| Business | Phone |
| Boschert Electric Inc 722 N 7th St, St Charles 63301 | (636) 949-9969 |
| Brookdale Electric St Charles 63301 | (636) 947-4409 |
| Wehmeier Electrical Svc 421 Longbow Trl, St Charles 63301 | (636) 723-4299 |
| Wibracht Electric Inc 1382 Charlestown Industrial Dr, St Charles 63303 | (636) 916-5450 |
| T & R Electric Inc 1720 Scherer Pkwy, St Charles 63303 | (636) 946-1022 |
| Pfaff Electric 19 Belle Plaine Dr, St Charles 63301 | (636) 724-3103 |
| Preferred Maintenance 2115 S Old Highway 94, St Charles 63303 | (636) 947-3781 |
| Montgomery Plumbing & Electric 1222 N 5th St, St Charles 63301 | (636) 940-7660 |
| J Bathe Electric 71 Triad South Dr, St Charles 63304 | (636) 498-0613 |
| Home Ech 10 Triad South Dr, St Charles 63304 | (636) 477-8444 |
| Gateway Electric Inc 4540 Towne Ct, St Charles 63304 | (636) 939-4426 |
| Dickherber Electric Inc 1708 S 5th St # 1, St Charles 63303 | (636) 946-6432 |
| Dalton Electric Inc 1008 S Benton Ave, St Charles 63301 | (636) 946-5610 |
| Chrisar Electric 21 Rodelle Woods Dr, St Charles 63304 | (636) 936-0143 |
| Circle C Electric Inc 5265 Westwood Dr, St Charles 63304 | (636) 936-0278 |