Water Quality and Pollution Types of Water Pollution

Water Quality and Pollution

Types of Water Pollution § Point Source Pollution – contaminants have an identifiable source § Smokestacks, car tailpipe § Nonpoint Source Pollution § Contaminant source cannot be found § Several farmlands in the same area

NPS get trapped in the water system and travels long distances § 96% of water pollution is from non-point sources

Major Sources of Water Pollution § Agriculture: by far the leader § Pesticides, fertilizers § Industrial: factories and powerplants § Mining: surface mining toxics, acids, sediment

Video Questions § What are the main sources of nonpoint pollution? § What are some examples of nonpoint source pollutants? § What are some effects of these pollutants? § What are some ways to control this pollution? https: //www. youtube. com/watch? v=Wf. Km. Hl-45 ls

Complete the nonpoint/point source pollution worksheet with partner.

Wastewater Treatment Plants § Water goes to a treatment plant after it is flushed § Not all harmful substances are removed § Industrial wastewater and storm runoff contain toxic substances that aren’t removed

https: //www. youtube. com/watch? v=YMD 8 gb 4 f. TJk

Physical Properties of Water § Water Temperature § Total Dissolved Solids. Combined living and non-living substances dissolved in water § Agriculture § Point Source Pollution § Discharge from sewage treatment plants § Total Suspended Solids-Living and non-living substances suspended in water

Chemical Properties of Water § p. H-Measurement of the hydrogen concentration in water § p. H above 7 = Basic § p. H below 7 = Acidic § Dissolved Oxygen-Amount of oxygen dissolved in water § Low oxygen levels can kill ecosystems

Biotic Index § Biotic Index-Indicates the types of organisms present in an environment § Used to measure water quality of a stream or river § Measures from 1 -10. (Excellent, Good, Fair or Poor)

Eutrophication • Excess nutrients in the water that can cause explosive plant growth • When many plants die, they produce a toxin (red algae) • Decaying plants also reduce the amount of oxygen in the water • Plant growth (like algae) can suffocate other life in a lake or pond.

Waterborne Disease • Number one killer of children worldwide • About 80% of all diseases are water-related (WHO) • Often due to water infiltrated with sewage, spreading disease • Bacteria, virus, or protozoa are responsible –can’t be seen, smelled, or tasted and can be in “clean looking” water • Improvements in disposal and treatment have reduced number of illness in developed nations

http: //abcnews. go. com/2020/video/childrenkilled-waterborne-disease-12428233

Thermal Pollution • Power plants and industries use water in the cooling systems and then discharge the warm water directly into a lake or river • This decreases the amount of oxygen present and aquatic organisms and fish die

Groundwater Pollution • Not as polluted as surface water but harder to clean up • Why? Pollution sticks around- very cold, no bacterial breakdown • Very slow water movement- can take 1001, 000 years • Pollutants can stick to rocks in aquifer and pollute new water

What Pollutes Groundwater?

Sources of Groundwater pollution. . . • • • landfills leaky underground storage tanks mines septic tanks hazardous waste - deep well injection any pollutant in runoff that percolates

Video directions Follow along and answer the questions provided. https: //www. youtube. com/watch? v=mk. Bo. Vfk. OWq. Q