UV disinfection: wastewater treatment plants in Vermont
25 plants · 33% of the state · 10 MGD combined
Klarifi identifies 25 publicly owned wastewater treatment plants with uv disinfection in Vermont, 33% of the 76 plants in the state (10 MGD combined). The largest is St Albans City in St Albans at 3.2 MGD.
Ultraviolet disinfection destroys pathogens in the final effluent without chemicals or a chlorine residual. It has replaced chlorine at many plants since the 2000s and needs lamp, ballast and sleeve replacement on a fixed cycle, which keeps these plants in the market for UV suppliers.
The largest plants with UV disinfection in Vermont
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | St Albans City | St Albans | 3.2 | VT0100323 | Sep 2022 | 18 |
| 2 | Montpelier Wastewater Treatment Facility | Montpelier | 1.92 | VT0100196 | Sep 2022 | 0 |
| 3 | Middlebury Wastewater Treatment Facility | Middlebury | 1.13 | VT0100188 | Sep 2013 | 12 |
| 4 | Springfield Wastewater Treatment Facility | Springfield | 0.8 | VT0100374 | Sep 2020 | 18 |
| 5 | Milton W P C | Milton | 0.36 | VT0100684 | Jun 2023 | 0 |
| 6 | Stowe WPCF | Stowe | 0.36 | VT0100455 | Sep 2025 | 107 |
| 7 | Wastewater Treatment Facility #2 | Shelburne | 0.33 | VT0100820 | Dec 2022 | 63 |
| 8 | Morrisville WPCF | Morrisville | 0.31 | VT0100480 | Jun 2023 | 0 |
| 9 | Castleton Wastewater Treatment Facility | Castleton | 0.29 | VT0100897 | Jun 2024 | 0 |
| 10 | West Rutland | West Rutland | 0.23 | VT0100714 | Sep 2027 | 2 |
Plants planning uv disinfection upgrades
These plants report uv disinfection as a planned process in the EPA Clean Watersheds Needs Survey: the earliest public signal of a project.
| Facility | City | Avg flow (MGD) | NPDES permit | Expires |
|---|---|---|---|---|
| S. Woodstock Wastewater Treatment Facility | Woodstock | 0.02 | VT0100749 | Sep 2021 |
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
UV disinfection in other states
UV 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 · Inflow and infiltration · Sludge dewatering · all terms