ZIP Codes with Most EPA Violations in District of Co...

Out of 274 ZIP codes with data in District of Columbia, these are the highest-ranked areas for violations. See also: National ZIP Codes with Most EPA Water Violations | All District of Columbia Rankings

Statistic	Value
ZIP codes ranked	274
Highest value	33
Median value	33
State	District of Columbia

Top 100 Worst ZIP Codes

Rank	ZIP Code	City	State	Violations	Safety Score
1	20001	Washington	DC	33	67/100
2	20002	Washington	DC	33	67/100
3	20003	Washington	DC	33	72/100
4	20004	Washington	DC	33	72/100
5	20005	Washington	DC	33	72/100
6	20006	Washington	DC	33	72/100
7	20007	Washington	DC	33	62/100
8	20008	Washington	DC	33	67/100
9	20009	Washington	DC	33	67/100
10	20010	Washington	DC	33	67/100
11	20011	Washington	DC	33	67/100
12	20012	Washington	DC	33	67/100
13	20013	Washington	DC	33	69/100
14	20015	Washington	DC	33	67/100
15	20016	Washington	DC	33	67/100
16	20017	Washington	DC	33	67/100
17	20018	Washington	DC	33	67/100
18	20019	Washington	DC	33	62/100
19	20020	Washington	DC	33	67/100
20	20022	Washington	DC	33	69/100
21	20023	Washington	DC	33	69/100
22	20024	Washington	DC	33	72/100
23	20026	Washington	DC	33	69/100
24	20027	Washington	DC	33	72/100
25	20029	Washington	DC	33	69/100
26	20030	Washington	DC	33	69/100
27	20032	Washington	DC	33	72/100
28	20033	Washington	DC	33	69/100
29	20035	Washington	DC	33	69/100
30	20036	Washington	DC	33	72/100
31	20037	Washington	DC	33	72/100
32	20038	Washington	DC	33	69/100
33	20039	Washington	DC	33	69/100
34	20040	Washington	DC	33	69/100
35	20041	Washington	DC	33	69/100
36	20042	Washington	DC	33	69/100
37	20043	Washington	DC	33	69/100
38	20044	Washington	DC	33	69/100
39	20045	Washington	DC	33	69/100
40	20046	Washington	DC	33	69/100
41	20047	Washington	DC	33	69/100
42	20049	Washington	DC	33	69/100
43	20050	Washington	DC	33	69/100
44	20051	Washington	DC	33	69/100
45	20052	Washington	DC	33	69/100
46	20053	Washington	DC	33	69/100
47	20055	Washington	DC	33	69/100
48	20056	Washington	DC	33	69/100
49	20057	Washington	DC	33	69/100
50	20058	Washington	DC	33	69/100
51	20059	Washington	DC	33	69/100
52	20060	Washington	DC	33	69/100
53	20061	Washington	DC	33	69/100
54	20062	Washington	DC	33	69/100
55	20063	Washington	DC	33	69/100
56	20064	Washington	DC	33	69/100
57	20065	Washington	DC	33	69/100
58	20066	Washington	DC	33	69/100
59	20067	Washington	DC	33	69/100
60	20068	Washington	DC	33	69/100
61	20069	Washington	DC	33	69/100
62	20070	Washington	DC	33	69/100
63	20071	Washington	DC	33	69/100
64	20073	Washington	DC	33	69/100
65	20074	Washington	DC	33	69/100
66	20075	Washington	DC	33	69/100
67	20076	Washington	DC	33	69/100
68	20077	Washington	DC	33	69/100
69	20078	Washington	DC	33	69/100
70	20080	Washington	DC	33	69/100
71	20081	Washington	DC	33	69/100
72	20082	Washington	DC	33	69/100
73	20088	Washington	DC	33	69/100
74	20090	Washington	DC	33	69/100
75	20091	Washington	DC	33	69/100
76	20097	Washington	DC	33	69/100
77	20098	Washington	DC	33	69/100
78	20201	Washington	DC	33	69/100
79	20202	Washington	DC	33	69/100
80	20203	Washington	DC	33	69/100
81	20204	Washington	DC	33	69/100
82	20206	Washington	DC	33	69/100
83	20207	Washington	DC	33	69/100
84	20208	Washington	DC	33	69/100
85	20210	Washington	DC	33	69/100
86	20211	Washington	DC	33	69/100
87	20212	Washington	DC	33	69/100
88	20213	Washington	DC	33	69/100
89	20214	Washington	DC	33	69/100
90	20215	Washington	DC	33	69/100
91	20216	Washington	DC	33	69/100
92	20217	Washington	DC	33	69/100
93	20218	Washington	DC	33	69/100
94	20219	Washington	DC	33	69/100
95	20220	Washington	DC	33	69/100
96	20221	Washington	DC	33	69/100
97	20222	Washington	DC	33	69/100
98	20223	Washington	DC	33	69/100
99	20224	Washington	DC	33	69/100
100	20226	Washington	DC	33	69/100

Methodology

Violation counts include all types recorded in the EPA SDWIS database: Maximum Contaminant Level (MCL) violations, treatment technique violations, and monitoring/reporting violations. Both resolved and unresolved violations are counted. Higher counts may reflect longer system histories or larger service areas.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-06-04.

Frequently Asked Questions

What counts as an EPA water violation?

EPA violations include exceeding Maximum Contaminant Levels (MCLs), failing to treat water properly (treatment technique violations), and not testing or reporting on schedule (monitoring violations). Health-based violations are the most serious.

Does a high violation count mean the water is unsafe now?

Not necessarily. Many violations are historical or monitoring-related. However, a pattern of repeated violations indicates systemic issues with water system management or infrastructure.