Kalama Wastewater Treatment Plant
206 Hendrickson Dr, Kalama, WA 98625 · Cowlitz County · Publicly Owned Treatment Works
- Average flow
- 0.49 MGD
- Design flow
- 0.8 MGD
- NPDES permit
- WA0020320
- Administratively continued
- Permit expires
- November 2014
- Population served
- 2,707
- CWNS 2022
Kalama Wastewater Treatment Plant is a publicly owned wastewater treatment works in Kalama, Cowlitz County, Washington treating an average of 0.49 million gallons per day against a permitted design capacity of 0.8 MGD, serving about 2,707 residents. It discharges under NPDES permit WA0020320 (administratively continued), which expires in November 2014, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Kalama Wastewater Treatment Plant.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Kalama Wastewater Treatment Plant.
No verified contacts on file yet
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Ridgefield · 14 mi away
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Castle Rock · 18 mi away
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Vancouver · 20 mi away
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Toutle · 23 mi away
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Ryderwood · 28 mi away
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Cathlamet · 29 mi away
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Kalama Wastewater Treatment Plant: 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 October 26, 2026; facility record last updated November 20, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms