New Jersey — 7th District
119th Congress · 102 ZIP codes · Avg score 50/100 · Grade D · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 102 ZIP codes in New Jersey's 7th District: the district earns a grade D (50/100). 372 EPA violations on record, 29 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in New Jersey's 7th District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 08556 | Rosemont | 70 | B | 1 |
| 2 | 08557 | Sergeantsville | 69 | C | 2 |
| 3 | 07857 | Netcong | 68 | C | 1 |
| 4 | 07902 | Summit | 67 | C | 2 |
| 5 | 07930 | Chester | 66 | C | 9 (1 health) |
| 6 | 07820 | Allamuchy | 65 | C | 8 (1 health) |
| 7 | 07439 | Ogdensburg | 64 | C | 6 |
| 8 | 07065 | Rahway | 63 | C | 1 |
| 9 | 07875 | Stillwater | 63 | C | 0 |
| 10 | 07877 | Swartswood | 63 | C | 0 |
| 11 | 07881 | Wallpack Center | 63 | C | 0 |
| 12 | 07844 | Hope | 62 | C | 5 |
| 13 | 07821 | Andover | 61 | C | 6 |
| 14 | 07901 | Summit | 61 | C | 2 |
| 15 | 07882 | Washington | 60 | C | 0 |
| 16 | 07871 | Sparta | 59 | C | 27 (3 health) |
| 17 | 08826 | Glen Gardner | 58 | C | 20 (4 health) |
| 18 | 07803 | Mine Hill | 57 | C | 8 |
| 19 | 08822 | Flemington | 57 | C | 4 |
| 20 | 08829 | High Bridge | 57 | C | 7 |
| 21 | 08867 | Pittstown | 57 | C | 4 |
| 22 | 08804 | Bloomsbury | 56 | C | 6 |
| 23 | 07069 | Watchung | 55 | C | 0 |
| 24 | 07092 | Mountainside | 55 | C | 0 |
| 25 | 07924 | Bernardsville | 55 | C | 0 |
| 26 | 07933 | Gillette | 55 | C | 0 |
| 27 | 07946 | Millington | 55 | C | 0 |
| 28 | 08530 | Lambertville | 54 | D | 9 (1 health) |
| 29 | 07829 | Buttzville | 53 | D | 0 |
| 30 | 07831 | Changewater | 53 | D | 0 |
| 31 | 07833 | Delaware | 53 | D | 0 |
| 32 | 07838 | Great Meadows | 53 | D | 0 |
| 33 | 07839 | Greendell | 53 | D | 0 |
| 34 | 07843 | Hopatcong | 53 | D | 6 |
| 35 | 07852 | Ledgewood | 53 | D | 0 |
| 36 | 07855 | Middleville | 53 | D | 0 |
| 37 | 07876 | Succasunna | 53 | D | 0 |
| 38 | 07879 | Tranquility | 53 | D | 0 |
| 39 | 07934 | Gladstone | 53 | D | 0 |
| 40 | 07938 | Liberty Corner | 53 | D | 0 |
| 41 | 07939 | Lyons | 53 | D | 0 |
| 42 | 07970 | Mount Freedom | 53 | D | 0 |
| 43 | 07977 | Peapack | 53 | D | 0 |
| 44 | 08834 | Little York | 53 | D | 0 |
| 45 | 08858 | Oldwick | 53 | D | 0 |
| 46 | 08870 | Readington | 53 | D | 0 |
| 47 | 08885 | Stanton | 53 | D | 0 |
| 48 | 08887 | Three Bridges | 53 | D | 0 |
| 49 | 07832 | Columbia | 52 | D | 4 |
| 50 | 07840 | Hackettstown | 51 | D | 15 |
Overview
New Jersey's 7th District encompasses 102 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is D (50/100).
372 EPA violations have been recorded across this district's water systems. 29 are health-based violations. About 32% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Stage 1 DBP Rule - 100 violations
- Consumer Confidence Report Rule - 84 violations
- Surface Water Treatment Rule - 67 violations
- Revised Total Coliform Rule - 30 violations
- Total Coliform - 18 violations
Housing Context
Homes in this district were built on average around 1969 (~57 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 1 ZIP code 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 102 ZIP codes in New Jersey's 7th District.