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Wyoming Framework Water Plan - Living Rivers Home Page

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3.0 SETTING<br />

Table 3-9 Drinking <strong>Water</strong> Standards<br />

MAJOR IONS (mg/L)<br />

USEPA Maximum<br />

Contaminent Level<br />

Constituent (unit) Primary Secondary<br />

Chloride 250<br />

Fluoride 4 2<br />

Nitrogen, Nitrate+Nitrite as N 10<br />

Nitrogen, Nitrite as N 1<br />

Sulfate 250<br />

NON-METALS (mg/L)<br />

Cyanide 0.2<br />

PHYSICAL PROPERTIES<br />

Color (color units) 15<br />

Corrosivity (unitless)<br />

non-corrosive<br />

Odor (threshold odor number) 3<br />

pH (standard units) 6.5 - 8.5<br />

Total Dissolved Solids (mg/L) 500<br />

Surfactants (methylene blue active substances) 0.5<br />

METALS - TOTAL (mg/L)<br />

Aluminum 0.05 - 0.2<br />

Antimony 0.006<br />

Arsenic 0.01<br />

Barium 2<br />

Beryllium 0.004<br />

Cadmium 0.005<br />

Chromium 0.1<br />

Copper 1.3 1<br />

Iron 0.3 0.3<br />

Lead 0.015<br />

Manganese 0.05<br />

Mercury 0.002<br />

Nickel 0.1<br />

Selenium 0.05<br />

Silver 0.1<br />

Thallium 0.002<br />

Uranium 0.03<br />

Zinc 5<br />

RADIONUCLIDES - TOTAL (pico Curies per liter)<br />

Gross Alpha 15<br />

Gross Beta 50<br />

Radium 226 + Radium 228 5<br />

3-28

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