Ryderwood STP
Ryderwood, WA · Cowlitz County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- 3604938991
- Effective
- Permit expires
- September 2029
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 7
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Ryderwood STP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Ryderwood STP — plus full compliance history and discharge data.
Try Klarifi freeData sourced from public EPA / NPDES records and Klarifi analysis. Last updated April 2025.