Michelson Treatment Plant
Irvine, CA · Orange County · Publicly Owned Treatment Works
- Average flow
- 6.99 MGD
- Design flow
- 28 MGD
- NPDES permit
- CA8000326
- Expired
- Permit expires
- June 2020
- Population served
- 120,986
- CWNS 2022
Michelson Treatment Plant is a publicly owned wastewater treatment works in Irvine, Orange County, California treating an average of 6.99 million gallons per day against a permitted design capacity of 28 MGD, serving about 120,986 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit CA8000326 (expired), which expires in June 2020, with 16 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 16
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Michelson Treatment Plant, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Michelson Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Fountain Valley · 6 mi away
77.37 MGD
Dana Point · 16 mi away
11.47 MGD
Long Beach · 17 mi away
4.44 MGD
Corona · 21 mi away
7.64 MGD
Cerritos · 21 mi away
—
Corona · 23 mi away
8.54 MGD
Chino · 23 mi away
6.4 MGD
San Pedro · 25 mi away
9.8 MGD
Michelson 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 March 27, 2025.