UV disinfection: wastewater treatment plants in Maine
7 plants · 8% of the state · 1 MGD reported by 6 plants
Klarifi identifies 7 publicly owned wastewater treatment plants with uv disinfection in Maine, 8% of the 84 plants in the state (1 MGD reported by 6 plants). The largest is Bucksport Wastewater Treatment Facility in Bucksport at 0.23 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 Maine
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Bucksport Wastewater Treatment Facility | Bucksport | 0.23 | ME0100111 | Jan 2023 | 9 |
| 2 | South Cape Elizabeth WWTF | Cape Elizabeth | 0.14 | ME0102121 | Dec 2021 | 15 |
| 3 | Warren Wastewater Treatment Facility | Warren | 0.07 | ME0102253 | Mar 2030 | 0 |
| 4 | Seal Harbor WWTF | Seal Harbor | 0.05 | ME0102555 | Apr 2025 | 6 |
| 5 | Somesville WWTF | Mount Desert | 0.01 | ME0102547 | May 2025 | 6 |
| 6 | East Machias WWTF | East Machias | 0.0069 | ME0102156 | Jul 2023 | 7 |
| 7 | Sanford Wastewater Treatment Facility | Sanford | — | ME0100617 | Jul 2023 | 4 |
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 Maine
UV disinfection in other states
UV disinfection in Maine: 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.