SubChapter C - Water Supply Sources

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Part 170 - Sources Of Water Supply

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Statutory Authority: 
Public Health Law, Section 1100

Section 170.1 - Statement

Section 170.1 Statement.

The rules contained in this Part, together with the watershed rules and regulations hereinbefore set forth in Parts 100 through 158, have been promulgated to protect sources of water supply dedicated for present or future public beneficial use for domestic and municipal purposes.

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Section 170.2 - Applicability and scope

170.2 Applicability and scope.

This Part shall apply throughout the entire State of New York, except the City of New York, and shall apply to all sources of water supply in the State and classified, under the authority of article 12 of the Public Health Law in Parts 701 through 703 of Title 6 of the Official Compilation of Codes, Rules and Regulations of the State of New York, as Classes AA, A, A--special (International boundary waters), AA--special (Lake Champlain drainage basin), AA--special (upper Hudson River drainage basin) and GA.

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Section 170.3 - Definitions

170.3 Definitions. As used in this Part, the following words and phrases shall have the following meanings:

(a) Potable water means water suitable for drinking, culinary or food processing purposes.

(b) Protected from contamination includes, in addition to responsibility for the prevention of contamination, responsibility for the reservation, surveillance, storage, diversion, collection, treatment, processing, distribution and use of water for domestic and municipal purposes.

(c) Source of water supply means any ground water, aquifer, surface water body or water course from which by any means water is regularly taken either periodically or continuously for drinking, culinary or food processing purposes or which has been classified for present or future public beneficial use as a source for domestic or municipal purposes.

(d) Contamination means any substance or characteristic which will make the water unsuitable or unsafe including a constituent or characteristic in an amount exceeding the allowable limits therefor hereinafter set forth.

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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.

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