| Business | Phone |
| Materials Analysis Co 2612 Elliott Dr, Troy 48083 | (248) 583-4165 |
| Western Slope Laboratory 1197 Rochester Rd, Troy 48083 | (248) 307-1168 |
| Reliable Analysis Inc 379 Indusco Ct, Troy 48083 | (248) 588-9770 |
| Express Testing Inc 1189 Chicago Rd, Troy 48083 | (248) 589-9543 |
| Midwest Testing Laboratories 1072 Wheaton Dr, Troy 48083 | (248) 689-9262 |
| Hammitt & Assoc Inc 1287 Combermere Dr, Troy 48083 | (248) 577-5801 |
| Mga Research 446 Executive Dr, Troy 48083 | (248) 577-5001 |
| Clarity 3310 W Big Beaver Rd, Troy 48084 | (248) 430-0223 |