Hyperion Treatment Plant
Playa Del Rey, CA · Los Angeles County · Publicly Owned Treatment Works
- Average flow
- 214 MGD
- Design flow
- 450 MGD
- NPDES permit
- CA0109991
- Effective
- Permit expires
- April 2028
- Population served
- 2,800,773
- CWNS 2022
Hyperion Treatment Plant is a publicly owned wastewater treatment works in Playa Del Rey, Los Angeles County, California treating an average of 214 million gallons per day against a permitted design capacity of 450 MGD, serving about 2,800,773 residents. Treatment on site includes clarifiers. It discharges under NPDES permit CA0109991 (effective), which expires in April 2028, with 42 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 42
- Effluent violations
- 30
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
39 verified contacts for Hyperion Treatment Plant, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Hyperion Treatment Plant, plus the full compliance history and discharge data.
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Los Angeles · 17 mi away
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Malibu · 18 mi away
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Van Nuys · 18 mi away
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Cerritos · 19 mi away
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Burbank · 19 mi away
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Long Beach · 21 mi away
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Hyperion 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 September 11, 2026; facility record last updated May 10, 2025.