About this project

Hi, my name is Wallace Darling. I'm a hydrogeologist based in San Marcos, Texas, and I created this project to give people who are even slightly interested in rainwater harvesting a practical place to start.

Even working in this field, I know how difficult it can be to find reliable data and run useful simulations. I wanted to make it easier to move beyond spreadsheets and broad averages that may not reflect what actually happens at your home.

I also wanted to make this tool free, so more people can put their money toward installing a system instead of paying just to evaluate one. The larger goal is simple: help more people gain access to additional water sources and more control over their water future.

San Marcos River: Invasive Species Clean Up

Ways to get involved

Collaborate

Developers, data folks, educators: let’s improve the model and UI together.

Feedback

Tell us what’s confusing, what’s missing, or what worked great.

Sponsorship

Support ongoing hosting and improvements; be recognized as a sponsor.

Local resources

Know a great installer, city rebate, county program, or local resource we should list? Send recommendations so Texans can find help in their area.

Have feedback or want to partner?

I’d love to hear from you — research, education, installers, sponsorship, and users.