Highest Remediation Burden: California — 2026

Out of 774 ZIP codes with data in California, these are the areas where estimated safety remediation costs represent the largest share of median home value. See also: National Rankings | All California Rankings

Statistic	Value
ZIP codes ranked	774
Highest burden	1.1% of median home value
Median burden	0.1% of median home value
Median estimated cost	$600
State	California

Top 100 Highest Remediation Burden ZIP Codes

Rank	ZIP Code	City	State	Est. Cost	Median Home Value	Burden %
1	92408	San Bernardino	CA	$4,340	$407,300	1.1%
2	92321	Cedar Glen	CA	$4,740	$480,000	1.0%
3	92354	Loma Linda	CA	$4,280	$539,100	0.8%
4	93706	Fresno	CA	$1,200	$227,600	0.5%
5	95422	Clearlake	CA	$1,100	$206,300	0.5%
6	93307	Bakersfield	CA	$1,200	$238,400	0.5%
7	94501	Alameda	CA	$5,660	$1,213,100	0.5%
8	93725	Fresno	CA	$1,200	$262,400	0.5%
9	93247	Lindsay	CA	$1,200	$271,700	0.4%
10	93257	Porterville	CA	$1,200	$276,400	0.4%
11	92029	Escondido	CA	$3,740	$911,600	0.4%
12	93306	Bakersfield	CA	$1,200	$290,700	0.4%
13	93608	Cantua Creek	CA	$600	$144,800	0.4%
14	93308	Bakersfield	CA	$1,200	$298,000	0.4%
15	95365	Planada	CA	$900	$237,200	0.4%
16	93274	Tulare	CA	$1,100	$300,900	0.4%
17	92284	Yucca Valley	CA	$1,100	$314,500	0.4%
18	93292	Visalia	CA	$1,100	$330,600	0.3%
19	93614	Coarsegold	CA	$1,100	$355,100	0.3%
20	95341	Merced	CA	$900	$295,300	0.3%
21	95815	Sacramento	CA	$900	$298,400	0.3%
22	93701	Fresno	CA	$600	$207,600	0.3%
23	95351	Modesto	CA	$900	$315,700	0.3%
24	93702	Fresno	CA	$600	$211,900	0.3%
25	95205	Stockton	CA	$800	$288,600	0.3%
26	95824	Sacramento	CA	$900	$322,400	0.3%
27	92359	Mentone	CA	$1,100	$411,100	0.3%
28	93204	Avenal	CA	$600	$224,800	0.3%
29	93615	Cutler	CA	$600	$218,200	0.3%
30	93721	Fresno	CA	$600	$219,000	0.3%
31	96093	Weaverville	CA	$900	$335,800	0.3%
32	92320	Calimesa	CA	$1,100	$423,300	0.3%
33	93304	Bakersfield	CA	$600	$228,800	0.3%
34	93312	Bakersfield	CA	$1,100	$420,500	0.3%
35	93647	Orosi	CA	$600	$232,500	0.3%
36	93722	Fresno	CA	$900	$350,700	0.3%
37	95948	Gridley	CA	$900	$343,500	0.3%
38	96002	Redding	CA	$900	$347,500	0.3%
39	92220	Banning	CA	$800	$324,800	0.3%
40	92325	Crestline	CA	$900	$358,300	0.3%
41	92356	Lucerne Valley	CA	$600	$239,100	0.3%
42	93250	Mc Farland	CA	$600	$244,700	0.3%
43	93728	Fresno	CA	$600	$239,700	0.3%
44	96080	Red Bluff	CA	$800	$314,600	0.3%
45	93280	Wasco	CA	$600	$255,300	0.2%
46	93305	Bakersfield	CA	$600	$245,000	0.2%
47	93314	Bakersfield	CA	$1,200	$506,800	0.2%
48	93561	Tehachapi	CA	$900	$377,400	0.2%
49	93703	Fresno	CA	$600	$250,200	0.2%
50	93727	Fresno	CA	$900	$370,300	0.2%
51	95210	Stockton	CA	$800	$336,900	0.2%
52	95301	Atwater	CA	$900	$367,800	0.2%
53	95823	Sacramento	CA	$900	$372,100	0.2%
54	95828	Sacramento	CA	$900	$377,300	0.2%
55	96003	Redding	CA	$900	$370,500	0.2%
56	92256	Morongo Valley	CA	$600	$265,100	0.2%
57	92311	Barstow	CA	$500	$217,500	0.2%
58	92399	Yucaipa	CA	$1,100	$472,400	0.2%
59	93242	Laton	CA	$800	$347,400	0.2%
60	93301	Bakersfield	CA	$600	$264,300	0.2%
61	93609	Caruthers	CA	$600	$263,100	0.2%
62	95340	Merced	CA	$900	$383,200	0.2%
63	96001	Redding	CA	$900	$385,900	0.2%
64	92059	Pala	CA	$1,100	$506,600	0.2%
65	92374	Redlands	CA	$1,100	$494,000	0.2%
66	92410	San Bernardino	CA	$600	$273,700	0.2%
67	93618	Dinuba	CA	$600	$272,600	0.2%
68	93660	San Joaquin	CA	$600	$270,800	0.2%
69	93726	Fresno	CA	$600	$271,800	0.2%
70	95307	Ceres	CA	$900	$402,300	0.2%
71	95357	Modesto	CA	$900	$417,800	0.2%
72	93309	Bakersfield	CA	$600	$286,600	0.2%
73	93619	Clovis	CA	$1,200	$579,400	0.2%
74	93657	Sanger	CA	$800	$382,700	0.2%
75	93705	Fresno	CA	$600	$281,300	0.2%
76	95206	Stockton	CA	$800	$388,500	0.2%
77	95423	Clearlake Oaks	CA	$600	$285,300	0.2%
78	95825	Sacramento	CA	$900	$433,500	0.2%
79	95827	Sacramento	CA	$900	$419,500	0.2%
80	96007	Anderson	CA	$600	$284,800	0.2%
81	96058	Macdoel	CA	$300	$142,500	0.2%
82	92539	Anza	CA	$600	$298,000	0.2%
83	93263	Shafter	CA	$600	$301,900	0.2%
84	93620	Dos Palos	CA	$600	$295,100	0.2%
85	93650	Fresno	CA	$600	$306,000	0.2%
86	95207	Stockton	CA	$800	$409,000	0.2%
87	95311	Coulterville	CA	$600	$295,700	0.2%
88	95826	Sacramento	CA	$900	$441,300	0.2%
89	91710	Chino	CA	$1,200	$645,200	0.2%
90	93245	Lemoore	CA	$600	$324,100	0.2%
91	93612	Clovis	CA	$600	$311,700	0.2%
92	95333	Le Grand	CA	$600	$309,600	0.2%
93	95370	Sonora	CA	$800	$416,200	0.2%
94	95388	Winton	CA	$600	$307,900	0.2%
95	95926	Chico	CA	$900	$462,900	0.2%
96	95951	Hamilton City	CA	$600	$313,800	0.2%
97	95973	Chico	CA	$900	$484,600	0.2%
98	91732	El Monte	CA	$1,100	$628,400	0.2%
99	92342	Helendale	CA	$600	$339,700	0.2%
100	93225	Frazier Park	CA	$600	$334,100	0.2%

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: 2026-10-15.

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.