| Business | Phone |
| Clarke Mosquito Control 151 W Marshall St # 3, Norristown 19401 | (610) 270-8805 |
| Ensco Enpak Inc 2550 Industry Ln, Norristown 19403 | (610) 630-6099 |
| Environmental Consulting Inc 500 E Washington St # 375, Norristown 19401 | (610) 279-7070 |
| Organica Biotech 705 General Washington # 500, Norristown 19403 | (610) 539-8300 |
| Mass Technology Corp Norristown 19401 | (610) 275-6146 |