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.
Merrimack County — Social Vulnerability Index
Unofficial CDC-method recomputation, 2020–2024 ACS 5-year
Merrimack County — Social Vulnerability Index by census tract
Where this is
Shading: Overall SVI Percentile
Lower (3 to 12)Lower-middle (13 to 19)Middle (20 to 32)Upper-middle (34 to 54)Higher (56 to 81)
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: 28th percentile (among all U.S. tracts).
These tracts span the 3rd percentile to the 81st 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 329.00 (pop. 4,378) — 81st percentile — Well above the median
Driven by Household Characteristics (well above) and Housing Type & Transportation (well above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status.
Above the median — 3 tracts (60th–80th percentile)
Tract 31.00 (pop. 4,743) — 67th percentile — Above the median
Driven by Housing Type & Transportation (well above); near the median on Socioeconomic Status and Household Characteristics; below the median on Racial & Ethnic Minority Status.
Tract 443.00 (pop. 5,087) — 62nd 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 322.00 (pop. 2,907) — 61st 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.
Near the median — 9 tracts (40th–60th percentile)
Tract 380.00 (pop. 4,044) — 60th percentile — Near the median
Driven by Socioeconomic Status (above) and Housing Type & Transportation (well above); below the median on Household Characteristics and Racial & Ethnic Minority Status.
Tract 441.00 (pop. 3,710) — 58th 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 350.00 (pop. 4,105) — 57th 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 324.00 (pop. 3,809) — 56th percentile — Near the median
Driven by Housing Type & Transportation (well above); near the median on Socioeconomic Status; below the median on Household Characteristics and Racial & Ethnic Minority Status.
Tract 326.00 (pop. 3,914) — 54th percentile — Near the median
Driven by Housing Type & Transportation (above); near the median on Socioeconomic Status; below the median on Household Characteristics and Racial & Ethnic Minority Status.
Tract 323.00 (pop. 1,909) — 51st percentile — Near the median
Driven by Housing Type & Transportation (well above); near the median on Socioeconomic Status; below the median on Household Characteristics and Racial & Ethnic Minority Status.
Tract 325.00 (pop. 3,988) — 47th 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 440.00 (pop. 4,971) — 43rd 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 430.02 (pop. 4,461) — 41st 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.
Below the median — 10 tracts (20th–40th percentile)
Tract 385.00 (pop. 5,186) — 38th percentile — Below the median
Driven by Housing Type & Transportation (above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 32.01 (pop. 5,255) — 35th 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 327.01 (pop. 1,514) — 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 340.00 (pop. 4,939) — 32nd 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 415.00 (pop. 3,846) — 30th percentile — Below the median
Near the median on Socioeconomic Status; below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 425.00 (pop. 3,744) — 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 430.01 (pop. 4,338) — 28th percentile — Below the median
Near the median on Housing Type & Transportation; below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 30.06 (pop. 3,717) — 26th percentile — Below the median
Driven by Housing Type & Transportation (above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 30.01 (pop. 4,619) — 24th 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 327.06 (pop. 3,820) — 22nd percentile — Below the median
Driven by Household Characteristics (above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Well below the median — 16 tracts (0th–20th percentile)
Tract 400.00 (pop. 6,197) — 20th 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 321.00 (pop. 3,796) — 19th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 360.00 (pop. 5,692) — 18th percentile — Well below the median
Near the median on Housing Type & Transportation; below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 442.00 (pop. 6,721) — 17th percentile — Well below the median
Near the median on Housing Type & Transportation; below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 330.00 (pop. 2,745) — 15th percentile — Well below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 405.01 (pop. 1,565) — 14th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 410.02 (pop. 2,460) — 14th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 410.01 (pop. 1,973) — 14th percentile — Well below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 300.00 (pop. 3,097) — 13th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 310.01 (pop. 4,342) — 12th percentile — Well below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 370.00 (pop. 2,353) — 10th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 328.00 (pop. 5,543) — 8th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 32.02 (pop. 2,183) — 7th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 405.02 (pop. 4,266) — 7th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 390.00 (pop. 6,037) — 4th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 310.02 (pop. 3,993) — 3rd percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status 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.