What is the address of Delleker WWTP?

The address on the plant’s EPA facility record is 73821 Industrial Way, Portola, CA 96122, in Plumas County. Its coordinates are 39.8055, -120.4965. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Delleker WWTP treat?

Delleker WWTP treats an average of 0.02 MGD and is permitted for a design flow of 0.1 MGD.

What treatment technology does Delleker WWTP use?

Klarifi has identified 2 treatment structures and unit processes at the Portola facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Delleker WWTP?

The facility discharges under NPDES permit CA0081744, currently expired, expiring July 2024.

Is Delleker WWTP in compliance?

Discharge monitoring reports show 816 violations at Delleker WWTP in the last three years, 37 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Delleker WWTP and how do I contact them?

Delleker WWTP is a publicly owned treatment works in Portola, California. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Delleker WWTP

73821 Industrial Way, Portola, CA 96122 · Plumas County · Publicly Owned Treatment Works

Average flow: 0.02 MGD

Design flow: 0.1 MGD

NPDES permit: CA0081744; Expired

Permit expires: July 2024

Population served: 585; CWNS 2022

Delleker WWTP is a publicly owned wastewater treatment works in Portola, Plumas County, California treating an average of 0.02 million gallons per day against a permitted design capacity of 0.1 MGD, serving about 585 residents. It discharges under NPDES permit CA0081744 (expired), which expires in July 2024, with 816 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Delleker WWTP.

Available with a free Klarifi account

See the full treatment train at Delleker WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 816

Effluent violations: 37

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

Decision-makers at Delleker WWTP.

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Nearby wastewater treatment plants in California

Portola WWTP

Portola · 1 mi away

—

Quincy Community Services District

Quincy · 25 mi away

0.5 MGD

Donner Summit WWTF

Soda Springs · 34 mi away

0.19 MGD

Susanville Sd WWTP

Susanville · 43 mi away

1.19 MGD

Cascade Shores WWTP

Nevada City · 44 mi away

0.01 MGD

Nevada City Wastewater Treatment Plant

Nevada City · 47 mi away

0.41 MGD

Chester WWTP

Chester · 52 mi away

—

Lake Wildwood WWTP

Penn Valley · 55 mi away

0.37 MGD

Delleker 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 March 9, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms

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