Rio Grande Watermaster Program

About the Rio Grande Watermaster Program

In the Rio Grande basin, above Amistad, water rights are managed as a “first in time, first in right” stream as they are in other parts of Texas. Water rights in the Middle and Lower Rio Grande are served by the Falcon-Amistad system. Water below Amistad is allocated on an account basis, much like having a bank account with a constantly changing balance. Priority is given to all municipal accounts so, at the beginning of each year, each municipal account’s storage balance is set to the authorized water-right amount. The municipal priority is guaranteed by the monthly reestablishment of a municipal reserve in the system of 225,000 acre-feet. That is equivalent to one year’s average diversions for all municipal demands below Amistad for Texas users.

Irrigation accounts, on the other hand, are not reset each year and must rely on balances carried forward. Each month, a determination is made as to how much unallocated water assigned to the United States is within the Falcon-Amistad system. If surplus water is identified, it is allocated to irrigation accounts on a monthly basis. When water is used, it is subtracted from the respective account by type of use from the account’s usable balance. This system of accounting for water usage was put in place after an international treaty with Mexico was established and in accordance with a district court ruling of 1969.

Rio Grande Watermaster’s Office

Rio Grande Watermaster
1804 West Jefferson Avenue
Harlingen, TX 78550-5247
Voice: 956/425-6010
Fax: 956/412-5059
E-mail: R15RO@tceq.state.tx.us

Jurisdiction

River Basin Counties
Rio Grande Brewster, Cameron, Dimmit, Hidalgo, Hudspeth, Jeff Davis, Jim Hogg, Kinney, Maverick, Presidio, Starr, Terrell, Val Verde, Webb, Willacy, Zapata

Offers to Sell or Contract Water in the Rio Grande

In accordance with Section 49.504(2)(A) of Senate Bill 3, as passed by the 80th Texas Legislature, 2007, Regular Session, the following advertisement(s) to sell or contract for the use of water is posted for a period of 90 days:

  • The Harlingen Irrigation District has 2000 acre feet of Municipal use water available for sale/contract. Please contact Wayne Halbert, General Manager at (956) 423-7015 or (956) 873-2816, for more information.

This posting will close on March 31, 2008.

  • The Cameron County Irrigation District has 700 acre feet of Municipal use water available for sale/contract. Please contact Sonia kaniger, General Manager at (956) 399-2484, for more information.

This posting will close on April 7, 2008.