Heritage Ranch Csd
4870 Heritage Rd, Paso Robles, CA 93446 · San Luis Obispo County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.4 MGD
- NPDES permit
- CA0048941
- Expired
- Permit expires
- November 2022
- Population served
- 3,413
- CWNS 2022
Heritage Ranch Csd is a publicly owned wastewater treatment plant in Paso Robles, San Luis Obispo County, California, serving about 3,413 residents. It discharges under NPDES permit CA0048941 (expired), which expires in November 2022, with 17 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Heritage Ranch Csd.
Available with a free Klarifi account
See the full treatment train at Heritage Ranch Csd: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 17
- Effluent violations
- 14
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Heritage Ranch Csd, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Heritage Ranch Csd, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Paso Robles · 12 mi away
2.54 MGD
Morro Bay · 21 mi away
0.26 MGD
Morro Bay · 25 mi away
—
San Luis Obispo · 30 mi away
0.76 MGD
San Luis Obispo · 34 mi away
5.6 MGD
Avila Beach · 38 mi away
0.07 MGD
Pismo Beach · 43 mi away
1.01 MGD
Oceano · 45 mi away
2.25 MGD
Heritage Ranch Csd: 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 September 1, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms