RainUSE Nexus

• 

  Example output with specified state and rainfall year

• 

  Example output with city filter

• 

  Example detail panel for a single facility

What It Does

RainUSE Nexus is a web-based prospecting engine that automatically identifies and ranks commercial and industrial buildings across the continental US by their viability for a Grundfos rainwater harvesting or water reuse system.

A user selects any US state and rainfall year, with optional city and min viability score filters, and the engine runs a multi-source data pipeline that produces a ranked list of 75 scanned facilities, each with a Viability Score from 0–100.

How the Viability Score Works

Each facility is scored across four dimensions:

• Physical (roof catchment area (sq ft)): 40 pts
• Cooling tower (inferred from NAICS industry code): 15 pts
• Financial (water utility cost tier by state): 20 pts
• Regulatory (NPDES permit status + violation history): 25 pts

Key Features

• State + city search - Prospect statewide or drill down to a specific city
• Roof area flagging - Buildings exceeding 100,000 sq ft are automatically highlighted
• Real rainfall - Annual precipitation fetched from Open-Meteo for the selected location and year, not hardcoded averages
• Detail panel - Click any facility for a full breakdown of every scoring factor
• Cooling tower detection - Inferred from NAICS industry codes (refineries, food processing, data centers, hospitals, etc.)
• ESG flagging - Facilities with compliance gaps are flagged as high-urgency targets

Tech Stack

Frontend: HTML, CSS, JavaScript Backend: Node.js + Express Hosting: Render.com APIs: EPA ECHO Rest API, Open-Meteo API, GeoNames API, OpenStreetMap Overpass API

Built With

• api
• css
• express.js
• html
• javascript
• node.js
• render.com