Corporate Water Stewardship Infrastructure

Rain is a resource—not runoff.

Shoalwater measures and connects stormwater infrastructure to improve basin performance and support corporate water stewardship initiatives.

We quantify how rain is captured, slowed, and returned—turning distributed Green Stormwater Infrastructure into measurable, local impact.

Rain built the Pacific Northwest. Now it can build what’s next.

Partner With Shoalwater

A light, scalable climate-tech model for translating verified Green Stormwater Infrastructure into healthier watersheds and clearer stewardship signals.

Basin-specific
Verified GSI
Corporate-ready
How
Watershed Flow
Healthier Basins
Dashboard Signal Illustrative

Basin Stewardship Index

Illustrative metrics showing how distributed GSI can be quantified at the basin level.

Stormwater Managed 18.4M gal Illustrative basin-wide aggregation
771 Systems
5 Basins
Basin Performance Capacity
Green Roofs + Cisterns Capture at source Slowing peak rainfall events
Rain Gardens Neighborhood infiltration Filtering runoff before it moves
Permeable Streets + Trees Distributed basin network Connecting local systems downstream

Basin Stewardship Index

The Basin Stewardship Index is the measurement layer for distributed Green Stormwater Infrastructure—turning captured, slowed, and retained rainfall into a shared view of basin performance.

It connects upstream systems to downstream watershed outcomes, making water stewardship visible, comparable, and easier to scale across real basins.

Where water stewardship becomes measurable.
A clearer signal for how local infrastructure contributes to healthier basin performance over time.

Why

Flooding, runoff pollution, and aging infrastructure are putting growing pressure on local watersheds & inhabitants. At the same time, water stewardship commitments are rising—but often remain disconnected from where water actually moves.

Reduce flood pressure Slow runoff before it overwhelms local systems.
Improve water quality Retain pollution at the source, not downstream.
Strengthen basins Support healthier, more resilient watershed function.

GSI

Green Stormwater Infrastructure captures and filters rain where it falls. Measured and connected across a basin, these distributed systems move from low impact to high impact—creating meaningful local outcomes.

From low impact development to high impact basin performance.

Capture rain Retain, slow, and infiltrate stormwater locally.
Retain pollution Reduce runoff pollution and downstream loading.
Improve basin health Translate everyday infrastructure into visible watershed benefit.

From rain to basin performance

Shoalwater turns distributed water infrastructure into a measurable system—connecting rainfall, quantification, and basin outcomes in one scalable stewardship model.

01 Capture Rain is retained, slowed, and filtered through Green Stormwater Infrastructure.
02 Quantify Stormwater performance is measured across verified systems.
03 Aggregate Distributed impact is connected into basin-specific performance.
04 Improve More managed stormwater supports healthier, more resilient watersheds.

Turn your system into measurable impact

If you already operate Green Stormwater Infrastructure, you're part of the solution—now it can be measured, connected, and amplified.

Register your system Share basic details about your GSI installation.
Verify + quantify We translate your infrastructure into measurable stormwater performance.
Join the basin Your system contributes to aggregated watershed outcomes.
Generate impact signal Your infrastructure becomes part of measurable water stewardship.
More systemsStronger basin performance
More dataClearer stewardship signal
More participationAccelerated impact

Built for participation

Shoalwater is designed for corporations, municipalities, communities, and partners who want a clearer, local pathway into measurable water outcomes.

Corporations Advance water stewardship initiatives with measurable, local basin impact.
Municipalities Understand and strengthen infrastructure performance across watersheds.
Communities Contribute to and benefit from healthier local water systems.
Partners Support scalable, performance-based stewardship built on real infrastructure.

From compliance → to performance
From isolated systems → to connected basins
From intention → to measurable outcomes

Measured stormwater managed = healthier watersheds
Built for basin performance, designed for climate-ready participation

Shoalwater is infrastructure for how water stewardship works—local, measurable, and built to scale.

A brighter model for climate-ready water infrastructure, designed to make basin performance legible and participation easier to grow.

Partner With Shoalwater

Contact: cesar@shoalwater.earth

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