The National Irrigation Administration (NIA) is a government-owned and controlled corporation primarily responsible for irrigation development and management. It was created under Republic Act (RA) 3601 on 22 June 1963. Its charter was amended by Presidential Decree (PD) 552 on 11 September 1974 and PD 1702 on 17 July 1980. Both increased the capitalization and broadened the authority of the Agency.

NIA's forerunner was the Irrigation Division of the defunct Bureau of Public Works. NIA was placed under the Office of the President (OP) upon its creation. It was attached to the Department of Public Works, Transportation, and Communication under PD No.1, dated 23 September 1972. The issuance also integrated all irrigation activities under the Agency. The Administrative Code of 1987, dated 25 July 1987, attached NIA to both the Department of Public Works and Highways (DPWH), and Department of Agriculture (DA). But NIA remained attached to DPWH. It was transferred to OP pursuant to Executive Order No. 22, dated 14 September 1992. Then, it was attached to DA under Administrative Order No. 17, dated 14 October 1992.

Executive Order No. 165, Transferring the National Food Authority, National Irrigation Administration, Philippine Coconut Authority, and Fertilizer and Pesticide Authority to the Office of the President, 5 May 2014. Memorandum Order No. 70, Providing for the functions of the Presidential Assistant for Food Security and Agricultural Modernization, 5 May 2014.


The National Irrigation Administration in Region 2 is located along the Maharlika Road, Minante I, Cauayan City in the province of Isabela. It can be reached by an 8 hour ride from Manila and an hour flight to Cauayan Airport. Its operations is headed by a Regional Manager to oversee all project implementation in the five juridical areas of Batanes, Cagayan, Isabela, Nueva Vizcaya and Quirino comprising what is called the Cagayan Valley Region.

NIA-Region 2 is endowed with vast fertile land and abundant water resources that makes it ideal for agricultural production. For the past few years, the region has assumed the role as one of the major food supplier of Metro Manila and adjacent regions of Luzon. Cognizant to the role the region has assumed, the NIA-Region 2 consistently exerted efforts to develop more irrigation systems all over the region. Irrigation programs are focused on the rehabilitation of time-worn irrigation facilities and the construction of new systems to further boost productivity. To date, NIA-Region 2 has already covered around 57.84% of its potential irrigable area and shall exist to develop more irrigable areas to support and sustain the agricultural program of the government.