Record date and Book closing date for interest payment

TTW/0347/2009 July 28, 2009 Subject: Notification of the record date and book closing date for interest payment of the Company's debentures TTW122A, TTW142A and TTW162A Attention: President The Stock Exchange of Thailand Refer: The Letter No. SSO.SS&IB0.09/3088 of TMB Bank Plc. dated July 27, 2009 re: Scheduled closing the registered for Thai Tap Water Supply Public Company Limited. Thai Tap Water Supply Public Company Limited ("the Company") would like to informs you the record date and the book closing date for interest payment of the Company's debentures, TTW122A, TTW142A and TTW162A. The details are shown in the reference letter. Please be informed accordingly, Yours faithfully, (Sompodh Sripoom) Managing Director Accounting and Finance Division. 02-8117526 ext. 304 SSO.SS&IBO.09/3088 July 27, 2009 RE: Scheduled closing the registered for Thai Tap Water Supply Public Company Limited. President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of THE SUBORDINATED DEBENTURES OF THAI TAP WATER SUPPLY PUBLIC COMPANY LIMITED NO.1/2009 SERIES 1 DUE 2012 (TTW122A) and SERIES 2 DUE 2014 (TTW142A) and SERIES 3 DUE 2016 (TTW162A) would like to announce that the closing date of the registration of interest payment of the above debentures for period # 1 is on August 13,2009 and the interest payment will be on August 26, 2009. Details are as follows: Name Interest Rate ( % ) Period Days TTW122A 4.00 February 26, 2009 to August 25, 2009 181 TTW142A 4.75 February 26, 2009 to August 25, 2009 181 TTW162A 5.35 February 26, 2009 to August 25, 2009 181 Yours faithfully, TMB Bank Public Company Limited. ( Miss Poonsri Solgosoom ) Authorized Signature Registrar and Paying Agent Investor Services Operations Division Tel. 0-2230-5487, 0-2230-6061