Download WHO ny Health risks around water cycle

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Health Risks Around the Water Cycle
Coasts and oceans
• sewage discharges and
pollution from rivers
• shellfish and fish contamination
• polluted bathing waters
• persistent organic pollutants
Climate change
• increased floods and droughts
• changing distribution
of insect disease vectors
• radioactive substances
Downstream
water-quality
• sewage pollution and
infectious diseases
• nutrients, eutrophication
and algal toxins
• chemical pollutants
Agriculture
• increased risk of disease
vectors (malaria and
schistosomiasis)
from unsafe irrigation
• irrigation with
unsafe wastewater
• agro-chemical
pollution of drinking
water sources
Urban areas, cities
and towns
• municipal sewage
• industrial pollution
• high demand for water
Freshwater scarcity
• insufficient water for basic needs
• degraded aquatic ecosystems
• loss of biodiversity
• lack of water for irrigation
and food production
• polluted runoff
• groundwater pollution
• poor quality drinking-water
World Health Organization
http://www.who.int/water_sanitation_health/
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