San Mateo Wastewater Treatment Plant Upgrade
Completed · California · Last reported Nov 2025
Source: Construction Dive
A $597 million upgrade of the wastewater treatment plant in San Mateo, California, replacing a 75-year-old system to eliminate sewer overflow issues and introduce advanced treatment technologies. The project includes one of the world's largest biological pre-treatment and clarifier systems, a 5.3-million-gallon underground flow equalization system, five-stage biological nutrient removal, membrane
- Status
- Closed
- Sector
- Water Supply and Storage, Waste Processing and Treatment, Commercial
- Location
- San Mateo, California, United States of America
- Updated
- 22 Jul 2026
- Source
- Construction Dive
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Project Information
Participants
Company |
Status
Original status | completed |
Taiyo status | Closed |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | A $597 million upgrade of the wastewater treatment plant in San Mateo, California, replacing a 75-year-old system to eliminate sewer overflow issues and introduce advanced treatment technologies. The project includes one of the world's largest biological pre-treatment and clarifier systems, a 5.3-million-gallon underground flow equalization system, five-stage biological nutrient removal, membrane bioreactor systems, a LEED Silver-certified administration building, and new public pathways and landscaping. |
Original sector | Water |
Budget |
Location
Country | United States of America (USA) |
State | California |
City | San Mateo |
Source
Source | Construction Dive |
URL |
More Details
Record type | Project |
Sector | Water Supply and Storage, Waste Processing and Treatment, Commercial |
Article published date | 2025-11-07 |
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