A. General Potable Water Supply Requirements: All developments and occupied facilities shall be properly connected to an approved and functioning public/community water system where such a system is available. Where a public/community water system is not available, developments shall provide and occupied facilities shall be connected to such a system when required by the county, as discussed in subsections C1a and C1b of this section. The use of individual private wells shall be restricted and shall be dependent on local groundwater conditions, the type of sewage disposal system used, and the known or anticipated extent/density of development within the area.
B. Connection To Existing System:
1. Depending on the number of dwelling units, residential developments shall be connected to an existing water supply system if service is available within the following distances from the nearest property to the water system:
Development Size | Distance |
1 unit | 200 feet |
2 units | 400 feet |
3 units | 600 feet |
4 units | 800 feet |
5 - 15 units | 1,000 feet |
2. When a residential development with more than fifteen (15) units is located within one mile of an existing water system, adequate justification shall be provided as to why it shall not have a connection to the existing water supply system. For residential developments with more than fifteen (15) units and located more than one mile from an existing system, water supply system strategy shall be determined on a case by case basis taking into consideration density of the development, costs, groundwater availability and quality, and the concerns and criteria noted in subsections C1a, C1b, C1c and C2 of this section.
3. Small scale nonresidential developments may be required to be connected to an existing water supply system if service is available within one thousand feet (1,000'). Water supply requirements for large scale nonresidential developments within or more than one mile from an existing system shall be as indicated in subsection B2 of this section. Judgments and decisions regarding nonresidential factors such as size, water use, and fire protection needs shall be as reasonably determined by the county on an individual basis taking into account the specific characteristics of the development.
C. Type Of System:
1. Public Or Community Water System:
a. When warranted, a complete public/community water system, including supply well, storage and treatment facilities, and distribution mains may be requested by the county in order to:
(1) Ensure the availability of potable water meeting the quality standards established by the Illinois EPA.
(2) Enable proper monitoring and testing of potable water supplies for public health purposes.
(3) Provide an adequate level of fire protection.
b. The following conditions shall be evaluated in determining the necessity of a public/community water supply system in lieu of private individual wells:
(1) Location of the development with regard to extraterritorial limits of municipalities with public water systems.
(2) Availability and quality of existing groundwater supply sources.
(3) Development density and type with regard to the level of fire protection that should be provided.
(4) The possibility of future additional development that could negatively impact private individual well water supply sources.
c. Residential and nonresidential developments and subdivisions that will have nine (9) or more lots, fifteen (15) or more service connections, or twenty five (25) or more residents or occupants shall be required to provide a community water system. Individual wells may be allowed through variance, depending on the conditions indicated in subsection A of this section. A variance shall only be granted to parcels of record as of August 9, 1994, whether the parcel of record is subdivided or developed as a whole or in phases.
d. If a public/community water system is required, an agreement between the county and the applicant (developer) may be established (at the county's option) to enable equitable recovery of system and operating costs if other developments connect to the system.
e. If a public water supply system is to be provided to the area within a five (5) year period as indicated in a water master plan, official map, or other official document, the county may require installation of a capped system or dry lines (mains only), or the county may require a payment in lieu of the improvement.
2. Private Water Supply 2 : If a water supply system is not available and a new community water system is not warranted or feasible, residential housing units and nonresidential facilities shall be served by individual private wells. The use, design, and installation of such wells shall conform to county health department requirements and will require a permit issued by said department.
3. Approval Of Water Supply Required: All proposals for new community water supplies, or extensions to existing water systems, or the installation of dry lines, or use of wells and other water sources shall be subject to the approval of the county.
D. System Capacity:
1. The water supply system shall be adequate to handle anticipated flows based on complete development of the water system service area.
2. The demand rates for all uses shall be considered in computing total system demand. Where fire protection is provided, the system shall be capable of providing the required fire demand plus the required domestic demand.
3. Daily residential demand shall be computed in accordance with the population served. The water use per person for such calculations shall be one hundred (100) gpd for single-family detached units and eighty (80) gpd for other housing types.
4. Nonresidential demand shall be computed from water use data and standards determined to be acceptable to both the county and the Illinois EPA.
5. Residential water systems shall be designed to carry peak hour flows and be capable of delivering the following peak hour demands with a minimum water main pressure of thirty five (35) psi:
Total Residential Units Served | Peak Hour Rates (GPM Per Unit) |
Total Residential Units Served | Peak Hour Rates (GPM Per Unit) |
5 | 8 |
10 | 5 |
50 | 3 |
100 | 2 |
250 | 1.3 |
500 | 0.8 |
700 | 0.7 |
1,000 or more | 0.6 |
6. Fire protection facilities (hydrants, storage tanks, and large capacity pumps) shall be furnished as part of a community water supply system whenever feasible. Minimum fire flows shall be based on recommendations by the American Insurance Association and the National Board Of Fire Underwriters. Detailed fire protection requirements shall be as specified by the local fire department or fire protection district.
