ENVIRONMENTAL HYGIENE Water: irrigation, application of pesticides and fertilizers, cooling, frost control, drinking water, cleaning of buildings, personal hygiene, etc Has the potential to be a direct source of contamination and a vehicle for spreading contamination rrigation water source and supplyENVIRONMENTAL HYGIENE – Water: irrigation, application of pesticides and fertilizers, cooling, frost control, drinking water, cleaning of buildings, personal hygiene, etc – Has the potential to be a direct source of contamination and a vehicle for spreading contamination – Irrigation water source and supply