| Business | Phone |
| Transfer Station College Hwy, Southwick 1077 | (413) 569-0160 |
| Transfer Station Industrial Rd, Southwick 1077 | (413) 569-0160 |
| Southwick Accounting Dept 454 College Hwy, Southwick 1077 | (413) 569-5286 |
| Southwick Building Inspector 454 College Hwy, Southwick 1077 | (413) 569-1211 |
| Southwick Maintenance Dept 454 College Hwy, Southwick 1077 | (413) 569-3995 |
| Southwick North Boat Ramp 93 Point Grove Rd, Southwick 1077 | (413) 569-0513 |
| Southwick Nutrition Site 11 Depot St, Southwick 1077 | (413) 667-3333 |
| Southwick Selectmens Office 454 College Hwy, Southwick 1077 | (413) 569-5995 |
| Southwick South Boat Ramp 8 Berkshire Ave, Southwick 1077 | (413) 569-0514 |
| Southwick Town Lake Management 148 Berkshire Ave, Southwick 1077 | (413) 569-0515 |