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Sanitary sewer overflow (SSO) reported — Los Angeles Cnty DPW, Oct 21, 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 908688, reported Oct 21, 2026, 1:45 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: “2121-0277 ([house number removed] Lynd Avenue, Arcadia, CA) Unincorporated County Area”. Location: 34.10626, -118.01252; 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: “The sewage discharged from the storm drain system into Peck Road Water Conservation Park. The park's lake was the receiving water body.”. DirtyWaterWatch links this report to Rio Hondo, CA. Match basis: the report's location, matched to the nearest tracked water.

3. Estimated downstream stretch

We estimate routes only on rivers before they become tidal. We do not estimate routes through tidal water or lakes.

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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

Oct 21, 2026, 10:51 AM PDT

Ended

Oct 21, 2026, 12:55 PM PDT

Detail provided by the source

Times known to the minute

Reported to the source

Oct 21, 2026, 1:45 PM PDT

Published

not given

Source last updated

Nov 4, 2026, 12:00 AM PST

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); 500 gallons reached surface water; 0 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 Rio Hondo: Discharge reported ongoing, Oct 21, 2026, 10:51 AM PDT to Oct 21, 2026, 12:55 PM PDT
• Caution Rio Hondo: Within the caution period after the reported end, Oct 21, 2026, 12:55 PM PDT to Oct 24, 2026, 12:55 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

908688

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": "908688",
  "version": "1.2",
  "spill_status": "Certified",
  "draft_submitted_on": "22-OCT-26",
  "first_certified_on": "04-NOV-26",
  "final_certified_on": "04-NOV-26",
  "spill_type": "Category 1 Spill",
  "location_name": "2121-0277 ([house number removed] Lynd Avenue, Arcadia, CA) Unincorporated County Area",
  "enrollee_notified_at": "10/21/2026 10:56",
  "crew_arrival_at": "10/21/2026 12:15",
  "start_at": "10/21/2026 10:51",
  "caloes_notified_at": "10/21/2026 13:45",
  "caloes_control_number": "26-5465",
  "technical_report_on": null,
  "lat": "34.10626",
  "lon": "-118.01252",
  "appearance_points": "Manhole",
  "volume_total_gal": "500",
  "reached_drainage_system": "Y",
  "volume_recovered_from_drainage_gal": "0",
  "volume_left_in_drainage_gal": "500",
  "volume_to_surface_water_gal": "500",
  "volume_recovered_gal": "0",
  "destinations": "Drainage Conveyance System that discharges to surface water; Street/Curb and Gutter (2 3)",
  "destination_points_given": "Y",
  "end_at": "10/21/2026 12:55",
  "causes": "Fats, Oil and Grease (FOG)",
  "failure_location": "Gravity Mainline",
  "storm_event": "N",
  "response_completed_at": "10/21/2026 13:40",
  "receiving_water": "The sewage discharged from the storm drain system into Peck Road Water Conservation Park. The park's lake was the receiving water body.",
  "receiving_water_type": "Lake",
  "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": 34.106,
      "lon": -118.013
    },
    {
      "lat": 34.106,
      "lon": -118.012
    }
  ]
}