Underground Service Alert
| Company type | Nonprofit mutual benefit entity |
|---|---|
| Industry | Public utility / Excavation safety |
| Founded | 1975 |
| Headquarters | California , United States |
Area served | Northern California, Central California, Southern California, Nevada |
| Products | Excavation notification and communication services |
Underground Service Alert (USA) is a nonprofit mutual benefit entity that facilitates communication between the excavation sector and owners of underground utilities. It manages two distinct call centers located in California: Underground Service Alert of Northern California (USA North) and Underground Service Alert of Southern California (USA South), commonly referred to as DigAlert. Although governed by separate boards, both organizations share the common goal of encouraging safe excavation procedures. USA North serves Northern and Central California along with Nevada, while DigAlert covers nine counties in Southern California. These centers provide complimentary call services to homeowners, contractors, and excavators engaged in activities such as digging, trenching, blasting, drilling, grading, or other forms of earth disturbance.
Established in 1975 and officially incorporated as a mutual-benefit nonprofit in 1986, USA handles excavation notifications submitted by both public and private excavators. It distributes these notices to its members—comprising private firms and public agencies that own underground infrastructure. In response, members mark or stake their facilities, supply relevant information, or authorize the commencement of excavation work.