Groundwater Reliability Improvement Project - Advanced Water Treatment Facility
4320 San Gabriel River Parkway, Pico Rivera, CA 90660 · Los Angeles County · Publicly Owned Treatment Works
- Average flow
- 8.87 MGD
- Design flow
- 14.8 MGD
- NPDES permit
- CA0064645
- Effective
- Permit expires
- January 2029
- Population served
- —
- CWNS 2022
Groundwater Reliability Improvement Project - Advanced Water Treatment Facility is a publicly owned wastewater treatment works in Pico Rivera, Los Angeles County, California treating an average of 8.87 million gallons per day against a permitted design capacity of 14.8 MGD. It discharges under NPDES permit CA0064645 (effective), which expires in January 2029, with 579 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Groundwater Reliability Improvement Project - Advanced Water Treatment Facility.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 579
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Pico Rivera
Pico Rivera's capital improvement plan lists 3 water, sewer and wastewater line items worth $12M starting 2024–2026. The largest budgeted items are shown here.
All water and sewer capital projects in Pico Rivera →
| Project | Budget | Years |
|---|---|---|
| Water Main Improvements | $7,671,000 | 2024–2026 |
| Storage Tanks | $3,490,000 | 2024–2025 |
| Water Facility Improvements | $500,000 | 2026–2027 |
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
Decision-makers at Groundwater Reliability Improvement Project - Advanced Water Treatment Facility.
No verified contacts on file yet
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Nearby wastewater treatment plants in California
South El Monte · 2 mi away
10.72 MGD
Long Beach · 14 mi away
6.98 MGD
Los Angeles · 15 mi away
—
Pomona · 16 mi away
—
Burbank · 19 mi away
—
Carson · 19 mi away
154.69 MGD
Playa Del Rey · 21 mi away
222.56 MGD
Chino · 23 mi away
10.94 MGD
Groundwater Reliability Improvement Project - Advanced Water Treatment Facility: 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 April 12, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms