DirtyWaterWatch

Vermont / Waters /

Seymour Lake

Reservoir in Vermont · near Morgan

Status now

No current report

At least one source we follow covers this water, and nothing it reports applies right now.

Why this colour: No current report: nothing a covering source reports colours this water now. How long a water stays coloured, and why

Source: vt-advisories, last answered 2026-11-02 11:55 UTC. Status computed by DirtyWaterWatch as of 2026-11-02 11:56 UTC.

It is not a finding about the water. Discharges go unreported, reports arrive late, and storm runoff carries bacteria too. Follow posted signs and local health advice.

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

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.

No red or yellow period in this span.

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 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 20260032

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

Every event on Seymour Lake

Events placed on Seymour Lake, newest first
StartEnd Discharger OutfallTypeVolumeSourceLinks
not reported (reported Oct 29, 2026, 3:02 PM EDT) not reported not stated not stated Cyanobacteria advisory not reported Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) via vt-advisories, record cyano:0d0de2d8-69d8-4814-8df9-ec1a7c8ec877, reported Oct 29, 2026, 3:02 PM EDT, retrieved 2026-11-02 11:55 UTC · notice Event: Cyanobacteria advisory, , not reported (reported Oct 29, 2026, 3:02 PM EDT) · Map
not reported (reported Oct 27, 2026, 2:05 PM EDT) not reported not stated not stated Cyanobacteria advisory not reported Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) via vt-advisories, record cyano:bc094cde-65d3-4ce5-893d-f66d31f7ecc4, reported Oct 27, 2026, 2:05 PM EDT, retrieved 2026-11-02 11:55 UTC · notice Event: Cyanobacteria advisory, , not reported (reported Oct 27, 2026, 2:05 PM EDT) · Map
not reported (reported Oct 23, 2026, 1:45 PM EDT) not reported not stated not stated Cyanobacteria advisoryrevised not reported Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) via vt-advisories, record cyano:b9736045-5728-4360-8bbf-382b05c177eb, reported Oct 23, 2026, 1:45 PM EDT, retrieved 2026-11-02 11:55 UTC · notice Event: Cyanobacteria advisory, , not reported (reported Oct 23, 2026, 1:45 PM EDT) · Map
not reported (reported Oct 20, 2026, 2:08 PM EDT) not reported not stated not stated Cyanobacteria advisoryrevised not reported Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) via vt-advisories, record cyano:601dfb6d-345a-4398-8d6f-b8d6b8df413e, reported Oct 20, 2026, 2:08 PM EDT, retrieved 2026-11-02 11:55 UTC · notice Event: Cyanobacteria advisory, , not reported (reported Oct 20, 2026, 2:08 PM 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). · Seymour Lake on OpenBoatLaunch

Sources covering this water

4 events placed on this water in this build.