Highest Remediation Burden: Maryland — 2026

Out of 210 ZIP codes with data in Maryland, these are the areas where estimated safety remediation costs represent the largest share of median home value. See also: National Rankings | All Maryland Rankings

Statistic	Value
ZIP codes ranked	210
Highest burden	0.9% of median home value
Median burden	0.1% of median home value
Median estimated cost	$500
State	Maryland

Top 100 Highest Remediation Burden ZIP Codes

Rank	ZIP Code	City	State	Est. Cost	Median Home Value	Burden %
1	21223	Baltimore	MD	$800	$93,700	0.9%
2	21205	Baltimore	MD	$800	$94,900	0.8%
3	21540	Luke	MD	$300	$50,000	0.6%
4	21213	Baltimore	MD	$800	$134,900	0.6%
5	21229	Baltimore	MD	$1,100	$184,900	0.6%
6	21216	Baltimore	MD	$800	$148,800	0.5%
7	21562	Westernport	MD	$600	$113,200	0.5%
8	21217	Baltimore	MD	$800	$175,900	0.4%
9	21215	Baltimore	MD	$800	$189,900	0.4%
10	21239	Baltimore	MD	$800	$191,200	0.4%
11	21921	Elkton	MD	$1,200	$296,000	0.4%
12	21211	Baltimore	MD	$1,100	$274,000	0.4%
13	21222	Dundalk	MD	$800	$200,800	0.4%
14	21227	Halethorpe	MD	$1,100	$272,400	0.4%
15	21206	Baltimore	MD	$800	$213,700	0.4%
16	21201	Baltimore	MD	$800	$221,900	0.4%
17	21218	Baltimore	MD	$800	$229,800	0.4%
18	21207	Gwynn Oak	MD	$800	$248,400	0.3%
19	21214	Baltimore	MD	$800	$250,700	0.3%
20	21851	Pocomoke City	MD	$600	$186,700	0.3%
21	21901	North East	MD	$1,100	$342,800	0.3%
22	21052	Fort Howard	MD	$800	$268,300	0.3%
23	21221	Essex	MD	$800	$266,800	0.3%
24	21557	Rawlings	MD	$300	$99,900	0.3%
25	21220	Middle River	MD	$800	$279,900	0.3%
26	21234	Parkville	MD	$800	$276,000	0.3%
27	21237	Rosedale	MD	$800	$280,400	0.3%
28	21244	Windsor Mill	MD	$800	$271,200	0.3%
29	21224	Baltimore	MD	$800	$281,400	0.3%
30	21539	Lonaconing	MD	$300	$108,700	0.3%
31	21914	Charlestown	MD	$800	$300,600	0.3%
32	21133	Randallstown	MD	$800	$302,000	0.3%
33	21202	Baltimore	MD	$800	$307,700	0.3%
34	21208	Pikesville	MD	$800	$313,400	0.3%
35	21236	Nottingham	MD	$800	$306,800	0.3%
36	21804	Salisbury	MD	$600	$230,200	0.3%
37	21230	Baltimore	MD	$800	$327,700	0.2%
38	21231	Baltimore	MD	$800	$336,500	0.2%
39	21826	Fruitland	MD	$500	$211,200	0.2%
40	21157	Westminster	MD	$900	$394,100	0.2%
41	21521	Barton	MD	$300	$130,900	0.2%
42	21784	Sykesville	MD	$1,100	$478,200	0.2%
43	21117	Owings Mills	MD	$800	$370,700	0.2%
44	21212	Baltimore	MD	$800	$357,900	0.2%
45	21219	Sparrows Point	MD	$800	$370,800	0.2%
46	21811	Berlin	MD	$800	$362,500	0.2%
47	21903	Perryville	MD	$600	$271,700	0.2%
48	21136	Reisterstown	MD	$800	$380,200	0.2%
49	21210	Baltimore	MD	$1,100	$521,700	0.2%
50	21228	Catonsville	MD	$800	$389,200	0.2%
51	21702	Frederick	MD	$800	$384,800	0.2%
52	21801	Salisbury	MD	$600	$286,800	0.2%
53	20716	Bowie	MD	$800	$405,900	0.2%
54	20770	Greenbelt	MD	$500	$249,400	0.2%
55	21286	Towson	MD	$800	$402,000	0.2%
56	21001	Aberdeen	MD	$500	$267,400	0.2%
57	21128	Perry Hall	MD	$800	$424,200	0.2%
58	21209	Baltimore	MD	$800	$418,800	0.2%
59	21904	Port Deposit	MD	$600	$318,800	0.2%
60	21911	Rising Sun	MD	$600	$313,900	0.2%
61	20653	Lexington Park	MD	$600	$341,900	0.2%
62	20715	Bowie	MD	$800	$437,600	0.2%
63	21030	Cockeysville	MD	$800	$435,500	0.2%
64	21071	Glyndon	MD	$800	$451,800	0.2%
65	21788	Thurmont	MD	$600	$342,700	0.2%
66	21162	White Marsh	MD	$800	$463,400	0.2%
67	21532	Frostburg	MD	$300	$175,600	0.2%
68	21673	Trappe	MD	$600	$351,400	0.2%
69	21787	Taneytown	MD	$600	$344,800	0.2%
70	20613	Brandywine	MD	$800	$511,600	0.2%
71	20743	Capitol Heights	MD	$500	$317,100	0.2%
72	21087	Kingsville	MD	$800	$505,200	0.2%
73	21543	Midlothian	MD	$300	$186,000	0.2%
74	21632	Federalsburg	MD	$300	$192,800	0.2%
75	21703	Frederick	MD	$600	$364,300	0.2%
76	20710	Bladensburg	MD	$500	$335,000	0.1%
77	20720	Bowie	MD	$800	$545,800	0.1%
78	20746	Suitland	MD	$500	$325,000	0.1%
79	20747	District Heights	MD	$500	$325,400	0.1%
80	21085	Joppa	MD	$500	$327,300	0.1%
81	21659	Rhodesdale	MD	$300	$202,100	0.1%
82	20602	Waldorf	MD	$500	$360,800	0.1%
83	20737	Riverdale	MD	$500	$370,300	0.1%
84	20745	Oxon Hill	MD	$500	$351,500	0.1%
85	20748	Temple Hills	MD	$500	$355,600	0.1%
86	20784	Hyattsville	MD	$500	$356,500	0.1%
87	20785	Hyattsville	MD	$500	$346,000	0.1%
88	20886	Montgomery Village	MD	$500	$366,400	0.1%
89	21074	Hampstead	MD	$500	$349,900	0.1%
90	21204	Towson	MD	$800	$571,800	0.1%
91	21225	Brooklyn	MD	$300	$214,000	0.1%
92	21643	Hurlock	MD	$300	$220,000	0.1%
93	21713	Boonsboro	MD	$500	$348,300	0.1%
94	21756	Keedysville	MD	$500	$360,900	0.1%
95	20601	Waldorf	MD	$500	$380,700	0.1%
96	20722	Brentwood	MD	$500	$378,600	0.1%
97	20874	Germantown	MD	$500	$385,300	0.1%
98	21043	Ellicott City	MD	$800	$607,300	0.1%
99	21102	Manchester	MD	$500	$374,600	0.1%
100	21163	Woodstock	MD	$800	$598,700	0.1%

