IDEASBERG_

INDEX / MEDIA

VERDICT: BUILDBERG SCORE 74/100

Tap Water Quality Directory

A public-data-powered directory showing tap water quality by location, monetized via display ads and Amazon affiliate links to water filters.

▶ WATCH THE SOURCE SEGMENT — Claude Code built me a $273/Day online directory

01 THE IDEA

Sourced entirely from free public government databases (like data.gov), a tap water quality directory requires zero data acquisition cost and can rank for thousands of hyperlocal queries like 'tap water quality [city]'. A community member built one starting in November with zero backlinks and reached 40,000+ monthly visitors, getting accepted into Mediavine (premium display ad network) and earning Amazon affiliate commissions on water filter recommendations.

The insight here is that government public data is abundant but buried in terrible UIs — building a clean, user-friendly front-end on top of it creates immediate SEO value and user utility. The model is 'boring public data + clean presentation + affiliate monetization.' It's a capital-efficient, nearly zero-cost build that compounds via SEO without needing outbound sales or a B2B monetization strategy.

02 THE NUMBERS

EXPECTED ARR

$12K – $60K

INITIAL INVESTMENT

$100 + 30h

MONTHLY BURN

$20 + 4h

AUTOMATION

9/10

COMPETITORS

4 · GROWING →

SKILLS

Claude Code / vibe coding, SEO basics, public data sourcing, affiliate marketing setup

03 THE VERDICT

Real-world proof exists: 40k monthly visitors from zero backlinks in a few months is exceptional velocity for an SEO-first play. The data is free, the build cost is near-zero, and the monetization (ads + affiliate) is passive and well-established. The only risk is Google algorithm changes, but government-data-sourced directories tend to be treated as authoritative. This is an excellent first directory project.

04 THE FIELD

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