Illinois Administrative Code

Section 604.1205 Pumping Stations a) Both raw and finished water-pumping stations must: 1) have adequate space for the installation of additional units if needed, and for the safe servicing of all equipment; 2) be of durable construction, fire and weather resistant, and with outw…

Section 604.1210 Pumps a) At least two pumping units must be provided for all pump stations. b) With any pump out of service, the remaining pump or pumps must be capable of providing the maximum demand of the community water supply. c) The pumping units must be provided with read…

Section 604.1215 Booster Pumps a) Each booster pumping station must contain no fewer than two pumps with capacities such that maximum demand can be satisfied with the largest pump out of service. b) Construction must conform to Section 604.150. c) Automatic control equipment must…

Section 604.1220 Automatic and Remote-Controlled Stations a) All remote-controlled pumping facilities must be electrically operated and controlled and must have signaling apparatus of proven performance. b) All automatic pumping facilities must be provided with automatic signalin…

Section 604.1225 Appurtenances a) Valves 1) Each pump must have an isolation valve on the inlet and discharge side of the pump to permit satisfactory operation, maintenance and repair of the equipment. 2) Each pump must have a positive acting check valve on the discharge side bet…

Section 604.125 Automatic Equipment a) Equipment that will automatically shut down a water treatment process is acceptable, provided restart procedures are manual. b) Automatic startup must be allowed for treatment plants that treat only groundwater and have only unit processes n…

Section 604.130 Operational Testing Equipment a) Monitoring Equipment. Community water supplies must have equipment to monitor the water as follows: 1) Plants treating surface water and groundwater under the direct influence of surface water must have the capability to monitor an…

Section 604.1300 General Storage Requirements a) Storage facilities must have sufficient capacity to meet domestic demands and, where fire protection is provided, fire flow demands. b) Excessive storage capacity must be avoided to prevent potential water quality deterioration pro…

Section 604.1305 Overflow a) All water storage structures must be provided with an overflow that is brought down to an elevation between 12 and 24 inches above the ground surface and that discharges over a drainage inlet structure or a splash plate. b) No overflow may be connecte…

Section 604.1310 Access to Water Storage Structures a) Finished water storage structures must be designed with access to the interior for cleaning and maintenance. b) At least two manholes must be provided above the waterline at each water compartment where space permits. c) For …

Section 604.1315 Vents a) Finished water storage structures must be vented as follows: 1) the overflow pipe must not be considered a vent; and 2) open construction between the sidewall and roof is not permissible. b) Vents must: 1) prevent the entrance of surface water and rainwa…

Section 604.1320 Level Controls Storage structures must provide: a) adequate controls, including telemetering equipment, to maintain water levels within the operating range of distribution system storage structures; b) level indicating devices; and c) overflow and low-level warni…

Section 604.1325 Roof and Sidewalls a) The roof and sidewalls of all water storage structures must be watertight with no openings except properly constructed vents, manholes, overflows, risers, drains, pump mountings, control ports, or piping for inflow and outflow. b) Any pipes …

Section 604.1330 Painting and Cathodic Protection a) Metal surfaces must be protected by paints or other protective coatings, by cathodic protective devices, or by both. b) Paint Systems 1) Paint systems must comply with Section 604.105(f); and 2) Interior paint must be applied a…

Section 604.1335 Treatment Plant Storage Treatment plant storage must meet the following requirements. a) Clearwell storage must: 1) provide contact time, when required, under Section 604.715; 2) ensure adequate disinfectant contact time by sizing the clearwell to include extra v…

Section 604.1340 Elevated Storage a) The minimum storage capacity must: 1) be equal to the average daily usage or be based on an engineering study of the distribution system hydraulic conditions, anticipated domestic water demands of the system, and, where fire protection is prov…

Section 604.1345 Hydropneumatic Storage a) Hydropneumatic tanks, when provided as the only water storage, are not acceptable in community water supplies with over 150 service connections. b) Hydropneumatic tank storage is not to be permitted for fire protection purposes. c) Hydro…

Section 604.135 Repair Work and Emergency Operation a) The community water supply must be protected from contamination when any part of the system is out of service for repair, construction, alteration or replacement. b) Disinfection Following Repair 1) Any part of a community wa…

Section 604.1350 Combination Pressure Tanks and Ground Storage A combination of ground storage, hydropneumatic storage, and pumps may be considered in water systems for maintaining pressure on the distribution system. Design of such a system must include: a) a minimum ground stor…

Section 604.140 Nitrification Action Plan Any community water supply distributing water without a free chlorine residual must create a Nitrification Action Plan (NAP). The NAP must: a) contain a plan for monitoring total ammonia-N, free ammonia-N, nitrite-N, nitrate-N, monochlora…

Section 604.1400 General Distribution System Requirements a) Water distribution systems must be designed to maintain finished water quality. b) The community water supply must have a record keeping system to document the nature and frequency of water main breaks. c) The system mu…

Section 604.1405 Installation of Water Mains a) Except as provided in 35 Ill. Adm. Code 602.200, a permit from the Agency is required before the installation of a water main. b) Bedding 1) A continuous and uniform bedding must be provided in the trench for all buried pipe. 2) Bac…

Section 604.1410 Materials a) All materials, including ductile iron pipe, steel pipe, concrete pipe, plastic pipe, pipe liners, joints, fittings, valves and fire hydrants, must conform to the AWWA, ASTM, ANSI or NSF standards incorporated by reference at 35 Ill. Adm. Code 601.115…

