CONGRESSIONAL DISTRICT IA

Iowa - 4th District

119th Congress · 357 ZIP codes · Avg score 62/100 · Grade C · Updated N/A

Data: EPA SDWIS / Census 119th Congress Last verified: N/A

ZipCheckup's versioned Home Safety Profile covers 357 ZIP codes in Iowa's 4th District: the measured model 4.0.0 average is Grade C (62/100). 119 EPA violations on record, 14 health-based.

C
District Grade
62
Avg Safety Score
357
ZIP Codes
119
Total Violations
14
Health Violations
79
Water Systems
Best ZIP: 50523 (67/100)
Lowest ZIP: 51108 (49/100)

Top Contaminants

Total Trihalomethanes (TTHM) (23) Haloacetic Acids (HAA5) (23) Consumer Confidence Report Rule (16) Copper (11) Stage 1 DBP Rule (11)

ZIP Codes in This District

100 ZIP codes tracked in Iowa's 4th District. Showing top 50 by safety score.

# ZIP Code City Safety Score Grade Violations
1 50523 Callender 67 C 0
2 50530 Dayton 67 C 0
3 50532 Duncombe 67 C 0
4 50536 Emmetsburg 67 C 0
5 50543 Gowrie 67 C 0
6 50544 Harcourt 67 C 0
7 50557 Lehigh 67 C 0
8 50566 Moorland 67 C 0
9 50569 Otho 67 C 0
10 51501 Council Bluffs 67 C 0
11 51503 Council Bluffs 67 C 0
12 51534 Glenwood 67 C 0
13 51576 Underwood 67 C 0
14 51054 Sergeant Bluff 66 C 2
15 51521 Avoca 66 C 1
16 51577 Walnut 66 C 1
17 50501 Fort Dodge 64 C 8
18 51510 Carter Lake 61 C 10
19 51101 Sioux City 49 D 2
20 51103 Sioux City 49 D 2
21 51104 Sioux City 49 D 2
22 51105 Sioux City 49 D 2
23 51106 Sioux City 49 D 2
24 51108 Sioux City 49 D 2
25 50005 Albion N/A N/A N/A
26 50010 Ames N/A N/A 4
27 50011 Ames N/A N/A N/A
28 50012 Ames N/A N/A 2
29 50013 Ames N/A N/A 2
30 50014 Ames N/A N/A 5 (1 health)
31 50025 Audubon N/A N/A 0
32 50031 Beaver N/A N/A N/A
33 50034 Blairsburg N/A N/A 0
34 50036 Boone N/A N/A 3 (3 health)
35 50037 Boone N/A N/A N/A
36 50040 Boxholm N/A N/A N/A
37 50041 Bradford N/A N/A N/A
38 50042 Brayton N/A N/A N/A
39 50046 Cambridge N/A N/A 0
40 50051 Clemons N/A N/A N/A
41 50055 Collins N/A N/A N/A
42 50056 Colo N/A N/A N/A
43 50058 Coon Rapids N/A N/A 0
44 50071 Dows N/A N/A N/A
45 50075 Ellsworth N/A N/A 0
46 50076 Exira N/A N/A N/A
47 50078 Ferguson N/A N/A N/A
48 50099 Boone N/A N/A N/A
49 50101 Galt N/A N/A N/A
50 50105 Gilbert N/A N/A 2

Overview

Iowa's 4th District encompasses 357 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (62/100).

119 EPA violations have been recorded across this district's water systems. 14 are health-based violations. About 30% of the 118 ZIP records with a reported violation count have at least one violation.

Top Contaminants

The most frequently cited water quality issues in this district:

  • Total Trihalomethanes (TTHM) - 23 violations
  • Haloacetic Acids (HAA5) - 23 violations
  • Consumer Confidence Report Rule - 16 violations
  • Copper - 11 violations
  • Stage 1 DBP Rule - 11 violations

Housing Context

Homes in this district were built on average around 1946 (~80 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.

Data Sources

Updated daily. Data covers 357 ZIP codes in Iowa's 4th District.

← Back to Iowa overview

How to cite this page

APA ZipCheckup. (2026). Iowa 4th District: 119 EPA Violations - C. https://zipcheckup.com/congressional/ia-4/
BibTeX
@misc{zipcheckup-congressional-ia-4,
  author = {{ZipCheckup}},
  title  = {{Iowa 4th District: 119 EPA Violations - C}},
  year   = {2026},
  url    = {https://zipcheckup.com/congressional/ia-4/}
}

Page version: August 2026.

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