| Business | Phone |
| Malden Code Enforcement 607 N Douglass St, Malden 63863 | (573) 276-2884 |
| Malden Lucy Lee Life Support 808 N Douglass St, Malden 63863 | (573) 000-1111 |
| Malden Power Plant 405 S Beckwith St, Malden 63863 | (573) 276-2357 |
| Malden Properties Malden Industrial Park, Malden 63863 | (573) 276-4751 |
| Malden Waste Water Plant Malden Airbase, Malden 63863 | (573) 276-3922 |
| Malden Waste Water Plant Rr 1, Malden 63863 | (573) 276-3920 |