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.

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NationallyWithin its state

Brazoria County — Social Vulnerability Index

Unofficial CDC-method recomputation, 2020–2024 ACS 5-year
Brazoria County — Social Vulnerability Index by census tract
Tract 6601.00 — 9 (Lower)Tract 6602.00 — 29 (Lower-middle)Tract 6603.01 — 56 (Upper-middle)Tract 6603.02 — 3 (Lower)Tract 6603.03 — 14 (Lower-middle)Tract 6604.01 — 42 (Middle)Tract 6604.02 — 6 (Lower)Tract 6604.03 — 17 (Lower-middle)Tract 6605.01 — 22 (Lower-middle)Tract 6605.02 — 19 (Lower-middle)Tract 6605.03 — 16 (Lower-middle)Tract 6605.04 — 23 (Lower-middle)Tract 6606.03 — 37 (Middle)Tract 6606.04 — 3 (Lower)Tract 6606.05 — 12 (Lower)Tract 6606.06 — 27 (Lower-middle)Tract 6606.07 — 6 (Lower)Tract 6606.08 — 3 (Lower)Tract 6606.09 — 11 (Lower)Tract 6606.10 — 36 (Middle)Tract 6606.11 — 2 (Lower)Tract 6606.12 — 11 (Lower)Tract 6606.13 — 32 (Middle)Tract 6606.14 — 7 (Lower)Tract 6606.15 — 22 (Lower-middle)Tract 6606.16 — 31 (Lower-middle)Tract 6607.03 — 35 (Middle)Tract 6607.04 — 7 (Lower)Tract 6607.05 — 46 (Upper-middle)Tract 6607.06 — 10 (Lower)Tract 6607.07 — 30 (Lower-middle)Tract 6607.08 — 28 (Lower-middle)Tract 6608.03 — 56 (Upper-middle)Tract 6608.04 — 29 (Lower-middle)Tract 6608.05 — 20 (Lower-middle)Tract 6608.06 — 9 (Lower)Tract 6609.01 — 56 (Upper-middle)Tract 6609.02 — 43 (Middle)Tract 6610.00 — 63 (Higher)Tract 6611.00 — 74 (Higher)Tract 6612.00 — 74 (Higher)Tract 6613.00 — 74 (Higher)Tract 6614.00 — 79 (Higher)Tract 6615.01 — 45 (Upper-middle)Tract 6615.02 — 69 (Higher)Tract 6616.01 — 60 (Higher)Tract 6616.02 — 48 (Upper-middle)Tract 6617.00 — 44 (Middle)Tract 6618.00 — 35 (Middle)Tract 6619.01 — 49 (Upper-middle)Tract 6619.02 — 61 (Higher)Tract 6620.00 — 59 (Upper-middle)Tract 6621.00 — 55 (Upper-middle)Tract 6622.00 — 44 (Upper-middle)Tract 6623.00 — 62 (Higher)Tract 6624.00 — 61 (Higher)Tract 6625.00 — 27 (Lower-middle)Tract 6626.00 — 50 (Upper-middle)Tract 6627.00 — 37 (Middle)Tract 6628.00 — 43 (Middle)Tract 6629.00 — 55 (Upper-middle)Tract 6630.00 — 52 (Upper-middle)Tract 6631.00 — 33 (Middle)Tract 6632.00 — 36 (Middle)Tract 6633.00 — 40 (Middle)Tract 6634.00 — 73 (Higher)Tract 6635.00 — 45 (Upper-middle)Tract 6636.00 — 5 (Lower)Tract 6637.00 — 44 (Middle)Tract 6638.00 — 57 (Upper-middle)Tract 6639.00 — 86 (Higher)Tract 6640.00 — 79 (Higher)Tract 6641.00 — 44 (Middle)Tract 6642.00 — 61 (Higher)Tract 6643.00 — 95 (Higher)Tract 6644.00 — 61 (Higher)Tract 6645.01 — 43 (Middle)
Where this is
Shading: Overall SVI Percentile
Lower (2 to 12)Lower-middle (14 to 31)Middle (32 to 44)Upper-middle (44 to 59)Higher (60 to 95)
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: 40th percentile (among tracts in TX).
These tracts span the 2nd percentile to the 95th percentile. The width of that range is the internal disparity.
Well above the median2 (3%) · 7,684 people
Above the median14 (18%) · 85,072 people
Near the median22 (29%) · 110,251 people
Below the median20 (26%) · 102,048 people
Well below the median19 (25%) · 86,200 people
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 — 2 tracts (80th–100th percentile)
Tract 6643.00 (pop. 5,473) — 95th 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).
Tract 6639.00 (pop. 2,211) — 86th percentile — Well above the median
Driven by Household Characteristics (above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (well above); near the median on Socioeconomic Status.
Above the median — 14 tracts (60th–80th percentile)
Tract 6640.00 (pop. 3,574) — 79th percentile — Above the median
Driven by Household Characteristics (above) and Housing Type & Transportation (well above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status.
