| Business | Phone |
| Richardson Environmental Hlth 411 W Arapaho Rd, Richardson 75080 | (972) 238-4170 |
| Richardson Sanitation Dept 1260 Columbia Dr, Richardson 75081 | (972) 238-4050 |
| Richardson Sanitation Svc 1260 Columbia Dr, Richardson 75081 | (972) 744-4400 |
| Richardson Water Svc Dept 1260 Columbia Dr, Richardson 75081 | (972) 744-4111 |