A Phase IV Water Shortage refers to a critical shortage, whereby a reduction in overall user demand of up to 60 percent is necessary to achieve adequate protection of the water resource, and of the public health, safety, and welfare. In addition to the following restrictions, the Governing Board in consultation with District staff, shall when necessary, implement other restrictions to achieve the required percent reduction in overall demand.
    (1) Aesthetic Use (Fountains, Pond Water Level Maintenance, etc.).
    (a) Outside use of water for aesthetic purposes is prohibited.
    (b) Inside use of water for aesthetic purposes is prohibited.
    (2) Agricultural Irrigation Use.
    (a) Low volume irrigation is not restricted.
    (b) Overhead irrigation, excluding traveling volume gun, will be restricted to the hours of 7:00 p.m. to 9:00 a.m. However, overhead irrigation of containerized nursery stock for heat/moisture stress reduction is allowed between the hours of 12:00 Noon and 1:00 p.m.
    (c) Traveling volume gun irrigation will be reduced to the maximum extent practicable, and will be restricted to the hours of 5:00 p.m. to 11:00 a.m.
    (d) Irrigation of or preparation for planting new nursery plants is allowed any time of day for one 30 day period provided irrigation is limited to the amount necessary for plant establishment.
    (e) All irrigation systems will be operated in a manner that will maximize the amount of water placed and held in the root zone of the crop and will minimize the amount of water which is withdrawn and released or lost to the user but is not immediately available to other users.
    (f) Chemigation shall be coordinated with the irrigation schedules.
    (g) Watering in of chemicals, including insecticides, pesticides, fertilizers, fungicides, and herbicides, when required by law, the manufacturer, or best management practices, shall be coordinated with the irrigation schedules.
    (h) The operation of irrigation systems for cleaning and maintenance purposes shall be limited to the minimum necessary to maintain efficient operation of the system and shall be limited to a maximum of once per week.
    (i) Flood and seepage irrigation methods shall not have a tailwater discharge from the property.
    (j) The voluntary use of other water conservation techniques is encouraged.
    (3) Aquacultural Use. Voluntary reduction in water use is encouraged.
    (4) Aquifer Restoration Use. The withdrawal of water shall be limited to the minimum necessary to efficiently operate the recovery system.
    (5) Commercial Use.
    (a) Water use at commercial car washes with odd numbered addresses is restricted to Monday, Wednesday, Friday, Saturday and Sunday.
    (b) Water use at commercial car washes with even numbered addresses and locations with no address is restricted to Monday, Tuesday, Thursday, Saturday and Sunday.
    (c) Other commercial processes are encouraged to make a 15% voluntary reduction based on 3 months normal operation prior to the initial declaration of water shortage.
    (d) Off-site discharge shall be reduced or eliminated to the extent possible.
    (e) Recycled water shall be used to replace fresh water wherever feasible.
    (f) Clean-up requiring water use shall be reduced to the minimum required to protect the efficiency of the operation and prevent damage to equipment.
    (g) Reduce or suspend the washing of vehicles except for health and safety needs.
    (6) Dewatering Use.
    (a) Discharge of fresh water to tide is prohibited.
    (b) Discharge of fresh water offsite is prohibited.
    (7) Diversion and Impoundment into Non-District Facility. Voluntary reductions in diversions are encouraged.
    (8) Domestic Uses. Voluntary reduction of household domestic use to 30 gallons per person per day is encouraged.
    (9) Essential Use.
    (a) The use of water for firefighting and health or medical purposes is not restricted.
    (b) Fire hydrant flushing and testing is restricted to that necessary for the protection of human health, safety, and welfare.
    (c) Sanitary sewer line flushing and testing is restricted to that necessary for the protection of human health, safety and welfare.
    (10) Freeze Protection. Water use is limited to situations in which official weather forecast services predict freezing temperatures likely to cause permanent damage to crops.
    (11) Golf Course Irrigation Use.
    (a) Irrigation of greens shall be reduced to the maximum extent practicable and shall be accomplished during non-daylight hours.
    (b) Irrigation of tees on the front one half of the course(s) shall be restricted to non-daylight hours on Saturday.
    (c) Irrigation of tees on the back one half of the course shall be restricted to non-daylight hours on Sunday.
    (d) Irrigation of fairways, roughs, and non-play areas on the front one half of the course(s) shall be restricted to the hours of 4:00 a.m. to 7:00 a.m. on Saturday.
    (e) Irrigation of fairways, roughs, and non-play areas on the back one half of the course(s) shall be restricted to hours of 4:00 a.m. to 7:00 a.m. on Sunday.
    (f) Reduce or suspend as possible, those horticultural practices which stimulate the need for increased irrigation.
    (g) Chemigation shall be coordinated with the irrigation schedules.
    (h) Watering in of chemicals, including insecticides, pesticides, fertilizers, fungicides, and herbicides, when required by law, the manufacturer, or best management practices, shall be coordinated with the irrigation schedules.
    (i) The operation of irrigation systems for cleaning and maintenance purposes shall be limited to the minimum necessary to maintain efficient operation of the system and shall be limited to a maximum of once per week.
    (12) Heating and Cooling Use.
    (a) The use of water is restricted to that necessary to maintain temperatures no colder than 68 degrees and no warmer than 78 degrees.
    (b) No immediate discharge of water to tide-water is permitted.
    (c) Any water not directly returned to the source from which it was withdrawn shall be reused, if possible.
