Chlorine disinfection: wastewater treatment plants in Vermont
32 plants · 42% of the state · 13 MGD combined
Klarifi identifies 32 publicly owned wastewater treatment plants with chlorine disinfection in Vermont, 42% of the 76 plants in the state (13 MGD combined). The largest is Bennington Wastewater Treatment Facility in Bennington at 3.62 MGD.
Chlorine or chloramine disinfection, often followed by dechlorination before discharge, remains the most common effluent disinfection in the United States. Plants on gas chlorine are candidates for conversion to hypochlorite or UV, a recurring capital project driven by safety rules and permit limits on residual chlorine.
The largest plants with chlorine disinfection in Vermont
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Bennington Wastewater Treatment Facility | Bennington | 3.62 | VT0100021 | Jun 2029 | 7 |
| 2 | Essex Junction Wastewater Treatment Facility | Essex Junction | 2.07 | VT0100111 | Jun 2026 | 2 |
| 3 | Brattleboro Wastewater Treatment Facility | Brattleboro | 1.28 | VT0100064 | Sep 2021 | 10 |
| 4 | St Johnsbury | St Johnsbury | 0.9 | VT0100579 | Mar 2023 | 18 |
| 5 | Winooski Sewage Treatment Plant | Winooski | 0.64 | VT0100510 | Jun 2026 | 0 |
| 6 | Bellows Falls Waste Water Treatment Facility | Bellows Falls | 0.55 | VT0100013 | Sep 2021 | 59 |
| 7 | Burlington Riverside Wastewater Treatment Plant | Burlington | 0.55 | VT0100307 | Sep 2009 | 86 |
| 8 | Northfield Wastewater Treatment Facility | Northfield | 0.48 | VT0100242 | Sep 2025 | 18 |
| 9 | Brandon WWTF | Brandon | 0.36 | VT0100056 | Mar 2027 | 13 |
| 10 | Ludlow Wastewater Treatment Facility | Ludlow | 0.27 | VT0100145 | Dec 2019 | 24 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in Vermont
Chlorine disinfection in other states
Chlorine disinfection in Vermont: 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.
Wastewater terms: Tertiary treatment · Ozonation · WWTP · Activated sludge · Oxidation ditch · all terms