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.
CompareUp to 3, side by side. No overall score, rank or verdict. Missing evidence stays missing.
Water systemFOX LAKEIL0970200 · IL
Add a second systemoptional
Identity
Side by side
BasisEach column shows its latest public record. Sample years can differ between columns, so compare with care.
| Field | FOX LAKE |
|---|---|
| System | FOX LAKE |
| Place | Fox Lake |
| Population served | 11,780 |
| Source type | Groundwater |
| Record updated | 2026-10-15 |
| Findings on record | 32 |
| Above a listed reference | 3 |
Substance by substance
Where the records differ
Detected results first. Each cell keeps the published result and its record state. “No record” is different from “not detected”.
- Above a reference
- Detected, within reference
- Not detected
- No record
| Substance · reference | FOX LAKE |
|---|---|
| Perfluorooctanesulfonic acid (PFOS)4.0 ng/L federal MCL (2024) | 5ng/LAbove a reference |
| Lithium10.0 µg/L EPA health reference level (screening, not a legal limit) | 10.6µg/LAbove a reference |
| Copper (90th percentile)1.3 mg/L federal action level | 1.58mg/LAbove a reference |
| Perfluoropentanoic acid (PFPeA)No federal or state limit; shown for transparency | 3.5ng/LDetected, no limit |
| Lead (90th percentile)15 µg/L federal action level | 3.2µg/LDetected, within reference |
Comparison boundary
Continue with one system.
Different monitoring periods, source types and coverage can limit direct comparison. Missing evidence stays missing; it is never scored as favourable, and nothing here is combined into an overall rank or safety verdict.