What is the address of San Mateo WWTF?

The address on the plant’s EPA facility record is 2050 Detroit Drive, San Mateo, CA 94404, in San Mateo County. Its coordinates are 37.5682, -122.2949. For some plants the record holds the utility’s mailing address rather than the plant gate.

What treatment technology does San Mateo WWTF use?

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

What is the NPDES permit for San Mateo WWTF?

The facility discharges under NPDES permit CAL037541, currently effective, expiring December 2030.

Is San Mateo WWTF in compliance?

Discharge monitoring reports show 105 violations at San Mateo WWTF in the last three years, 4 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates San Mateo WWTF and how do I contact them?

San Mateo WWTF is a publicly owned treatment works in San Mateo, California. Klarifi lists 12 verified decision-maker contacts for this facility, available with a free trial.

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San Mateo WWTF

2050 Detroit Drive, San Mateo, CA 94404 · San Mateo County · Publicly Owned Treatment Works

Average flow: —

Design flow: —

NPDES permit: CAL037541; Effective

Permit expires: December 2030

Population served: 155,584; CWNS 2022

San Mateo WWTF is a publicly owned wastewater treatment works in San Mateo, San Mateo County, California, serving about 155,584 residents. It discharges under NPDES permit CAL037541 (effective), which expires in December 2030, with 105 recorded violations in the last three years.

Treatment technology

3 treatment structures and unit processes identified at San Mateo WWTF.

Available with a free Klarifi account

See the full treatment train at San Mateo WWTF: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 105

Effluent violations: 4

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

Key contacts

12 verified contacts for San Mateo WWTF, with validated emails and direct phone numbers.

Unlock 12 verified contacts (9 more than shown)

Names, validated emails and direct phone numbers for decision-makers at San Mateo WWTF, plus the full compliance history and discharge data.

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San Mateo WWTF: 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 6, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms

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