Maryland Water Quality
Drinking water data for all 24 counties.
Avg Water Score
99.9
State Grade
A
Counties with Data
24
of 24 total
All Maryland Counties
| County | Water Score |
|---|---|
| Anne Arundel County | 100.0 |
| Baltimore city | 100.0 |
| Carroll County | 100.0 |
| Charles County | 100.0 |
| Frederick County | 100.0 |
| Harford County | 100.0 |
| Howard County | 100.0 |
| Montgomery County | 100.0 |
| Prince George's County | 100.0 |
| St. Mary's County | 100.0 |
| Washington County | 100.0 |
| Allegany County | 99.9 |
| Calvert County | 99.9 |
| Dorchester County | 99.9 |
| Garrett County | 99.9 |
| Kent County | 99.9 |
| Worcester County | 99.9 |
| Queen Anne's County | 99.8 |
| Somerset County | 99.8 |
| Wicomico County | 99.8 |
| Talbot County | 99.7 |
| Baltimore County | 99.6 |
| Caroline County | 99.6 |
| Cecil County | 99.6 |
Concerned about your water quality?
Berkey water filters remove contaminants at home.
Sponsored
Data Source
Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.
Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.
Explore more data for Maryland
Property TaxCost of LivingComing SoonCrime RateIncomeComing SoonHealthSchoolsNatural Disaster RiskWeatherCounty Score