Assessment 6 – Water Use and Availability, Water Treatment, and Water Treatment Calculations

1. List five key attributes that support the use of chlorine for disinfection of water.

2. Between the water supply and when water is sent to storage and distribution, what are the six steps in conventional water treatment model?

3. You have been selected to serve as the water quality expert on a team of scientists supporting the restoration of a small village in a mountainous area of Chile, which has recently been devastated by an earthquake. The village sits at the base of a small watershed and a single stream flows through the hilly agricultural areas and then flows adjacent to the village. Downstream from the village the untreated water is pumped from the stream directly into the homes of the inhabitants. The surface water is influenced by agricultural runoff from crops and surface water runoff from a dairy farm prior to being pumped from the stream. Identify several specific stream pollutants of interest and present a plan for mitigating the threat to drinking water quality; describe specific treatment techniques and source mitigation.

Links:

Spellman (2014) Chapter 11 Water Treatment
• Spellman (2014) Chapter 12 Water Treatment Calculations
• US Environmental Protection Agency web resource – Water Treatment Process at http://water.epa.gov/learn/kids/drinkingwater/watertreatmentplant_index.cfm
• “Illinois Drinking Water -part 1 of 2” through Illinois Section American Water Works Association – video: http://youtu.be/vXom1ObYI5c
• “Illinois Drinking Water -part 2 of 2” through Illinois Section American Water Works Association – video: http://www.youtube.com/watch?v=jxJixqr4G2U

Additional Link:
In addition to the required course text the following public domain websites are useful. Please abide by the university’s academic honesty policy when using Internet sources. Note web site addresses are subject to change.

U.S. National Oceanic & Atmospheric Administration (NOAA) – www.noaa.gov/

USDA Water Quality Information Center – http://wqic.nal.usda.gov/

USGS Water Resources of the United States – http://www.usgs.gov/water/

U.S. EPA Water Science topics – http://www2.epa.gov/science-and-technology/water-science