Current through Register Vol. 48, No. 12, March 22, 2024
a) Source. A
supply of water in compliance with this Section shall be provided to any
residential dwelling subject to this Part. The source of water serving a
semi-private water supply, including water supplied to employees, or the source
of any water supply, when made accessible to the public for drinking, cooking
or washing purposes, shall be obtained from one of the following:
1) a public water supply;
2) a water well which is located and
constructed in accordance with the Illinois Water Well Construction Code (77
Ill. Adm. Code 920) and Illinois Water Well Pump Installation Code (77 Ill.
Adm. Code 925);
3) a surface water
supply constructed in accordance with the Surface Source Water Treatment Code
(77 Ill. Adm. Code 930) or in compliance with "Ten States Standards" (1982
Edition - Health Education Service, P.O. Box 7283, Albany, New York, 12224) for
potable water;
4) a hauled water
supply utilizing a public water supply as the source. All water must be hauled
in a tank protected against contamination and used only for this purpose. In an
emergency, equipment used for handling other potable materials, such as milk
and syrup, may be used after cleaning and disinfection with a solution of not
less than one hundred parts per million of free chlorine. A watertight holding
tank protected against possible entry of contamination is required and if any
portion is below ground, location with respect to sources of contamination must
be the same as for a well source. Required distances from sources of
contamination to a well are found in Section
920.50 of the Illinois
Water Well Construction Code (77 Ill. Adm. Code 920).
Transfer of the water from the hauling tank must be in a manner
which will not result in contamination.
b) Maximum Contaminant Levels. Any water
supply, excluding public water supplies, when the water will be made accessible
to the public, including potable water supplied to employees, shall meet the
nitrate, turbidity, and bacteriological requirements contained in subsections
(b)(1), (2), and (3).
1) Semi-Private Water
Supply. Any semi-private water supply serving a resident population shall meet
the requirements for inorganic chemicals, synthetic organic chemicals, and
volatile organic chemicals contained in subsections (b)(5), (6), and (7),
respectively, as well as the overall requirements of subsections (b)(1), (2),
and (3).
2) Nitrates/Nitrites.
A) The maximum contaminant level for nitrate
shall not exceed 10 milligrams per liter as nitrogen. Nitrate levels not to
exceed 20 milligrams per liter as nitrogen may be allowed if the supplier of
water demonstrates that:
i) the water will not
be available to children under 6 months of age; and
ii) there will be continuous public
notification stating nitrate levels exceed 10 milligrams per liter as nitrogen
and describing the potential effects of the contaminant exposure on public
health.
B) The maximum
contaminant level for nitrite shall not exceed 1 milligram per liter as
nitrogen.
3) Turbidity.
The maximum contaminant level in a water system that uses surface water in
whole or in part, measured at a representative entry point to the distribution
system, shall not exceed one turbidity unit, except that turbidity values
greater than 1 or less than or equal to 5 turbidity units may be allowed if the
supplier of water can demonstrate to the Department and the Department agrees
in writing that the higher turbidity does not do any of the following:
A) Interfere with disinfection.
B) Prevent maintenance of an effective
disinfectant residual throughout the distribution system.
C) Interfere with microbiological
determinations.
4)
Bacteriological. Any water supply that has 2 consecutive water samples positive
for coliform bacteria, or has any water sample that is E. coli positive, is in
violation of the coliform maximum contaminant level.
5) Inorganic Chemicals. The maximum
contaminant levels for the following inorganic chemicals shall not be exceeded:
Chemical | Maximum Contaminant Level |
Asbestos | 7 million fibers/liter |
Barium | 2 mg/L |
Cadmium | 0.005 mg/L |
Chromium | 0.1 mg/L |
Mercury | 0.002 mg/L |
Selenium | 0.05 mg/L |
Fluoride | 4 mg/L |
Lead | 0.015 mg/L |
Copper | 1.3 mg/L |
Antimony | 0.006 mg/L |
Beryllium | 0.004 mg/L |
Cyanide | 0.2 mg/L |
Nickel | 0.1 mg/L |
Thallium | 0.002 mg/L |
6)
Synthetic Organic Chemicals. The maximum contaminant levels for the following
synthetic organic chemicals shall not be exceeded:
Chemical | Maximum Contaminant Level |
Alachlor | 0.002 mg/L |
Atrazine | 0.002 mg/L |
Carbofuran | 0.04 mg/L |
Chlordane | 0.002 mg/L |
1,2-Dibromo-3-Chloropropane (DBCP) | 0.075
mg/L |
Heptachlor | 0.0004 mg/L |
Heptachlor epoxide | 0.002 mg/L |
Lindane | 0.0002 mg/L |
Methoxychlor | 0.04 mg/L |
Polychlorinated biphenyls (PCBs) | 0.0005 mg/L |
Pentachlorophenol | 0.001 mg/L |
Toxaphene | 0.002 mg/L |
2,4,5-TP (Silvex) | 0.05 mg/L |
Diquat | 0.02 mg/L |
Endothall | 0.1 mg/L |
Glyphosate | 0.7 mg/L |
Oxamyl (Vydate) | 0.2 mg/L |
Picloram | 0.004 mg/L |
Simazine | 0.02 mg/L |
7)
Volatile Organic Chemicals. The maximum contaminant levels for the following
volatile organic chemicals shall not be exceeded.
Chemical | Maximum Contaminant Level |
Benzene | 0.005 mg/L |
Carbon tetrachloride | 0.005 mg/L |
1,2-Dichloroethane | 0.005 mg/L |
Trichloroethylene | 0.005 mg/L |
para-Dichlorobenzene | 0.075 mg/L |
1,1-Dichloroethylene | 0.007 mg/L |
1,1,1-Trichloroethane | 0.2 mg/L |
Vinyl chloride | 0.002 mg/L |
cis-1,2-Dichloroethylene | 0.07 mg/L |
1,2-Dichloropropane | 0.005 mg/L |
Ethylbenzene | 0.7 mg/L |
Monochlorobenzene | 0.1 mg/L |
o-Dichlorobenzene | 0.6 mg/L |
Styrene | 0.1 mg/L |
Tetrachloroethylene | 0.005 mg/L |
trans-1,2-Dichloroethylene | 1 mg/L |
Toluene | 0.1 mg/L |
Xylene | 10 mg/L |
Dichloromethane | 0.005 mg/L |
1,2,4-Trichlorobenzene | 0.07 mg/L |
1,1,2-Trichloroethane | 0.005 mg/L |
8)
Maximum Contaminant Level Exceeded. At any time a maximum contaminant level is
found to have been exceeded in any water supply and the water will be made
accessible to the public for human consumption, excluding a public water
system, the owner of the supply shall notify the local health department or the
Illinois Department of Public Health for a determination regarding any required
corrective action. It shall be the responsibility of the water supply owner to
assure that any required analyses are performed by laboratories approved for
these analyses by the Department or the Illinois Environmental Protection
Agency and the results are submitted to the Department or the local health
department. A list of approved laboratories will be provided by the Department
upon request.
c)
Drinking Fountains. Drinking fountains must meet the requirements of the
Illinois Plumbing Code (77 Ill. Adm. Code 890).