DirtyWaterWatch Public waters. Public record.

Vermont / Waters /

Lake Bomoseen

Lake in Vermont · near Bomoseen, Castleton, West Castleton

Current status

No current status shown

No current status is assigned to this water outline. Check the water page for reports and any estimated downstream stretches.

Why this status: No current status: no report we track sets a status on this water outline now.

How long each status lasts, and why

Sources checked: Cyanobacteria Tracker; volunteer and staff observations (last successful check 2026-11-02 15:55 UTC). Status by DirtyWaterWatch, updated 2026-11-02 16:21 UTC.

No status does not mean the water is safe. Follow posted signs and local health advice.

Updated Nov 2, 2026, 11:21 AM EST.

Bookmark this water page and check it before each trip · Report a missing notice or error

Map

Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Grey: no current status on the water outline. Purple hatching: source update overdue.

No discharge, advisory or caution periods are shown on this water outline in this time span. Check downstream stretches and source coverage.

Source: DirtyWaterWatch calculations using the reports linked above and the published status rules. Updated 2026-11-02 16:21 UTC.

Reported discharges over time

  • Hours under advisory, last 12 months0Dec 2025 to Nov 2026; partly covered or sparse source
  • 2026 season under advisory0.0%May to October, partly covered; 0 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 windowsHours in monthCoverage
Jan 202200744No source
Feb 202200672No source
Mar 202200744No source
Apr 202200720No source
May 202200744No source
Jun 202200720No source
Jul 202200744No source
Aug 202200744No source
Sep 202200720No source
Oct 202200744No source
Nov 202200720No source
Dec 202200744No source
Jan 202300744No source
Feb 202300672No source
Mar 202300744No source
Apr 202300720No source
May 202300744No source
Jun 202300720No source
Jul 202300744No source
Aug 202300744No source
Sep 202300720No source
Oct 202300744No source
Nov 202300720No source
Dec 202300744No source
Jan 202400744No source
Feb 202400696No source
Mar 202400744No source
Apr 202400720No source
May 202400744No source
Jun 202400720No source
Jul 202400744No source
Aug 202400744No source
Sep 202400720No source
Oct 202400744No source
Nov 202400720No source
Dec 202400744No source
Jan 202500744No source
Feb 202500672No source
Mar 202500744No source
Apr 202500720No source
May 202500744No source
Jun 202500720No source
Jul 202500744No source
Aug 202500744No source
Sep 202500720No source
Oct 202500744No source
Nov 202500720No source
Dec 202500744No source
Jan 202600744No source
Feb 202600672No source
Mar 202600744No source
Apr 202600720No source
May 202600744No source
Jun 202600720No source
Jul 202600744No source
Aug 202600744No source
Sep 202600720Partly covered or sparse source
Oct 202600744
Nov 20260036

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
202600.0%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
20260.0%01,1664,416yes
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

Reports linked to Lake Bomoseen

Reports linked to Lake Bomoseen, newest first
StartEnd Sewer operator OutletTypeVolumeSourceLinks
start not reported (reported Oct 31, 2026, 3:11 PM EDT) end not reported not stated Not provided Cyanobacteria advisory (harmful blue-green algae) volume not reported Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations), record cyano:340e7c44-85ba-45bc-8451-4b5d50bd03da, reported Oct 31, 2026, 3:11 PM EDT, retrieved 2026-11-02 15:55 UTC · Read the original notice Read report: Cyanobacteria advisory (harmful blue-green algae), , start not reported (reported Oct 31, 2026, 3:11 PM EDT) · Map
start not reported (reported Oct 31, 2026, 2:54 PM EDT) end not reported not stated Not provided Cyanobacteria advisory (harmful blue-green algae) volume not reported Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations), record cyano:97919483-4855-4863-8ea5-ff9657d60f02, reported Oct 31, 2026, 2:54 PM EDT, retrieved 2026-11-02 15:55 UTC · Read the original notice Read report: Cyanobacteria advisory (harmful blue-green algae), , start not reported (reported Oct 31, 2026, 2:54 PM EDT) · Map

Wastewater outlets on this water

Outfall: a pipe or outlet where wastewater enters a water body.

No wastewater outlet in our records is linked to this water.

Boat launches

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Lake Bomoseen on OpenBoatLaunch

Sources covering this water

2 records linked to this water. Updated Nov 2, 2026, 11:21 AM EST.