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Anaerobic digesters and biogas: wastewater treatment plants in Vermont

24 plants · 38% of the state · 11 MGD reported by 19 plants

Klarifi identifies 24 publicly owned wastewater treatment plants with anaerobic digesters and biogas in Vermont, 38% of the 64 plants in the state (11 MGD reported by 19 plants). The largest is Bennington Wastewater Treatment Facility in Bennington at 2.53 MGD.

Anaerobic digesters stabilise sludge in sealed heated tanks and produce biogas, visible from the air as digester silos and gas holders. Plants with digesters are typically above 5 MGD and are the buyers of mixing, heating, gas handling, cogeneration and dewatering equipment.

Anaerobic digesters and biogas plants nationwide →All plants in Vermont →Largest plants in Vermont →

The largest plants with anaerobic digesters in Vermont

The 24 largest plants with anaerobic digesters and biogas in Vermont by average flow, with permit expiry and three-year violation count.
#FacilityCityAvg flow (MGD)NPDES permitExpiresViolations (3y)
1Bennington Wastewater Treatment FacilityBennington2.53VT0100021Jun 20297
2St Albans CitySt Albans1.77VT0100323Sep 202218
3Essex Junction Wastewater Treatment FacilityEssex Junction1.67VT0100111Jun 20262
4Montpelier Wastewater Treatment FacilityMontpelier1.22VT0100196Sep 20220
5St JohnsburySt Johnsbury0.95VT0100579Mar 202318
6Springfield Wastewater Treatment FacilitySpringfield0.6VT0100374Sep 202018
7Winooski Sewage Treatment PlantWinooski0.46VT0100510Jun 20260
8Northfield Wastewater Treatment FacilityNorthfield0.33VT0100242Sep 202518
9Stowe WPCFStowe0.28VT0100455Sep 202585
10Brandon WWTFBrandon0.22VT0100056Mar 202712
11Swanton Village Wastewater Treatment FacilitySwanton0.22VT0100501Jun 202313
12Castleton Wastewater Treatment FacilityCastleton0.17VT0100897Jun 20240
13Ludlow Wastewater Treatment FacilityLudlow0.1VT0100145Dec 201924
14Barton Wastewater Treatment FacilityBarton0.04VT0100641Mar 202416
15Village Of North Troy MtpNorth Troy0.04VT0100234Jun 202357
16BethelBethel0.04VT0100048Dec 20271
17Pittsford Wastewater Treatment FacilityPittsford0.02VT0100692Mar 20270
18Whitingham (jacksonville)Jacksonville0.02VT0101044Jun 2028100
19West PawletWest Pawlet0.0062VT0101192Jun 20243
20Bellows Falls Waste Water Treatment FacilityBellows Falls—VT0100013Sep 202140
21Bradford WPCPBradford—VT0100803Dec 20200
22Brattleboro Wastewater Treatment FacilityBrattleboro—VT0100064Sep 20216
23Burlington Riverside Wastewater Treatment PlantBurlington—VT0100307Sep 200986
24Woodstock Waste Treatment PlantWoodstock—VT0100757Mar 202015

Plants planning anaerobic digesters and biogas upgrades

These plants report anaerobic digesters and biogas as a planned process in the EPA Clean Watersheds Needs Survey: the earliest public signal of a project.

Vermont plants with anaerobic digesters and biogas recorded as a planned process.
FacilityCityAvg flow (MGD)NPDES permitExpires
Montpelier Wastewater Treatment FacilityMontpelier1.22VT0100196Sep 2022

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.

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Other technologies in Vermont

Lagoon systems (31)Activated sludge and clarifiers (19)UV disinfection (21)Chlorine disinfection (27)Nutrient removal (14)

Anaerobic digesters and biogas in other states

Wisconsin (144)New York (137)Ohio (115)Minnesota (106)Michigan (96)Pennsylvania (94)Illinois (93)California (78)Iowa (69)Texas (68)Indiana (59)New Jersey (34)

Anaerobic digesters and biogas 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 September 11, 2026.

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