Washington / Reports /

Sanitary sewer overflow (SSO) reported — Montesano STP, Sep 16, 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 29c4bd5a-f8b6-46b2-8f0f-64568d9f32a4, the source gives no report time, retrieved 2026-11-06 06:01 UTC · Read the original notice

Read the original notice · Report an error

1. Reported wastewater outlet

Operator named in the record: Montesano STP (federal wastewater discharge permit, NPDES, WA0024660). Outlet: “Intersection Fleet St and W Spruce Ave, Montaseno”. 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 no water. No receiving water: the report names no water, only 'Ground'. The report is kept here but is not placed on a water and colours none on the map.

3. Estimated downstream stretch

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

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 16, 2026, 7:47 PM EDT

Ended

Sep 17, 2026, 2:33 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

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

Status in the record

Ended (as reported)

Material

“Partial Treatment - Other”

Volume

3,000 gallons (not stated whether estimated or measured)

Volume as reported

“3000 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

Source and versions

Source

Washington Ecology Sewage Spills list (RCW 90.48.636 public website)

Source record number

29c4bd5a-f8b6-46b2-8f0f-64568d9f32a4

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "row": {
    "objectid": 70,
    "globalid": "{29C4BD5A-F8B6-46B2-8F0F-64568D9F32A4}",
    "ecology_region": "Southwest",
    "start_date_and_time": 1789602420000,
    "permitee": "Montesano STP",
    "location": "Intersection Fleet St and W Spruce Ave, Montaseno",
    "county": "Grays Harbor",
    "initial_estimated_amount": "3000 gallons",
    "level_of_treatment": "Partial Treatment - Other",
    "potentially_impacted_area": "Ground",
    "end_event_timedate": 1789669980000,
    "final_event_duration_hours": "Unknown/Not Reported",
    "final_total_event_volume": "3000 gallons",
    "link_to_5_day_report": null,
    "event_type": "Sanitary Sewer Overflow_",
    "event_type_other": null,
    "erts_number": "750123",
    "was_the_spill_continuous": "Continuous"
  },
  "potentially_impacted_area": "Ground",
  "reached_water": false,
  "report_url": null,
  "erts_number": "750123",
  "county": "Grays Harbor",
  "duration_text": "Unknown/Not Reported",
  "continuous": "Continuous"
}