PurityMap
Search city, ZIP, contaminant⌘KFind my water
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.

Compare
Up to 3, side by side. No overall score, rank or verdict. Missing evidence stays missing.
Water systemGRAND ISLAND, CITY OFNE3107902 · NE
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.

FieldGRAND ISLAND, CITY OF
SystemGRAND ISLAND, CITY OF
PlaceGrand Island
Population served51,478
Source typeGroundwater
Record updated2026-09-16
Findings on record32
Above a listed reference4
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 · referenceGRAND ISLAND, CITY OF
Perfluorohexanesulfonic acid (PFHxS)10.0 ng/L federal MCL (2024)24.6ng/LAbove a reference
Perfluorooctanesulfonic acid (PFOS)4.0 ng/L federal MCL (2024)7.5ng/LAbove a reference
Lithium10.0 µg/L EPA health reference level (screening, not a legal limit)30.9µg/LAbove a reference
Uranium30 ug/L32UG/LAbove a reference
Perfluorobutanesulfonic acid (PFBS)2000.0 ng/L EPA health advisory (screening, not a legal limit)4.8ng/LDetected, within reference
Perfluoropentanoic acid (PFPeA)No federal or state limit; shown for transparency3.4ng/LDetected, no limit
Lead (90th percentile)15 µg/L federal action level1.98µg/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.

GRAND ISLAND, CITY OF →