Pennsylvania — 4th District
119th Congress · 90 ZIP codes · Avg score 49/100 · Grade D · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 90 ZIP codes in Pennsylvania's 4th District: the district earns a grade D (49/100). 332 EPA violations on record, 21 health-based.
Top Contaminants
ZIP Codes in This District
90 ZIP codes tracked in Pennsylvania's 4th District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 19009 | Bryn Athyn | 73 | B | 0 |
| 2 | 19603 | Reading | 69 | C | 8 (1 health) |
| 3 | 19004 | Bala Cynwyd | 65 | C | 0 |
| 4 | 19012 | Cheltenham | 65 | C | 0 |
| 5 | 19072 | Narberth | 65 | C | 0 |
| 6 | 19444 | Lafayette Hill | 65 | C | 0 |
| 7 | 19510 | Blandon | 65 | C | 1 |
| 8 | 19612 | Reading | 65 | C | 8 (1 health) |
| 9 | 19435 | Frederick | 61 | C | 3 |
| 10 | 19562 | Topton | 61 | C | 10 (1 health) |
| 11 | 19027 | Elkins Park | 60 | C | 0 |
| 12 | 19095 | Wyncote | 60 | C | 0 |
| 13 | 19446 | Lansdale | 59 | C | 10 |
| 14 | 19512 | Boyertown | 59 | C | 2 |
| 15 | 19605 | Reading | 59 | C | 8 (1 health) |
| 16 | 19530 | Kutztown | 58 | C | 5 (2 health) |
| 17 | 19504 | Barto | 57 | C | 43 (2 health) |
| 18 | 19525 | Gilbertsville | 57 | C | 0 |
| 19 | 19404 | Norristown | 56 | C | 20 |
| 20 | 19473 | Schwenksville | 56 | C | 5 |
| 21 | 19522 | Fleetwood | 56 | C | 15 |
| 22 | 19555 | Shoemakersville | 56 | C | 4 (1 health) |
| 23 | 19006 | Huntingdon Valley | 55 | C | 0 |
| 24 | 19455 | North Wales | 54 | D | 16 |
| 25 | 19409 | Fairview Village | 53 | D | 0 |
| 26 | 19423 | Cedars | 53 | D | 0 |
| 27 | 19437 | Gwynedd Valley | 53 | D | 0 |
| 28 | 19451 | Mainland | 53 | D | 0 |
| 29 | 19454 | North Wales | 53 | D | 16 |
| 30 | 19472 | Sassamansville | 53 | D | 0 |
| 31 | 19477 | Spring House | 53 | D | 0 |
| 32 | 19481 | Valley Forge | 53 | D | 0 |
| 33 | 19486 | West Point | 53 | D | 0 |
| 34 | 19490 | Worcester | 53 | D | 0 |
| 35 | 19503 | Bally | 53 | D | 4 |
| 36 | 19519 | Earlville | 53 | D | 0 |
| 37 | 19533 | Leesport | 53 | D | 6 |
| 38 | 19538 | Maxatawny | 53 | D | 0 |
| 39 | 19539 | Mertztown | 53 | D | 0 |
| 40 | 19548 | Pine Forge | 53 | D | 0 |
| 41 | 19564 | Virginville | 53 | D | 0 |
| 42 | 19464 | Pottstown | 52 | D | 21 (3 health) |
| 43 | 19468 | Royersford | 52 | D | 24 (2 health) |
| 44 | 19518 | Douglassville | 51 | D | 2 |
| 45 | 19547 | Oley | 51 | D | 10 |
| 46 | 19046 | Jenkintown | 50 | D | 2 |
| 47 | 19002 | Ambler | 46 | D | 15 |
| 48 | 18074 | Perkiomenville | 45 | D | 0 |
| 49 | 19025 | Dresher | 45 | D | 0 |
| 50 | 19075 | Oreland | 45 | D | 0 |
Overview
Pennsylvania's 4th District encompasses 90 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is D (49/100).
332 EPA violations have been recorded across this district's water systems. 21 are health-based violations. About 34% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Contaminant 0700 - 99 violations
- Consumer Confidence Report Rule - 40 violations
- Haloacetic Acids (HAA5) - 22 violations
- Revised Total Coliform Rule - 22 violations
- Lead and Copper Rule - 19 violations
Housing Context
Homes in this district were built on average around 1966 (~60 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 3 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 90 ZIP codes in Pennsylvania's 4th District.