Section 604.1415 System Design a) Pressure 1) The system must be designed to maintain a minimum pressure of 20 psi at ground level at all points in the distribution system under all conditions of flow. 2) The normal working pressure on all transmission mains for finished water mu…

Section 604.1420 Valves a) A sufficient number of valves must be provided to isolate portions of the distribution system during repairs and maintenance and to facilitate unidirectional flushing. b) Location. Unless otherwise approved by the Agency under Section 604.145(b), valves…

Section 604.1425 Hydrants a) Only water mains designed to carry fire flows may have fire hydrants connected to them. 1) The fire hydrant lead must be a minimum of six inches in diameter. 2) Auxiliary valves must be installed on all fire hydrant leads. b) Unless otherwise approved…

Section 604.1430 Air Relief Valves a) Air relief valves must be installed at high points in water mains where air can accumulate. b) Automatic air relief valves must not be used in situations where flooding of the manhole or chamber may occur. c) Air Relief Valve Piping 1) The op…

Section 604.1435 Valve, Meter and Blow Off Chambers a) Valves, blow offs, meters or other such appurtenances to a distribution system must be protected from standing water in the chambers, pits or manholes. b) Chambers, pits or manholes containing valves, blow offs, meters, or ot…

Section 604.1440 Sanitary Separation for Finished Water Mains Water mains must be protected from sanitary sewers, storm sewers, combined sewers, house sewer service connections and drains as follows: a) Horizontal Separation 1) Water mains must be laid at least 10 feet horizontal…

Section 604.1445 Sanitary Separation for Raw Water Mains a) Raw water mains from groundwater sources must have the same sanitary separation as provided in Section 604.1440 for finished water mains. b) Raw water mains from surface water sources must have the same sanitary separati…

Section 604.145 Exceptions for Community Water Supplies a) A community water supply operating before July 26, 2019 is not required to modify or replace components to meet the requirements of this Part if: 1) the requirements of 35 Ill. Adm. Code 611 are met; 2) the requirements o…

Section 604.1450 Surface Water Crossings a) For above‑water crossings, the pipe must be adequately supported and anchored, protected from damage and freezing, and accessible for repair or replacement. b) Underwater Crossings 1) A minimum cover of five feet must be provided over t…

Section 604.1455 Water Service Line a) A community water supply must not supply water through a water service line to more than a single property, dwelling or rental unit. b) If a pipe from the water main or source of potable water supply is accessible to more than one property, …

Section 604.1460 Water Loading Stations To prevent contamination of both the public supply and potable water vessels being filled, the following principles must be met in the design of water loading stations: a) a six inch or larger air gap or other Agency approved cross connecti…

Section 604.150 Protection of Community Water Supply Structures a) Each community water supply must protect its wells, clear water reservoirs, suction lines, gravity filters, iron removal, chlorine reaction and wet salt storage basins from sources of contamination by maintaining …

Section 604.1500 Cross Connections a) No cross connection is allowed between water plant piping and any drain or sewer. Backflow prevention installed within the water treatment facility must comply with the Illinois Plumbing Code (77 Ill. Adm. Code 890). b) No cross connection is…

Section 604.1505 Cross Connection Control Program a) All community water supplies, including those that meet the criteria in Section 17(b) of the Act and any exempt community water supply as defined in Section 9.1 of the Public Water Supply Operations Act [415 ILCS 45], must have…

Section 604.1510 Cross-Connection Control Device Inspectors a) Except as provided in subsection (c), cross-connection control devices must be inspected at least annually by a person approved by the Agency or its designee as a cross-connection control device inspector (CCCDI). The…

Section 604.1515 Agency Approved Cross Connection Control Measures a) For all mains, pipes, structures through which water is obtained and distributed to the public, including wells and well structures, intakes and cribs, pumping stations, treatment plants, reservoirs, storage ta…

Section 604.1520 COVID-19 Emergency Provisions (Repealed) (Source: Repealed at 47 Ill. Reg. 7503, effective May 16, 2023)

Section 604.155 Electrical Controls and Standby Power a) Electrical controls must be located above grade, in areas not subject to flooding. b) Each community water supply must provide on site, dedicated standby power capable of maintaining continued operation of its water system …

Section 604.160 Safety a) All community water supplies whose treatment involves chemical application must have and maintain a chemical safety plan. b) All community water supply personnel involved in the use and maintenance of chemicals must have periodic safety training.

Section 604.165 Monthly Operating Report a) The community water supply must prepare an operating report on a form approved by the Agency as specified in a construction, operating or special exception permit. b) An individual set of operating reports must be maintained for each in…

Section 604.170 Security a) Each community water supply well, well house, raw water intake structure, pumping stations, treatment plant buildings, and treated water storage reservoirs must be protected to prevent vandalism and entrance by animals or unauthorized persons. b) Fenci…

Section 604.200 General Requirements a) Each water supply must take its raw water from the best available source that is economically reasonable and technically possible. b) In selecting the source of water to be developed, the community water supply must prove the following: 1) …

Section 604.205 Surface Water Quantity The quantity of surface water at the source must: a) be adequate to meet the maximum projected water demand of the service area as shown by calculations based on a one in 50-year drought or the extreme drought of record, and should include c…

Section 604.210 Surface Water Quality a) For all surface water, community water supplies must provide conventional filtration treatment or filtration treatment using technologies approved by the Agency under 35 Ill. Adm. Code 611.250(d) and disinfection. b) For all groundwater un…