    (d) Discharge of water from heating or cooling systems shall be limited to pervious surfaces.
    (13) Industrial Process and Perishable Food Processing Uses.
    (a) Voluntary 15% reduction in water used in Industrial processes, based on three months of normal operation prior to initial declaration of the water shortage, is encouraged.
    (b) Recycled water shall be used wherever feasible.
    (c) Nonessential uses, plant cleaning, and water-cooled air conditioning, shall be reduced or eliminated to the greatest extent possible.
    (14) Landscape Irrigation and Recreation Area Irrigation Use.
    (a) Irrigation of new landscape (installed less than 30 days) is restricted to the hours of 4:00 a.m. to 7:00 a.m. on Saturday.
    (b) Irrigation of existing landscape at a location with an odd numbered address shall occur between the hours of 6:00 a.m. and 7:00 a.m. on Saturday.
    (c) Irrigation of existing landscape at a location with an even numbered address or no address shall occur between the hours of 6:00 a.m. and 7:00 a.m. on Sunday.
    (d) Low volume watering of existing landscaping is restricted to Monday, Wednesday and Friday during non-daylight hours, but should be voluntarily reduced further.
    (e) Chemigation shall be coordinated with the irrigation schedules.
    (f) Watering in of chemicals, including insecticides, pesticides, fertilizers, fungicides, and herbicides, when required by law, the manufacturer, or best management practices, shall be coordinated with the irrigation schedules.
    (g) The operation of irrigation systems for cleaning and maintenance shall be limited to the minimum necessary to maintain efficient operation of the system and shall be limited to a maximum of once per week.
    (15) Livestock and Other Animal Use. Voluntary reduction in water use is encouraged.
    (16) Mining Use.
    (a) Impounded surface water shall be used to replace fresh water withdrawals wherever possible.
    (b) Spraying for dust control shall be kept to the minimum required for health and safety.
    (c) Closed pipes shall be utilized for conveying water where feasible.
    (17) Navigation Use. Requests may be made for additional releases from upstream impoundments.
    (18) Nursery Irrigation Use (Non-agricultural).
    (a) Voluntary reduction of water use by low volume irrigation methods (e.g., micro-irrigation) is encouraged.
    (b) Overhead irrigation of nursery plants is restricted to the hours of 12:00 Noon to 1:00 p.m. and from 2:00 a.m. to 7:00 a.m. on Monday, Wednesday and Saturday.
    (c) Chemigation shall be coordinated with the irrigation schedules.
    (d) Watering in of chemicals, including insecticides, pesticides, fertilizers, fungicides, and herbicides, when required by law, the manufacturer, or best management practices, shall be coordinated with the irrigation schedules.
    (e) The operation of irrigation systems for cleaning and maintenance shall be limited to the minimum necessary to maintain efficient operation of the system and shall be limited to a maximum of once per week.
    (f) The use of flooding for irrigation purposes shall be limited to 2 days per month.
    (19) Other Outside Uses.
    (a) Washing or cleaning of streets, driveways, sidewalks or other impervious surfaces is prohibited except to meet federal, state, or local health or safety standards.
    (b) Non-commercial vehicle and mobile equipment washing is allowed on pervious surfaces only, during landscape irrigation hours, by low volume methods only.
    (c) Washing boats that serve as a primary residence shall be restricted to the hours and days prescribed for existing landscape irrigation. Boats with an odd slip number shall be permitted to be washed on Saturday. Boats with an even slip number or no slip number shall be permitted to be washed on Sunday.
    (d) Rinsing of boats and flushing of boat engines after use shall be limited to ten minutes a day.
    (e) Outside pressure cleaning is allowed using low volume processes only on Monday and Wednesday.
    (20) Power Production Use.
    (a) To the greatest extent practicable, power production from facilities utilizing the water source experiencing the shortage should be minimized while maximizing the use of facilities dependent on less affected water sources.
    (b) Non-essential uses of water, plant cleaning, and water-cooled air conditioning shall be reduced or eliminated to the greatest extent possible.
    (c) Power companies should encourage customers to reduce power consumption, so that they may reduce power generation, and in turn, reduce water consumption.
    (d) Voluntary reductions in other water uses is encouraged.
    (21) Public Supply Use.
    (a) Initial pressure at the point of use (meter) will be reduced by 15% where it is operationally feasible to do so. Prior to the reduction of pressure, the utility will notify the appropriate firefighting agencies and make arrangements for direct communication when additional pressure is required.
    (b) Utilities shall institute, as appropriate, conservation measures such as improving and accelerating leak detection surveys and repair programs, and installing and calibrating meters.
    (c) New water line flushing and disinfection shall be limited to minimum requirements.
    (22) Sanitation and Other Public Supply Uses. Voluntary reduction in water use by 30% is encouraged.
    (23) Soil Flooding Use.
    (a) Sod-flooding for pest control and soil preservation is prohibited.
    (b) Sod-flooding to permit harvesting is prohibited.
    (24) Water Based Recreation Use.
    (a) Filling of new and existing facilities is prohibited.
    (b) Makeup water for new and existing facilities is prohibited.
    (c) Draining of facilities into sewers or onto impervious surfaces is prohibited.
    (d) Voluntary reductions in water used for other aspects of water based recreation is encouraged.
Rulemaking Authority 373.044, 373.113 FS. Law Implemented 373.175, 373.246 FS. History-New 3-29-92.