| Business | Phone |
| Fairfield City Public Works 1000 Webster St, Fairfield 94533 | (707) 428-7485 |
| Public Works Dept-Transit 1000 Webster St, Fairfield 94533 | (707) 428-7590 |
| Public Works-Engineering Dsgn 1000 Webster St, Fairfield 94533 | (707) 428-7475 |
| Public Works-Street-Drainage 420 Gregory Ln, Fairfield 94533 | (707) 428-7403 |
| Public Works-Traffic Engrng 1000 Webster St, Fairfield 94533 | (707) 428-7635 |
| Public Works-Water Treatment 2900 Vista Grande, Fairfield 94534 | (707) 428-7594 |
| Public Works-Water-Sewer Rpr 420 Gregory Ln, Fairfield 94533 | (707) 428-7415 |