Side-by-side water intelligence
Compare water intelligence.
Put cities, states, water systems, or ZIP codes next to each other and read the measurable differences. PurityMap never combines them into a single winner or safety verdict.
How to compare
- Pick
- Cities, states, systems or ZIPs
- Add
- Up to 3, side by side
- Read
- Measured differences
No overall score, rank, or safety verdict. Missing evidence stays missing.
1 of 3 water systems selectedCompare the supplier records themselves: identity, evidence freshness and findings.
Side-by-sideScroll sideways on a narrow screen; the field column stays pinned so the rows always line up.
| Comparison field | City of Tempe AZ0407100 · AZ |
|---|---|
| Service area | Tempe |
| Population served | 165,000 |
| Primary source | Surface Water |
| Evidence freshnessThe latest stated reporting or verification date for this published system profile. | 2026-09-16 |
| Evidence records | 4 |
| Findings above a guideline | 3 |
Substance-by-substance evidence
Each cell keeps the published result and finding state. “No record” is different from “not detected.”
| Substance | City of Tempe |
|---|---|
| Perfluorooctane sulfonic acid (PFOS)Pfas | Above limit55.8 ng/L |
| Perfluorooctanoic acid (PFOA)Pfas | Above limit38.7 ng/L |
| Perfluorohexane sulfonic acid (PFHxS)Pfas | Above limit70.5 ng/L |
| Lead (90th percentile)Metals | Within limit4.4 µg/L |
Comparison boundary
Different monitoring periods, source types and coverage can limit direct comparison. Missing evidence stays missing; it is never scored as favorable, and nothing here is combined into an overall rank or safety verdict.