South Carolina — 1st District
119th Congress · 55 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 55 ZIP codes in South Carolina's 1st District: the district earns a grade B (81/100). 66 EPA violations on record, 24 health-based.
Top Contaminants
ZIP Codes in This District
55 ZIP codes tracked in South Carolina's 1st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 29413 | Charleston | 99 | A | 0 |
| 2 | 29416 | Charleston | 99 | A | 0 |
| 3 | 29423 | Charleston | 99 | A | 0 |
| 4 | 29903 | Beaufort | 99 | A | 1 |
| 5 | 29904 | Beaufort | 99 | A | 1 |
| 6 | 29417 | Charleston | 95 | A | 0 |
| 7 | 29422 | Charleston | 95 | A | 0 |
| 8 | 29901 | Beaufort | 95 | A | 1 |
| 9 | 29905 | Beaufort | 95 | A | 1 |
| 10 | 29931 | Lobeco | 95 | A | 0 |
| 11 | 29436 | Cross | 94 | A | 3 (1 health) |
| 12 | 29465 | Mount Pleasant | 94 | A | 6 (1 health) |
| 13 | 29484 | Summerville | 94 | A | 5 (4 health) |
| 14 | 29453 | Jamestown | 93 | A | 1 |
| 15 | 29492 | Charleston | 90 | A | 0 |
| 16 | 29925 | Hilton Head Island | 90 | A | 0 |
| 17 | 29938 | Hilton Head Island | 90 | A | 0 |
| 18 | 29945 | Yemassee | 90 | A | 0 |
| 19 | 29915 | Daufuskie Island | 89 | A | 2 (1 health) |
| 20 | 29486 | Summerville | 86 | A | 5 (4 health) |
| 21 | 29445 | Goose Creek | 85 | A | 0 |
| 22 | 29906 | Beaufort | 85 | A | 1 |
| 23 | 29429 | Awendaw | 84 | B | 3 (1 health) |
| 24 | 29461 | Moncks Corner | 84 | B | 3 (1 health) |
| 25 | 29909 | Okatie | 84 | B | 1 (1 health) |
| 26 | 29940 | Seabrook | 84 | B | 3 |
| 27 | 29483 | Summerville | 81 | B | 5 (4 health) |
| 28 | 29456 | Ladson | 80 | B | 0 |
| 29 | 29482 | Sullivans Island | 80 | B | 0 |
| 30 | 29902 | Beaufort | 80 | B | 1 |
| 31 | 29466 | Mount Pleasant | 79 | B | 6 (1 health) |
| 32 | 29438 | Edisto Island | 78 | B | 4 |
| 33 | 29485 | Summerville | 76 | B | 5 (4 health) |
| 34 | 29412 | Charleston | 75 | B | 0 |
| 35 | 29439 | Folly Beach | 75 | B | 0 |
| 36 | 29451 | Isle Of Palms | 75 | B | 0 |
| 37 | 29926 | Hilton Head Island | 75 | B | 0 |
| 38 | 29928 | Hilton Head Island | 75 | B | 0 |
| 39 | 29464 | Mount Pleasant | 74 | B | 6 (1 health) |
| 40 | 29431 | Bonneau | 73 | B | 0 |
| 41 | 29446 | Green Pond | 73 | B | 0 |
| 42 | 29469 | Pinopolis | 73 | B | 0 |
| 43 | 29479 | Saint Stephen | 73 | B | 0 |
| 44 | 29914 | Dale | 73 | B | 0 |
| 45 | 29935 | Port Royal | 73 | B | 0 |
| 46 | 29434 | Cordesville | 66 | C | 0 |
| 47 | 29468 | Pineville | 66 | C | 0 |
| 48 | 29476 | Russellville | 66 | C | 0 |
| 49 | 29450 | Huger | 65 | C | 0 |
| 50 | 29487 | Wadmalaw Island | 65 | C | 0 |
Overview
South Carolina's 1st District encompasses 55 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (81/100).
66 EPA violations have been recorded across this district's water systems. 24 are health-based violations. About 40% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Surface Water Treatment Rule - 17 violations
- Haloacetic Acids (HAA5) - 16 violations
- Stage 2 DBP Rule - 14 violations
- Stage 1 DBP Rule - 8 violations
- Total Trihalomethanes (TTHM) - 6 violations
Housing Context
Homes in this district were built on average around 1994 (~32 years old). Most homes were built after lead pipe regulations were tightened.
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 55 ZIP codes in South Carolina's 1st District.