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California / Waters /

Lake Isabella

Lake in California, near Lake Isabella, Mountain Mesa and Wofford Heights

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.

Square boat markers mark boat launches listed by OpenBoatLaunch. Larger round markers with a label mark beach and other official advisories nearby.

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

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: Surface Water - Freshwater Harmful Algal Blooms (last successful check 2026-11-06 08:37 UTC). Status by DirtyWaterWatch, updated 2026-11-06 09:03 UTC. · Updated

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: a status resting on a source that could not be checked on schedule.

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

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-06 09:03 UTC.

Reported discharges over time

  • Hours with a discharge or advisory status on Lake Isabella in California, last 12 months5,808Reported on Lake Isabella in California: 0 · Arriving from outfalls upstream, estimated: 0 · Official advisories (beach, algal bloom): 5,808December 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 Lake Isabella in California49%May to October 2026Share 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 Lake Isabella in California0last 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

33 discharges reported to last more than 31 days are counted as 31 days.

Source: ca-swrcb-fhab. Records cover March 4, 2016 to November 6, 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

33 discharges reported to last more than 31 days are counted as 31 days.

Source: ca-swrcb-fhab. Records cover March 4, 2016 to November 6, 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

33 discharges reported to last more than 31 days are counted as 31 days.

Source: ca-swrcb-fhab. Records cover March 4, 2016 to November 6, 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.

  • ca-swrcb-fhab: records from March 4, 2016 to the latest update

Reports linked to Lake Isabella

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

Reports linked to Lake Isabella, newest first
WhenReportStatus
California State Water Resources Control Board (FHAB program) · Stine Cove · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · French Gulch Marina · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Kissack Bay/Cove · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Patterson Lane (12) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Hanning Flat (10) · Algae advisory · volume not reported report · notice · maplisted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Camp Nine South · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Paradise Cove · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · South Fork Marina · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Auxiliary Dam Boat Launch · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Old Isabella Road · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · French Gulch Campground E · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · French Gulch Campground W · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, KissackBay · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Patterson Lane · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Camp Nine South · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Tillie Creek Campground · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Stine Cove · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Hanning Flat · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Kissack Cove · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Paradise Cove · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, South Fork Marina · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Old Isabella Road · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Auxiliary Dam Boat Launch · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Boulder Gulch Campground · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Isabella, Tillie Creek Boat Launch · Algae advisory · volume not reported report · notice · maplifted

Sources: Surface Water - Freshwater Harmful Algal Blooms, retrieved 2026-11-06 03:07 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

Showing the latest 25 records of 38 records.See them all with filters.

All reports in California by year: 2026 (1 here) · 2025 (2 here) · 2023 (2 here) · 2021 (7 here) · 2020 (13 here) · 2019 (12 here) · 2016 (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

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

Nearby waters

Sources covering this water

38 records linked to this water. Updated .