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California / Waters /

Lake Elsinore

Lake in California, near Lake Elsinore

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.

Ringed dots mark treatment plant outfalls. Square boat markers mark boat launches listed by OpenBoatLaunch.

Check Elsinore Valley Municipal Water District's notices · 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: State Water Board CIWQS Sanitary Sewer System spill data: Cat1-2-3-Spills.txt (nightly flat file) (last successful check 2026-11-06 08:37 UTC); Surface Water - Freshwater Harmful Algal Blooms (last successful check 2026-11-06 08:37 UTC); a public source (last successful check 2026-11-06 08:38 UTC); a public source (last successful check 2026-11-06 08:39 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
    5 reports: California State Water Resources Control Board (FHAB program) 5
    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

  • Discharges affecting Lake Elsinore in California, last 12 months0December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once. Arriving discharges are estimated from modeled downstream reaches.
  • Hours with a discharge or advisory status on Lake Elsinore in California, last 12 months7,464Reported on Lake Elsinore in California: 0 · Arriving from outfalls upstream, estimated: 0 · Official advisories (beach, algal bloom): 7,464December 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 Elsinore in California87%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 Elsinore in California5Reported on Lake Elsinore in California: 5 · 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.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater.

Reported discharges per month

0 reported discharges, January 2022 to November 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other
  • Incomplete source coverage

Sources: ca-swrcb-ciwqs-spills-flatfile; U.S. Environmental Protection Agency sewer overflow records. Records cover January 1, 2022 to November 6, 2026.

Show table

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

20 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

20 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

20 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-ciwqs-spills-flatfile: records from January 1, 2022 to the latest update
  • ca-swrcb-fhab: records from March 4, 2016 to the latest update
  • U.S. Environmental Protection Agency sewer overflow records: records from May 3, 2022 to the latest update (limited records)

Reports linked to Lake Elsinore

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

Reports linked to Lake Elsinore, newest first
WhenReportStatus
California State Water Resources Control Board (FHAB program) · Perret Park · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · mid-lake (city site) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · West Marina (city site) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Launch Pointe Boat Ramp (city site) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Elm Grove Beach (city site) · Algae advisory · volume not reported report · notice · maplisted
California State Water Resources Control Board (FHAB program) · Launch Pointe NE dock end · Algae advisory · volume not reported report · notice · maplisted
to Dec 30 ’22California State Water Resources Control Board (FHAB program) · In open water near TMDL LE02 · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Near TMDL LE02 · Algae advisory · volume not reported report · notice · maplifted
California State Water Resources Control Board (FHAB program) · Launch Pointe NE dock end · Algae advisory · volume not reported report · notice · maplisted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Near TMDL LE02 · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’21California State Water Resources Control Board (FHAB program) · Launch Pointe NE dock end · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore, Launch Point (La Laguna Beach) · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore, Elmgrove Beach · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore Marina and RV Park · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore Perret Park · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore - Inlet Channel · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore, Inlet Channel · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore, at Perret Park · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’20California State Water Resources Control Board (FHAB program) · Lake Elsinore, at Marina and RV Park · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’19California State Water Resources Control Board (FHAB program) · Lake Elsinore, open water · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’19California State Water Resources Control Board (FHAB program) · Lake Elsinore, Launch Point (La Laguna Beach) · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’19California State Water Resources Control Board (FHAB program) · Lake Elsinore, Elmgrove Beach · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’19California State Water Resources Control Board (FHAB program) · Lake Elsinore, Lake Elsinore Marina (west side) · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’19California State Water Resources Control Board (FHAB program) · Lake Elsinore, Elmgrove Beach · Algae advisory · volume not reported report · notice · maplifted
to Dec 31 ’19California State Water Resources Control Board (FHAB program) · Lake Elsinore, Perret Park · 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 37 records.See them all with filters.

All reports in California by year: 2023 (6 here) · 2022 (3 here) · 2021 (7 here) · 2020 (6 here) · 2019 (5 here) · 2018 (8 here) · 2017 (1 here) · 2016 (1 here)

Wastewater outlets on this water

Outfall: a pipe or outlet where wastewater enters a water body.

Treatment plant outfalls

1 outfall

Source: U.S. Environmental Protection Agency (EPA) permit records (ICIS-NPDES permitted features): where a treatment plant’s permitted discharge leaves. No national source says whether a plant outfall is open or closed.

Sewer operators listed for this water: Elsinore Valley Municipal Water District.

Boat launches

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

Nearby waters

Sources covering this water

37 records linked to this water. Updated .