International Boundary and Water Commission Transboundary Flow Reports

Please see Frequently Asked Questions for key terms and general information on Transboundary Flows.

2020 TRANSBOUNDARY FLOW REPORTS1

Start Date
End Date
Volume (Gallons)
Location
Type (A or B)
Reported Cause
Link to Report
12/29/2019
01/09/2020
1,036,007,958
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
01/13/2020
01/21/2020
435,803,450
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
01/24/2020
02/09/2020
826,993,241
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
02/13/2020
02/22/2020
433,831,602
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
02/25/2020
03/01/2020
147,746,364
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
03/01/2020
03/09/2020
503,241,000
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
03/16/2020
03/16/2020
20,196
Stewart's Drain
Not Applicable (Occurred During Wet Weather
Sudden Flow from Mexico
Available Upon Request2
03/23/2020
03/27/2020
454,997,000
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
03/30/2020
04/06/2020
544,751,000
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
04/06/2020
Reported as "Ongoing"
7,654,000,000
Tijuana River Main Channel
Not Applicable (Occurred During Wet Weather
Rainfall in the Tijuana River Basin
Available Upon Request2
04/16/2020
05/12/2020
1,666,210,000
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
05/03/2020
05/03/2020
33,600
Canyon del Sol
A
Flow from Mexico with Trash
Available Upon Request2
05/14/2020
05/15/2020
8,846,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
05/15/2020
05/16/2020
8,272,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
05/16/2020
05/18/2020
22,565,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
05/18/2020
05/21/2020
36,325,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
05/21/2020
05/22/2020
8,276,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
05/22/2020
05/31/2020
154,369,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
06/01/2020
06/29/2020
536,507,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2

2019 TRANSBOUNDARY FLOW REPORTS1

Start Date
End Date
Volume (Gallons)
Location
Type (A or B)
Reported Cause
Link to Report
01/01/2019
01/05/2019
38,800,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
01/18/2019
01/30/2019
610,000,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
02/08/2019
02/12/2019
313,500,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
02/24/2019
02/28/2019
390,200,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
02/28/2019
03/01/2019
89,200,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
03/05/2019
03/06/2019
93,600,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
03/11/2019
03/11/2019
152,300,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
03/19/2019
03/21/2019
123,000,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
03/26/2019
03/31/2019
83,300,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
04/06/2019
04/06/2019
500
Stewart's Drain
A
Sewage Backup in Mexico
Available Upon Request2
04/10/2019
04/11/2019
2,000,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
04/11/2019
04/11/2019
30,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
04/12/2019
04/12/2019
19,800
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
04/17/2019
04/17/2019
27,800,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
04/17/2019
04/17/2019
1,500,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
04/19/2019
04/24/2019
5,348,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
04/25/2019
04/25/2019
3,800,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
05/03/2019
05/05/2019
4,186,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
05/10/2019
05/13/2019
56,700,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
05/16/2019
05/17/2019
9,750,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
06/01/2019
06/01/2019
80,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
06/08/2019
06/08/2019
99,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
06/18/2019
06/18/2019
109,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
06/19/2019
06/20/2019
1,870,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
Available Upon Request2
06/23/2019
06/24/2019
399,000
Tijuana River Main Channel
B
Rupture of Sewage Collector in Mexico
Available Upon Request2
06/26/2019
06/28/2019
4,650,000
Tijuana River Main Channel
B
Rupture of Sewage Collector in Mexico
Available Upon Request2
07/01/2019
07/01/2019
65,000
Tijuana River Main Channel
B
Rupture of Sewage Collector in Mexico
Available Upon Request2
07/12/2019
07/12/2019
40,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
07/20/2019
07/21/2019
287,000
Tijuana River Main Channel
B
Electrical Malfunction at Pump Station CILA
Available Upon Request2
08/11/2019
08/11/2019
125,000
Tijuana River Main Channel
B
Break in the Tijuana Aqueduct
Available Upon Request2
09/04/2019
Reported as "Continues to Date"
94,030,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
09/11/2019
09/12/2019
3,830,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
09/13/2019
09/16/2019
16,036,547
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
09/26/2019
Reported as "Continues to Date"
926,621
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request2
09/29/2019
Reported as "Continues to Date"
7,800.000
Tijuana River Main Channel
B
Break in Potable Water Line
Available Upon Request2
10/12/2019
10/14/2019
14,497,873
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged
Available Upon Request2
10/21/2019
10/22/2019
9,219,399
Tijuana River Main Channel
B
Break in La Presa-Aguaje la Tuna Aqueduct
Available Upon Request2
11/18/2019
11/18/2019
3,739
Stewart's Drain
A
Sudden Flow from Mexico
Available Upon Request2
12/02/2019
12/03/2019
104,490,000
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2
12/11/2019
Reported as "Continues to Date"
54,610,000
Tijuana River Main Channel
B
Rainfall in the Tijuana River Basin
Available Upon Request2

1The information provided in the table is based on the currently available official transboundary flow reports. Additional transboundary flows for any period may be added to the table when the official transboundary flow reports become available.

