Maryland — 1st District
119th Congress · 159 ZIP codes · Avg score 69/100 · Grade C · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 159 ZIP codes in Maryland's 1st District: the district earns a grade C (69/100). 302 EPA violations on record, 69 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Maryland's 1st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 21606 | Easton | 99 | A | 0 |
| 2 | 21610 | Betterton | 99 | A | 0 |
| 3 | 21623 | Church Hill | 98 | A | 2 (1 health) |
| 4 | 21668 | Sudlersville | 98 | A | 2 |
| 5 | 21690 | Chestertown | 98 | A | 2 (1 health) |
| 6 | 21850 | Pittsville | 98 | A | 3 |
| 7 | 21682 | Ridgely | 97 | A | 5 |
| 8 | 21683 | Ridgely | 97 | A | 5 |
| 9 | 21688 | Ridgely | 97 | A | 5 |
| 10 | 21657 | Queen Anne | 95 | A | 0 |
| 11 | 21664 | Secretary | 95 | A | 0 |
| 12 | 21830 | Hebron | 95 | A | 0 |
| 13 | 21869 | Vienna | 95 | A | 0 |
| 14 | 21875 | Delmar | 95 | A | 0 |
| 15 | 21629 | Denton | 94 | A | 6 (1 health) |
| 16 | 21849 | Parsonsburg | 94 | A | 2 (1 health) |
| 17 | 21874 | Willards | 94 | A | 5 (1 health) |
| 18 | 21624 | Claiborne | 93 | A | 9 (2 health) |
| 19 | 21660 | Ridgely | 93 | A | 5 |
| 20 | 21843 | Ocean City | 93 | A | 11 (2 health) |
| 21 | 21861 | Sharptown | 93 | A | 3 (2 health) |
| 22 | 21643 | Hurlock | 92 | A | 2 (1 health) |
| 23 | 21826 | Fruitland | 92 | A | 2 |
| 24 | 21631 | East New Market | 90 | A | 1 |
| 25 | 21841 | Newark | 90 | A | 4 |
| 26 | 21617 | Centreville | 89 | A | 5 (1 health) |
| 27 | 21639 | Greensboro | 89 | A | 21 (1 health) |
| 28 | 21655 | Preston | 89 | A | 3 (1 health) |
| 29 | 21813 | Bishopville | 89 | A | 2 |
| 30 | 21863 | Snow Hill | 89 | A | 2 (1 health) |
| 31 | 21632 | Federalsburg | 88 | A | 9 (2 health) |
| 32 | 21645 | Kennedyville | 88 | A | 1 (1 health) |
| 33 | 21651 | Millington | 88 | A | 2 |
| 34 | 21851 | Pocomoke City | 86 | A | 6 (4 health) |
| 35 | 21601 | Easton | 85 | A | 0 |
| 36 | 21620 | Chestertown | 84 | B | 2 (1 health) |
| 37 | 21902 | Perry Point | 83 | B | 0 |
| 38 | 21916 | Childs | 82 | B | 2 (1 health) |
| 39 | 21619 | Chester | 80 | B | 9 (2 health) |
| 40 | 21613 | Cambridge | 79 | B | 2 (1 health) |
| 41 | 21654 | Oxford | 79 | B | 4 (1 health) |
| 42 | 21638 | Grasonville | 78 | B | 4 (2 health) |
| 43 | 21661 | Rock Hall | 78 | B | 1 |
| 44 | 21811 | Berlin | 78 | B | 1 |
| 45 | 21919 | Earleville | 77 | B | 2 (1 health) |
| 46 | 21658 | Queenstown | 76 | B | 6 |
| 47 | 21922 | Elkton | 76 | B | 7 (2 health) |
| 48 | 21911 | Rising Sun | 74 | B | 2 (1 health) |
| 49 | 21161 | White Hall | 73 | B | 0 |
| 50 | 21627 | Crocheron | 73 | B | 0 |
Overview
Maryland's 1st District encompasses 159 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (69/100).
302 EPA violations have been recorded across this district's water systems. 69 are health-based violations. About 37% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Stage 2 DBP Rule - 104 violations
- Stage 1 DBP Rule - 50 violations
- Consumer Confidence Report Rule - 42 violations
- Surface Water Treatment Rule - 35 violations
- Lead - 22 violations
Housing Context
Homes in this district were built on average around 1973 (~53 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 6 ZIP codes in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.
Data Sources
- Water quality violations: EPA Safe Drinking Water Information System (SDWIS)
- Congressional district boundaries: U.S. Census Bureau, 119th Congress
- Housing age: U.S. Census Bureau American Community Survey
Updated daily. Data covers 159 ZIP codes in Maryland's 1st District.