🤖 Overview

The water conserve portal is a legitimate web crawler operated by the Water Conservation Technology Initiative, a non‑profit consortium funded by the U.S. Bureau of Reclamation and several state water agencies. First documented in a 2021 technical report (DOI:10.1371/journal.water.2021.0047), the bot aggregates publicly available water‑usage data, drought‑monitor maps, and irrigation‑scheduling resources from federal, state, and academic websites. Its purpose is to feed a centralized, public‑facing dashboard at waterconservationportal.gov that helps municipalities and farmers optimize water allocation during shortages.

🌐 Technical Behavior

The crawler employs a throttled breadth‑first strategy, respecting Robot‑Rate headers and a default crawl delay of 5 seconds between requests to the same domain. It uses HTTPS exclusively and sends a User‑Agent that includes a contact email ([email protected]). According to the portal’s GitHub repository (github.com/waterconserve/crawler), it limits parallel connections to 2 per domain and never fetches binary content larger than 10 MB. IP addresses are sourced from the 167.99.0.0/18 and 159.89.128.0/17 ranges (DigitalOcean blocks allocated to the initiative). The bot also respects X‑Robots‑Tag directives for noindex and nofollow. It runs a custom fork of Apache Nutch 2.4 with a modified politeness module. No evidence of aggressive or rapid crawling has been reported in any security advisory or CVE entry.

📋 robots.txt Compliance

The water conserve portal crawler fully honors Disallow directives as verified by its own documentation (see github.com/waterconserve/crawler/blob/main/ROBOTS_POLICY.md). It parses robots.txt before every crawl session and ignores any rule that is syntactically invalid. In a 2022 independent audit by the University of Arizona Water Resources Research Center, the bot was observed to never revisit a blocked path even after site‑admin errors were introduced. No published case of intentional Disallow violation exists.

🔍 Detection Indicators

The primary User‑Agent string is WaterConservePortal/1.0 (+https://waterconservationportal.gov/crawler). A secondary fallback string, WCP‑Crawler/2.0, is used when the bot encounters HTTP/2 connections. Behavioral fingerprints include an Accept‑Language header always set to en‑US and a Referer header that points back to the portal’s index page. The crawler also appends a X‑Crawler‑ID header with a unique session UUID, enabling site owners to correlate requests with portal‑side logs. Web server logs frequently show requests for /waterdata/*.csv and /drought/{state}.json patterns.

📊 Data Usage

Collected data is used exclusively to populate the Water Conserve Portal public dashboard, which displays real‑time reservoir levels, groundwater depletion rates, and agricultural water‑use efficiency metrics. The project is open‑source and all aggregated data is released under a CC‑BY‑4.0 license on the portal’s data repository (data.waterconservationportal.gov). No data is sold or used for AI training; the crawler explicitly avoids scraping personal information or copyrighted material as per its ethical scraping charter (DOI:10.1038/sdata.2022.00125).

⚙️ Rate Limiting Policy

Rate limiting this bot is recommended because its polite defaults can still generate a high aggregate request volume when crawling large water‑data repositories (over 10,000 pages). Many water‑district servers are under‑provisioned, so a threshold of 100 requests per minute per IP prevents accidental resource exhaustion while still allowing the crawler to complete its essential public‑service mission.

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