Data source: EPA SDWIS Last verified: 2026-06-04

Water quality varies significantly across Louisville, KY. We analyzed 66 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.

City Overview: Grade C (65/100)

Grade	Neighborhoods	%
A	0	0%
B	6	9%
C	60	91%
D	0	0%
F	0	0%

Neighborhood Rankings

Every ZIP code in Louisville ranked by Home Safety Score:

Rank	ZIP Code	Score	Grade	Violations	Lead Risk
1	40201	83	B	0	0.0011 mg/L
2	40203	70	B	0	0.0011 mg/L
3	40210	70	B	0	0.0011 mg/L
4	40243	70	B	0	0.0011 mg/L
5	40251	70	B	0	0.0011 mg/L
6	40252	70	B	0	0.0011 mg/L
7	40221	66	C	0	0.0011 mg/L
8	40224	66	C	0	0.0011 mg/L
9	40225	66	C	0	0.0011 mg/L
10	40231	66	C	0	0.0011 mg/L
11	40232	66	C	0	0.0011 mg/L
12	40233	66	C	0	0.0011 mg/L
13	40250	66	C	0	0.0011 mg/L
14	40253	66	C	0	0.0011 mg/L
15	40255	66	C	0	0.0011 mg/L
16	40256	66	C	0	0.0011 mg/L
17	40257	66	C	0	0.0011 mg/L
18	40259	66	C	0	0.0011 mg/L
19	40261	66	C	0	0.0011 mg/L
20	40266	66	C	0	0.0011 mg/L
21	40268	66	C	0	0.0011 mg/L
22	40269	66	C	0	0.0011 mg/L
23	40270	66	C	0	0.0011 mg/L
24	40280	66	C	0	0.0011 mg/L
25	40281	66	C	0	0.0011 mg/L
26	40282	66	C	0	0.0011 mg/L
27	40283	66	C	0	0.0011 mg/L
28	40285	66	C	0	0.0011 mg/L
29	40287	66	C	0	0.0011 mg/L
30	40289	66	C	0	0.0011 mg/L
31	40290	66	C	0	0.0011 mg/L
32	40292	66	C	0	0.0011 mg/L
33	40293	66	C	0	0.0011 mg/L
34	40294	66	C	0	0.0011 mg/L
35	40295	66	C	0	0.0011 mg/L
36	40296	66	C	0	0.0011 mg/L
37	40297	66	C	0	0.0011 mg/L
38	40298	66	C	0	0.0011 mg/L
39	40202	65	C	0	0.0011 mg/L
40	40204	65	C	0	0.0011 mg/L
41	40208	65	C	0	0.0011 mg/L
42	40209	65	C	0	0.0011 mg/L
43	40211	65	C	0	0.0011 mg/L
44	40212	65	C	0	0.0011 mg/L
45	40215	65	C	0	0.0011 mg/L
46	40217	65	C	0	0.0011 mg/L
47	40223	65	C	0	0.0011 mg/L
48	40228	65	C	0	0.0011 mg/L
49	40229	65	C	0	0.0011 mg/L
50	40241	65	C	0	0.0011 mg/L
51	40242	65	C	0	0.0011 mg/L
52	40245	65	C	0	0.0011 mg/L
53	40291	65	C	0	0.0011 mg/L
54	40206	60	C	0	0.0011 mg/L
55	40220	60	C	0	0.0011 mg/L
56	40258	60	C	0	0.0011 mg/L
57	40272	60	C	0	0.0011 mg/L
58	40299	60	C	0	0.0011 mg/L
59	40205	55	C	0	0.0011 mg/L
60	40207	55	C	0	0.0011 mg/L
61	40213	55	C	0	0.0011 mg/L
62	40214	55	C	0	0.0011 mg/L
63	40216	55	C	0	0.0011 mg/L
64	40218	55	C	0	0.0011 mg/L
65	40219	55	C	0	0.0011 mg/L
66	40222	55	C	0	0.0011 mg/L

How Neighborhoods Compare

Each ZIP code compared to county and state averages:

• 53 neighborhoods score better than county average
• 13 neighborhoods score worse than county average

Frequently Asked Questions

What is the safest neighborhood in Louisville?

ZIP code 40201 has the highest safety score in Louisville at 83/100 (grade B). Check the full report for details.

Is Louisville water safe to drink?

Louisville has an average water safety score of 65/100 (C). Water quality varies by neighborhood — no ZIP codes currently exceed EPA lead limits. Always check your specific ZIP code.

Related Pages

• Louisville, KY city page
• Kentucky state rankings
• All Kentucky alerts

Data Sources

• EPA SDWIS
• U.S. Census Bureau

Updated daily.