City Of Paso Robles Wastewater Treatment Facility
Paso Robles, CA · San Luis Obispo County · Publicly Owned Treatment Works
- Average flow
- 2.27 MGD
- Design flow
- —
- NPDES permit
- CA0047953
- Administratively continued
- Permit expires
- June 2026
- Population served
- 34,557
- CWNS 2022
City Of Paso Robles Wastewater Treatment Facility is a publicly owned wastewater treatment works in Paso Robles, San Luis Obispo County, California treating an average of 2.27 million gallons per day, serving about 34,557 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos. It discharges under NPDES permit CA0047953 (administratively continued), which expires in June 2026, with 17 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 17
- Effluent violations
- 17
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for City Of Paso Robles Wastewater Treatment Facility, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at City Of Paso Robles Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Paso Robles · 12 mi away
—
Morro Bay · 19 mi away
0.19 MGD
Morro Bay · 21 mi away
2.74 MGD
San Luis Obispo · 22 mi away
—
San Luis Obispo · 27 mi away
4.23 MGD
Avila Beach · 32 mi away
0.07 MGD
Pismo Beach · 35 mi away
0.93 MGD
Oceano · 38 mi away
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City Of Paso Robles Wastewater 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 September 11, 2026; facility record last updated March 27, 2025.