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Sierra <br /> FoothiH Laboratory <br /> Fact Sheet - Water Quality Guidelines <br /> The following table contains Secondary Drinking Water Standards. Water with contaminants above the <br /> levels listed below may not be acceptable to the consumer. The levels are set as guidelines for aesthetic <br /> purposes (taste, color, and odor) and not for human health risk. (Source: EPA 810-F-94-002) <br /> LEVELS OF: ABOVE: CAN CAUSE: <br /> Aluminum 0.05 - 0.2 m Discoloration of water <br /> Chloride 250 mg/L ..Salty taste; corrosion of pipes <br /> Color 15 color units Visible tint <br /> Copper 1.3 m Metalfic taste, blue/green staining of porcelain <br /> Corrosivitv_ non-corrosive Metallic taste; fixture staining, corroded pipes (corrosive <br /> water can leach pipe materials such as lead into drinking <br /> water <br /> Fluoride 2.0 mg/L Dental Fluorosis a brownish discoloration of the teeth <br /> Foaming Agents 0.5 m Aesthetic - Frothy, cloudy, bitter taste, odor <br /> Iron 0.3 mg/L Bitter metallic taste; staining of laundry, rusty color, <br /> sediment <br /> Manganese 0.05 mg/L Taste, staining of laundry, black to brown color, black <br /> staining <br /> Odor 3 threshold odor "Rotten egg," musty or chemical smell <br /> PH 6.5-8.5 Low pH - bitter metallic taste, corrosion <br /> High PH- Slippery feel, soda taste, deposits <br /> Silver 0.1 mg/L Argyria discoloration of skin), graying of eyes <br /> Sulfate 250 m Salty taste; laxative effects <br /> Total Dissolved Solids 500 mg/L Taste and possible relation between low hardness and <br /> cardiovascular disease; also an indicator of corrosivity <br /> (related to lead levels in water); can damage plumbing and <br /> limit effectiveness of soaps and detergents <br /> Zinc 5 mg/L Metallic taste <br /> HARDNESS TABLE: <br /> Hardness in terms of Hardness in terms <br /> milligrams her Gter(meL) or per gallon as( alciuen cs aa�4 <br /> Parts per meson as Calcium Carbonate <br /> ('drtlOn$te 1, <br /> 0-50 0-3 Extremely soft to soft <br /> 1-100 3-6 Soft to moderately hard <br /> 101-150 6-9 Moderately hard to hard <br /> 151-170 9-10 Hard to very hard <br /> 171-250 10-14 Very hard to excessively hard <br /> Over 250 over 14 Too hard for ordinary domestic use <br /> FAQ-QUAL.DOC Page- 1 <br /> 255 Scottsville Blvd. . PO Box 1268 •Jackson, CA 95642 209.223.2800 • Fax 223.2747 <br />