Washington / Reports /

Treatment plant bypass reported — Kennewick POTW, Aug 9, 2026

Ended (as reported) · Washington State Department of Ecology (sewage spill list, RCW 90.48.636)

Source: Washington State Department of Ecology (sewage spill list, RCW 90.48.636) via Washington Ecology Sewage Spills list (RCW 90.48.636 public website), record eef23d6f-60a4-4df6-896f-7d19d18fd0c2, the source gives no report time, retrieved 2026-11-06 06:01 UTC · Read the original notice

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1. Reported wastewater outlet

Operator named in the record: Kennewick POTW (federal wastewater discharge permit, NPDES, WA0044784). Outlet: “416 N. Kingwood St. Kennewick WA 99336”. Location: not given in the report or in the outlet records.

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

2. Waters named in the notice

The notice names: “Columbia River”. DirtyWaterWatch links this report to Columbia River, WA. 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

Aug 9, 2026, 12:42 PM EDT

Ended

Aug 9, 2026, 1:28 PM EDT

Detail provided by the source

Times known to the minute

Reported to the source

not given

Published

not given

Source last updated

not given

Last retrieved by DirtyWaterWatch

2026-11-06 06:01 UTC

What and how much

Type

Treatment bypass: wastewater skips one or more treatment steps.

Status in the record

Ended (as reported)

Material

“Partial Treatment - Disinfectio”

Volume

177,321 gallons (not stated whether estimated or measured)

Volume as reported

“177,321 gallons”

Advice from Washington State Department of Ecology (sewage spill list, RCW 90.48.636)

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 Columbia River: Discharge reported ongoing, Aug 9, 2026, 12:42 PM EDT to Aug 9, 2026, 1:28 PM EDT
• Caution Columbia River: Within the caution period after the reported end, Aug 9, 2026, 1:28 PM EDT to Aug 12, 2026, 1:28 PM EDT

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-06 06:13 UTC.

Source and versions

Source

Washington Ecology Sewage Spills list (RCW 90.48.636 public website)

Source record number

eef23d6f-60a4-4df6-896f-7d19d18fd0c2

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "row": {
    "objectid": 47,
    "globalid": "{EEF23D6F-60A4-4DF6-896F-7D19D18FD0C2}",
    "ecology_region": "Central",
    "start_date_and_time": 1786293720000,
    "permitee": "Kennewick POTW",
    "location": "416 N. Kingwood St. Kennewick WA 99336",
    "county": "Benton",
    "initial_estimated_amount": "177,321 gallons ",
    "level_of_treatment": "Partial Treatment - Disinfectio",
    "potentially_impacted_area": "Columbia River",
    "end_event_timedate": 1786296480000,
    "final_event_duration_hours": "48 minutes, (0.8 hours)",
    "final_total_event_volume": "177,321 gallons ",
    "link_to_5_day_report": "https://apps.ecology.wa.gov/paris/DownloadDocument.aspx?id=645142",
    "event_type": "Disinfection Failure_",
    "event_type_other": null,
    "erts_number": "749044",
    "was_the_spill_continuous": "Continuous"
  },
  "potentially_impacted_area": "Columbia River",
  "reached_water": true,
  "report_url": "https://apps.ecology.wa.gov/paris/DownloadDocument.aspx?id=645142",
  "erts_number": "749044",
  "county": "Benton",
  "duration_text": "48 minutes, (0.8 hours)",
  "continuous": "Continuous"
}