Orange County Sanitation District Plant 1
10844 Ellis Ave, Fountain Valley, CA 92708 · Orange County · Publicly Owned Treatment Works
- Average flow
- 99.43 MGD
- Design flow
- 332 MGD
- NPDES permit
- CA0110604
- Administratively continued
- Permit expires
- July 2026
- Population served
- —
- CWNS 2022
Orange County Sanitation District Plant 1 is a publicly owned wastewater treatment plant in Fountain Valley, Orange County, California treating an average of 99.43 million gallons per day against a permitted design capacity of 332 MGD. It discharges under NPDES permit CA0110604 (administratively continued), which expires in July 2026, with 0 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in January 2005.
Treatment technology
One treatment structure or unit process identified at Orange County Sanitation District Plant 1.
Available with a free Klarifi account
See the full treatment train at Orange County Sanitation District Plant 1: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Orange County Sanitation District Plant 1 in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $600M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jan 2005
Orange County Sanitation District
Judicial case · CWA, NPDES Discharge without a Permit · Final Order Entered · Compliance actions $600M
EPA's description of the case:
“'This is a Civil Judicial Referral pursuant to the CWA asking the Department of Justice to bring an action against the Orange County Sanitation District (OCSD). The violation involves a discharge at…”
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Source: EPA ECHO, civil enforcement case 09-2002-0140.
Full case history with a free Klarifi account
Every action against Orange County Sanitation District Plant 1 with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Fountain Valley
Fountain Valley's capital improvement plan lists 15 water, sewer and wastewater line items worth $28M starting 2024–2027. The largest budgeted items are shown here.
All water and sewer capital projects in Fountain Valley →
| Project | Budget | Years |
|---|---|---|
| Pipeline Replacement | $11,250,000 | 2024–2029 |
| Structural Improvements | $7,500,000 | 2024–2029 |
| Annual Meter Replacement | $6,000,000 | 2025–2029 |
| Water Conservation | $500,000 | 2024–2029 |
| AMI Software/License Fees | $464,815 | 2024–2029 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
13 verified contacts for Orange County Sanitation District Plant 1, with validated emails and direct phone numbers.
Unlock 13 verified contacts (10 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Orange County Sanitation District Plant 1, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Irvine · 6 mi away
2.6 MGD
Long Beach · 11 mi away
6.98 MGD
Carson · 21 mi away
154.69 MGD
Dana Point · 21 mi away
12.64 MGD
San Pedro · 22 mi away
0.0007 MGD
Pico Rivera · 23 mi away
8.87 MGD
Corona · 24 mi away
7.32 MGD
Chino · 25 mi away
10.94 MGD
Orange County Sanitation District Plant 1: 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 February 27, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms