| Business | Phone |
| Mendham Borough Offices 6 W Main St, Mendham 7945 | (973) 543-7152 |
| Mendham Emergency Operations 2 W Main St, Mendham 7945 | (973) 543-2290 |
| Mendham Sewer Plant Ironia Rd, Mendham 7945 | (973) 543-7030 |
| Mendham Borough Offices 2 W Main St, Mendham 7945 | (973) 543-7152 |