TABLE IV-1. Key Water Quality Criteria for Farmstead Uses. 



Characteristic 



Recommendations (at point of use) 



General farmstead uses 



Additional special-use requirements 



Page 



Taste and odor 



Color 



pH 



Total dissolved inorganic solids 



Substantially free 



do 



6.0 to 8.5 



500 mg/l (under certain circum- 

 stances, higher levels are 

 acceptable). 



Dissolved organic compounds No recommendations for total 



organ ics. 



The concentration of persistent 

 chlorinated organic pesticides 

 should not exceed the follow- 

 ing: 



Compound /xg/l 



Endrin 1 



Aldrin 17 



Dieldrin 17 



Lindane 56 



Toxaphene 5 



Heptachlor 18 



H. epoxide 18 



DDT 42 



Chlordane 3 



Methoxychlor 35 



Substantially free 



Levels in excess of those shown 



are grounds for rejection of a 



supply: 



Substances mg/l 



Arsenic 0.05 



Barium 1.00 



Cadmium 0.01 



Chromium 0.05 



Cyanides 0.2 



Lead 0.05 



Selenium 0.01 



Silver 0.05 



Levels shown below should not be 



exceeded if alternate sources 



are available: 



Substances mg/l 



Manganese 0.05 



Iron 0.3 



Copper 1.0 



Zinc 5.0 



Fluoride 0.7-1.2 



Nitrate 45.0 



6.8 to 8.5 dairy sanitation. 



124 

 124 

 124 

 124 



124 



Turbidity 



Hazardous trace elements 



125 

 125 



Other trace elements. 



In dairy sanitation, water should 

 contain <20 mg/l potassium 

 and <0.1 mg/l iron and copper. 



Radionuclides 



Nonpathogenic microorganisms. 



pc/l 



.Strontium-90 10 



Radium-226 3 



In absence of above radionu- 

 clides, 1,000 pc/l gross /3 

 activity. 

 -To conform to USPHS drinking 

 water standards. 



For dairy sanitation, water should 

 not contain more than 20 orga- 

 nisms per ml and contain not 

 more than 5 lypolytic and/or 

 proteolytic organisms per ml. 



125 

 125 



125 



116 



