[
  {
    "category": "Composite score diverges from an underlying signal",
    "count": 6226
  },
  {
    "category": "Concentrated enforcement activity",
    "count": 9045
  },
  {
    "category": "Elevated readings near schools",
    "count": 236
  },
  {
    "category": "Elevated readings with no violation on record",
    "count": 485
  },
  {
    "category": "Higher-income ZIPs with elevated readings",
    "count": 1579
  },
  {
    "category": "Infrastructure age inconsistent with risk profile",
    "count": 12
  },
  {
    "category": "Lower-risk ZIPs amid higher-risk neighbors",
    "count": 1497
  },
  {
    "category": "Multiple overlapping risks in one ZIP",
    "count": 11
  },
  {
    "category": "PFAS exceedance clusters (adjacent ZIPs)",
    "count": 548
  },
  {
    "category": "Sharp period-over-period score change",
    "count": 3512
  }
]