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2026 Rankings

San Francisco Bay Area Home Safety Rankings - 493 ZIPs

Explore rankings under Home Safety Score model 4.0.0. Only ZIPs with all four required inputs are ranked; missing evidence is not imputed or reweighted.

San Francisco Bay Area (California) includes 493 tracked ZIP codes and 142 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.

Average Home Safety Grade: A (90/100)

Grade ZIP Codes %
A 35 66%
B 11 21%
C 6 11%
D 1 2%
F 0 0%

Top 10 ZIP Codes by Home Safety Score

Rank ZIP City Score Grade
1 94556 Moraga 100 A
2 94571 Rio Vista 100 A
3 94589 Vallejo 100 A
4 94590 Vallejo 100 A
5 94901 San Rafael 100 A
6 94903 San Rafael 100 A
7 94904 Greenbrae 100 A
8 94920 Belvedere Tiburon 100 A
9 94924 Bolinas 100 A
10 94925 Corte Madera 100 A

10 Riskiest ZIP Codes

Rank ZIP City Score Grade Risk Factor
1 95033 Los Gatos 53 D 23 violations
2 95023 Hollister 60 C 8 violations
3 95076 Watsonville 64 C 4 violations
4 95066 Scotts Valley 67 C 14 violations
5 95019 Freedom 67 C —
6 95060 Santa Cruz 68 C 18 violations
7 95006 Boulder Creek 68 C 18 violations
8 95018 Felton 71 B 8 violations
9 95007 Brookdale 75 B 5 violations
10 95005 Ben Lomond 75 B 5 violations

Most Common Contaminant Violations

Contaminant Violations ZIPs Affected
Stage 2 DBP Rule 89 27
Haloacetic Acids (HAA5) 51 15
Lead 49 5
Consumer Confidence Report Rule 48 25
E. coli 34 34
Total Trihalomethanes (TTHM) 29 9
Barium 8 8
Stage 1 DBP Rule 6 5

Lead Risk

  • Average of reported 90th-percentile lead results: 0.0055 mg/L (below EPA action level)
  • 2 of 281 ZIP codes with known status exceed EPA lead action level
  • 21% of housing built before 1950
  • 48% of housing built before 1970

