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California / Waters /

Big Bear Lake

Reservoir in California, near Big Bear City and Big Bear Lake

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.

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.

Algal bloom advisories: 1 period

  • Algal bloom advisory: to
    4 reports: California State Water Resources Control Board (FHAB program) 4
    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 2026-11-06 09:03 UTC.

Reported discharges over time

  • Hours with a discharge or advisory status on Big Bear Lake in California, last 12 months3,072Reported on Big Bear Lake in California: 0 · Arriving from outfalls upstream, estimated: 0 · Official advisories (beach, algal bloom): 3,072December 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 Big Bear Lake in California70%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 Big Bear Lake in California4Reported on Big Bear Lake in California: 4 · 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.

This record covers Big Bear Lake within California; the same water in another state is a separate record.

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

25 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

25 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

25 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 Big Bear Lake

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

Reports linked to Big Bear Lake, newest first
WhenReportStatus
California State Water Resources Control Board (FHAB program) · Lighthouse observatory · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Boulder Bay (801BBL671) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Big Bear Lake, Stanfield cutoff northern end (801BBL673) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Big Bear Lake, Pine Oak Lane North Beach (801BBL678) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Boulder Bay south east end of cove · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Big Bear at Lagonita Point · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Duane Boyer Dock (West Ramp)-801BBL706 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Carol Morrison dock (East Ramp)-801BBL705 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Big Bear Marina--801BBL704 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Stanfield Middle near MWDL9-801BBL703 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Mid Lake near MWDL6-801BBL702 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Gilner Point Middle near MWDL2-801BBL701 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Gilner Point Middle near MWDL2-801BBL701 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Duane Boyer Dock (West Ramp)-801BBL706 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Carol Morrison dock (East Ramp)-801BBL705 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Big Bear Marina--801BBL704 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Stanfield Middle near MWDL9-801BBL703 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Mid Lake near MWDL6-801BBL702 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Dam Near MWDL1 · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Big Bear Lake-Stanfield Cutoff · Algae advisory · volume not reported report · notice · maplisted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Duane Boyer Dock-801BBL706 · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Carol Morrison Dock-801BBL705 · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Big Bear Marina-801BBL704 · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Stanfield Middle near MWDL9-801BBL703 · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Mid Lake near MWDL6- 801BBL702 · 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 45 records.See them all with filters.

All reports in California by year: 2026 (4 here) · 2024 (1 here) · 2023 (7 here) · 2022 (8 here) · 2021 (8 here) · 2020 (17 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). · Big Bear Lake on OpenBoatLaunch

Nearby waters

Sources covering this water

45 records linked to this water. Updated .