Sorry, you need to enable JavaScript to visit this website.

Title: Section 170.4 - Standards of raw water quality

170.4 Standards of raw water quality. Every source of water supply to which this Part is applicable shall meet the standards of quality hereinafter set forth and shall be protected from and free of contamination.
Items Specifications
1. Floating solids; settleable solids; None attributable to sewage, sludge deposits; tastes or industrial wastes or other wastes. producing substances
2. Sewage or waste effluents None which are not effectively disinfected.
3. pH Range between 6.5 and 8.5.
4. Dissolved oxygen For trout waters, greater than 5.0 parts per million; for non-trout waters greater than 4.0 parts per million.
5. Toxic wastes, oil, deleterious None alone or in combination with colored or other wastes other substances or wastes in heated liquids sufficient amounts or at such temperatures as to make the waters unsafe or unsuitable as a source of water supply for drinking,culinary or food processing purposes. Provided further, that the concentration or quantity of the constituents or characteristics hereinafter set forth shall not exceed the allowable limits established therefor.
Constituent or characteristic Allowable limits
Turbidity 5 units
Coliform organism 50 per 100 ml.
Inorganic chemicals (Concentration in mg/1)
Ammonia (NH3) <2.0
Arsenic (As) 0.05
Barium (Ba) 1.0
Boron (B) 1.0
CCE 0.2
Cadmium (Cd) 0.01
Chloride (C1) 250.
Chromium (Hexavalent) (Cr + 6) 0.05
Copper (Cu) <0.2
Cyanide (CN) <0.1
Fluoride (F) <1.5
Lead (Pb) 0.05
Mercury (Hg) 0.005
Nitrates (NO3) + Nitrates (NO2) 10.
Selenium (Se) 0.01
Silver (Ag) 0.05
Sodium (Na) <20.
Sulfate (SO4) 250.
Total dissolved solids 500.
Uranyl ion <5.0
Zinc (Zn) <0.3
Organic chemicals (Concentration in mg/1)
Organic nitrogen 0.5
Oxygen consumed 2.0
Phenols 0.001
Aldrin 0.017
Chlordane 0.008
DDT 0.042
Dieldrin 0.017
Endrin 0.001
Heptachlor 0.018
Heptachlor epoxide 0.018
Herbicides 0.1
Lindane 0.056
Methoxychlor 0.085
Organic phosphates + carbamates 0.1
Toxaphene 0.005
Radioactivity (Concentration in pc/1)
Gross beta 1000.
Radium--226 3.
Strontium--90 10.


VOLUME B (Title 10)