Water stewardship, explained.

Water strategies often stop at reporting. Shoalwater enables measurable, basin-level impact.

We aggregate existing infrastructure, quantify stormwater managed, and enable water stewardship to scale across watersheds.

From commitments to real, local outcomes.

The Water Stewardship Index is Shoalwater’s system for aggregating distributed green infrastructure and quantifying stormwater managed at the basin level.

It connects individual systems to watershed-scale outcomes, making local impact visible, reportable, and scalable.

1 SWC = 1,000 gallons of stormwater managed.

Each SWC is basin-specific, time-bound, and tied to real infrastructure and modeled hydrologic impact.

Shoalwater is not built around abstract balancing. We focus on physical infrastructure, localized watershed impact, and measurable outcomes tied to place.

Stormwater runoff is a leading source of water pollution in urban areas. As rain moves across roofs, streets, and pavement, it picks up oil, metals, sediment, nutrients, and debris before entering local waterways.

Green stormwater infrastructure helps capture, slow, and filter that runoff. Shoalwater makes that impact measurable and scalable.

Examples include rain gardens, permeable pavement, cisterns, bioretention systems, and other green stormwater infrastructure that captures, infiltrates, stores, or slows runoff.

Water challenges are local. Basin-level accounting connects action to the watershed where risk, pollution, habitat pressure, and community outcomes actually occur.

Shoalwater uses standardized hydrologic modeling based on local rainfall data, system type, drainage area, and infrastructure characteristics such as retention or infiltration potential.

Shoalwater is designed to align with VWBA principles, AWS water stewardship concepts, and CDP Water Security reporting needs.

That means volumetric accounting, catchment-based logic, and reporting-friendly outputs.

Impact is modeled using standardized methods and can be strengthened over time with better system documentation, photos, inspection records, and municipal data sources where available.

Estimates are designed to be defensible and continuously improvable. Precision increases as additional inputs and verification layers are added.

Shoalwater provides basin-level data that can support CDP disclosures by helping organizations describe localized risk context, water-related actions, and measurable outcomes.

• W3: Basin-specific risk and opportunity context
• W4: Water stewardship actions and investments
• W5: Metrics and progress, including gallons managed

Shoalwater supports AWS-style water stewardship by enabling catchment-based, multi-stakeholder action with basin-level data and measurable infrastructure outcomes.

VWBA provides a recognized structure for quantifying volumetric water benefits. Shoalwater applies that logic to stormwater infrastructure, making managed gallons easier to communicate and report.

Shoalwater is built for companies with water stewardship goals, property owners with qualifying infrastructure, and public or watershed stakeholders seeking more visible local impact.

Property owners with green stormwater infrastructure, organizations pursuing basin-level water impact, and partners working in watershed restoration or stewardship can all participate in different ways.

For property owners, yes. Shoalwater currently measures impact from existing systems such as rain gardens, cisterns, and permeable surfaces.

Typically: property address, system type, approximate size or drainage area, and optionally photos or supporting documentation to improve modeling and future verification.

System data is used to model stormwater impact, assign basin-level contributions, and support stewardship reporting. Public-facing use should be clearly described in your privacy and participation terms.