This dataset includes 135 thousands contractor licenses registered with Washington State Department of Labor & Industries.
| Contractor Name | Principal | Office Address | Effective Date |
|---|---|---|---|
| Calgon Carbon Corporation | Coccagno, James A | 3000 Gsk Drive, Moon Township, PA 15108 | 2016-03-18 |
| N A Water Systems LLC | C T Corp Systems | 250 Airside Drive, Moon Township, PA 15108-2793 | 2005-04-25 |