| Business | Phone |
| Public Works-Filtration Plant 391 Water St, Lawrence 1841 | (978) 794-5779 |
| Public Works-Pumping Station 400 Water St, Lawrence 1841 | (978) 794-5784 |
| Public Works-Water & Sewer Div 200 Common St # 204, Lawrence 1840 | (978) 794-5770 |
| Public Works-City Engineer 200 Common St # 201, Lawrence 1840 | (978) 794-5761 |
| Lawrence Public Works Dept 200 Common St # 201, Lawrence 1840 | (978) 794-5762 |
| Lawrence Public Works Dept 410 Water St, Lawrence 1841 | (978) 794-5781 |