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Global Surface Water Source.

A surface water source includes all tributary streams and rivers, natural lakes and artificial reservoirs or impound.

1. Quantity of Water

The quantity of water at the source shall be:

  • Adequate to supply the treatment of water demand of the town or city.
  • Reasonable surplus for anticipated growth over a design period of 20 to 30 years.
  • Adequate to compensate for all losses.
  • Evaluated for quantity of treatment water dependability during drought.
  • Evaluated for impacts on downstream uses due to abstraction for the project.

2. Quality of Water

A sanitary survey and study should be made of factors, both natural and man made, which will affect quality. such survey and study shall include, but shall not be limited to:

  • Obtaining samples over a sufficient period of times to assess the biological, physical, chemical and radiological characteristics of the treatment water.
  • Assessing degree of hazard to the supply from upstream discharges and by accidental spillage of materials that may be toxic, harmful or detrimental to water  treatment process.

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