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601.1.1 Alternate On-Site Sources of Water. Alternate On-Site Sources of Water can include rainwater/stormwater harvesting, air conditioner condensate, grey water from interior applications and treated as required, swimming pool filter backwash water, foundation drain water, industrial process water, and on-site wastewater treatment plant effluent. Plumbing for grey water systems from any fixture up to, but not including the exterior irrigation system tank shall be inspected by the Authority Having Jurisdiction. The Idaho Department of Environmental Quality (IDEQ) shall have jurisdiction to inspect and approve the installation of exterior irrigation system tank and all piping therefrom to the point of disposal in accordance IDAPA 58.1.03, "Individual/Subsurface Sewage Disposal Rules." Grey water system and design criteria requirements related to irrigation and leaching shall be determined in accordance with the requirements as established by the IDEQ. Where non-potable water is used for a water application, signage shall be provided in accordance with Chapter 16, Part 2, of the Idaho State Plumbing Code.
(Ord. 9-23, 3-7-2023)
601.1.2 Reclaimed Water. The design of any reclaimed water and/or reuse system must be permitted and approved by the Idaho Department of Environmental Quality (IDEQ) in accordance with IDAPA 58.01.17, "Recycled Water Rules." All planning, design, and operation of any reuse facilities shall be under the authority of IDEQ. All piping associated with the collection and distribution of these systems shall be inspected by the Authority Having Jurisdiction in accordance with the Idaho State Plumbing Code. Where non-potable water is used for a water application, signage shall be provided in accordance with Chapter 16, Part 2, of the Idaho State Plumbing Code.
(Ord. 9-23, 3-7-2023)
601.3.1.1 (6.3.1.1) Landscape Design. A minimum of 60% of the area of the improved landscape shall be in biodiverse planting of native plants, adaptive plants, low water use vegetation, and/or rainfall-ETc compatible plants. Consultation on acceptable plant materials can occur with the Boise City Planning Division.
Exceptions:
1. The area of dedicated athletic fields, recreational fields, parks, golf courses, driving ranges, areas dedicated for production of food for human consumption, and similar, at the discretion of the code official, shall be excluded from the calculation of the improved landscape for uses such as schools, outdoor sports facilities, residential common areas, parks, or public recreational facilities.
2. Landscape areas irrigated solely with alternate on-site sources of water shall be exempt from these requirements.
3. Where the average annual rainfall is less than 12 inches (300 mm), plants other than turfgrass, with an annual ETc of 15 inches (380 mm) or less, shall be deemed equivalent to rainfall-ETc compatible plants.
(Ord. 9-23, 3-7-2023)
601.3.1.2 (6.3.1.2) Irrigation (Optional). When chosen to be complied with, landscaped areas, not greater than 80% of improved landscape area is allowed to be irrigated with potable water. The area of dedicated athletic fields shall be excluded from the calculation of the improved landscape for schools, residential common areas, and public recreational facilities. All other irrigation shall be provided from alternate on-site sources of water or municipally reclaimed water.
Exception: Potable water is allowed to be temporarily used on such newly installed landscape for the landscape establishment period. Where municipally reclaimed water is available at a water main within 200 ft (60 m) of the project site, such water shall be used instead of potable water during the landscape establishment period. After the landscape establishment period has expired, all irrigation water use shall comply with the requirements established elsewhere in this code.
(Ord. 9-23, 3-7-2023)
601.3.5.3 (6.3.5.3) Waste Connections. Wastewater from water softener regeneration shall not discharge to reclaimed water collection systems and shall discharge in accordance with the Idaho State Plumbing Code.
(Ord. 9-23, 3-7-2023)
601.3.6 (6.3.6) Reverse osmosis water treatment systems. Reverse osmosis systems shall be equipped with an automatic shutoff valve that prevents the production of reject water when there is no demand for treated water. Point-of-use reverse osmosis treatment systems for drinking water shall be listed and labeled in accordance with NSF 58. The discharge pipe from a reverse osmosis drinking water treatment unit shall connect to the building drainage system in accordance with section 611.2 of the Idaho State Plumbing Code.
(Ord. 9-23, 3-7-2023)
601.3.7 (6.3.7) Onsite reclaimed water treatment systems. On site reclaimed water treatment systems, including grey water reuse treatment systems and wastewater treatment systems, used to produce non-potable water for use in water closet and urinal flushing, surface irrigation and similar applications shall be listed and labeled in accordance with NSF 350 and must be permitted and approved by the Idaho Department of Environmental Quality (IDEQ) in accordance with IDAPA 58.01.17, as referenced in sections 601.1.1 and 601.1.2 of this code.
(Ord. 9-23, 3-7-2023)
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