| Index Components as of: 09/08/10 |  | |
 | ||
| Company Name | Symbol | % Weighting |
|---|---|---|
| Lindsay Corp | LNN | 5.35% |
| Veolia Environnement | VE | 4.80% |
| Aecom Technology Corp | ACM | 4.75% |
| Danaher Corp | DHR | 4.45% |
| Urs Corp | URS | 4.43% |
| Flowserve Corp | FLS | 4.39% |
| Roper Industries Inc | ROP | 4.38% |
| Badger Meter Inc | BMI | 4.35% |
| Tetra Tech Inc | TTEK | 4.29% |
| Valmont Industries Inc. | VMI | 4.28% |
| Itron Inc | ITRI | 4.00% |
| Ameron International Corp | AMN | 3.66% |
| Nalco Holding Co | NLC | 3.53% |
| Franklin Electric | FELE | 3.51% |
| Idex Corp | IEX | 3.25% |
| Watts Water Technologies'a' | WTS | 3.20% |
| Gorman-Rupp | GRC | 3.13% |
| Pall Corp | PLL | 3.12% |
| Insituform Technologies Inc | INSU | 3.00% |
| Itt Indus | ITT | 2.97% |
| Layne Christensen Co. | LAYN | 2.94% |
| Pentair, Inc | PNR | 2.91% |
| Calgon Carbon | CCC | 2.85% |
| Northwest Pipe | NWPX | 2.60% |
| Mueller Water Products Inc | MWA | 2.00% |
| Aqua America | WTR | 1.63% |
| Amer Water Works | AWK | 1.53% |
| Companhia de Saneamento Basico do Estado de Sao Paulo | SBS | 1.38% |
| Amer States Water | AWR | 1.35% |
| Consolidated Water Co. Inc. | CWCO | 1.06% |
| N.A. | MPR | 0.46% |
| N.A. | ERII | 0.44% |
| ||