Maryland Water Alerts — 3 Active Issues
Data source: NWS, EPA SDWIS Last verified: 2026-04-30
3 active water-related issues in Maryland. Last updated: 2026-04-30.
Weather & Safety Alerts (3)
Active alerts from the National Weather Service that may affect water safety:
Coastal Flood Advisory — Minor
Areas: Anne Arundel
Coastal Flood Advisory issued April 30 at 3:11AM EDT until April 30 at 8:00AM EDT by NWS Baltimore MD/Washington DC
Expires: April 30, 2026
Coastal Flood Advisory — Minor
Areas: Southern Baltimore
Coastal Flood Advisory issued April 30 at 3:11AM EDT until April 30 at 8:00AM EDT by NWS Baltimore MD/Washington DC
Expires: April 30, 2026
Frost Advisory — Minor
Areas: Extreme Western Allegany; Western Garrett; Eastern Garrett; Eastern Highland; Eastern Grant; Western Mineral; Eastern Pendleton
Frost Advisory issued April 30 at 2:19AM EDT until May 1 at 8:00AM EDT by NWS Baltimore MD/Washington DC
Expires: April 30, 2026
High-Risk Areas (Forecast)
ZIP codes in Maryland with the highest probability of future violations:
| ZIP | City | 2-Year Probability | Trend |
|---|---|---|---|
| 20619 | California | 95% | increasing |
| 20622 | Charlotte Hall | 95% | declining |
| 20636 | Hollywood | 95% | stable |
| 20639 | Huntingtown | 95% | increasing |
| 20640 | Indian Head | 95% | declining |
| 20646 | La Plata | 95% | declining |
| 20650 | Leonardtown | 95% | increasing |
| 20653 | Lexington Park | 95% | increasing |
| 20657 | Lusby | 95% | declining |
| 20658 | Marbury | 95% | increasing |
Sources
- Weather alerts: National Weather Service
- Violations & enforcement: EPA SDWIS
- Compliance forecasts: ZipCheckup analysis
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