Connecting the Rain Drops.
Shoalwater began with a simple observation: cities experience stormwater as one connected problem, but most green infrastructure is delivered one property at a time.
Rain falling on roofs, streets, and parking lots moves quickly through the built environment, carrying heat and pollution toward pipes, creeks, lakes, and Puget Sound.
Green stormwater infrastructure gives cities a way to slow that movement and rebuild natural function where the rain actually falls.
Explore Why Stormwater ↗The opportunity is already distributed across thousands of properties.
A rain garden beside a church.
A cistern behind an apartment building.
Bioretention along a parking lot.
Rainwater reused instead of immediately discharged.
The infrastructure can be distributed without the effort being fragmented.
Shoalwater exists to help turn individual opportunities into working projects—and, over time, connect them into something larger.
We identify strong sites, develop practical projects, coordinate delivery, and preserve the evidence behind each installation. As more projects are developed consistently, they can begin to function as a connected layer of urban water infrastructure across a watershed.
Technology should not pull us further from nature. It should help us understand, strengthen, and scale it.
Start where the water, city, and ecosystem meet.
Shoalwater is beginning in Seattle and Puget Sound, where rainfall, urban development, salmon-bearing waters, and private-property opportunity all converge.
The goal is not to be everywhere first. It is to become deeply useful in one watershed region.
Cesar Tinajero
Cesar founded Shoalwater after working directly with green stormwater infrastructure in the Seattle region and seeing the gap between individual projects and larger watershed goals.
His background includes hands-on RainWise work, regenerative building experience, and technology entrepreneurship. That combination shapes Shoalwater's approach: practical on the ground, systems-oriented at scale, and careful about keeping real infrastructure at the center of the work.
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