In certain settings, low-cost methods of providing water such as hand auguring or water jetting can be effective for remote areas. However, they often lack the necessary robustness and are limited by their inability to pass through shallow ground water into harder substrate and drill to depths past 30 meters. This creates many situations in which these techniques are ineffective at best, and dangerous at worst, as they often only drill into shallow water that is still contaminated.
Conversely, large drill rigs can drill 300+ meters through shallow ground water and hard substrate. However, these machines are limited in their ability to access remote communities connected by poor roads, which consequently limits their service to roughly 15-20% of the population in need. Additionally, the high cost of big rig drilling makes it prohibitively expensive for nearly all local populations.