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Chlorine disinfection: wastewater treatment plants in Vermont

27 plants · 42% of the state · 7 MGD reported by 22 plants

Klarifi identifies 27 publicly owned wastewater treatment plants with chlorine disinfection in Vermont, 42% of the 64 plants in the state (7 MGD reported by 22 plants). The largest is Bennington Wastewater Treatment Facility in Bennington at 2.53 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.

Chlorine disinfection plants nationwide →All plants in Vermont →Largest plants in Vermont →

The largest plants with chlorine disinfection in Vermont

The 25 largest plants with chlorine disinfection 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
2Essex Junction Wastewater Treatment FacilityEssex Junction1.67VT0100111Jun 20262
3St JohnsburySt Johnsbury0.95VT0100579Mar 202318
4Winooski Sewage Treatment PlantWinooski0.46VT0100510Jun 20260
5Northfield Wastewater Treatment FacilityNorthfield0.33VT0100242Sep 202518
6Brandon WWTFBrandon0.22VT0100056Mar 202712
7Manchester Town Water & Sewer DeptManchester0.18VT0100170Sep 20230
8RandolphRandolph0.17VT0100285Sep 2020240
9Ludlow Wastewater Treatment FacilityLudlow0.1VT0100145Dec 201924
10Williamstown WPCFWilliamstown0.07VT0100722Dec 20222
11Wilmington WWTPWilmington0.05VT0100706Sep 20235
12Barton Wastewater Treatment FacilityBarton0.04VT0100641Mar 202416
13Fairfax Wastewater Treatment FacilityFairfax0.04VT0101087Jun 2023133
14Village Of North Troy MtpNorth Troy0.04VT0100234Jun 202357
15Orleans Wastewater Treatment FacilityOrleans0.04VT0100251Mar 202493
16Royalton WWTFSouth Royalton0.03VT0100854Jun 20240
17Richford Wastewater Treatment FacilityRichford0.03VT0100790Jun 202383
18Jeffersonville W W T FVergennes0.02VT0101150Jun 202330
19Pittsford Wastewater Treatment FacilityPittsford0.02VT0100692Mar 20270
20Marshfield Wastewater Treatment FacilityMarshfield0.02VT0100471Dec 20257
21Readsboro WPCReadsboro0.01VT0100731Mar 20282
22Orwell W P C FOrwell0.0034VT0100676Jun 20242
23Bellows Falls Waste Water Treatment FacilityBellows Falls—VT0100013Sep 202140
24Brattleboro Wastewater Treatment FacilityBrattleboro—VT0100064Sep 20216
25Burlington Riverside Wastewater Treatment PlantBurlington—VT0100307Sep 200986

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)Anaerobic digesters and biogas (24)UV disinfection (21)Nutrient removal (14)

Chlorine disinfection in other states

Missouri (96)Maine (45)West Virginia (36)Florida (30)Massachusetts (25)Kentucky (18)Texas (14)Arizona (12)Georgia (11)Alaska (6)Mississippi (5)

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 September 11, 2026.

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