Santa Rosa Water - Laguna Treatment Plant
Santa Rosa, CA · Sonoma County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 64 MGD
- NPDES permit
- CA0022764
- Expired
- Permit expires
- September 2025
- Population served
- 262,365
- CWNS 2022
Santa Rosa Water - Laguna Treatment Plant is a publicly owned wastewater treatment works in Santa Rosa, Sonoma County, California, serving about 262,365 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos. It discharges under NPDES permit CA0022764 (expired), which expires in September 2025, with 36 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
- 36
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Santa Rosa
Santa Rosa's capital improvement plan lists 14 water, sewer and wastewater line items worth $39M starting 2025–2028. The largest budgeted items are shown here.
All water and sewer capital projects in Santa Rosa →
| Project | Budget | Years |
|---|---|---|
| CIP Project Contingency | $9,348,000 | 2025–2029 |
| Llano Trunk Rehabilitation Phase 1 | $6,800,000 | 2025–2026 |
| Calistoga Rd Reconstruction- Montecito Blvd to Highway 12 | $6,396,103 | 2025–2025 |
| McMinn Ave and Hughes Ave Sewer, Water, and Storm Drain Improvements | $4,050,000 | 2025–2029 |
| Farmers Lane Water Treatment Plant Rehabilitation | $3,500,000 | 2025–2026 |
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
2 verified contacts for Santa Rosa Water - Laguna Treatment Plant, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Santa Rosa Water - Laguna Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Graton · 8 mi away
0.28 MGD
Forestville · 10 mi away
0.1 MGD
Windsor · 10 mi away
—
Windsor · 12 mi away
—
Guerneville · 15 mi away
0.35 MGD
Healdsburg · 16 mi away
0.75 MGD
Calistoga · 18 mi away
—
Sonoma · 19 mi away
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Santa Rosa Water - Laguna Treatment Plant: 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 May 10, 2025.