Oklahoma — 4th District
119th Congress · 119 ZIP codes · Avg score 79/100 · Grade B · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 119 ZIP codes in Oklahoma's 4th District: the district earns a grade B (79/100). 1,605 EPA violations on record, 557 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Oklahoma's 4th District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 73082 | Rush Springs | 99 | A | 0 |
| 2 | 73430 | Burneyville | 99 | A | 0 |
| 3 | 73433 | Elmore City | 99 | A | 0 |
| 4 | 73459 | Thackerville | 99 | A | 0 |
| 5 | 73551 | Hollister | 98 | A | 4 (1 health) |
| 6 | 74821 | Ada | 98 | A | 3 (1 health) |
| 7 | 74865 | Roff | 98 | A | 6 (1 health) |
| 8 | 73031 | Dibble | 97 | A | 2 (2 health) |
| 9 | 73145 | Oklahoma City | 95 | A | 2 |
| 10 | 73448 | Marietta | 95 | A | 0 |
| 11 | 74831 | Byars | 95 | A | 0 |
| 12 | 73065 | Newcastle | 94 | A | 2 |
| 13 | 73074 | Paoli | 94 | A | 19 (1 health) |
| 14 | 73086 | Sulphur | 94 | A | 2 (1 health) |
| 15 | 73093 | Washington | 94 | A | 8 (1 health) |
| 16 | 73456 | Ringling | 94 | A | 3 (1 health) |
| 17 | 73463 | Wilson | 94 | A | 4 (1 health) |
| 18 | 73543 | Geronimo | 94 | A | 7 (1 health) |
| 19 | 74872 | Stratford | 94 | A | 1 (1 health) |
| 20 | 73092 | Verden | 93 | A | 2 |
| 21 | 73569 | Terral | 93 | A | 9 (2 health) |
| 22 | 74871 | Stonewall | 93 | A | 11 (2 health) |
| 23 | 73032 | Dougherty | 91 | A | 5 (1 health) |
| 24 | 73095 | Wayne | 91 | A | 11 (1 health) |
| 25 | 73130 | Oklahoma City | 91 | A | 2 |
| 26 | 73165 | Oklahoma City | 91 | A | 2 |
| 27 | 73491 | Velma | 91 | A | 8 |
| 28 | 73503 | Fort Sill | 91 | A | 4 |
| 29 | 73506 | Lawton | 91 | A | 8 |
| 30 | 74825 | Allen | 91 | A | 2 (1 health) |
| 31 | 73010 | Blanchard | 90 | A | 13 (2 health) |
| 32 | 73055 | Marlow | 90 | A | 4 (2 health) |
| 33 | 73079 | Pocasset | 90 | A | 16 (1 health) |
| 34 | 73438 | Healdton | 90 | A | 0 |
| 35 | 74844 | Francis | 90 | A | 13 |
| 36 | 74820 | Ada | 89 | A | 3 (1 health) |
| 37 | 73443 | Lone Grove | 88 | A | 5 (1 health) |
| 38 | 73538 | Elgin | 88 | A | 16 (2 health) |
| 39 | 73019 | Norman | 87 | A | 32 (4 health) |
| 40 | 73039 | Davis | 87 | A | 14 (7 health) |
| 41 | 73502 | Lawton | 87 | A | 8 |
| 42 | 73557 | Medicine Park | 87 | A | 10 (1 health) |
| 43 | 73567 | Sterling | 87 | A | 2 (1 health) |
| 44 | 73067 | Ninnekah | 86 | A | 5 (1 health) |
| 45 | 73110 | Oklahoma City | 86 | A | 2 |
| 46 | 73160 | Oklahoma City | 86 | A | 2 |
| 47 | 73170 | Oklahoma City | 86 | A | 2 |
| 48 | 73173 | Oklahoma City | 86 | A | 2 |
| 49 | 74842 | Fittstown | 86 | A | 4 (2 health) |
| 50 | 73030 | Davis | 85 | A | 14 (7 health) |
Overview
Oklahoma's 4th District encompasses 119 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (79/100).
1605 EPA violations have been recorded across this district's water systems. 557 are health-based violations. About 80% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Consumer Confidence Report Rule - 411 violations
- Haloacetic Acids (HAA5) - 313 violations
- Revised Total Coliform Rule - 209 violations
- Stage 2 DBP Rule - 157 violations
- Fecal Coliform - 78 violations
Housing Context
Homes in this district were built on average around 1979 (~47 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 2 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 119 ZIP codes in Oklahoma's 4th District.