Social Vulnerability Index Recalculation
The Social Vulnerability Index Recalculation is based on the important work of the federal Centers for Disease Control. With the future of that index in doubt, the same federal datasets and methodologies were used to carry the index forward.
The most recent SVI uses the 2022 American Communities Survey as its base. This recalculation matches the 2022 baseline 100 percent. The 2022 methodologies form the basis of the updated calculations for subsequent ACS vintages. This platform will run updates on all new ACS releases.
Should the SVI be updated with changed methodologies, this platform will update to match, while preserving the 2022 methodologies for comparison purposes.
Fairfield County — Social Vulnerability Index
Unofficial CDC-method recomputation, 2020–2024 ACS 5-year
Fairfield County — Social Vulnerability Index by census tract
Where this is
Shading: Overall SVI Percentile
Lower (0 to 6)Lower-middle (7 to 18)Middle (18 to 33)Upper-middle (34 to 51)Higher (51 to 93)
Each unit is shaded by its Overall SVI Percentile value and grouped into equal-count bands (quantiles) against the other units shown — lighter = lower, darker = higher. It ranks position among the units in view; it does not grade places, and the ranges shift with which units are shown.
The map is bounded to this parent geography — it shows the selected unit among its own siblings only, the same depth rule the drill-down uses. Shading ranks position on the measure among the units shown; it does not grade places.
Click a tract to see its overall percentile and theme scores.
Median tract: 30th percentile (among all U.S. tracts).
These tracts span the 0th percentile to the 93rd percentile. The width of that range is the internal disparity.
Widest spread across these tracts: Housing Type & Transportation — this theme most separates the higher- and lower-ranked tracts here.
The SVI ranks each tract's position relative to a comparison set; it is not averaged into one number for the area, because percentiles do not average meaningfully. The distribution — median, range, and shape below — is the summary.
Well above the median — 1 tract (80th–100th percentile)
Tract 327.04 (pop. 4,071) — 93rd percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (well above).
Above the median — 3 tracts (60th–80th percentile)
Tract 315.00 (pop. 3,170) — 79th percentile — Above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Housing Type & Transportation (above); below the median on Racial & Ethnic Minority Status.
Tract 320.00 (pop. 3,533) — 77th percentile — Above the median
Driven by Socioeconomic Status (well above) and Housing Type & Transportation (above); near the median on Household Characteristics; below the median on Racial & Ethnic Minority Status.
Tract 313.00 (pop. 2,928) — 70th percentile — Above the median
Driven by Household Characteristics (above) and Housing Type & Transportation (well above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status.
Near the median — 8 tracts (40th–60th percentile)
Tract 331.02 (pop. 5,406) — 57th percentile — Near the median
Driven by Household Characteristics (above) and Housing Type & Transportation (above); near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status.
Tract 322.00 (pop. 2,878) — 55th percentile — Near the median
Driven by Socioeconomic Status (above) and Household Characteristics (above); below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 327.03 (pop. 4,544) — 52nd percentile — Near the median
Driven by Household Characteristics (above) and Racial & Ethnic Minority Status (well above); near the median on Socioeconomic Status; below the median on Housing Type & Transportation.
Tract 314.02 (pop. 4,709) — 51st percentile — Near the median
Driven by Household Characteristics (above); near the median on Socioeconomic Status and Housing Type & Transportation; below the median on Racial & Ethnic Minority Status.
Tract 317.00 (pop. 4,066) — 51st percentile — Near the median
Driven by Socioeconomic Status (well above); below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 325.01 (pop. 3,162) — 49th percentile — Near the median
Driven by Housing Type & Transportation (well above); near the median on Household Characteristics; below the median on Socioeconomic Status and Racial & Ethnic Minority Status.
Tract 316.00 (pop. 6,894) — 47th percentile — Near the median
Near the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation; below the median on Racial & Ethnic Minority Status.
Tract 303.00 (pop. 3,766) — 41st percentile — Near the median
Near the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation; below the median on Racial & Ethnic Minority Status.
Below the median — 8 tracts (20th–40th percentile)
Tract 323.00 (pop. 3,847) — 37th percentile — Below the median
Driven by Socioeconomic Status (above); near the median on Household Characteristics; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 331.01 (pop. 4,924) — 36th percentile — Below the median
Driven by Household Characteristics (above); near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status and Housing Type & Transportation.
Tract 326.01 (pop. 3,327) — 34th percentile — Below the median
Near the median on Socioeconomic Status and Household Characteristics; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 302.00 (pop. 2,901) — 33rd percentile — Below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 326.02 (pop. 3,518) — 32nd percentile — Below the median
Driven by Household Characteristics (well above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 309.01 (pop. 5,923) — 31st percentile — Below the median
Driven by Housing Type & Transportation (above); near the median on Household Characteristics; below the median on Socioeconomic Status and Racial & Ethnic Minority Status.
Tract 312.00 (pop. 5,049) — 29th percentile — Below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 311.00 (pop. 6,651) — 25th percentile — Below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Well below the median — 16 tracts (0th–20th percentile)
Tract 325.02 (pop. 3,192) — 19th percentile — Well below the median
Near the median on Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Socioeconomic Status and Household Characteristics.
Tract 310.00 (pop. 5,737) — 18th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 301.00 (pop. 3,862) — 18th percentile — Well below the median
Near the median on Socioeconomic Status; below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 328.00 (pop. 4,416) — 15th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 314.01 (pop. 2,427) — 13th percentile — Well below the median
Driven by Housing Type & Transportation (above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 327.01 (pop. 4,806) — 11th percentile — Well below the median
Driven by Racial & Ethnic Minority Status (above); below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 308.00 (pop. 6,345) — 10th percentile — Well below the median
Driven by Household Characteristics (above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 321.00 (pop. 3,020) — 9th percentile — Well below the median
Near the median on Socioeconomic Status; below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 307.00 (pop. 4,414) — 7th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 329.01 (pop. 6,913) — 6th percentile — Well below the median
Near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 309.02 (pop. 4,227) — 6th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 330.00 (pop. 5,973) — 6th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 306.01 (pop. 7,929) — 5th percentile — Well below the median
Near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 304.00 (pop. 4,629) — 2nd percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 329.02 (pop. 5,959) — 2nd percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 306.02 (pop. 4,337) — 0th percentile — Well below the median
Near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
SVI = the CDC/ATSDR Social Vulnerability Index, recomputed by this platform from American Community Survey 2020–2024 5-year estimates using CDC's published method. Percentiles rank each tract against all U.S. tracts. "Vulnerability" is the name of CDC's index; the platform reports where a place ranks on it, and does not grade places or their residents.
Top-decile flags follow CDC's own convention (≥ 90th percentile) and are attributed as such; they are not part of an official CDC distribution.