Tract 6614.00 (pop. 6,951) — 79th percentile — Above the median
Driven by Socioeconomic Status (above), Household Characteristics (above) and Housing Type & Transportation (well above); below the median on Racial & Ethnic Minority Status.
Tract 6613.00 (pop. 3,050) — 74th percentile — Above the median
Driven by Socioeconomic Status (above) and Household Characteristics (well above); near the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6612.00 (pop. 4,602) — 74th percentile — Above the median
Driven by Socioeconomic Status (above), Household Characteristics (above) and Housing Type & Transportation (well above); near the median on Racial & Ethnic Minority Status.
Tract 6611.00 (pop. 2,906) — 74th 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.
Tract 6634.00 (pop. 8,762) — 73rd percentile — Above the median
Driven by Socioeconomic Status (above) and Housing Type & Transportation (well above); near the median on Household Characteristics and Racial & Ethnic Minority Status.
Tract 6615.02 (pop. 5,099) — 69th percentile — Above the median
Driven by Socioeconomic Status (above) and Housing Type & Transportation (well above); near the median on Household Characteristics; below the median on Racial & Ethnic Minority Status.
Tract 6610.00 (pop. 10,648) — 63rd percentile — Above the median
Driven by Household Characteristics (well above) and Housing Type & Transportation (above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status.
Tract 6623.00 (pop. 5,188) — 62nd percentile — Above the median
Driven by Household Characteristics (well above) and Housing Type & Transportation (above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status.
Tract 6644.00 (pop. 5,059) — 61st percentile — Above the median
Driven by Socioeconomic Status (above), Household Characteristics (above) and Racial & Ethnic Minority Status (above); below the median on Housing Type & Transportation.
Tract 6642.00 (pop. 2,251) — 61st percentile — Above the median
Driven by Housing Type & Transportation (above); near the median on Socioeconomic Status and Household Characteristics; below the median on Racial & Ethnic Minority Status.
Tract 6624.00 (pop. 5,774) — 61st percentile — Above the median
Driven by Household Characteristics (above) and Housing Type & Transportation (above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status.
Tract 6619.02 (pop. 13,694) — 61st percentile — Above the median
Driven by Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above); near the median on Socioeconomic Status and Household Characteristics.
Tract 6616.01 (pop. 7,514) — 60th percentile — Above the median
Driven by Household Characteristics (above) and Housing Type & Transportation (above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status.
Near the median — 22 tracts (40th–60th percentile)
Tract 6620.00 (pop. 5,943) — 59th percentile — Near the median
Driven by Household Characteristics (above) and Housing Type & Transportation (above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status.
Tract 6638.00 (pop. 6,013) — 57th percentile — Near the median
Driven by Socioeconomic Status (above) and Housing Type & Transportation (above); near the median on Racial & Ethnic Minority Status; below the median on Household Characteristics.
Tract 6609.01 (pop. 1,760) — 56th percentile — Near the median
Driven by Household Characteristics (above) and Racial & Ethnic Minority Status (above); near the median on Socioeconomic Status; below the median on Housing Type & Transportation.
Tract 6603.01 (pop. 4,106) — 56th percentile — Near the median
Driven by Housing Type & Transportation (well above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status; below the median on Household Characteristics.
Tract 6608.03 (pop. 3,338) — 56th percentile — Near the median
Driven by Housing Type & Transportation (well above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status; below the median on Household Characteristics.
Tract 6629.00 (pop. 4,922) — 55th 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 6621.00 (pop. 6,896) — 55th percentile — Near the median
Driven by Household Characteristics (well above) and Housing Type & Transportation (well above); below the median on Socioeconomic Status and Racial & Ethnic Minority Status.
Tract 6630.00 (pop. 5,407) — 52nd percentile — Near the median
Driven by Housing Type & Transportation (well above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 6626.00 (pop. 3,321) — 50th percentile — Near the median
Driven by Household Characteristics (well above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6619.01 (pop. 9,374) — 49th percentile — Near the median
Driven by Socioeconomic Status (above) and Housing Type & Transportation (above); near the median on Racial & Ethnic Minority Status; below the median on Household Characteristics.
Tract 6616.02 (pop. 2,804) — 48th percentile — Near the median
Driven by Housing Type & Transportation (well above); near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status and Household Characteristics.
Tract 6607.05 (pop. 5,448) — 46th percentile — Near the median
Near the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Household Characteristics.
Tract 6635.00 (pop. 5,016) — 45th percentile — Near the median
Near the median on Socioeconomic Status and Housing Type & Transportation; below the median on Household Characteristics and Racial & Ethnic Minority Status.
Tract 6615.01 (pop. 4,240) — 45th percentile — Near the median
Near the median on Socioeconomic Status and Housing Type & Transportation; below the median on Household Characteristics and Racial & Ethnic Minority Status.
Tract 6622.00 (pop. 8,865) — 44th 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 6637.00 (pop. 4,157) — 44th percentile — Near the median
Driven by Household Characteristics (above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status; below the median on Housing Type & Transportation.
