The Sasmuan Water District (SWD) was created by virtue of Sangguniang Bayan Resolution No. 17-s-90 dated June 4, 1990. After having satisfactorily complied with the basic minimum requirements prescribed by the Local Water Utilities Administration., Conditional Certificate of Conformance (CCC) No. 484 was awarded thereof pursuant to PD 198 as amended.

In 1994, the District was granted by a German financing agency, the Kreditanstalt Fur Wiederaufbau (KFW) with a deepwell capable of yielding 7.72 L/S (27.8 cum./h), a generator set, and a elevated storage tank with a capacity of 100 cubic meters. Apart from this, the pipelaying of 5,270 LM transmission lines with a diameter of 150 mm was also funded by KFW. The LWUA initially shouldered the labor component of this project including the provision of 500 new service connections which form part of the District’s loan with the World Bank.

However, in 1995 under the stewardship of the new elected Mayor of Sasmuan, the original composition of the 1990 Board of Directors was re-organized. Of the initial 5-member group, 3 were replaced 2 were retained. Due to the able support of the new set of Directors, the District was able to obtain a long term loan from LWUA in the amount of P 2.5 million. Using this funding support, management had an essay hand putting in-place the water supply system as schedule. And on June 10, 1997, or exactly seven (7) years after the issuance of CCC no. 484, the District officially started its service connection operations.

As June 29, 2013, the agency registered a total of 2941 concessionaires. SWD catered the servicing needs of ten (10) town proper and they are: Sto. Tomas, Sitio Sta. Cruz, San Nicolas 1st, San Nicolas 2nd, Sitio Remedios, Sta. Lucia, San Pedro, Sta. Monica, Sitio Cutud and San Antonio and two (2) coastal located at Malusac and Sebitanan.