Iowa — 1st District
119th Congress · 230 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 230 ZIP codes in Iowa's 1st District: the district earns a grade C (58/100). 581 EPA violations on record, 18 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Iowa's 1st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 50044 | Bussey | 70 | B | 0 |
| 2 | 50119 | Harvey | 70 | B | 1 |
| 3 | 50135 | Kellogg | 70 | B | 1 |
| 4 | 50160 | Martensdale | 70 | B | 0 |
| 5 | 50225 | Pleasantville | 70 | B | 0 |
| 6 | 50268 | What Cheer | 70 | B | 0 |
| 7 | 52031 | Bellevue | 70 | B | 1 |
| 8 | 52201 | Ainsworth | 70 | B | 1 |
| 9 | 52309 | Monmouth | 70 | B | 0 |
| 10 | 52323 | Oxford Junction | 70 | B | 1 |
| 11 | 52353 | Washington | 70 | B | 0 |
| 12 | 52361 | Williamsburg | 70 | B | 1 |
| 13 | 52563 | Hedrick | 70 | B | 1 |
| 14 | 52625 | Donnellson | 70 | B | 0 |
| 15 | 52641 | Mount Pleasant | 70 | B | 0 |
| 16 | 52655 | West Burlington | 70 | B | 0 |
| 17 | 52733 | Clinton | 70 | B | 0 |
| 18 | 52742 | De Witt | 70 | B | 0 |
| 19 | 52772 | Tipton | 70 | B | 0 |
| 20 | 52773 | Walcott | 70 | B | 1 |
| 21 | 52774 | Welton | 70 | B | 0 |
| 22 | 50219 | Pella | 69 | C | 3 |
| 23 | 52639 | Montrose | 69 | C | 2 |
| 24 | 52748 | Eldridge | 69 | C | 2 |
| 25 | 52064 | Miles | 68 | C | 5 |
| 26 | 52247 | Kalona | 68 | C | 1 |
| 27 | 52577 | Oskaloosa | 68 | C | 4 |
| 28 | 52726 | Blue Grass | 68 | C | 1 |
| 29 | 52729 | Calamus | 68 | C | 2 |
| 30 | 52745 | Dixon | 68 | C | 0 |
| 31 | 52747 | Durant | 68 | C | 0 |
| 32 | 52752 | Grandview | 68 | C | 2 |
| 33 | 52777 | Wheatland | 68 | C | 1 |
| 34 | 52778 | Wilton | 68 | C | 0 |
| 35 | 52312 | Morley | 67 | C | 3 |
| 36 | 52637 | Mediapolis | 67 | C | 7 |
| 37 | 50062 | Melcher-dallas | 66 | C | 0 |
| 38 | 50118 | Hartford | 66 | C | 0 |
| 39 | 50139 | Lacona | 66 | C | 0 |
| 40 | 50153 | Lynnville | 66 | C | 0 |
| 41 | 50163 | Melcher-dallas | 66 | C | 0 |
| 42 | 50170 | Monroe | 66 | C | 0 |
| 43 | 50207 | New Sharon | 66 | C | 1 |
| 44 | 50208 | Newton | 66 | C | 6 |
| 45 | 50210 | New Virginia | 66 | C | 0 |
| 46 | 50228 | Prairie City | 66 | C | 0 |
| 47 | 50251 | Sully | 66 | C | 0 |
| 48 | 50252 | Swan | 66 | C | 0 |
| 49 | 52037 | Delmar | 66 | C | 0 |
| 50 | 52069 | Preston | 66 | C | 1 |
Overview
Iowa's 1st District encompasses 230 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (58/100).
581 EPA violations have been recorded across this district's water systems. 18 are health-based violations. About 46% 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 - 201 violations
- Surface Water Treatment Rule - 69 violations
- Lead and Copper Rule - 68 violations
- Lead - 68 violations
- Haloacetic Acids (HAA5) - 31 violations
Housing Context
Homes in this district were built on average around 1958 (~68 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 230 ZIP codes in Iowa's 1st District.