What is the address of Discovery Bay WWTP?

The address on the plant’s EPA facility record is Highway 4 And Channel Road, Discovery Bay, CA 94514, in Contra Costa County. Its coordinates are 37.8949, -121.5873. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Discovery Bay WWTP treat?

Discovery Bay WWTP treats an average of 1.08 MGD and is permitted for a design flow of 2.35 MGD.

What treatment technology does Discovery Bay WWTP use?

Klarifi has identified 3 treatment structures and unit processes at the Discovery Bay facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Discovery Bay WWTP?

The facility discharges under NPDES permit CA0078590, currently effective, expiring January 2030.

Is Discovery Bay WWTP in compliance?

Discharge monitoring reports show 5 violations at Discovery Bay WWTP in the last three years, 5 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Discovery Bay WWTP and how do I contact them?

Discovery Bay WWTP is a publicly owned treatment works in Discovery Bay, California. Klarifi lists 3 verified decision-maker contacts for this facility, available with a free trial.

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Discovery Bay WWTP

Highway 4 And Channel Road, Discovery Bay, CA 94514 · Contra Costa County · Publicly Owned Treatment Works

Average flow: 1.08 MGD

Design flow: 2.35 MGD

NPDES permit: CA0078590; Effective

Permit expires: January 2030

Population served: 7,200; CWNS 2022

Discovery Bay WWTP is a publicly owned wastewater treatment works in Discovery Bay, Contra Costa County, California treating an average of 1.08 million gallons per day against a permitted design capacity of 2.35 MGD, serving about 7,200 residents. It discharges under NPDES permit CA0078590 (effective), which expires in January 2030, with 5 recorded violations in the last three years.

Treatment technology

3 treatment structures and unit processes identified at Discovery Bay WWTP.

Available with a free Klarifi account

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

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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

3 verified contacts for Discovery Bay WWTP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Discovery Bay WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in California

Brentwood Wastewater Treatment Plant

Brentwood · 7 mi away

2.88 MGD

Mountain House WWTP

Mountain House · 8 mi away

1.42 MGD

Ironhouse Sd WWTP

Oakley · 9 mi away

2.81 MGD

City Of Tracy Waste Water Treatment Plant

Tracy · 13 mi away

9.33 MGD

Stockton Rwcf

Stockton · 14 mi away

28.94 MGD

Contra Costa Co San Dist 7a

Antioch · 16 mi away

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White Slough WPCF

Lodi · 17 mi away

—

Rio Vista WWTF

Rio Vista · 18 mi away

0.51 MGD

Discovery Bay 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 May 10, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms

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