Hyperion Treatment Plant
12000 Vista Del Mar, Playa Del Rey, CA 90293 · Los Angeles County · Publicly Owned Treatment Works
- Average flow
- 222.56 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 222.56 million gallons per day against a permitted design capacity of 450 MGD, serving about 2,800,773 residents. It discharges under NPDES permit CA0109991 (effective), which expires in April 2028, with 42 recorded violations in the last three years. EPA has recorded 4 formal enforcement actions naming the plant, the latest in March 2024.
Treatment technology
One treatment structure or unit process identified at Hyperion Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Hyperion Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Hyperion Treatment Plant in EPA's ICIS system.
- Formal actions
- 4
- 1 since FY2020
- Penalties assessed
- $635,900
- all cases
- Compliance actions
- $27M
- required by EPA orders
- EPA inspections
- 2
- latest Jun 2009
Latest case · Mar 2024
Hyperion WWTP Administrative order on consent
Administrative order · CWA, NPDES Permit Violations · Default Order, No Penalty · Compliance actions $27M
EPA's description of the case:
“Administrative order on consent regarding sanitary sewer overflow on July 11th, 2021. Order requires system upgrades.”
Source: EPA ECHO, civil enforcement case 09-2024-1502.
Full case history with a free Klarifi account
Every action against Hyperion Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
39 verified contacts for Hyperion Treatment Plant, with validated emails and direct phone numbers.
Unlock 39 verified contacts (36 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Hyperion Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Carson · 12 mi away
154.69 MGD
San Pedro · 15 mi away
0.0007 MGD
Los Angeles · 17 mi away
—
Malibu · 18 mi away
—
Van Nuys · 18 mi away
19.79 MGD
Burbank · 19 mi away
—
Long Beach · 21 mi away
6.98 MGD
Pico Rivera · 21 mi away
8.87 MGD
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 October 26, 2026; facility record last updated May 10, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms