Culligan of Port Huron, MI services all or portions of:
48001 – Algonac, MI; 48004 – Anchorville, MI; 48401 – Applegate, MI; 48006 – Avoca, MI; 48064 – Casco, MI; 48063 – Columbus, MI; 48022 – Croswell, MI; 48054 – East China, MI; 48023 – Fair Haven, MI; 48059 – Fort Gratiot, MI; 48027 – Goodells, MI; 48028 – Harsens Island, MI; 48032 – Jeddo, MI; 48450 – Lexington, MI; 48039 – Marine City, MI; 48040 – Marysville, MI; 48049 – North Street, MI; 46060 – 46061 – Port Huron, MI; 48074 – Smiths Creek, MI; 48079 – St. Clair, MI; 48097 – Yale, MI and surrounding areas