Start with your ZIP code.
Find your water system fast.
Built for homeowners and renters who need answers quickly: what your utility reports, what your risk may be, and what filter types match your contaminants.
Data confidence varies by location. Always verify with your utility's official Consumer Confidence Report (CCR).
Choose your path
Task-first navigation inspired by EPA-style consumer workflows.
For Homeowners & Renters
Find my utility, contaminants, and next filter step
ZIP lookup, contaminant context, and treatment decision support in one flow.
For Region-Based Research
Browse state -> city -> system -> contaminant
Location-first flow to narrow likely water risks before testing.
For Utility/CCR Readers
Read your annual report the right way
Understand MCL, MCLG, violations, and what action to take before buying anything.
Browse by location to narrow risk
State -> City -> Water System -> Contaminant (WaterQ-style flow).
Browse by topic
Pick the area that fits your situation.
Your Water
Contaminants, sources, and what's in your tap or well.
Water Testing
At-home test kits and mail-in labs compared side by side.
Filters & Treatment
RO systems, softeners, whole-house filters -- which one works for your problem.
Well Water
Private wells aren't regulated. You're responsible for testing. Start here.
Learn
EPA limits, NSF standards, and how to read your water quality report.
Tools & Resources
Contaminant lookup, filter decision guide, and water quality references.
Data confidence and map caveat
Address and ZIP lookups are a starting point, not a legal determination of exposure. Service boundaries, private plumbing, and sampling schedules can change what reaches your tap.
Always confirm with your latest CCR and, when risk is meaningful, a certified lab test from your tap.
How we research
We prioritize primary sources: EPA rules, utility reports, NSF certifications, and named studies.
Methodology and ranking criteria are published in our review policy.