Monterey Regional WWTP
14811 Del Monte Blvd, Marina, CA 93933 · Monterey County · Publicly Owned Treatment Works
- Average flow
- 12.63 MGD
- Design flow
- 75.6 MGD
- NPDES permit
- CA0048551
- Effective
- Permit expires
- February 2030
- Population served
- 409,354
- CWNS 2022
Monterey Regional WWTP is a publicly owned wastewater treatment works in Marina, Monterey County, California treating an average of 12.63 million gallons per day against a permitted design capacity of 75.6 MGD, serving about 409,354 residents. It discharges under NPDES permit CA0048551 (effective), which expires in February 2030, with 5 recorded violations in the last three years.
Treatment technology
4 treatment structures and unit processes identified at Monterey Regional WWTP.
Available with a free Klarifi account
See the full treatment train at Monterey Regional WWTP: structures, unit processes and planned upgrades, with exact unit counts.
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
5 verified contacts for Monterey Regional WWTP, with validated emails and direct phone numbers.
Unlock 5 verified contacts (2 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Monterey Regional WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Watsonville · 13 mi away
5.28 MGD
Carmel · 14 mi away
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Gilroy · 23 mi away
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Scotts Valley · 27 mi away
0.49 MGD
Sunnyvale · 51 mi away
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Union City · 64 mi away
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Half Moon Bay · 65 mi away
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San Mateo · 66 mi away
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Monterey Regional 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 · Ozonation · Activated sludge · all terms