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Cistern Engineering



Mark Ragel/Water Harvesting International
A full-service, licensed, bonded, and insured water-harvesting contractor and consulting company, WHI offers a range of services from cistern consultation/design/engineering/installation to greywater, earthworks, pumping, swimming-pool conversion, and drinking-water filtration services – see those sections of this website, visit their website, or contact them for details. WHI works directly with homeowners, general contractors and

Alain Provost
Although now semi-retired, Alain has 25 years’ experience running his own general-contracting and custom-home-building business. He now offers consultation, design, engineering, and construction of concrete below-ground potable water tanks, ranging in size from 15,000 – 30,000 gallons.
(520) 743-9375 or

Grenier Engineering


This site is a comprehensive information center for efficiency, rainwater, graywater, stormwater and black water management, capture and reuse.  You can find Products and Services from around the state and country, links to Rebates and Incentives, a Calendar of statewide water events, Tips, Best Practices, Demonstration Projects, Films, Blogs, an Art Gallery, and much more.

Rainwater Harvesting