URAIS's main client is the Tarragona Water Consortium (CAT), with whom it has maintained a continuous collaboration since its creation in 2001. This collaboration has been formalized through various agreements and consolidated with the integration of the unit within CAT's facilities in 2007.
In addition to CAT, URAIS's regular clients (through collaboration agreements or service, advisory, and consulting contracts) include the following types of entities and companies:
- Drinking water supply companies
- Food industries
- Nuclear power plants or radioactive facilities
- Non-nuclear industries with raw materials or waste classified as NORM (Non-Mining Residues)
- Analytical laboratories
- Research centers and universities
- Municipalities
- Private individuals
