Exhibit 21.1

Waters Corporation and Subsidiaries 12/31/2013   Waters Corporation (Delaware) Waters Technologies Corporation (Delaware) Waters Australia PTY LTD. Waters A/S (Denmark) Waters AG (Switzerland) Waters NV (Belgium) Waters Cromatografia SA (Spain) Waters SA de CV (Mexico) Waters Technologies do Brasil Ltda (Brazil) Waters Ges.MBH (Austria) Waters Kft (Hungary) Waters Sp.Zo.o (Poland) Waters OOO (Russia) Waters SAS (France) Waters SpA (Italy) Waters Sverige AB (Sweden) Waters Limited (Canada) TA Instruments-Waters LLC (Delaware) Environmental Resource Assoc., Inc. (Colorado) Waters India Pvt. Ltd. Esbee Wire Pvt. Ltd. (India) Waters Asia Limited (Delaware) Waters Korea Limited (Korea) Waters China Ltd. (Hong Kong) Waters Technologies (Shanghai) Ltd (China) Waters Pacific Pte Ltd (Singapore) Nihon Waters Limited (Delaware) Nihon Waters K.K. (Japan) TA Instruments Japan, Inc. (Japan) Waters Finance V LLC Microsep Proprietary Ltd (So. Africa) (24.5%)         Waters Technologies Corporation (continued) MM European Holdings LLP Milford International Limited Manchester International Limited Waters Realty Holdings Limited Melborne International Limited Waters Finance III LLC Waters Tech. Holdings Ltd (Ireland) Waters Celtic Holdings Ltd (Ireland) Waters Technologies Ireland Ltd (Ireland) Waters Chromatography Ireland Ltd (Ireland) Waters GmbH (Germany) Waters Srl (Romania) Expert Systems Solutions Srl (Italy) Waters (TC) Israel Limited (Israel) Waters Luxembourg SARL (Luxembourg)   Subsidiaries of Waters Luxembourg SARL   Micromass Holdings Ltd. (UK) Waters Chromatography BV (Netherlands) Waters Chromatography Europe BV (Netherlands) Waters Tech. LC-MS (Portugal) Unapessol Lda (Portugal) Micromass Ltd. (UK) Waters Limited (UK) Micromass UK Ltd. (UK)         Non-Linear Dynamics Limited (UK) PRA Europe Limited (UK)

* All subsidiaries are 100% owned unless otherwise indicated.