Most people buy a water filter first, then wonder if it was the right one. That order is backwards.
Water quality varies by state, city, utility system, and even by neighborhood. A filter that makes sense for a Phoenix home on hard municipal water won’t help a rural Maine well owner with arsenic. Starting from your location and working toward treatment means fewer wrong purchases and better results.
Use this browse model to narrow your risk before buying tests or filters.
Interactive browser
1. Select state
2. Choose city or region
3. Confirm your water system
- Pull utility name from your water bill.
- Open your latest CCR and confirm system name.
- Check violation notices and trend lines, not just one-year values.
Use: How to read your water quality report
4. Triage contaminant and action path
- PFAS: contaminant hub -> treatment options
- Lead: contaminant hub -> treatment options
- Nitrates: contaminant hub -> treatment options
- Chromium-6: contaminant hub -> treatment options
Validate before you act
- Confirm utility-level context via EPA CCR Directory
- Compare health framing via EWG Tap Water Database
- Validate product claims through NSF Certified Listings