Ohio — 4th District
119th Congress · 127 ZIP codes · Avg score 55/100 · Grade C · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 127 ZIP codes in Ohio's 4th District: the district earns a grade C (55/100). 286 EPA violations on record, 56 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Ohio's 4th District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 43045 | Milford Center | 70 | B | 0 |
| 2 | 43310 | Belle Center | 70 | B | 0 |
| 3 | 44840 | Jeromesville | 70 | B | 0 |
| 4 | 44878 | Shiloh | 70 | B | 0 |
| 5 | 45306 | Botkins | 70 | B | 1 |
| 6 | 45845 | Fort Loramie | 70 | B | 0 |
| 7 | 43347 | Rushsylvania | 69 | C | 8 (1 health) |
| 8 | 43357 | West Liberty | 69 | C | 4 (1 health) |
| 9 | 43003 | Ashley | 68 | C | 1 |
| 10 | 43044 | Mechanicsburg | 68 | C | 1 |
| 11 | 44843 | Lucas | 68 | C | 1 |
| 12 | 45850 | Harrod | 68 | C | 1 |
| 13 | 43072 | Saint Paris | 67 | C | 4 |
| 14 | 43343 | Quincy | 67 | C | 3 |
| 15 | 45836 | Dunkirk | 67 | C | 3 |
| 16 | 45869 | New Bremen | 67 | C | 3 |
| 17 | 43041 | Marysville | 66 | C | 0 |
| 18 | 43315 | Cardington | 66 | C | 2 |
| 19 | 44838 | Hayesville | 66 | C | 0 |
| 20 | 44862 | Ontario | 66 | C | 0 |
| 21 | 44901 | Mansfield | 66 | C | 7 (4 health) |
| 22 | 44904 | Mansfield | 66 | C | 7 (4 health) |
| 23 | 44906 | Mansfield | 66 | C | 7 (4 health) |
| 24 | 44907 | Mansfield | 66 | C | 7 (4 health) |
| 25 | 45389 | Christiansburg | 66 | C | 1 |
| 26 | 45808 | Beaverdam | 66 | C | 0 |
| 27 | 45810 | Ada | 66 | C | 1 |
| 28 | 45887 | Spencerville | 66 | C | 2 |
| 29 | 43015 | Delaware | 65 | C | 0 |
| 30 | 43040 | Marysville | 65 | C | 0 |
| 31 | 43060 | North Lewisburg | 65 | C | 2 |
| 32 | 44805 | Ashland | 65 | C | 0 |
| 33 | 44864 | Perrysville | 65 | C | 5 |
| 34 | 45895 | Wapakoneta | 65 | C | 0 |
| 35 | 45896 | Waynesfield | 65 | C | 3 (1 health) |
| 36 | 43240 | Columbus | 64 | C | 7 (2 health) |
| 37 | 43326 | Kenton | 64 | C | 3 (1 health) |
| 38 | 43344 | Richwood | 64 | C | 10 (1 health) |
| 39 | 43348 | Russells Point | 64 | C | 2 |
| 40 | 45334 | Jackson Center | 64 | C | 4 |
| 41 | 45802 | Lima | 64 | C | 13 (2 health) |
| 42 | 43078 | Urbana | 63 | C | 7 (1 health) |
| 43 | 44880 | Sullivan | 63 | C | 0 |
| 44 | 45801 | Lima | 63 | C | 13 (2 health) |
| 45 | 45804 | Lima | 63 | C | 13 (2 health) |
| 46 | 45805 | Lima | 63 | C | 13 (2 health) |
| 47 | 45806 | Lima | 63 | C | 13 (2 health) |
| 48 | 45807 | Lima | 63 | C | 13 (2 health) |
| 49 | 43035 | Lewis Center | 62 | C | 7 |
| 50 | 43301 | Marion | 62 | C | 3 |
Overview
Ohio's 4th District encompasses 127 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (55/100).
286 EPA violations have been recorded across this district's water systems. 56 are health-based violations. About 43% 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 - 141 violations
- Stage 2 DBP Rule - 33 violations
- Consumer Confidence Report Rule - 25 violations
- Lead and Copper Rule - 23 violations
- Total Trihalomethanes (TTHM) - 17 violations
Housing Context
Homes in this district were built on average around 1961 (~65 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
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 127 ZIP codes in Ohio's 4th District.