UAV	Unmanned Aerial Vehicle
PVC	Polyvinyl Chloride
TDS	Total Dissolved Solids
NTU	Nephelometric Turbidity Units
ppm	Parts Per Million
GPS	Global Positioning System
EPM	Electro-Permanent Magnet
RTC	Real-Time Clock
PCB	Printed Circuit Board
LED	Light-Emitting Diode
SD	Secure Digital (memory card)
WHO	World Health Organization
UN	United Nations
SDG	Sustainable Development Goal
MAPE	Mean Absolute Percentage Error