Police Station
| Deputy Commissioner of Police, Market Road | 044-26552794 |
| T6 Police Station, Nehru Bazaar Street | 044-26554750 |
| Women Police Station, TNHB, Avadi | 044-26553767 |
Fire Station
| Fire Service Station, TNHB, Avadi | 044-26555202 |
State Control Room
| Collectorate Control Room | 1077 , 044-27666746 |
| Collectorate Board | 044 – 27662451, 27662452, 27662453, 27662454 |
| Police Control Room | 100 |
| Accident Help Line | 108 |
| Fire and Rescue | 101 |
| Ambulance Help Line | 102 |
| Child Help line | 1098 |
| Disaster Help Line | 1077, 044 – 27664177 |
| Sexual Harassment | 1091 |
| BSNL Help Line | 1500 |