Common water quality problems and their methods of treatment Page 2
D. Sense of Sight
Impurity or Contaminant | Symptom | Cause | Health Effects | Means of Treatment |
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Turbidity | Dirt, salt, clay. | Suspended matter in surface water pond, stream or lake. | Turbid water may contain disease causing microorganisms | "Calcite" or Neutralize (media) type filter - up to 50 ppm |
Sand grit, silt or clay substances. | Well sand from new well or defective well screen. | Turbid water may contain disease causing microorganisms | Sand trap and/or new well screen | |
Rust in water. | Acid water causing iron "pick-up." | Turbid water may contain disease causing microorganisms | Neutralizing calcite filter to correct low pH acidity and remove precipitated iron | |
Gray string-like fiber. | Organic mater in raw water algae, etc. | Turbid water may contain disease causing microorganisms | Constant chlorination followed by activated carbon filter to dechlorinate. | |
Acid water | Green stains on sinks and silver, porcelain bathroom fixtures. Blue-green cast to water. | Water which has high carbon dioxide content (pH below 6.8) reacting with brass and copper pipes and fittings. | Could lead to health effects if acid water causes leaching of lead and copper |
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Discolored water red, "Iron" water | Brown-red stains on sinks and other porcelain bathroom fixtures. Water turns brown-red in cooking or upon heating. Clothing becomes discolored. |
| Various effects |
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| Various effects |
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Brownish cast does not precipitate. | Iron pick-up from old pipe with water having a pH below 6.8. Organic (bacterial) iron. | Various effects |
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Reddish color in water sample after standing 24 hours. | Colloidal iron. | Various effects | Constant chlorination followed by activated carbon media filter dechlorination. | |
Yellow water | Yellowish cast to water after softening and/or filtering. | Tannins (humic acids) in water from peaty soil and decaying vegetation. | Various effects |
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Milky water | Cloudiness of water when drawn. |
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Very high chloride content in water | Blackening and pitting of stainless steel sinks and stainless ware in commercial dishwashers |
| Various effects |
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