Danbury Water Pollution Control Facility
Filtration Plant Road, Danbury, CT 06810 · Fairfield County · Publicly Owned Treatment Works
- Average flow
- 9.24 MGD
- Design flow
- 15.5 MGD
- NPDES permit
- CT0100145
- Expired
- Permit expires
- June 2026
- Population served
- 54,876
- CWNS 2022
Danbury Water Pollution Control Facility is a publicly owned wastewater treatment works in Danbury, Fairfield County, Connecticut treating an average of 9.24 million gallons per day against a permitted design capacity of 15.5 MGD, serving about 54,876 residents. It discharges under NPDES permit CT0100145 (expired), which expires in June 2026, with 5 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in November 2011.
Treatment technology
3 treatment structures and unit processes identified at Danbury Water Pollution Control Facility.
Available with a free Klarifi account
See the full treatment train at Danbury Water Pollution Control Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
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 Danbury Water Pollution Control Facility in EPA's ICIS system.
- Formal actions
- 3
- 0 since FY2020
- Penalties assessed
- $33,650
- all cases
- Compliance actions
- $50,300
- required by EPA orders
- EPA inspections
- 5
- latest Oct 2012
Latest case · Nov 2011
Danbury WPCF
Administrative order · CWA, SPCC and/or Federal Response Plan Violations · Final Order With Penalty · Penalty $30,000
EPA's description of the case:
“On November 3, 2011, Region 1 filed a Consent Agreement and Final Order (CAFO) (Docket Number CWA-01-2010-0079) resolving Clean Water Act (CWA) violations against the City of Danbury, CT. In its…”
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Source: EPA ECHO, civil enforcement case 01-2011-2020.
Full case history with a free Klarifi account
Every action against Danbury Water Pollution Control Facility with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Danbury
Danbury's capital improvement plan lists 51 water, sewer and wastewater line items worth $102M starting 2025–2025. The largest budgeted items are shown here.
All water and sewer capital projects in Danbury →
| Project | Budget | Years |
|---|---|---|
| West Side Sewer Line Program - Phase II | $20,000,000 | 2025–2028 |
| EcoFactory | $11,400,000 | 2025–2027 |
| Margerie High Service Tank and Interconnection | $8,040,000 | 2025–2028 |
| Water Supply Safe Yield Improvement Projects | $7,920,000 | 2025–2028 |
| Sewer Interceptor Capacity Upgrades | $6,500,000 | 2025–2028 |
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
10 verified contacts for Danbury Water Pollution Control Facility, with validated emails and direct phone numbers.
Unlock 10 verified contacts (7 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Danbury Water Pollution Control Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
Newtown · 7 mi away
0.34 MGD
Redding · 10 mi away
0.03 MGD
Seymour · 17 mi away
1.12 MGD
Ansonia · 18 mi away
1.71 MGD
Beacon Falls · 18 mi away
0.34 MGD
New Canaan · 18 mi away
0.87 MGD
Shelton · 18 mi away
2.12 MGD
Westport · 20 mi away
1.84 MGD
Danbury Water Pollution Control Facility: 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 February 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms