DirtyWaterWatch

Vermont / Waters /

Shelburne Pond

Lake in Vermont · near Shelburne

Status now

Advisory in effect

A sewage discharge on this water is reported as ongoing, or it ended less than the authority's advice window ago (48 hours in most New England wording), or an official advisory or closure is in effect. The authorities' advice is to avoid contact with the water.

Why this colour: Advisory in effect: the authority's advisory, in effect until it is lifted. Rationale: in effect while the authority keeps the advisory (aged out 14 days after the last confirmation when no end is given) (source: https://www.healthvermont.gov/environment/tracking/cyanobacteria-blue-green-algae-tracker) How long a water stays coloured, and why

Cyanobacteria advisory in effect · Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) · since Oct 20, 2026, 10:03 AM EDT

Source: Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) via vt-advisories, record cyano:50fec305-06ea-4322-8b31-7b3561eeb487, reported Oct 20, 2026, 10:03 AM EDT, retrieved 2026-11-02 11:55 UTC · notice

As of Nov 2, 2026, 6:56 AM EST.

Events behind the colour

What the authorities advise

“Vermont Department of Health tracker legend: High Alert means a lot of cyanobacteria were observed collecting into a dense bloom that extends at least 10-15 feet offshore.”

Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) · source · event

Source: Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) via vt-advisories, record cyano:50fec305-06ea-4322-8b31-7b3561eeb487, reported Oct 20, 2026, 10:03 AM EDT, retrieved 2026-11-02 11:55 UTC · notice

Map

Source: water outlines from OpenBoatLaunch and OpenStreetMap contributors (ODbL); outfalls from EPA ECHO and the state outfall layers; modeled reaches computed by DirtyWaterWatch from USGS NLDI, NHDPlus and the nearest USGS gauge (Jobson 1996); basemap OpenFreeMap and OpenMapTiles.

Outfalls are small brown dots.

The last 90 days

Last 90 days, hour by hour. Red: advisory in effect; yellow: caution; hatched yellow: unresolved, no end reported; grey: no current report; hatched purple: a source was not updating.

Source: hourly statuses computed by DirtyWaterWatch (pipeline build/status.py) from the events linked above and the rules on the methods page; history as of 2026-11-02 11:56 UTC.

Discharges over the years

  • Hours under advisory, last 12 months310Dec 2025 to Nov 2026; partly covered or sparse source
  • 2026 season under advisory24%May to October, partly covered; 278 h

Hours under advisory per month

Hours this water was under an advisory, by the map's red rules.

  • Advisory in effect
  • No source
  • Partly covered or sparse source
No sourceNo source

No source covers 2022-01 to 2026-08.

Source: Vermont advisories (cyanobacteria, Burlington beaches). Covered 2026-09-13 to 2026-11-02.

Show table
Hours under advisory per month
MonthHours under advisoryFrom discharge windowsOfficial advisory onlyHours in monthCoverage
Jan 2022000744No source
Feb 2022000672No source
Mar 2022000744No source
Apr 2022000720No source
May 2022000744No source
Jun 2022000720No source
Jul 2022000744No source
Aug 2022000744No source
Sep 2022000720No source
Oct 2022000744No source
Nov 2022000720No source
Dec 2022000744No source
Jan 2023000744No source
Feb 2023000672No source
Mar 2023000744No source
Apr 2023000720No source
May 2023000744No source
Jun 2023000720No source
Jul 2023000744No source
Aug 2023000744No source
Sep 2023000720No source
Oct 2023000744No source
Nov 2023000720No source
Dec 2023000744No source
Jan 2024000744No source
Feb 2024000696No source
Mar 2024000744No source
Apr 2024000720No source
May 2024000744No source
Jun 2024000720No source
Jul 2024000744No source
Aug 2024000744No source
Sep 2024000720No source
Oct 2024000744No source
Nov 2024000720No source
Dec 2024000744No source
Jan 2025000744No source
Feb 2025000672No source
Mar 2025000744No source
Apr 2025000720No source
May 2025000744No source
Jun 2025000720No source
Jul 2025000744No source
Aug 2025000744No source
Sep 2025000720No source
Oct 2025000744No source
Nov 2025000720No source
Dec 2025000744No source
Jan 2026000744No source
Feb 2026000672No source
Mar 2026000744No source
Apr 2026000720No source
May 2026000744No source
Jun 2026000720No source
Jul 2026000744No source
Aug 2026000744No source
Sep 2026000720Partly covered or sparse source
Oct 20262780278744
Nov 20263203232

Hours under advisory per year

Hours under advisory each year; 2026 to date.

  • Advisory in effect
  • Partly covered or sparse source
Sparse sourceSparse source

Source: Vermont advisories (cyanobacteria, Burlington beaches). Covered 2026-09-13 to 2026-11-02.

Show table
Hours under advisory per year
YearHours under advisoryShare of the yearCoverage
20263104.2%Partly covered or sparse source

Share of the May to October season under advisory

Share of the hours from May 1 to October 31 with an advisory in effect.

  • Advisory in effect
  • Season partly covered

Seasons only partly covered by a source: 2026 (share is of the covered hours).

Source: Vermont advisories (cyanobacteria, Burlington beaches). Covered 2026-09-13 to 2026-11-02.

Show table
Share of the May to October season under advisory
SeasonShare under advisoryHours under advisoryHours coveredSeason hoursPartly covered
202623.8%2781,1664,416yes
How these charts are counted

Discharge events are counted once: where a source publishes both public notices and verified reports (MassDEP, Vermont DEC), a discharger's month with any verified report counts its verified reports only, and other months count notices. Revisions are folded into the record they revise, and EPA copies of a state report are not counted twice. Monthly and yearly totals (Maine DEP, EPA discharge monitoring reports, Portsmouth) are shown on their own and never added to the event counts. Hours under advisory follow the map's red rules. A muted band marks periods no source covers: a gap there is missing data, not a quiet month.

  • Vermont advisories (cyanobacteria, Burlington beaches): 2026-09-13 to now

Every event on Shelburne Pond

Events placed on Shelburne Pond, newest first
StartEnd Discharger OutfallTypeVolumeSourceLinks
Oct 20, 2026, 10:03 AM EDT in effect not stated not stated Cyanobacteria advisory not reported Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) via vt-advisories, record cyano:50fec305-06ea-4322-8b31-7b3561eeb487, reported Oct 20, 2026, 10:03 AM EDT, retrieved 2026-11-02 11:55 UTC · notice Event: Cyanobacteria advisory, , Oct 20, 2026, 10:03 AM EDT · Map

Outfalls on this water

No outfall in the registry is matched to this water.

Launches

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, ODbL). · Shelburne Pond on OpenBoatLaunch

Sources covering this water

1 event placed on this water in this build.