Attch. 25 Tijuana wastewater flow diagram Oct 2025.pdf
PDF 292 KB Posted
- Attached to
- Operation & Maintenance of the South Bay Wastewater Treatment Plant Federal contract opportunity
- Solicitation number
- FY26OMSBIWTP
About this file
This diagram depicts the estimated wastewater flows for the City of Tijuana, Baja California, showing the complex collection and treatment system as of October 2025. The diagram illustrates multiple wastewater treatment plants, pumping stations, and collectors, with flow rates measured in liters per second (LPS) and million gallons per day (MGD), including the South Bay International WWTP, San Antonio de los Buenos WWTP, and various collectors and pumping plants along the Tijuana River and near the international border between the USA and Mexico.
Key flow details include the South Bay International WWTP processing 1500 LPS (35 MGD), the Border Junction Box handling 1500 LPS, and multiple smaller collectors and pumping stations contributing flows ranging from 7 to 400 LPS. The system ultimately discharges 2055 LPS (47 MGD) to the Pacific Ocean, with river flows estimated between 1500-1900 LPS. The diagram provides a comprehensive overview of the wastewater infrastructure, showing interconnections between different treatment facilities, collectors, and discharge points across the Tijuana urban area.
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Text version
South Bay International
WWTP
Alamar River
PBCILA
1A
PB1
3000 LPS
1B
900 LPS
1500 LPS
X
Tijuana River
X
Border
JB
1500 LPS
1500 LPS
35 MGD
New International Collector
Oriente Collector
275 LPS
325 LPS
C.S. Taboada
C. Central
C. Castillo C.V. Carranza
400 LPS
1100 LPS
PB
Playas
Smuggler's PS 228 LPS C. Mirador 13 LPS C. Laureles 14 LPS Aport. Lazaro C. 7 LPS Twin Lines 70 LPS Total- 332 LPS
SAB
Pretreatment
800 LPS
18 MGD
San Antonio de los Buenos
WWTP
1947 LPS 800 LPS
Torre la Cuspide
1832 LPS
Laureles
II
28LPS
87 LPS
Arroyo Tecolote-La Gloria
108 LPS
Discharge to Pacific Ocean
2055 LPS
47 MGD
River flow 1500-1900
LPS
5 MGD
220 LPS
City of Tijuana, Baja California
Estimated wastewater flows from collection system and from Tijuana River
LPS- liters per second MGD- million gallons per day PB- pumping plant JB- junction box
October 2025
1500 LPS
South Bay Ocean Outfall
800 LPS
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