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California / Sewer operators /

City of Oakland Public Works

Sewer utility · California · Oakland

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. Small hollow diamonds mark places named in its overflow reports (provisional). Square boat markers mark boat launches listed by OpenBoatLaunch.

Federal wastewater discharge permit (NPDES)
2SSO11204, CA0038512
Wastewater outlets
1 treatment plant outfall listed by EPA or state agencies; 12 places named in its own overflow reports (provisional locations) · List
Waters listed as receiving wastewater
Lake Merritt; SAN FRANCISCO BAY
Tracked waters
San Francisco Bay, CA, Arroyo Viejo, CA, Sausal Creek, CA
Discharge records counted
12 records · latest
Total reported volume in these records
16,726 gallons across the 12 records that give a volume

These totals reflect the records we track. Missing volumes and gaps in reporting limit comparisons between operators.

Sources: EPA ECHO and the operator and state sources linked below. Counts use the discharge records on this page. Updated 2026-11-06 09:03 UTC.

Public notices and alerts

Pages where City of Oakland Public Works or the state publishes its notices (check them for an alert sign-up):

Its public-notice channels

Source: City of Oakland Public Works's public notice and alert pages and the state's notification records; DirtyWaterWatch register of public-notice channels and its page monitor.

Report a missing notice or error

Wastewater outlets

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

1 treatment plant outfall listed by EPA or state agencies; 12 places named in its own overflow reports (provisional locations).

Treatment plant outfalls

1 outfall
  • Plant outfall · receiving water in the permit: SAN FRANCISCO BAY · San Francisco Bay, CA · status not published · shown at the treatment plant (the outlet's own location is 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.

Places named in overflow reports (provisional)

12 places · 6 not on the map (reports say the sewage reached no water)

Provisional location from overflow reports. Where the operator's own reports put an overflow: a manhole, pump station or plant. Not an outfall listed in a permit.

  • Reported place · 1 overflow report, latest Oct 14, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Oct 5, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Sep 24, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Sep 8, 2026 · confidence medium · no water record yet · not on the map: its reports say the sewage did not reach a water
  • Reported place · 1 overflow report, latest Sep 7, 2026 · confidence medium · no water record yet · not on the map: its reports say the sewage did not reach a water
  • Reported place · 1 overflow report, latest Sep 7, 2026 · confidence medium · no water record yet · not on the map: its reports say the sewage did not reach a water
  • Reported place · 1 overflow report, latest Sep 4, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Sep 2, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Sep 1, 2026 · confidence medium · no water record yet · not on the map: its reports say the sewage did not reach a water
  • Reported place · 1 overflow report, latest Aug 22, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Aug 2, 2026 · confidence medium · no water record yet · not on the map: its reports say the sewage did not reach a water
  • Reported place · 1 overflow report, latest Jul 29, 2026 · confidence medium · no water record yet · not on the map: its reports say the sewage did not reach a water

Source: the operator's own overflow reports to the state. DirtyWaterWatch groups reports within 50 metres into one place and finds the water below it with U.S. Geological Survey river maps (NLDI, NHDPlus). Not a permitted outfall; provisional until an official outfall record exists.

Reports and advisories

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports linked to City of Oakland Public Works, newest first
WhenReportStatus
to 4:03 PM PDTArroyo Viejo · Grass Valley & Golf Links Rd · SSO · 369 gallons report · notice · mapended
to 3:00 PM PDT“54th Avenue, and Peralta Courtland, Seminary Creek” · [house number removed] International Blvd. · SSO · 243 gallons report · notice · mapended
to 1:37 PM PDTSausal Creek · [house number removed] Saroni Drive, Oakland Ca · SSO · 485 gallons report · notice · mapended
to Sep 29, 6:50 PM PDTWater not mapped · [house number removed] Monterey Blvd, Oakland Ca · SSO · 457 gallons report · notice · mapended
to Sep 10, 4:39 PM PDTWater not mapped · [house number removed] Empire Road, Oakland Ca · SSO · 505 gallons report · notice · mapended
to 2:33 PM PDTWater not mapped · International Blvd and 84th Ave Oakland, Ca.94603 · SSO · 318 gallons report · notice · mapended
to 9:23 PM PDT“Trestle Glen Creek” · [house number removed] Brookwood Road, Oakland Ca · SSO · 146 gallons report · notice · mapended
to 1:35 PM PDTSan Francisco Bay · 14th St. & Castro St. · SSO · 2,010 gallons report · notice · mapended
to Sep 2, 9:25 AM PDTWater not mapped · [house number removed] 90th Avenue, Oakland Ca · SSO · 805 gallons report · notice · mapended
to Aug 26, 6:26 PM PDT“Elmhurst creek. (Tidal creek).” · [house number removed] Thermal Street Oakland, Ca. 94605 · SSO · 10,860 gallons report · notice · mapended
to Aug 3, 4:15 PM PDTWater not mapped · [house number removed] Gilbert St. Oakland Ca, · SSO · 71 gallons report · notice · mapended
to 4:19 PM PDTWater not mapped · [house number removed] Lyon Avenue, Oakland Ca · SSO · 457 gallons report · notice · mapended

Sources: State Water Board CIWQS Sanitary Sewer System spill data: Cat1-2-3-Spills.txt (nightly flat file), retrieved 2026-11-05 15:08 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 California by year: 2026 (12 from City of Oakland Public Works)

Other sewer operators on these waters

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.
  • Caution: to
    1 report: Arroyo Viejo 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: Arroyo Viejo 1
    Show records

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

  • Caution: to
    1 report: Sausal Creek 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: Sausal Creek 1
    Show records

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

  • Caution: to
    1 report: San Francisco Bay 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: San Francisco Bay 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 2026-11-06 09:03 UTC.

Reported discharges over time

  • Discharges reported by City of Oakland Public Works, last 12 months12December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by City of Oakland Public Works, last 12 months37December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status from City of Oakland Public Works's reports, last 12 months706December 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 (City of Oakland Public Works)16%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.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. 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

12 reported discharges, January 2022 to November 2026.

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

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 to November 6, 2026.

Show table

Hours with a discharge or advisory status per month

Hours when a water had a discharge or advisory status from this sewer operator's reports, under DirtyWaterWatch rules.

  • Discharge or advisory reported
  • Incomplete source coverage

Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 to November 6, 2026.

Show table

Days with a reported discharge per month

A day counts when any counted discharge was under way on it, from its start to its reported end in Eastern Time; a report with no end counts its start day.

  • Incomplete source coverage

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 to November 6, 2026.

Show table

Reported volume per year

Gallons (axis: K thousand, M million), summed from the 12 reports that gave a volume as a number.

  • Incomplete source coverage
Limited records

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 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
Limited records

Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 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

Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 to November 6, 2026.

Show table

Reported discharges by calendar month, all years

Every counted discharge report, by the calendar month it began.

Months are summed over every year a tracked source covers; the table gives the number of years behind each month.

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 to November 6, 2026.

Show table

Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 12, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.

Source: ca-swrcb-ciwqs-spills-flatfile. Records cover January 1, 2022 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