Reports.wbwh Upd
The “Water‑Related Morbidity Index” (WRMI) – a composite of gastrointestinal, dermatological, and renal disease rates – is 1.8× higher in the surveyed tribal counties.
Rural tribal communities experience 2–3× higher risk of diarrheal disease during flood months due to limited access to certified point‑of‑use filtration.
19 % of sampled tribal water systems exceed EPA’s Maximum Contaminant Level (MCL) for arsenic, versus 4 % nationally.
