MIEH 400 Lecture 5: Water Pollution and Water Borne DIsease

• School: University of Maryland
• Department: Maryland Institute for Applied Environmental Health
• Course: MIEH 400
• Professor: sapkota

Document Summary

Availability: 97. 5% of water is saltwater, 2. 5% fresh, 70% of freshwater is in mountain resources, 30% groundwater, . 3% lakes, rivers, etc, all water on earth: 99% unusable. Household: four basic needs: cooking, sanitation, washing, drinking, ~150 -200 gallons of water used per day in the usa, most used in mid-west. Water pollution: major environmental health concern. Cafo output: according to usda: ~8. 6 billion chickens (35. 5 bil lbs, ~110 mil hogs (23 bil lbs, ~1. 4 bil tons of waste. Waste reuse: minimal to no treatment of solid waste products. Industrial pollution: > 700 chemicals have been detected in us drinking water. Most frequent; antibiotics, insect repellant, bpa, phthalates, other plasticizers, cleaning products/detergent. Lead (latin = plumnum: (cid:862)dirty water(cid:863) and disease. Sources: can be bacterial, viral, or protozoan by nature. Surface water vs drinking water vs non-potable water vs well water vs etc etc etc. Who estimates that ~2 mil deaths occur annually from diarrheal diseases.