RST 242 Study Guide - Midterm Guide: Nonpoint Source Pollution, Septic Tank, Ozone Depletion

• School: University of Illinois
• Department: Recreation, Sport, and Tourism
• Course: RST 242
• Professor: Barkley

Document Summary

Non-point source: agricultural runoff, storm-water, atmospheric deposition, broadly scattered, difficult to regulate and control, still have water pollution because we don"t know how to deal with non-point. Most are biodegradable as it decomposes, it uses up dissolved o2 in water. Measure as bod, biochemical oxygen demand (typically 5 day) Raw sewage, paper mill discharge, food waste, dead animals: most of sewage treatment is focused on reducing bod. Dissolved o2 in water typically 8-12 mg/l. Water an hold more oxygen when colder. Amount of o2 required for biochemical decomposition process: microbial decomposition. Three zones: pollution zone, active decomposition zone, recovery zone. Outbreaks of waterborne diseases: milwaukee, wi cryptosporidium in 1993, (400,000 people) Fecal coliform bacteria (e. coli: standard measure, indicates decal material is present, these bacteria usually harmless, walkerton, on example of where cow manure got into dinking water 5 died, many sick. Still major problem despite 75 years of programs.