
12.59 MGD
Orange Park · 38 mi away
0.96 MGD
Middleburg · 41 mi away
1.65 MGD
Hilliard 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 September 11, 2026; facility record last updated August 18, 2026.