| Business | Phone |
| Cape Environmental Mgmt Inc 5400 Shawnee Rd 304, Alexandria 22312 | (703) 658-3070 |
| Center For Public Environ 815 King St, Alexandria 22314 | (703) 567-4104 |
| Chai 50 S Pickett St, Alexandria 22304 | (703) 370-0333 |
| Clean Sites Inc 228 S Washington St B30, Alexandria 22314 | (703) 519-2140 |
| Enviro Tech 6300 Stevenson Ave F, Alexandria 22304 | (703) 370-1617 |
| Environmental Risk Information 1421 Prince St, Alexandria 22314 | (703) 836-0402 |
| Total Environmental Concepts 3308 Mount Vernon Ave, Alexandria 22305 | (703) 567-4346 |
| Sciences International Inc 1800 Diagonal Rd 500, Alexandria 22314 | (703) 684-0123 |
| Seacor Environmental Svc Inc 1800 Diagonal Rd 500, Alexandria 22314 | (703) 518-9948 |
| Shaw Environmental/Infrstrctr 1725 Duke St 400, Alexandria 22314 | (703) 682-7900 |
| Rotondo Environmental Sltns 4950 Eisenhower Ave, Alexandria 22304 | (703) 212-4830 |
| Health Environment/Performance 220 S Washington St, Alexandria 22314 | (703) 548-0965 |
| Hillmann Environmental Co 6121 Lincolnia Rd 300, Alexandria 22312 | (703) 914-1135 |
| Environmental Design 6316 Grovedale Dr, Alexandria 22310 | (703) 719-9000 |
| Nsa-Great Tasting Water Co Po Box 10521, Alexandria 22310 | (703) 971-8172 |