Cyanobacteria advisory (harmful blue-green algae) reported, Nov 2, 2026
Advisory active · Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations)
Source: Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations), record cyano:431454a8-50f7-42c6-8815-b62da36e893b, reported Nov 4, 2026, 12:38 PM EST, retrieved 2026-11-05 06:15 UTC · Read the original notice
Current status from this report
Discharge or advisory reported on Silver Lake: Official advisory in effect. Current rule period ends Nov 18, 2026, 12:38 PM EST. This is not a water-quality test.
Why this status: Discharge or advisory reported: official advisory.
Why we use this rule: An official advisory is listed. We show it while the authority keeps it in place; an old or missing update does not mean the advisory was lifted.
A report is not a test of the water. See how we assign statuses.
Read the original notice · Report an error
1. Where the advisory applies
Issued by: Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations). Location: 43.72867, -72.61833; location source: given in the source record.
2. Waters named in the notice
The notice names: “Silver Lake”. DirtyWaterWatch links this report to Silver Lake, VT. Match basis: the water named in the report.
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.
When it happened and when it was reported
Event and notice times use Eastern Time (EST or EDT). Retrieval times use Coordinated Universal Time (UTC).
- Started
- Ended
- not reported
- Detail provided by the source
- Times known to the minute
- Reported to the source
- Published
- not given
- Source last updated
- Last retrieved by DirtyWaterWatch
What was reported
- Type
- Cyanobacteria (harmful blue-green algae) can make water unfit for contact; the issuing authority decides when its advisory ends.
- Status in the record
- Advisory active
- Material
- “cyanobacteria (visual observation)”
Advice from Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations)
“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.”
- Advice period
- This report does not state a period. See the rule DirtyWaterWatch applies and its source.
- Basis
- not stated
Status history from this report
- Discharge or advisory reported Silver Lake: Official advisory in effect, Nov 2, 2026, 11:18 AM EST to Nov 18, 2026, 12:38 PM EST (the end is scheduled: a new report can change it)
- No current status shown Silver Lake: advisory not re-confirmed by its source recently, no map colour, Nov 18, 2026, 12:38 PM EST to Jan 31, 2027, 11:18 AM EST (scheduled: a new report can change it)
Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-05 06:27 UTC.
Source and versions
- Source
- Cyanobacteria Tracker; volunteer and staff observations
- Source record number
- cyano:431454a8-50f7-42c6-8815-b62da36e893b
- Original notice
- Read the original notice
- Earlier version
- Read the earlier version
- Later versions
- None
Record details
| Record identifier | vt-advisories:cyano:431454a8-50f7-42c6-8815-b62da36e893b |
|---|---|
| Source identifier | vt-advisories |
| Source record number | cyano:431454a8-50f7-42c6-8815-b62da36e893b |
| Earlier version | vt-advisories:cyano:29935532-9ae3-4388-8733-ec9bb6279309 |
| Type | Cyanobacteria advisory (harmful blue-green algae) |
| Status in the report | Advisory active |
| Sewer operator identifier | Not provided |
| Sewer operator | Not provided |
| Federal wastewater discharge permit (NPDES) | Not provided |
| Outlet number | Not provided |
| Outlet name | Not provided |
| Water named in the report | Silver Lake |
| Linked waters | silver-lake-vt |
| How this report was linked to the water | the water named in the report |
| Latitude | 43.729 |
| Longitude | -72.618 |
| Location source | given in the source record |
| Location accuracy, in metres | Not provided |
| Started | Nov 2, 2026, 11:18 AM EST (2026-11-02T11:18:00-05:00) |
| Ended | Not provided |
| Detail provided by the source | to the minute |
| Reported to the source | Nov 4, 2026, 12:38 PM EST (2026-11-04T12:38:00-05:00) |
| Published | Not provided |
| Source last updated | Nov 4, 2026, 12:38 PM EST (2026-11-04T12:38:00-05:00) |
| Last retrieved by DirtyWaterWatch | Nov 5, 2026, 1:15 AM EST (2026-11-05T06:15:32Z) |
| Material | cyanobacteria (visual observation) |
| Volume, in gallons | Not provided |
| Volume as reported | Not provided |
| How volume was determined | not stated whether estimated or measured |
| Authority | Vermont Department of Health (Cyanobacteria Tracker; volunteer and staff observations) |
| Advice | Quoted in full above |
| Advice period, in hours | Not provided |
| Basis of the advice period | Not provided |
| Original notice | https://www.healthvermont.gov/environment/tracking/cyanobacteria-blue-green-algae-tracker |
Original source data
{
"OBJECTID": 3614,
"ReportDate": 1793813880000,
"Waterbody": "Silver Lake",
"Municipality": "Barnard",
"SiteName": "Barnard General Store Recreation Area",
"StatusWeb": "High Alert",
"GlobalID": "431454a8-50f7-42c6-8815-b62da36e893b"
} Staff names, email addresses and phone numbers are removed from source data before it is stored.