Cities in This Metro

...and 132 more cities

All 493 ZIP Codes Ranked

View complete ranking
Rank ZIP City Score Grade Violations
1 94556 Moraga 100 A 0
2 94571 Rio Vista 100 A 0
3 94589 Vallejo 100 A 0
4 94590 Vallejo 100 A 0
5 94901 San Rafael 100 A 0
6 94903 San Rafael 100 A 0
7 94904 Greenbrae 100 A 0
8 94920 Belvedere Tiburon 100 A 0
9 94924 Bolinas 100 A 1
10 94925 Corte Madera 100 A 0
11 94930 Fairfax 100 A 0
12 94933 Forest Knolls 100 A 0
13 94937 Inverness 100 A 0
14 94938 Lagunitas 100 A 0
15 94939 Larkspur 100 A 0
16 94941 Mill Valley 100 A 0
17 94945 Novato 100 A 0
18 94946 Nicasio 100 A 0
19 94947 Novato 100 A 0
20 94949 Novato 100 A 0
21 94957 Ross 100 A 0
22 94960 San Anselmo 100 A 0
23 94963 San Geronimo 100 A 0
24 94964 San Quentin 100 A 0
25 94965 Sausalito 100 A 0
26 94973 Woodacre 100 A 0
27 94931 Cotati 99 A 2
28 94952 Petaluma 99 A 2
29 94954 Petaluma 99 A 2
30 94510 Benicia 96 A 2
31 94535 Travis Afb 96 A 2
32 94591 Vallejo 96 A 2
33 94534 Fairfield 95 A 3
34 94533 Fairfield 85 A 14
35 94585 Suisun City 85 A 14
36 95003 Aptos 83 B 1
37 95010 Capitola 83 B 0
38 95012 Castroville 83 B 2
39 95039 Moss Landing 83 B 0
40 95062 Santa Cruz 83 B 0
41 95064 Santa Cruz 83 B 0
42 94928 Rohnert Park 81 B 4
43 95073 Soquel 77 B 10
44 95005 Ben Lomond 75 B 5
45 95007 Brookdale 75 B 5
46 95018 Felton 71 B 8
47 95006 Boulder Creek 68 C 18
48 95060 Santa Cruz 68 C 18
49 95019 Freedom 67 C 0
50 95066 Scotts Valley 67 C 14
51 95076 Watsonville 64 C 4
52 95023 Hollister 60 C 8
53 95033 Los Gatos 53 D 23
54 94002 Belmont — — 0
55 94005 Brisbane — — 0
56 94010 Burlingame — — 0
57 94014 Daly City — — 0
58 94015 Daly City — — 0
59 94018 El Granada — — 0
60 94019 Half Moon Bay — — 0
61 94020 La Honda — — 0
62 94021 Loma Mar — — 0
63 94022 Los Altos — — 0
64 94024 Los Altos — — 0
65 94025 Menlo Park — — 0
66 94027 Atherton — — 0
67 94028 Portola Valley — — 0
68 94030 Millbrae — — 0
69 94037 Montara — — 0
70 94038 Moss Beach — — 0
71 94040 Mountain View — — 0
72 94041 Mountain View — — 0
73 94043 Mountain View — — 0
74 94044 Pacifica — — 0
75 94060 Pescadero — — 0
76 94061 Redwood City — — 0
77 94062 Redwood City — — 0
78 94063 Redwood City — — 0
79 94065 Redwood City — — 0
80 94066 San Bruno — — 0
81 94070 San Carlos — — 0
82 94074 San Gregorio — — 0
83 94080 South San Francisco — — 0
84 94085 Sunnyvale — — 0
85 94086 Sunnyvale — — 0
86 94087 Sunnyvale — — 0
87 94089 Sunnyvale — — 0
88 94102 San Francisco — — 0
89 94103 San Francisco — — 0
90 94104 San Francisco — — 0
91 94105 San Francisco — — 0
92 94107 San Francisco — — 0
93 94108 San Francisco — — 0
94 94109 San Francisco — — 0
95 94110 San Francisco — — 0
96 94111 San Francisco — — 0
97 94112 San Francisco — — 0
98 94114 San Francisco — — 0
99 94115 San Francisco — — 0
100 94116 San Francisco — — 0
101 94117 San Francisco — — 0
102 94118 San Francisco — — 0
103 94121 San Francisco — — 0
104 94122 San Francisco — — 0
105 94123 San Francisco — — 0
106 94124 San Francisco — — 0
107 94127 San Francisco — — 0
108 94129 San Francisco — — 0
109 94130 San Francisco — — 0
110 94131 San Francisco — — 0
111 94132 San Francisco — — 0
112 94133 San Francisco — — 0
113 94134 San Francisco — — 0
114 94158 San Francisco — — 0
115 94301 Palo Alto — — 0
116 94303 Palo Alto — — 0
117 94304 Palo Alto — — 0
118 94305 Stanford — — 0
119 94306 Palo Alto — — 0
120 94401 San Mateo — — 0
121 94402 San Mateo — — 0
122 94403 San Mateo — — 0
123 94404 San Mateo — — 1
124 94501 Alameda — — 0
125 94502 Alameda — — 0
126 94503 American Canyon — — 2
127 94505 Discovery Bay — — 0
128 94506 Danville — — 0
129 94507 Alamo — — 0
130 94508 Angwin — — 2
131 94509 Antioch — — 0
132 94511 Bethel Island — — 0
133 94512 Birds Landing — — 0
134 94513 Brentwood — — 0
135 94514 Byron — — 0
136 94515 Calistoga — — 6
137 94516 Canyon — — 0
138 94517 Clayton — — 0
139 94518 Concord — — 0
140 94519 Concord — — 0
141 94520 Concord — — 0
142 94521 Concord — — 0
143 94523 Pleasant Hill — — 0
144 94525 Crockett — — 0
145 94526 Danville — — 0
146 94528 Diablo — — 0
147 94530 El Cerrito — — 0
148 94531 Antioch — — 0
149 94536 Fremont — — 0
150 94538 Fremont — — 0
151 94539 Fremont — — 0
152 94541 Hayward — — 0
153 94542 Hayward — — 0
154 94544 Hayward — — 0
155 94545 Hayward — — 0
156 94546 Castro Valley — — 0
