Snoqualmie WWTP
Snoqualmie, WA · King County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- WA0022403
- Effective
- Permit expires
- June 2026
- Population served
- 12,534
- CWNS 2022
Snoqualmie WWTP is a publicly owned wastewater treatment works in Snoqualmie, King County, Washington, serving about 12,534 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit WA0022403 (effective), which expires in June 2026, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Snoqualmie
Snoqualmie's capital improvement plan lists 11 water, sewer and wastewater line items worth $30M starting 2025–2028. The largest budgeted items are shown here.
All water and sewer capital projects in Snoqualmie →
| Project | Budget | Years |
|---|---|---|
| Snoqualmie Mill Water Main Loop Project | $6,236,000 | 2025–2026 |
| 1040 Zone Reservoir Addition Project | $5,000,000 | 2028–2028 |
| 599 Zone Reservoir Addition Project | $4,117,000 | 2025–2028 |
| SR 202 Bridge Utility Main Replacement Project | $3,915,000 | 2025–2028 |
| Eagle Lake Water Reclamation Basin Improvement Project | $3,011,000 | 2025–2026 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
Decision-makers at Snoqualmie WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Washington
North Bend · 4 mi away
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Renton · 20 mi away
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Sultan · 22 mi away
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Seattle · 25 mi away
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Enumclaw · 26 mi away
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Seattle · 29 mi away
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Bainbridge Island · 32 mi away
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Port Orchard · 33 mi away
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Snoqualmie WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated November 29, 2025.