CONGRESSIONAL DISTRICT WA

Washington - 4th District

119th Congress · 93 ZIP codes · Avg score 73/100 · Grade B · Updated N/A

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

ZipCheckup's versioned Home Safety Profile covers 93 ZIP codes in Washington's 4th District: the measured model 4.0.0 average is Grade B (73/100). 708 EPA violations on record, 30 health-based.

B
District Grade
73
Avg Safety Score
93
ZIP Codes
708
Total Violations
30
Health Violations
67
Water Systems
Goldendale
Best ZIP: 98620 (83/100)
Moses Lake
Lowest ZIP: 98837 (50/100)

Top Contaminants

Lead (48) Consumer Confidence Report Rule (46) Surface Water Treatment Rule (40) Haloacetic Acids (HAA5) (27) Total Trihalomethanes (TTHM) (25)

ZIP Codes in This District

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

# ZIP Code City Safety Score Grade Violations
1 98620 Goldendale 83 B 0
2 98857 Warden 83 B 0
3 98948 Toppenish 83 B 2
4 98937 Naches 82 B 4
5 98942 Selah 82 B 3 (1 health)
6 98944 Sunnyside 82 B 5
7 99349 Mattawa 82 B 2 (1 health)
8 99301 Pasco 79 B 54
9 98902 Yakima 76 B 21
10 98903 Yakima 76 B 21
11 99353 West Richland 76 B 22
12 98930 Grandview 75 B 25 (1 health)
13 98901 Yakima 74 B 27 (1 health)
14 98908 Yakima 74 B 26 (1 health)
15 98936 Moxee 74 B 26 (1 health)
16 99350 Prosser 74 B 29
17 98951 Wapato 70 B 38 (1 health)
18 98841 Omak 67 C 2
19 98848 Quincy 67 C 132 (2 health)
20 99354 Richland 67 C 0
21 99336 Kennewick 66 C 2
22 99337 Kennewick 64 C 8 (1 health)
23 99338 Kennewick 61 C 39 (7 health)
24 99352 Richland 61 C 39 (7 health)
25 99320 Benton City 59 C 24
26 98837 Moses Lake 50 D 57
27 98602 Appleton N/A N/A 2
28 98613 Centerville N/A N/A 0
29 98617 Dallesport N/A N/A N/A
30 98619 Glenwood N/A N/A N/A
31 98623 Husum N/A N/A N/A
32 98628 Klickitat N/A N/A N/A
33 98635 Lyle N/A N/A N/A
34 98650 Trout Lake N/A N/A 2
35 98670 Wahkiacus N/A N/A N/A
36 98672 White Salmon N/A N/A 6 (1 health)
37 98673 Wishram N/A N/A N/A
38 98802 East Wenatchee N/A N/A 6
39 98812 Brewster N/A N/A 0
40 98813 Bridgeport N/A N/A N/A
41 98814 Carlton N/A N/A N/A
42 98819 Conconully N/A N/A N/A
43 98823 Ephrata N/A N/A 48
44 98824 George N/A N/A N/A
45 98827 Loomis N/A N/A 0
46 98829 Malott N/A N/A 3 (1 health)
47 98830 Mansfield N/A N/A N/A
48 98832 Marlin N/A N/A N/A
49 98833 Mazama N/A N/A N/A
50 98834 Methow N/A N/A N/A

Overview

Washington's 4th District encompasses 93 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (73/100).

708 EPA violations have been recorded across this district's water systems. 30 are health-based violations. About 82% of the 44 ZIP records with a reported violation count have at least one violation.

Top Contaminants

The most frequently cited water quality issues in this district:

  • Lead - 48 violations
  • Consumer Confidence Report Rule - 46 violations
  • Surface Water Treatment Rule - 40 violations
  • Haloacetic Acids (HAA5) - 27 violations
  • Total Trihalomethanes (TTHM) - 25 violations

Housing Context

Homes in this district were built on average around 1977 (~49 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 93 ZIP codes in Washington's 4th District.

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How to cite this page

APA ZipCheckup. (2026). Washington 4th District: 708 EPA Violations - B. https://zipcheckup.com/congressional/wa-4/
BibTeX 
@misc{zipcheckup-congressional-wa-4,
  author = {{ZipCheckup}},
  title  = {{Washington 4th District: 708 EPA Violations - B}},
  year   = {2026},
  url    = {https://zipcheckup.com/congressional/wa-4/}
}

Page version: August 2026.

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