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Sanitary sewer overflow (SSO) reported — Rio Vista City, Sep 20, 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 908220, reported Sep 23, 2026, 10:20 AM 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: Rio Vista City (federal wastewater discharge permit, NPDES, 5SSO11037). Outlet: “River Rd. Lift Station”. Location: 38.16182, -121.68416; 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: “Sacramento River”. DirtyWaterWatch links this report to Sacramento River, 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 20, 2026, 12:01 PM PDT

Ended

Sep 20, 2026, 11:40 PM PDT

Detail provided by the source

Times known to the minute

Reported to the source

Sep 23, 2026, 10:20 AM PDT

Published

not given

Source last updated

Sep 24, 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

4,000 gallons (estimated)

Volume as reported

“4,000 gallons spilled (estimated total leaving the sewer system); 1,500 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 Sacramento River: Discharge reported ongoing, Sep 20, 2026, 12:01 PM PDT to Sep 20, 2026, 11:40 PM PDT
• Caution Sacramento River: Within the caution period after the reported end, Sep 20, 2026, 11:40 PM PDT to Sep 23, 2026, 11:40 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

908220

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "region": "5S",
  "wdid": "5SSO11037",
  "enrollee_status": "Active",
  "system_name": "Rio Vista Waste Trt Facility CS",
  "agency_name": "Rio Vista City",
  "spill_event_id": "908220",
  "version": "1.1",
  "spill_status": "Certified",
  "draft_submitted_on": null,
  "first_certified_on": "24-SEP-26",
  "final_certified_on": "24-SEP-26",
  "spill_type": "Category 1 Spill",
  "location_name": "River Rd. Lift Station",
  "enrollee_notified_at": "09/20/2026 23:45",
  "crew_arrival_at": "09/20/2026 23:00",
  "start_at": "09/20/2026 12:01",
  "caloes_notified_at": "09/23/2026 10:20",
  "caloes_control_number": "26-4922",
  "technical_report_on": null,
  "lat": "38.16182",
  "lon": "-121.68416",
  "appearance_points": "Gravity Mainline",
  "volume_total_gal": "4000",
  "reached_drainage_system": "N",
  "volume_recovered_from_drainage_gal": "0",
  "volume_left_in_drainage_gal": "0",
  "volume_to_surface_water_gal": "1500",
  "volume_recovered_gal": "0",
  "destinations": "Paved Surface; Surface Water; Unpaved Surface",
  "destination_points_given": "Y",
  "end_at": "09/20/2026 23:40",
  "causes": "Pump Station Failure - Controls; Pump Station Failure - Mechanical; Pump Station Failure - Power",
  "failure_location": "Pump Station - Controls; Pump Station - Mechanical; Pump Station - Power",
  "storm_event": "N",
  "response_completed_at": "09/24/2026 08:45",
  "receiving_water": "Sacramento River",
  "receiving_water_type": "River",
  "public_access_impact": "Other (specify below)",
  "closing_entity": "City of Rio Vista",
  "days_closed_or_restricted": "0",
  "within_1000_ft_of_intake": "N",
  "samples_collected": "N",
  "spill_category": "1",
  "reached_water": true,
  "destination_points": [
    {
      "lat": 38.161,
      "lon": -121.685
    }
  ]
}