Tract 6617.00 (pop. 3,099) — 44th percentile — Near 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 6641.00 (pop. 5,196) — 44th percentile — Near the median
Driven by Household Characteristics (above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6645.01 (pop. 4,506) — 43rd percentile — Near the median
Driven by Household Characteristics (above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6628.00 (pop. 6,549) — 43rd 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 6609.02 (pop. 6,114) — 43rd percentile — Near the median
Driven by Household Characteristics (well above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status; below the median on Housing Type & Transportation.
Tract 6604.01 (pop. 3,177) — 42nd percentile — Near the median
Driven by Household Characteristics (well above); near the median on Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Socioeconomic Status.
Below the median — 20 tracts (20th–40th percentile)
Tract 6633.00 (pop. 2,213) — 40th percentile — Below the median
Driven by Socioeconomic Status (above) and Household Characteristics (above); near the median on Racial & Ethnic Minority Status; below the median on Housing Type & Transportation.
Tract 6606.03 (pop. 3,216) — 37th percentile — Below the median
Driven by Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above); below the median on Socioeconomic Status and Household Characteristics.
Tract 6627.00 (pop. 2,621) — 37th percentile — Below the median
Driven by Household Characteristics (above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6632.00 (pop. 4,938) — 36th 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 6606.10 (pop. 4,935) — 36th percentile — Below the median
Driven by Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above); below the median on Socioeconomic Status and Household Characteristics.
Tract 6618.00 (pop. 12,512) — 35th percentile — Below the median
Near the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Socioeconomic Status.
Tract 6607.03 (pop. 4,566) — 35th percentile — Below the median
Driven by Housing Type & Transportation (above); near the median on Household Characteristics and Racial & Ethnic Minority Status; below the median on Socioeconomic Status.
Tract 6631.00 (pop. 7,094) — 33rd percentile — Below the median
Driven by Housing Type & Transportation (well above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 6606.13 (pop. 6,632) — 32nd percentile — Below the median
Driven by Racial & Ethnic Minority Status (above); near the median on Household Characteristics and Housing Type & Transportation; below the median on Socioeconomic Status.
Tract 6606.16 (pop. 6,697) — 31st percentile — Below the median
Driven by Racial & Ethnic Minority Status (above); below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 6607.07 (pop. 4,623) — 30th percentile — Below the median
Near the median on Socioeconomic Status and Racial & Ethnic Minority Status; below the median on Household Characteristics and Housing Type & Transportation.
Tract 6608.04 (pop. 3,979) — 29th 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 6602.00 (pop. 5,636) — 29th percentile — Below the median
Driven by Housing Type & Transportation (above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 6607.08 (pop. 10,202) — 28th percentile — Below the median
Near the median on Household Characteristics and Racial & Ethnic Minority Status; below the median on Socioeconomic Status and Housing Type & Transportation.
Tract 6625.00 (pop. 3,452) — 27th percentile — Below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6606.06 (pop. 3,338) — 27th percentile — Below the median
Near the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Socioeconomic Status.
Tract 6605.04 (pop. 1,565) — 23rd percentile — Below the median
Near the median on Socioeconomic Status and Racial & Ethnic Minority Status; below the median on Household Characteristics and Housing Type & Transportation.
Tract 6605.01 (pop. 2,277) — 22nd percentile — Below the median
Driven by Household Characteristics (above) and Racial & Ethnic Minority Status (above); below the median on Socioeconomic Status and Housing Type & Transportation.
Tract 6606.15 (pop. 6,737) — 22nd percentile — Below the median
Driven by Racial & Ethnic Minority Status (above); below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 6608.05 (pop. 4,815) — 20th percentile — Below the median
Near the median on Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Socioeconomic Status and Household Characteristics.
Well below the median — 19 tracts (0th–20th percentile)
Tract 6605.02 (pop. 4,862) — 19th 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 6604.03 (pop. 4,947) — 17th 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 6605.03 (pop. 3,198) — 16th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6603.03 (pop. 3,901) — 14th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6606.05 (pop. 7,119) — 12th percentile — Well below the median
Driven by Household Characteristics (above) and Racial & Ethnic Minority Status (above); below the median on Socioeconomic Status and Housing Type & Transportation.
Tract 6606.09 (pop. 4,805) — 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 6606.12 (pop. 3,795) — 11th 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 6607.06 (pop. 4,532) — 10th 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 6601.00 (pop. 4,445) — 9th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6608.06 (pop. 3,041) — 9th 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 6607.04 (pop. 5,292) — 7th 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 6606.14 (pop. 5,443) — 7th 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 6604.02 (pop. 5,027) — 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 6606.07 (pop. 4,252) — 6th percentile — Well below the median
Driven by Racial & Ethnic Minority Status (well above); below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 6636.00 (pop. 5,284) — 5th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6603.02 (pop. 3,557) — 3rd percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6606.08 (pop. 2,587) — 3rd percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6606.04 (pop. 3,756) — 3rd 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 6606.11 (pop. 6,357) — 2nd 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.
1 tract unranked — no population or suppressed
These carry no percentile (zero-population or suppressed data, typically water and special-use tracts). They are excluded from the bands, median and range above, and are never shown as a low score.
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 tracts in TX. "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.

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