California / Waters /
Islais Creek Channel
River in California, past San Francisco
Current status
Radar shows that recent rain at a combined sewer system's outlets has reached the amount set for that system, and its operator has not reported a discharge. It reads "discharge likely" where the amount is the one at which that system has discharged before, or a rain trigger its state publishes, and "discharge possible" where only this site's default of 0.1 inch applies. This is an estimate, not a report. This status since . 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.
Solid dots mark combined sewer outfalls. Ringed dots mark treatment plant outfalls. A yellow ring with a dashed edge means discharge likely or possible: heavy rain, no report received. Square boat markers mark boat launches listed by OpenBoatLaunch.
Check San Francisco Public Utilities Commission's notices · Bookmark this water page and check it before each trip · Report a missing notice or error
About this status
Discharge possible: heavy rain, no report received: heavy rain at a sewer operator's outlets reached this site's default amount, and no report received; shown for 48 hours after the rain (site rule). 3.9 in of rain fell in the 24 hours to Nov 6, 2026, 12:00 AM PST at San Francisco Public Utilities Commission's outfalls (NOAA radar estimate).
Source: NOAA National Weather Service, MRMS radar-only rainfall estimate, valid Nov 6, 2026, 12:00 AM PST, retrieved 2026-11-06 08:57 UTC; threshold: site default; rule: How it works, discharge likely or possible. · Updated
The last 90 days
- Discharge likely or possible: heavy rain, no report received: to the latest update Radar estimate, no report received: heavy rain at the outlets of San Francisco Public Utilities Commission (SFPUC)
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 the Islais Creek Channel 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.
- Records behind the last-90-days strip for the Islais Creek Channel in California1Reported on the Islais Creek Channel in California: 0 · Arriving from outfalls upstream, estimated: 0 · Other records (rain-likely and similar): 1last 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
| Month | Combined sewer overflow | Sanitary sewer overflow | Treatment bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| January 2022 | 0 | 0 | 0 | 0 | Incomplete source coverage | |
| February 2022 | 0 | 0 | 0 | 0 | ||
| March 2022 | 0 | 0 | 0 | 0 | ||
| April 2022 | 0 | 0 | 0 | 0 | ||
| May 2022 | 0 | 0 | 0 | 0 | ||
| June 2022 | 0 | 0 | 0 | 0 | ||
| July 2022 | 0 | 0 | 0 | 0 | ||
| August 2022 | 0 | 0 | 0 | 0 | ||
| September 2022 | 0 | 0 | 0 | 0 | ||
| October 2022 | 0 | 0 | 0 | 0 | ||
| November 2022 | 0 | 0 | 0 | 0 | ||
| December 2022 | 0 | 0 | 0 | 0 | ||
| January 2023 | 0 | 0 | 0 | 0 | ||
| February 2023 | 0 | 0 | 0 | 0 | ||
| March 2023 | 0 | 0 | 0 | 0 | ||
| April 2023 | 0 | 0 | 0 | 0 | ||
| May 2023 | 0 | 0 | 0 | 0 | ||
| June 2023 | 0 | 0 | 0 | 0 | ||
| July 2023 | 0 | 0 | 0 | 0 | ||
| August 2023 | 0 | 0 | 0 | 0 | ||
| September 2023 | 0 | 0 | 0 | 0 | ||
| October 2023 | 0 | 0 | 0 | 0 | ||
| November 2023 | 0 | 0 | 0 | 0 | ||
| December 2023 | 0 | 0 | 0 | 0 | ||
| January 2024 | 0 | 0 | 0 | 0 | ||
| February 2024 | 0 | 0 | 0 | 0 | ||
| March 2024 | 0 | 0 | 0 | 0 | ||
| April 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 0 | 0 | 0 | 0 | ||
| June 2024 | 0 | 0 | 0 | 0 | ||
| July 2024 | 0 | 0 | 0 | 0 | ||
| August 2024 | 0 | 0 | 0 | 0 | ||
| September 2024 | 0 | 0 | 0 | 0 | ||
| October 2024 | 0 | 0 | 0 | 0 | ||
| November 2024 | 0 | 0 | 0 | 0 | ||
| December 2024 | 0 | 0 | 0 | 0 | ||
| January 2025 | 0 | 0 | 0 | 0 | ||
| February 2025 | 0 | 0 | 0 | 0 | ||
| March 2025 | 0 | 0 | 0 | 0 | ||
| April 2025 | 0 | 0 | 0 | 0 | ||
| May 2025 | 0 | 0 | 0 | 0 | ||
| June 2025 | 0 | 0 | 0 | 0 | ||
| July 2025 | 0 | 0 | 0 | 0 | ||
| August 2025 | 0 | 0 | 0 | 0 | ||
| September 2025 | 0 | 0 | 0 | 0 | ||
| October 2025 | 0 | 0 | 0 | 0 | ||
| November 2025 | 0 | 0 | 0 | 0 | ||
| December 2025 | 0 | 0 | 0 | 0 | ||
| January 2026 | 0 | 0 | 0 | 0 | ||
| February 2026 | 0 | 0 | 0 | 0 | ||
| March 2026 | 0 | 0 | 0 | 0 | ||
| April 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 0 | 0 | 0 | 0 | ||
| June 2026 | 0 | 0 | 0 | 0 | ||
| July 2026 | 0 | 0 | 0 | 0 | ||
| August 2026 | 0 | 0 | 0 | 0 | ||
| September 2026 | 0 | 0 | 0 | 0 | ||
| October 2026 | 0 | 0 | 0 | 0 | ||
| November 2026 | 0 | 0 | 0 | 0 |
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
- U.S. Environmental Protection Agency sewer overflow records: records from May 3, 2022 to the latest update (limited records)
Reports linked to Islais Creek Channel
| When | Report | Status |
|---|---|---|