157 94547 Hercules — — 0
158 94548 Knightsen — — 0
159 94549 Lafayette — — 0
160 94550 Livermore — — 0
161 94551 Livermore — — 0
162 94552 Castro Valley — — 2
163 94553 Martinez — — 0
164 94555 Fremont — — 0
165 94558 Napa — — 2
166 94559 Napa — — 0
167 94560 Newark — — 0
168 94561 Oakley — — 0
169 94563 Orinda — — 0
170 94564 Pinole — — 0
171 94565 Pittsburg — — 0
172 94566 Pleasanton — — 0
173 94567 Pope Valley — — 2
174 94568 Dublin — — 0
175 94569 Port Costa — — 0
176 94572 Rodeo — — 0
177 94573 Rutherford — — —
178 94574 Saint Helena — — 9
179 94575 Moraga — — 0
180 94576 Deer Park — — 2
181 94577 San Leandro — — 0
182 94578 San Leandro — — 0
183 94579 San Leandro — — 0
184 94580 San Lorenzo — — 0
185 94582 San Ramon — — 0
186 94583 San Ramon — — 0
187 94586 Sunol — — 0
188 94587 Union City — — 0
189 94588 Pleasanton — — 0
190 94592 Vallejo — — 0
191 94595 Walnut Creek — — 0
192 94596 Walnut Creek — — 0
193 94597 Walnut Creek — — 0
194 94598 Walnut Creek — — 0
195 94599 Yountville — — 3
196 94601 Oakland — — 0
197 94602 Oakland — — 0
198 94603 Oakland — — 0
199 94605 Oakland — — 0
200 94606 Oakland — — 0
201 94607 Oakland — — 0
202 94608 Emeryville — — 0
203 94609 Oakland — — 0
204 94610 Oakland — — 0
205 94611 Oakland — — 0
206 94612 Oakland — — 0
207 94613 Oakland — — 0
208 94618 Oakland — — 0
209 94619 Oakland — — 0
210 94621 Oakland — — 0
211 94702 Berkeley — — 0
212 94703 Berkeley — — 0
213 94704 Berkeley — — 0
214 94705 Berkeley — — 0
215 94706 Albany — — 0
216 94707 Berkeley — — 0
217 94708 Berkeley — — 0
218 94709 Berkeley — — 0
219 94710 Berkeley — — 0
220 94720 Berkeley — — 0
221 94801 Richmond — — 0
222 94803 El Sobrante — — 0
223 94804 Richmond — — 0
224 94805 Richmond — — 0
225 94806 San Pablo — — 0
226 94922 Bodega — — —
227 94923 Bodega Bay — — 0
228 94929 Dillon Beach — — —
229 94940 Marshall — — 0
230 94951 Penngrove — — 2
231 94956 Point Reyes Station — — 0
232 94970 Stinson Beach — — 1
233 94971 Tomales — — 0
234 94972 Valley Ford — — 0
235 95002 Alviso — — 0
236 95004 Aromas — — 5
237 95008 Campbell — — 1
238 95014 Cupertino — — 1
239 95017 Davenport — — 12
240 95020 Gilroy — — 23
241 95030 Los Gatos — — 3
242 95032 Los Gatos — — 3
243 95035 Milpitas — — 3
244 95037 Morgan Hill — — 23
245 95041 Mount Hermon — — 8
246 95043 Paicines — — —
247 95045 San Juan Bautista — — 5
248 95046 San Martin — — 0
249 95050 Santa Clara — — 1
250 95051 Santa Clara — — 0
251 95053 Santa Clara — — 1
252 95054 Santa Clara — — 0
253 95065 Santa Cruz — — 0
254 95070 Saratoga — — 3
255 95075 Tres Pinos — — —
256 95110 San Jose — — 1
257 95111 San Jose — — 1
258 95112 San Jose — — 3
259 95113 San Jose — — 1
260 95116 San Jose — — 1
261 95117 San Jose — — 1
262 95118 San Jose — — 1
263 95119 San Jose — — 1
264 95120 San Jose — — 1
265 95121 San Jose — — 1
266 95122 San Jose — — 1
267 95123 San Jose — — 1
268 95124 San Jose — — 3
269 95125 San Jose — — 1
270 95126 San Jose — — 1
271 95127 San Jose — — 3
272 95128 San Jose — — 1
273 95129 San Jose — — 1
274 95130 San Jose — — 1
275 95131 San Jose — — 3
276 95132 San Jose — — 1
277 95133 San Jose — — 1
278 95134 San Jose — — 3
279 95135 San Jose — — 0
280 95136 San Jose — — 1
281 95138 San Jose — — 0
282 95139 San Jose — — 0
283 95148 San Jose — — 1

Data Sources

  • Water quality: EPA SDWIS
  • Housing: U.S. Census Bureau American Community Survey
  • Flood: FEMA NFIP
  • Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.

Reporting periods vary by source; the page metadata identifies this materialization.

Methodology
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →
Disclaimer: Scores are based on EPA SDWIS reported data and are not a guarantee of current water safety. Water quality can change. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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How to cite this page

APA ZipCheckup. (2026). San Francisco Bay Area Home Safety Rankings - 493 ZIPs. https://zipcheckup.com/rankings/metro/san-francisco-bay-area/
BibTeX 
@misc{zipcheckup-rankings-metro-san-francisco-bay-area,
  author = {{ZipCheckup}},
  title  = {{San Francisco Bay Area Home Safety Rankings - 493 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/san-francisco-bay-area/}
}

Page version: October 2026.

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