Issuing and Offering the Debenture of TTW

- Translation - No. TTW/0086/09 24 February 2009 Subject Notification of Issuance and Offering of Debentures to President The Stock Exchange of Thailand Thai Tap Water Supply Plc. ("the Company"), hereby informs you that the Company is in the process of issuing and offering Debentures of Thai Tap Water Supply Public Company Limited No. 1/2552 Tranche 1 Due B.E. 2555 ("Tranche 1") and Debentures of Thai Tap Water Supply Public Company Limited No. 1/2552 Tranche 2 Due B.E. 2557 ("Tranche 2") Debentures of Thai Tap Water Supply Public Company Limited No. 1/2552 Tranche 3 Due B.E. 2559 ("Tranche 3"), detailed as follows: Issuer : Thai Tap Water Supply Public Company Limited Type of Debentures : Unsubordinated and unsecured debentures in registered form with a debentureholders' representative Tenor : Tranche 1, 3 years from the Issue Date Tranche 2, 5 years from the Issue Date Tranche 3, 7 years from the Issue Date Issue Size : Tranche 1, 3,500,000 units Tranche 2, 1,700,000 units Tranche 3, 1,800,000 units Total issue size must not exceed 7,000,000 units Issuance Amount : Tranche 1, Value of Baht 3,500,000,000 Tranche 2, Value of Baht 1,700,000,000 Tranche 3, Value of Baht 1,800,000,000 Total issuance amount must not exceed Value of Baht 7,000,000,000 Par Value : Baht 1,000 Offering Price : Baht 1,000 Issue Date : February 26, 2009 Coupon Rate : Tranche 1, Fixed rate at 4.00% per annum until the maturity date Tranche 2, Fixed rate at 4.75% per annum until the maturity date Tranche 3, Fixed rate at 5.35% per annum until the maturity date Issue Credit Rating : "AA-" rated by TRIS Rating Company Limited Currently, the Office of the Securities and Exchange Commission approve the Company to issue such debentures. Therefore, the Company will offer the Debentures to general investors and institutional investors by opening for subscription during February 20-25, 2009. Please be informed accordingly Sincerely yours, (Sompodh Sripoom) Managing Director