2 Due to recent changes to State policy, the San Diego Water Board cannot post documents from outside organizations that are not compliant with the Americans with Disabilities Act (ADA). Please contact Mr. Keith Yaeger at Keith.Yaeger@waterboards.ca.gov to receive copies of the official transboundary flow reports.

2018 TRANSBOUNDARY FLOW REPORTS1

Start Date
End Date
Volume (Gallons)
Location
Type (A or B)
Reported Cause
Link to Report
01/29/2018
01/29/2018
208,000
Tijuana River Main Channel
B
Pump Station CILA Electrical Malfunction
02/04/2018
02/04/2018
100,000
Tijuana River Main Channel
B
Rupture of Potable Water Line in Mexico
02/09/2018
02/09/2018
561,000
Tijuana River Main Channel
B
Pump Station CILA Electrical Malfunction
02/10/2018
02/11/2018
664,000
Tijuana River Main Channel
B
Pump Station CILA Electrical Malfunction
02/20/2018
02/20/2018
304,000
Tijuana River Main Channel
B
Partial Shutdown of Pump Station CILA to Replace Electrical Equipment
02/25/2018
02/26/2018
1,185,000
Tijuana River Main Channel
B
Pump Station CILA Electrical Malfunction
03/05/2018
03/06/2018
1,500,000
Tijuana River Main Channel
B
Pump Station CILA Electrical Malfunction
03/06/2018
03/07/2018
63,000
Tijuana River Main Channel
B
Pump Station CILA Electrical Malfunction
10/19/2018
10/19/2018
1,640,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
11/21/2018
11/21/2018
2,240,000
Tijuana River Main Channel
B
Removal of Berm at International Border
11/25/2018
11/26/2018
7,900,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
12/11/2018
12/24/2018
147,600,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request1
12/28/2018
12/31/2018
47,900,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
Available Upon Request1

1Due to recent changes to State policy, the San Diego Water Board cannot post documents from outside the organization that are not compliant with the Americans with Disabilities Act (ADA). Please contact Mr. Keith Yaeger at Keith.Yaeger@waterboards.ca.gov to receive copies of the official transboundary flow reports.

2017 TRANSBOUNDARY FLOW REPORTS

Start Date
End Date
Volume (Gallons)
Location
Type (A or B)
Reported Cause
Link to Report
02/06/2017
02/23/2017
143,000,000
Tijuana River Main Channel
B
Rehabilitation of Sewage Collector in Mexico Resulted in Bypass to Tijuana River
03/01/2017
03/01/2017
145,000
Goat Canyon
A
Broken Pipe in Mexico
04/24/2017
04/24/2017
143,000
Tijuana River Main Channel
B
Pump Station CILA Power Failure
04/24/2017
04/24/2017
12,850
Stewart's Drain
A
Sewage Backup in Mexico Collection System
04/30/2017
05/01/2017
645,000
Goat Canyon
A
Broken Pipe in Mexico
05/21/2017
05/21/2017
1,560
Stewart's Drain
A
Rupture of Sewage Line in Mexico
05/21/2017
05/21/2017
400,000
Tijuana River Main Channel
B
Break in Force Main in Mexico Due to Auto Accident
05/24/2017
05/24/2017
3,800
Stewart's Drain
A
Sewage Backup in Mexico Collection System
05/25/2017
05/25/2017
335,000
Tijuana River Main Channel
B
Shutdown of Pump Station in Mexico
06/09/2017
06/09/2017
42,800
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
06/10/2017
06/10/2017
161,670
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
06/12/2017
06/12/2017
66,600
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
06/20/2017
06/21/2017
100,000
Yogurt Canyon/ Border Field State Park
B
Clogged Manhole in Mexico
06/27/2017
06/27/2017
5,500,000
Canyon del Sol
A
Broken Water Main in Mexico
07/31/2017
07/31/2017
1,720,000
Tijuana River Main Channel
B
Pump Station CILA Emergency Shutdown
08/07/2017
08/07/2017
311,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged
08/17/2017
08/17/2017
411,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged
09/09/2017
09/10/2017
3,900,000
Tijuana River Main Channel
B
Overflow of Water Tanks in Mexico
09/12/2017
09/13/2017
192,000
Tijuana River Main Channel
B
Pump Station CILA Level Sensor Malfunction
09/19/2017
09/19/2017
38,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged
10/06/2017
10/07/2017
4,152,000
Canyon del Sol
A
Broken Water Main in Mexico
10/11/2017
10/11/2017
80,800
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged
10/19/2017
10/19/2017
1,207,000
Canyon del Sol
A
Broken Water Main in Mexico
10/22/2017
10/22/2017
228,000
Tijuana River Main Channel
B
Overflow of Water Storage Tank in Mexico
12/11/2017
12/11/2017
223,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash

