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Rhode Island / Waters /

Lake Mishnock

Lake in Rhode Island, near West Greenwich

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, and its source

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.

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About this status

No current status shown: no report we track sets a status on this water now; how statuses work. No status does not mean the water is safe. Follow posted signs and local health advice.

Sources checked: RIDEM advisories layer (last successful check 2026-11-03 17:38 UTC). Status by DirtyWaterWatch, updated 2026-11-03 17:44 UTC. · Updated

Reports in Rhode Island can appear days after a discharge; a quiet map can mean a report has not appeared yet. How Rhode Island reports

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Plum: algal bloom advisory. Red or amber with a light line inside: beach advisory or caution. Dotted: monthly report (days with discharge, dates not given). Grey: no current status on the water outline. Purple hatching: source update overdue.

Algal bloom advisories: 1 period

  • Algal bloom advisory: to
    1 report: RIDEM and RIDOH cyanobacteria advisories (RIDEM advisories layer) 1
    Show records

    The records are also in the report table on this page.

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-03 17:44 UTC.

Reported discharges over time

  • Hours with a discharge or advisory status on the Lake Mishnock in Rhode Island, last 12 months673Reported on the Lake Mishnock in Rhode Island: 0 · Arriving from outfalls upstream, estimated: 0December 2025 to November 2026Red hours by the map's rules: each discharge to its reported end plus the state's post-discharge period; overlapping hours count once.
  • 2026 season with a discharge or advisory status on the Lake Mishnock in Rhode Island17%May to October 2026; incomplete source coverageShare of May 1 to October 31 hours with red status by the map's rules, of the hours a source covered.
  • Records behind the last-90-days strip for the Lake Mishnock in Rhode Island1Reported on the Lake Mishnock in Rhode Island: 1 · Arriving from outfalls upstream, estimated: 0last 90 daysEvery distinct record the strip lists for its red, yellow and unresolved hours, notices and unresolved reports included; counted as the strip counts them.

Hours with a discharge or advisory status per month

Hours when this water had a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported
  • No tracked source for this period
  • Incomplete source coverage
No tracked source

No tracked source covers January 2022 to April 2026.

Source: Rhode Island Department of Environmental Management cyanobacteria advisories. Records cover May 21, 2026 to November 3, 2026.

Show table

Hours with a discharge or advisory status per year

Hours with a discharge or advisory status each year under DirtyWaterWatch rules; 2026 to date.

  • Discharge or advisory reported
  • Incomplete source coverage
Limited records

Source: Rhode Island Department of Environmental Management cyanobacteria advisories. Records cover May 21, 2026 to November 3, 2026.

Show table

Share of the May to October season with a discharge or advisory status

Share of the hours from May 1 to October 31 with a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported
  • Season with incomplete source coverage

Seasons with incomplete source coverage: 2026. The share is of the hours a source covered.

Source: Rhode Island Department of Environmental Management cyanobacteria advisories. Records cover May 21, 2026 to November 3, 2026.

Show table
How these charts are counted

We count each discharge once. Where a source publishes notices and confirmed reports, we use confirmed reports for an operator's month when available; otherwise we use notices. We combine revisions and exclude duplicate state reports copied by the U.S. Environmental Protection Agency (EPA). Monthly and yearly totals appear separately. Status hours follow this site's rules. Shaded gaps mean missing coverage, not zero discharges.

  • Rhode Island Department of Environmental Management cyanobacteria advisories: records from May 21, 2026 to the latest update

Reports linked to Lake Mishnock

Cyanobacteria (harmful blue-green algae) can make water unfit for contact; the issuing authority decides when its advisory ends.

Reports linked to Lake Mishnock, newest first
WhenReportStatus
to Aug 28, 4:03 PMRIDEM and RIDOH cyanobacteria advisories (RIDEM advisories layer) · Algae advisory · volume not reported report · notice · maplifted

Sources: RIDEM advisories layer, retrieved 2026-11-03 17:38 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

All reports in Rhode Island by year: 2026 (1 here)

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

No public boat launch is listed in our records for this water.

Nearby waters

Sources covering this water

1 record linked to this water. Updated .