7. For developments of one- and two-family dwellings, not exceeding two (2) stories in height, the following fire flows may be used:
Distance Between Buildings
1 |
Required Fire Flow |
Over 100 feet | 500 gpm |
21 - 100 feet | 750 - 1,000 gpm |
11 - 20 feet | 1,000 - 1,500 gpm |
10 feet or less | 1,500 - 2,000 gpm |
Note:
1. For contiguous buildings (attached dwelling units of 2 or more two-family units and/or multi-family units), a minimum of 2,500 gpm may be used.
8. When standard fire protection facilities are not feasible for a small community water system and in rural type developments not served by a community water system, supplementary fire protection shall be provided by means of special manhole structures or suitable riser pipes connected to available water sources such as ponds or lakes. Said facilities are intended to enable fire vehicle storage tanks to be refilled by drawing water from the water source. These facilities shall be installed adjacent to street pavements and connected to water sources with pipes set three (3) to five feet (5') below normal water level.
E. System Design And Layout:
1. General Design And Layout Requirements:
a. Water supply system criteria and standards shall be in accordance with accepted engineering practices regarding such systems. The county shall have the prerogative to make use of those practices that it feels represent the best available information and procedures.
b. The design and construction of water distribution systems; water supply wells; and treatment, storage, and pumping facilities shall comply with all applicable American Waterworks Association (AWWA) standards and all Illinois EPA regulations and permit requirements.
2. Water Main Location:
a. Water mains shall typically be located within street rights of way or in utility easements adjacent to street rights of way.
b. Water mains may be located within open space areas or along rear or side lot lines if necessary to create looped main systems and if adequate maintenance access is provided to valves.
c. All water mains not located within street rights of way shall be placed within defined utility easements. The minimum width of such easements shall be ten feet (10').
d. Water mains shall be located no closer than twenty feet (20') from any building or structure.
3. Distribution Mains:
a. The minimum pipe size shall be eight inches (8") in diameter, except in specific instances where a six inch (6") diameter is warranted and is approved by the county.
b. Looped mains shall typically be required, but nonlooped mains for short cul-de-sacs, small cluster housing areas, and similar situations will be considered on an individual basis.
4. Valves:
a. Water main valves shall be located so that no more than three (3) of them are required to be shut off to isolate any section of main. In no event shall more than five (5) valves have to be shut off to isolate a section upon connection of a new main with an existing main.
b. The maximum valve spacing shall be one thousand feet (1,000').
c. Distribution main valves shall be placed in concrete vaults. Valves on large size building service lines and fire protection service lines may have cast iron valve boxes.
5. Fire Hydrants:
a. Hydrants shall be located and spaced such that two hundred fifty foot (250') radius circles centered on each hydrant cover at least seventy six percent (76%) of each individual building on a site. All points of a building shall be within a three hundred fifty foot (350') radius of one or more hydrants. Where, in the opinion of the county, a subject building is not accessible from a specific hydrant, that hydrant shall not be used to determine the adequacy of coverage of the building.
b. Where water mains are installed in an area prior to knowing the intended layout of the buildings intended to be served, hydrants shall be provided at intervals not exceeding four hundred fifty feet (450').
c. Hydrants need not be provided in open space areas or along roadways where there are no buildings existing or planned within a distance of three hundred feet (300'), or where the buildings are not accessible from the water main location. But the county has the option of requiring a reasonable number of hydrants for specific uses other than protecting project structures.
d. One hydrant may be installed on a nonlooped six inch (6") main extension not exceeding three hundred feet (300') in length, provided there are no building fire protection services connected to the extension.
e. Hydrant locations shall be subject to review by the local fire protection authority.
6. Building Services:
a. A separate water service connection for each unit shall be utilized for detached housing and nonresidential buildings where maintenance is the responsibility of the individual property owner.
b. Common water service connections may be allowed for multi- family housing and multi-unit nonresidential buildings where there is an entity (such as an owners' association) responsible for the maintenance of the common water services. Where common services are utilized, individual water shutoffs shall be provided for each unit.
c. The minimum size service for an individual dwelling unit shall be a one inch (1") line with a three-fourths inch (3/4") meter.
d. Services for multi-unit buildings shall be sized for the number of units served and to provide fire protection, if required.
e. Two (2) service lines may be placed in the same trench when they serve adjacent attached dwelling units.
f. Water services and sanitary services may be placed in the same trench, provided that the water service is placed on an earth bench at least eighteen inches (18") above the top of the sanitary service pipe.
7. Additional Requirements: Water distribution system material, equipment, and construction requirements shall be as indicated in the specifications included in this chapter. (Ord. 10-001, 1-12-2010)
Notes
| 1 | 1. See also title 5, chapter 3 of this code. |
| 2 | 1. See also title 5, chapter 3 of this code. |