Applicants may apply for both levels (passive and active) not exceeding $2,000 for the combination.
Incentive Level 1 - Simple/Passive (Rain Garden)
50% of the cost of eligible materials and labor up to $500
Practices: Passive earthworks include directing and retaining water in landscape using site appropriate practices such as basins, berms, terraces, swales, infiltration trenches, and curb cuts:
- surface, sub-surface, and conveyance features
- mulch, rocks/boulders for reinforcement (rock work) and soil amendments
- equipment rental such as tillers, jackhammers, and trenchers
- permits and costs for curb cuts and coring
- labor from licensed contractors (Contractor must be licensed with the Arizona Registrar of Contractors in the particular trade or field for the type of work performed.)
Incentive Level 2 - Complex/Active (Rain Tank)
Rebate covers cost of system based on gallon per capacity of tank up to $2,000.
- $0.25 per gallon capacity of 50-799 gallon rain tank
- $1.00 per gallon capacity of 800 gallon and larger rain tank
Note: The $0.25 and $1.00 per gallon capacity rebate amount includes tank, gutter, tank foundation, overflow, and miscellaneous materials which make up the system For example, the rebate for a system with one 865-gallon tank and one 420-gallon tank is $970 ($865 @ $1 plus 420 @ $0.25). The rebate for a system with two 420-gallon tanks is $210 (840 @ $0.25).
Practices: Rainwater storage tank with gravity-based supply use and overflow directed to landscape passive retention feature and/or passive rain garden.
- below- or above-ground tanks and conveyance plumbing including foundations
- filters and first flush systems
(Note: The installation of water tanks/cisterns may require a permit. Check the Permits Information page for details.
The rainwater harvesting incentive program will not cover costs for the following:
- conveyance features which direct rainwater offsite without entering appropriately-sized landscape retention feature or storage tank, e.g., gutter and downspout directed onto driveway allowing rainwater flow into street
- removing and replacing old gutter
- imported soil to create passive rain garden practices (creation of passive features does not require additional soil; engineered permeable fill can be covered if site requires it to support subsurface storage)
- purchase and delivery of gravel or decomposed granite (also known as DG or 1/4 minus) as a surface cover; decomposed granite includes finer particles which may result in sealing soil surfaces especially in desired infiltration areas
- purchase or installation of pressurizing pumps or associated controls (the incentive program is promoting lower costs and simple rainwater harvesting practices). Pumps are not prohibited; however, their associated costs will not be covered.
- purchase or installation of irrigation systems or backflow prevention devices
- purchase or installation of landscaping materials such as plants, edging, decorative gravel, etc.
- installing, raising, or improving a driveway and removing concrete, asphalt, etc.
- labor completed by owner, neighbor, friend, or handyman
- purchase of tools such as shovels, rakes, drill bits, garden hose, etc.
- used or reconditioned tanks and cisterns