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Sanitary sewer overflow (SSO) reported — Los Angeles Cnty DPW, Sep 28, 2026

Ended (as reported) · California State Water Resources Control Board (CIWQS Sanitary Sewer System Database)

Source: California State Water Resources Control Board (CIWQS Sanitary Sewer System Database) via State Water Board CIWQS Sanitary Sewer System spill data: Cat1-2-3-Spills.txt (nightly flat file), record 908300, reported Sep 28, 2026, 2:00 PM PDT, retrieved 2026-11-05 15:08 UTC · Read the original notice

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1. Reported wastewater outlet

Operator named in the record: Los Angeles Cnty DPW (federal wastewater discharge permit, NPDES, 4SSO11365). Outlet: “1534-0101 (S Sherbourne Dr and W Slauson Ave, Unincorporated Los Angeles, CA)”. Location: 33.98856, -118.37548; location source: given in the source record.

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

2. Waters named in the notice

The notice names: “Ballona Creek”. DirtyWaterWatch links this report to Ballona Creek, CA. Match basis: the water named in the report.

3. Estimated downstream stretch

No downstream estimate is available for this report.

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When it happened and when it was reported

Event and notice times use Eastern Time (EST or EDT). Retrieval times use Coordinated Universal Time (UTC).

Started

Sep 28, 2026, 11:20 AM PDT

Ended

Sep 28, 2026, 1:25 PM PDT

Detail provided by the source

Times known to the minute

Reported to the source

Sep 28, 2026, 2:00 PM PDT

Published

not given

Source last updated

Oct 8, 2026, 12:00 AM PDT

Last retrieved by DirtyWaterWatch

2026-11-05 15:08 UTC

What and how much

Type

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

Status in the record

Ended (as reported)

Material

“untreated sewage”

Volume

500 gallons (estimated)

Volume as reported

“500 gallons spilled (estimated total leaving the sewer system); 450 gallons reached surface water; 50 gallons recovered”

Advice from California State Water Resources Control Board (CIWQS Sanitary Sewer System Database)

This report includes no advice. Check current local health notices.

Advice period

This report does not state a period. See the rule DirtyWaterWatch applies and its source.

Basis

not stated

Status history from this report

• Discharge or advisory reported Ballona Creek: Discharge reported ongoing, Sep 28, 2026, 11:20 AM PDT to Sep 28, 2026, 1:25 PM PDT
• Caution Ballona Creek: Within the caution period after the reported end, Sep 28, 2026, 1:25 PM PDT to Oct 1, 2026, 1:25 PM PDT

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-06 09:03 UTC.

Source and versions

Source

State Water Board CIWQS Sanitary Sewer System spill data: Cat1-2-3-Spills.txt (nightly flat file)

Source record number

908300

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "region": "4",
  "wdid": "4SSO11365",
  "enrollee_status": "Active",
  "system_name": "Unincorporated County Area CSMD South/County Sanitation District CS",
  "agency_name": "Los Angeles Cnty DPW",
  "spill_event_id": "908300",
  "version": "1.2",
  "spill_status": "Certified",
  "draft_submitted_on": "30-SEP-26",
  "first_certified_on": "08-OCT-26",
  "final_certified_on": "08-OCT-26",
  "spill_type": "Category 1 Spill",
  "location_name": "1534-0101 (S Sherbourne Dr and W Slauson Ave, Unincorporated Los Angeles, CA)",
  "enrollee_notified_at": "09/28/2026 12:35",
  "crew_arrival_at": "09/28/2026 13:00",
  "start_at": "09/28/2026 11:20",
  "caloes_notified_at": "09/28/2026 14:00",
  "caloes_control_number": "26-5010",
  "technical_report_on": null,
  "lat": "33.98856",
  "lon": "-118.37548",
  "appearance_points": "Manhole",
  "volume_total_gal": "500",
  "reached_drainage_system": "Y",
  "volume_recovered_from_drainage_gal": "50",
  "volume_left_in_drainage_gal": "450",
  "volume_to_surface_water_gal": "450",
  "volume_recovered_gal": "50",
  "destinations": "Drainage Conveyance System that discharges to surface water; Paved Surface; Street/Curb and Gutter (2 3)",
  "destination_points_given": "Y",
  "end_at": "09/28/2026 13:25",
  "causes": "Root Intrusion",
  "failure_location": "Gravity Mainline",
  "storm_event": "N",
  "response_completed_at": "09/28/2026 14:15",
  "receiving_water": "Ballona Creek",
  "receiving_water_type": "Stream/Creek",
  "public_access_impact": "Other (specify below)",
  "closing_entity": "N/A",
  "days_closed_or_restricted": "0",
  "within_1000_ft_of_intake": "N",
  "samples_collected": "N",
  "spill_category": "1",
  "reached_water": true,
  "destination_points": [
    {
      "lat": 33.989,
      "lon": -118.375
    }
  ]
}