Maryland Drinking Water Violations
3,123Water Systems
14,119Total Violations
1,426Health-Based
Maryland has 3,123 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 1,426 health-based violations out of 14,119 total violations recorded. Currently, 40 water systems have unresolved health-based violations.
The most frequently cited health-based contaminants in Maryland are Unknown, Unknown, and Unknown. Health-based violations mean a water system exceeded an EPA maximum contaminant level (MCL) or failed required treatment standards.
Browse the counties below to find specific water systems, or search by address or ZIP code to find your water provider.
Counties
| County | Water Systems | Total Violations | Health-Based |
|---|---|---|---|
| Calvert County | 3 | 1 | 1 |
| Queen Anne's County | 3 | 1 | 0 |
| Allegany County | 2 | 0 | 0 |
| Anne Arundel County | 1 | 0 | 0 |
| Carroll County | 5 | 0 | 0 |
| Cecil County | 3 | 0 | 0 |
| Dorchester County | 2 | 0 | 0 |
| Frederick County | 1 | 0 | 0 |
| Garrett County | 1 | 0 | 0 |
| Harford County | 1 | 0 | 0 |
| Prince George's County | 1 | 0 | 0 |
| Washington County | 1 | 0 | 0 |
| Worcester County | 1 | 0 | 0 |