For a complete sachet-water project, I would recommend choosing a consultant who can handle more than just selling the machine. You need assistance with:
Raw-water testing
Water-treatment system design — filters, RO if required, UV, tanks, pumps, etc.
Sachet-filling machine selection
Factory layout and construction requirements
FDA facility licensing and product registration
EPA environmental requirements
Water-source/borehole requirements
Laboratory testing and quality control
GMP/SOP documentation
Installation, commissioning and staff training