2016 TRANSBOUNDARY FLOW REPORTS

Start Date
End Date
Volume (Gallons)
Location
Type (A or B)
Reported Cause
Link to Report
01/16/2016
01/17/2016
6,620,000
Tijuana River Main Channel
B
Potable Water Line Break in Mexico
01/17/2016
01/19/2016
8,450,000
Tijuana River Main Channel
B
Potable Water Line Break in Mexico
01/19/2016
01/20/2016
2,080,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/20/2016
01/21/2016
2,090,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/21/2016
01/22/2016
1,600,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/23/2016
01/24/2016
2,170,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/23/2016
01/23/2016
720,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/24/2016
01/25/2016
1,440,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/25/2016
01/26/2016
940,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/26/2016
01/27/2016
480,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
01/28/2016
01/28/2016
2,238
Tijuana River Main Channel
A
Excess Flow from Mexico
01/29/2016
01/29/2016
690,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
02/12/2016
02/13/2016
370,000
Tijuana River Main Channel
B
Flow Exceeded Capacity of Pump Station CILA
04/05/2016
04/05/2016
4,860,000
Tijuana River Main Channel
B
Pump Station CILA Power Failure
06/30/2016
06/30/2016
440,000
Tijuana River Main Channel
B
Rupture of Potable Water Line in Mexico
07/02/2016
07/02/2016
1,320,000
Tijuana River Main Channel
B
Damage to Pump Station CILA
07/04/2016
07/04/2016
33,000
Tijuana River Main Channel
B
Damage to Pump Station CILA
09/05/2016
09/05/2016
390
Canyon del Sol
A
Pump Station CILA Intake Screens Clogged with Trash
09/08/2016
09/08/2016
690,000
Tijuana River Main Channel
B
Pump Station CILA Power Failure
10/26/2016
12/15/2016
920,000
Yogurt Canyon/ Border Field State Park
B
Collapsed Sewage Collector in Mexico
11/29/2016
11/29/2016
200,000
Goat Canyon
A
Broken Potable Water Main in Mexico

2015 TRANSBOUNDARY FLOW REPORT

Start Date
End Date
Volume (Gallons)
Location
Type (A or B)
Reported Cause
Link to Report
02/12/2015
02/12/2015
53,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged
02/14/2015
02/16/2015
172,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged
06/17/2015
06/17/2015
47,600
Tijuana River Main Channel
B
Pump Station CILA Power Failure
07/25/2015
07/27/2015
556,000
Tijuana River Main Channel
B
Manhole Backup in Mexico
07/31/2015
08/01/2015
846,400
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
08/02/2015
08/02/2015
2,165,930
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
08/03/2015
08/03/2015
1,592,945
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
08/06/2015
08/06/2015
437,465
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
08/08/2015
08/09/2015
109,366
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged with Trash
09/19/2015
09/22/2015
7,729,398
Tijuana River Main Channel
B
Pump Station CILA Breakdown
10/13/2015
10/13/2015
1,350,000
Tijuana River Main Channel
B
Pump Station CILA Loss of Pumping Capacity
10/14/2015
10/14/2015
1,240,000
Tijuana River Main Channel
B
Pump Station CILA Loss of Pumping Capacity
10/17/2015
10/18/2015
1,300,000
Tijuana River Main Channel
B
Pump Station CILA Loss of Pumping Capacity
11/19/2015
11/19/2015
1,310,000
Tijuana River Main Channel
B
Broken Potable Water Main in Mexico
12/11/2015
12/11/2015
2,060,000
Tijuana River Main Channel
B
Pump Station CILA Intake Screens Clogged