• Calgon Carbon Corporation 4.91% ( Filtration )


• Consolidated Water Co. Ltd. 4.37% ( Water Utility )


• Insituform Technologies Inc. 4.34% ( Pipeline installation and repair)


• Companhia De Saneamento Basico Do Estado De Sao Paulo 4.26% ( Water and Wastewater Utility )


• Pentair, Inc 4.24% ( Pump s, motors, Filtration , Water Tank s)


• Southwest Water Co. 4.13%


• California Water Svc Grp 4.08%


• Pall Corporation 4.07% (filtration)


• Watts Water Technologies 'a' 3.97% (valves)


• Amer States Water 3.93%


• Aqua America 3.92%


• Millipore Corporation 3.87% (filtration)


• United Utilities PLC 3.86%


• ITT Industries 3.82% (pumps)


• Franklin Electric 3.80% (pumps and motors)


• Nalco Holding Co. 3.55%


• Layne Christensen Co. 3.49%


• Danaher Corp 3.16%


• Idexx Laboratories 3.14%


• Lindsay Manufacturing Co. 2.51% ( Center Pivot Irrigation systems)


• Badger Meter 2.41% (flowmeters)


• Synagro Tech 2.21%


• Veolia Environnement 2.18%


• Tetra Tech 2.13%


• Urs Corp 2.09%


• Valmont Industries Inc. 2.05% ( Center Pivot Irrigation systems)


• Itron Inc 1.16%


• Flowserve Corp 1.08% (pumps)


• SUEZ -ADR 0.98%


• Ashland, Inc. 0.96%


• Idex Corp 0.96%


• Roper Industries 0.93% (appliances, pumps, industrial controls)


• Emerson Electric 0.92% (pump motors and flowmeters)


• Siemens AG Ads 0.90%


• General Electric 0.81% (appliances, motors)


• 3M Co.

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