| to Feb 28, 9:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Feb 25, 8:27 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Feb 22, 9:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Jan 9, 8:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Jan 4, 8:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Dec 31 ’25, 8:37 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Dec 29 ’25, 8:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Dec 17 ’25, 8:12 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Dec 3 ’25, 8:23 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Nov 22 ’25, 8:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Nov 20 ’25, 8:51 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Nov 5 ’25, 9:05 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Oct 18 ’25, 8:00 AM PDT | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Sep 10 ’25, 8:21 AM PDT | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Aug 29 ’25, 8:00 AM PDT | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Apr 9 ’25, 10:00 AM PDT | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Mar 12 ’25, 8:35 AM PDT | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Feb 18 ’25, 7:04 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Feb 12 ’25, 8:10 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Feb 10 ’25, 2:30 PM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to 10:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to 11:59 PM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Dec 25 ’24, 8:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Dec 20 ’24, 8:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
| to Nov 28 ’24, 8:00 AM PST | San Francisco Department of Public Health via Beach Watch · Islais Creek Channel - Islais creek at Islais Landing · Beach advisory · volume not reported report · notice · map | lifted |
Sources: Beach Watch: Beach Advisories (Postings and Closures) and Beach Water Quality Monitoring, retrieved 2026-11-04 15:26 UTC. A report's record id and times show when you hover or focus its "report" link.
All reports in California by year: 2026 (5 here) · 2025 (16 here) · 2024 (4 here)
Beaches named in these records: Islais Creek Channel - Islais creek at Islais Landing.
Wastewater outlets on this water
Outfall: a pipe or outlet where wastewater enters a water body.
Combined sewer outfalls
5 outfalls · discharge possible now at 5
Discharge possible: heavy rain, no report received at 5 outfalls now: radar rainfall has reached the operator's threshold and no discharge report has arrived (NOAA radar estimate).
- Outfall 031 · San Francisco Public Utilities Commission · receiving water in the permit: Islais Creek Channel · temporarily closed (counted as open) · discharge possible now: heavy rain, no report received
- Outfall 031A · San Francisco Public Utilities Commission · receiving water in the permit: Islais Creek Channel · temporarily closed (counted as open) · discharge possible now: heavy rain, no report received
- Outfall 032 · San Francisco Public Utilities Commission · receiving water in the permit: Islais Creek Channel · temporarily closed (counted as open) · discharge possible now: heavy rain, no report received
- Outfall 033 · San Francisco Public Utilities Commission · receiving water in the permit: Islais Creek Channel · temporarily closed (counted as open) · discharge possible now: heavy rain, no report received
- Outfall 035 · San Francisco Public Utilities Commission · receiving water in the permit: Islais Creek Channel · temporarily closed (counted as open) · discharge possible now: heavy rain, no report received
Source: U.S. Environmental Protection Agency (EPA) national combined sewer outfall inventory (ECHO) and state outfall layers. Open or closed as EPA's inventory lists it. DirtyWaterWatch links outlets to waters using permit numbers, locations and names.
Treatment plant outfalls
1 outfall
- Outfall 002 · San Francisco Public Utilities Commission · receiving water in the permit: Islais Creek Channel · status not published
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: San Francisco Public Utilities Commission.
Boat launches
- Islais Creek BTAF, San Francisco · Carry-in launch (canoe and kayak)
Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Islais Creek Channel on OpenBoatLaunch
Nearby waters
- Mission Creek, CA Discharge possible: heavy rain, no report received about 3 km away
- Oakland Inner Harbor, CA No current status shown about 9 km away
- Lake Merced, CA No current status shown about 10 km away
- San Francisco Bay, CA Discharge possible: heavy rain, no report received about 11 km away
- Unnamed stream near South San Francisco, CA No current status shown about 12 km away
Sources covering this water
- Beach Watch: Beach Advisories (Postings and Closures) and Beach Water Quality Monitoring · Latest check succeeded · Last successful check: 2026-11-06 08:37 UTC
- State Water Board CIWQS Sanitary Sewer System spill data: Cat1-2-3-Spills.txt (nightly flat file) · Latest check succeeded · Last successful check: 2026-11-06 08:37 UTC
- a public source · Latest check succeeded · Last successful check: 2026-11-06 08:38 UTC
- a public source · Latest check succeeded · Last successful check: 2026-11-06 08:39 UTC
- a public source · Latest check succeeded · Last successful check: 2026-11-06 08:57 UTC
25 records linked to this water. Updated .