What are the Sources of Fresh Water and How do they Vary in Composition?
Fresh water supplies may be either surface water (rivers, streams, reservoirs, etc.) or ground water (shallow or deep well waters). In general, ground water supplies are more consistent in composition and contain less suspended matter and trubidity than surface supplies which ar affected directly by rainfall, soil erosion, and trade wastes. On the other hand, ground waters are usually harder than surface waters. For example, an average surface supply will contain about 95 ppm total hardnessas opposed to an average of about 200 ppm total hardness for ground supplies. In some instances where the ground water is normally encountered in surface supplies.
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- What are the Sources of Fresh Water and How do they Vary in Composition?
