6. Bibliography

     1. AVA (2012, December 28). Statistics. Retrieved   

     from http://www.ava.gov.sg/AVA/Templates/AVA-GenericContentTemplate.aspx?
    

     2. Dai Lin, O. D. L. (2011, June 23). Students to get their feet wet learning at pub's river classroom.  

     TODAY. Retrieved from

     http://www.channelnewsasia.com/stories/singaporelocalnews/view/1136689/1/.html

     3. John, B. (2010, August 24). How to safely work with acids & bases. Retrieved from 

     http://www.ehow.com/how_6830859_safely-work-acids-bases.html

     4. (MEWR, 2000). Water quality. Retrieved 

     from website: http://www.nea.gov.sg/cms/ccird/pg_24_33.pdf

     5. MEWR (2012, August 1). Managing our  
     water, clean water policy. Retrieved from http://app.mewr.gov.sg/web/contents/Contents.aspx?
     Id=199

     6. PUB (2012, August 2). Local catchment water. 

     Retrieved from http://www.pub.gov.sg/water/Pages/LocalCatchment.aspx

     7. PUB (2013, January 11). The singapore water story.. Retrieved from 
     http://www.pub.gov.sg/water/Pages/singaporewaterstory.aspx

     8. PUB (2011, March 25). Water treatment. Retrieved 
     from http://www.pub.gov.sg/general/pages/watertreatment.aspx

     9. "Q" Values Charts
     • PathFinder, S. (2005, June 20). Biochemical oxygen demand. Retrieved from    
     http://www.pathfinderscience.net/stream/forms/WQI_BOD.pdf

     • PathFinder, S. (2005, June 20). Dissolved oxygen. Retrieved from 
     http://www.pathfinderscience.net/stream/forms/WQI_DO.pdf

     • PathFinder, S. (2005, June 20). Fecal coliform. Retrieved from 
     http://www.pathfinderscience.net/stream/forms/WQI_FC.pd†f

     • PathFinder, S. (2005, June 20). Nitrate. Retrieved from 

     http://www.pathfinderscience.net/stream/forms/WQI_Nitrate.pdf

     • PathFinder, S. (2005, June 20). ph values. Retrieved from 
     http://www.pathfinderscience.net/stream/forms/WQI_pH.pdf

     • PathFinder, S. (2005, June 20). Temperature . Retrieved from   
     http://www.pathfinderscience.net/stream/forms/WQI_Temp.pdf

     • PathFinder, S. (2005, June 20). Total dissolved solids. Retrieved from   
     http://www.pathfinderscience.net/stream/forms/WQI_DS.pdf

     • PathFinder, S. (2005, June 20). Phosphate. Retrieved from      
    http://www.pathfinderscience.net/stream/forms/WQI_Phos.pdf

     • PathFinder, S. (2005, June 20). Turbidity. Retrieved from   
    http://www.pathfinderscience.net/stream/forms/WQI_Turb.pdf

     • PathFinder, S. (2005, June 20). Water quality index worksheet. Retrieved from 
     http://www.pathfinderscience.net/stream/forms/WQI_worksheet.pdf

     • PathFinder, S. (2003, February 28). Water quality index protocol. Retrieved from 
     http://www.pathfinderscience.net/stream/cproto4.cfm

    10. Radford University, O. O. E. H. A. S. (2001, January 31).Corrosive 

    chemicals. Retrieved from http://www.radford.edu/fpc/Safety/HazCom/chp4.htm

    11. SDWA (2012, November 23).Aquatic science 
    centre at sungei ulu pandan. Retrieved from 
    http://www.sdwa.nus.edu.sg/index.php?option=com_content&view=article&id=119&Itemid=207

    12 Vernier, L. (2012.). Water quality with vernier. resource documents, Test 01-09 (Temperature,  
    pH, Turbidity, Total Solids,Dissolved Oxygen, Biochemical Oxygen Demand, Phosphates, 
    Nitrate and Fecal Coliform)

    13 Vernier. (2011, September 26). Sensors. Retrieved from
    http://www.vernier.com/products/sensors/