California / Reports /

Sanitary sewer overflow (SSO) reported — Rolling Hills Estates City, Sep 7, 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 908032, reported Sep 8, 2026, 1:10 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: Rolling Hills Estates City (federal wastewater discharge permit, NPDES, 4SSO10423). Outlet: “1545-0291 ([house number removed] Highridge Road, Rolling Hills Estates, CA 90274)”. Location: 33.76081, -118.38007; 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: “Manhattan Beach-Frontal Santa Monica Bay Watershed”. Not linked to a mapped water. The report names no water and no outlet listed in EPA and state records.

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

Sep 7, 2026, 10:35 AM PDT

Ended

Sep 7, 2026, 2:09 PM PDT

Detail provided by the source

Times known to the minute

Reported to the source

Sep 8, 2026, 1:10 PM PDT

Published

not given

Source last updated

Sep 21, 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

5,000 gallons (estimated)

Volume as reported

“5,000 gallons spilled (estimated total leaving the sewer system); 4,000 gallons reached surface water; 1,000 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

Source and versions

Source

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

Source record number

908032

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "region": "4",
  "wdid": "4SSO10423",
  "enrollee_status": "Active",
  "system_name": "Rolling Hills City Estates CS",
  "agency_name": "Rolling Hills Estates City",
  "spill_event_id": "908032",
  "version": "1.2",
  "spill_status": "Certified",
  "draft_submitted_on": "09-SEP-26",
  "first_certified_on": "21-SEP-26",
  "final_certified_on": "21-SEP-26",
  "spill_type": "Category 1 Spill",
  "location_name": "1545-0291 ([house number removed] Highridge Road, Rolling Hills Estates, CA 90274)",
  "enrollee_notified_at": "09/07/2026 12:00",
  "crew_arrival_at": "09/07/2026 13:30",
  "start_at": "09/07/2026 10:35",
  "caloes_notified_at": "09/08/2026 13:10",
  "caloes_control_number": "26-4598",
  "technical_report_on": null,
  "lat": "33.76081",
  "lon": "-118.38007",
  "appearance_points": "Manhole",
  "volume_total_gal": "5000",
  "reached_drainage_system": "Y",
  "volume_recovered_from_drainage_gal": "0",
  "volume_left_in_drainage_gal": "4000",
  "volume_to_surface_water_gal": "4000",
  "volume_recovered_gal": "1000",
  "destinations": "Drainage Conveyance System that discharges to surface water; Paved Surface; Street/Curb and Gutter (2 3)",
  "destination_points_given": "Y",
  "end_at": "09/07/2026 14:09",
  "causes": "Fats, Oil and Grease (FOG)",
  "failure_location": "Gravity Mainline",
  "storm_event": "N",
  "response_completed_at": "09/07/2026 14:30",
  "receiving_water": "Manhattan Beach-Frontal Santa Monica Bay Watershed",
  "receiving_water_type": "Ocean",
  "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": 33.761,
      "lon": -118.38
    },
    {
      "lat": 33.761,
      "lon": -118.38
    }
  ]
}