City Of Ukiah Wastewater Treatment Plant
300 Plant Rd., Ukiah, CA 95482 · Mendocino County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 24.5 MGD
- NPDES permit
- CA0022888
- Expired
- Permit expires
- October 2023
- Population served
- 23,872
- CWNS 2022
City Of Ukiah Wastewater Treatment Plant is a publicly owned wastewater treatment works in Ukiah, Mendocino County, California, serving about 23,872 residents. It discharges under NPDES permit CA0022888 (expired), which expires in October 2023, with 12 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at City Of Ukiah Wastewater Treatment Plant.
Available with a free Klarifi account
See the full treatment train at City Of Ukiah Wastewater Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 12
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for City Of Ukiah Wastewater Treatment Plant, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at City Of Ukiah Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Willits · 23 mi away
1.01 MGD
Cloverdale · 24 mi away
—
Anchor Bay · 30 mi away
0.02 MGD
Mendocino · 36 mi away
0.09 MGD
Fort Bragg · 40 mi away
0.7 MGD
Healdsburg · 41 mi away
1.14 MGD
Windsor · 44 mi away
—
Guerneville · 44 mi away
0.31 MGD
City Of Ukiah Wastewater 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 October 26, 2026; facility record last updated March 27, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms