Drinking water alert statistics
All figures below are computed directly from the published Watereport alert database at page load. Last computed: .
81
Active alerts
41
New in last 7 days
245
New in last 30 days
353
Published alerts total
Most common event types
| Event type | Alerts |
|---|---|
| Notice | 314 |
| Boil water advisory | 283 |
| Microbiological contamination | 228 |
| infrastructure | 163 |
| Limit value exceeded | 132 |
| Chemical contamination | 65 |
| boil_water | 2 |
| bacteria | 2 |
| chlorination | 1 |
Countries with the most alerts
Method: counts include every published alert in the Watereport database; an alert counts as active while its status is active. Time windows use the first-seen timestamp of each alert. Coverage depends on what authorities, utilities and local media publish; see the methodology page. Data collection starts 2026-06-12.