North Carolina — 4th District
119th Congress · 35 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 35 ZIP codes in North Carolina's 4th District: the district earns a grade B (81/100). 979 EPA violations on record, 95 health-based.
Top Contaminants
ZIP Codes in This District
35 ZIP codes tracked in North Carolina's 4th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 27702 | Durham | 95 | A | 32 (2 health) |
| 2 | 27708 | Durham | 95 | A | 32 (2 health) |
| 3 | 27709 | Durham | 95 | A | 32 (2 health) |
| 4 | 27710 | Durham | 95 | A | 32 (2 health) |
| 5 | 27711 | Durham | 95 | A | 32 (2 health) |
| 6 | 27717 | Durham | 95 | A | 32 (2 health) |
| 7 | 27722 | Durham | 95 | A | 32 (2 health) |
| 8 | 27706 | Durham | 92 | A | 32 (2 health) |
| 9 | 27715 | Durham | 92 | A | 32 (2 health) |
| 10 | 27243 | Efland | 91 | A | 11 (1 health) |
| 11 | 27312 | Pittsboro | 88 | A | 7 (2 health) |
| 12 | 27701 | Durham | 87 | A | 32 (2 health) |
| 13 | 27703 | Durham | 87 | A | 32 (2 health) |
| 14 | 27713 | Durham | 87 | A | 32 (2 health) |
| 15 | 27510 | Carrboro | 86 | A | 7 (1 health) |
| 16 | 27502 | Apex | 82 | B | 13 (1 health) |
| 17 | 27523 | Apex | 82 | B | 13 (1 health) |
| 18 | 27539 | Apex | 82 | B | 13 (1 health) |
| 19 | 27704 | Durham | 82 | B | 32 (2 health) |
| 20 | 27705 | Durham | 82 | B | 32 (2 health) |
| 21 | 27707 | Durham | 82 | B | 32 (2 health) |
| 22 | 27712 | Durham | 82 | B | 32 (2 health) |
| 23 | 27278 | Hillsborough | 81 | B | 13 (1 health) |
| 24 | 27515 | Chapel Hill | 76 | B | 51 (10 health) |
| 25 | 27599 | Chapel Hill | 75 | B | 51 (10 health) |
| 26 | 27231 | Cedar Grove | 73 | B | 0 |
| 27 | 27503 | Bahama | 73 | B | 0 |
| 28 | 27562 | New Hill | 73 | B | 0 |
| 29 | 27516 | Chapel Hill | 71 | B | 51 (10 health) |
| 30 | 27519 | Cary | 69 | C | 129 (5 health) |
| 31 | 27540 | Holly Springs | 67 | C | 6 |
| 32 | 27517 | Chapel Hill | 66 | C | 51 (10 health) |
| 33 | 27514 | Chapel Hill | 61 | C | 51 (10 health) |
| 34 | 27560 | Morrisville | 55 | C | 0 |
| 35 | 27228 | Bynum | 53 | D | 0 |
Overview
North Carolina's 4th District encompasses 35 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (81/100).
979 EPA violations have been recorded across this district's water systems. 95 are health-based violations. About 86% 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 - 246 violations
- Stage 1 DBP Rule - 220 violations
- Lead and Copper Rule - 107 violations
- Consumer Confidence Report Rule - 99 violations
- Revised Total Coliform Rule - 73 violations
Housing Context
Homes in this district were built on average around 1993 (~33 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 35 ZIP codes in North Carolina's 4th District.