Methodology

The remediation burden ratio is calculated as: estimated remediation cost / median home value. Remediation costs are the sum of applicable safety measures for each ZIP code based on EPA, FEMA, and state data:

Lead service line replacement — cost included where area lead indicators (housing age, water system data, EPA sampling) are elevated; these do not confirm a home's service line
Radon home test - EPA zones are county-level potential categories, not home measurements; mitigation belongs only after a measured result
Whole-home water filtration — cost included where mapped water-system records exceed EPA guidelines; the right treatment depends on the contaminant
Flood insurance — in FEMA-designated flood zones with claim history
PFAS treatment — cost included where PFAS detections have been reported for mapped water systems; a detection alone does not show a home needs treatment

Median home values are from U.S. Census American Community Survey (ACS) estimates. Cost estimates use national average ranges from EPA, HUD, and industry data. Individual home costs may vary significantly based on specific conditions.

Last updated: 2026-10-19.

Frequently Asked Questions

What does "remediation cost relative to home value" mean?

This ratio compares the estimated cost of supported actions (lead pipes, a property-specific radon test, water filtration, and current flood-map verification) to the median home value in that ZIP code. County radon zones never add a mitigation-system cost.

How are remediation costs estimated?

Costs use published benchmarks for supported actions such as lead service line replacement, a property-specific radon test, and water filtration. A county radon zone does not trigger a mitigation-system estimate, and historical FEMA claims do not set an insurance premium.

Why does this matter for homebuyers?

In areas with high estimated remediation burden, the estimated cost of the listed measures can represent a large portion of the median home value; actual needs and costs vary by property. This is especially impactful in lower-value housing markets where a $15,000 remediation bill represents 10-30% of the home price. Standard home inspections may not identify all these issues.

Does a high ratio mean the home is unsafe?

Not necessarily. The ratio reflects potential costs based on area-level environmental data — not every home in the ZIP code will need all remediation work. However, buyers may want to review the underlying ZIP-level indicators and get property-specific inspections before purchasing.