South San Luis Obispo Sd WWTP
1600 Aloha Place, Oceano, CA 93445 · San Luis Obispo County · Publicly Owned Treatment Works
- Average flow
- 2.25 MGD
- Design flow
- 5 MGD
- NPDES permit
- CA0048003
- Expired
- Permit expires
- March 2024
- Population served
- 62,019
- CWNS 2022
South San Luis Obispo Sd WWTP is a publicly owned wastewater treatment works in Oceano, San Luis Obispo County, California treating an average of 2.25 million gallons per day against a permitted design capacity of 5 MGD, serving about 62,019 residents. It discharges under NPDES permit CA0048003 (expired), which expires in March 2024, with 5 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at South San Luis Obispo Sd WWTP.
Available with a free Klarifi account
See the full treatment train at South San Luis Obispo Sd WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 5
- 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 South San Luis Obispo Sd WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at South San Luis Obispo Sd WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Pismo Beach · 3 mi away
1.01 MGD
Avila Beach · 8 mi away
0.07 MGD
San Luis Obispo · 11 mi away
5.6 MGD
San Luis Obispo · 16 mi away
0.76 MGD
Morro Bay · 22 mi away
—
Morro Bay · 26 mi away
0.26 MGD
Lompoc · 31 mi away
6.37 MGD
Paso Robles · 38 mi away
2.54 MGD
South San Luis Obispo Sd WWTP: 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 June 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms