{ "title": "Foundation soil risk by city", "publisher": "FoundationRepairHQ", "url": "https://www.foundationrepairhq.com/data/foundation-soil-risk", "license": { "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/" }, "citation": "FoundationRepairHQ, \"Foundation soil risk by city\", 2026, https://www.foundationrepairhq.com/data/foundation-soil-risk", "date_modified": "2026-11-02", "soil_queried": "2026-10-30", "climate_retrieved": "2026-11-02", "housing_compiled": "2026-03-21", "sources": [ { "name": "USDA NRCS Soil Survey Geographic Database (SSURGO), via Soil Data Access", "url": "https://sdmdataaccess.sc.egov.usda.gov/", "covers": "soil series, linear extensibility, clay, drainage" }, { "name": "NOAA NCEI U.S. Climate Normals 1991–2020 (annual/seasonal), one station per city", "url": "https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/", "covers": "annual precipitation and frost days (minimum ≤ 32°F)" }, { "name": "US Census Bureau, American Community Survey 5-year estimates 2022 (B25035)", "url": "https://data.census.gov/table/ACSDT5Y2022.B25035", "covers": "median year built" } ], "limitations": [ "The 50 cities are the ones this site covers, half of them in Texas. They are not a random or representative sample of US cities, so counts describe this table, not the country.", "One coordinate per city: the box around the city center does not cover the whole metro, and suburbs can sit on different soils.", "Counts by mapped components are not area-weighted. A series can rank first because it appears in many small map units.", "Soil survey values are representative values for a series, not measurements at an address. Soils change block by block; only a geotechnical report or an engineer reads your lot.", "Shrink-swell is one factor. Drainage, trees, plumbing leaks, fill and construction quality decide whether a given house moves." ], "columns": [ { "key": "city", "name": "City", "description": "City name" }, { "key": "state_abbr", "name": "State", "description": "Two-letter US state code" }, { "key": "latitude", "name": "Latitude", "description": "Latitude of the city center used for the soil query (WGS84)" }, { "key": "longitude", "name": "Longitude", "description": "Longitude of the city center used for the soil query (WGS84)" }, { "key": "dominant_series", "name": "Dominant soil series", "description": "Most frequently mapped major soil series within about 10 miles of the city center (USDA NRCS SSURGO)" }, { "key": "dominant_share_pct", "name": "Dominant series share", "description": "Share of mapped major-component percentages held by the dominant series (not area-weighted)", "unit": "percent" }, { "key": "shrink_swell_class", "name": "Shrink-swell class", "description": "Highest NRCS linear-extensibility class among the four most-mapped series: Low <3%, Moderate 3–6%, High 6–9%, Very High ≥9%" }, { "key": "max_lep_pct", "name": "Max LEP", "description": "Highest representative linear extensibility (lep_r) in any horizon of the four most-mapped series", "unit": "percent" }, { "key": "max_lep_series", "name": "Max LEP series", "description": "Soil series with the highest linear extensibility" }, { "key": "high_series", "name": "High-class series", "description": "Number of the most-mapped series in the high or very high shrink-swell class" }, { "key": "series_counted", "name": "Series counted", "description": "Number of most-mapped major soil series examined (up to four)" }, { "key": "max_clay_pct", "name": "Max clay", "description": "Highest representative total clay (claytotal_r) in any horizon of the most-mapped series", "unit": "percent" }, { "key": "dominant_drainage", "name": "Drainage (dominant series)", "description": "NRCS drainage class most often reported for the dominant series" }, { "key": "frost_days", "name": "Frost days (min ≤ 32°F)", "description": "Average number of days a year with a minimum temperature at or below 32°F (NOAA NCEI 1991–2020 Climate Normals, ANN-TMIN-AVGNDS-LSTH032). A count of freezing nights, not of freeze-thaw cycles", "unit": "days per year" }, { "key": "annual_precip_in", "name": "Annual precipitation", "description": "Normal annual precipitation (NOAA NCEI 1991–2020 Climate Normals, ANN-PRCP-NORMAL)", "unit": "inches" }, { "key": "noaa_station_id", "name": "NOAA station", "description": "GHCN-Daily id of the normals station used for the two climate columns (nearest first-order station to the city center with complete normals)" }, { "key": "noaa_station_name", "name": "NOAA station name", "description": "Station name as published by NOAA NCEI" }, { "key": "median_year_built", "name": "Median year built", "description": "Median year structure built, all housing units (US Census Bureau ACS 5-year 2022, table B25035)" }, { "key": "url", "name": "City page", "description": "URL of the FoundationRepairHQ city page with the full soil table" } ], "rows": [ { "slug": "new-orleans-la", "city": "New Orleans", "state": "Louisiana", "state_abbr": "LA", "latitude": 29.9511, "longitude": -90.0715, "dominant_series": "Cancienne", "dominant_share_pct": 19, "shrink_swell_class": "Very High", "max_lep_pct": 20.2, "max_lep_series": "Allemands", "high_series": 3, "series_counted": 4, "max_clay_pct": 94, "dominant_drainage": "Somewhat poorly drained", "frost_days": 5, "annual_precip_in": 63.4, "noaa_station_id": "USW00012916", "noaa_station_name": "NEW ORLEANS INTL AP, LA US", "median_year_built": 1958, "url": "https://www.foundationrepairhq.com/city/new-orleans-la" }, { "slug": "baton-rouge-la", "city": "Baton Rouge", "state": "Louisiana", "state_abbr": "LA", "latitude": 30.4515, "longitude": -91.1871, "dominant_series": "Sharkey", "dominant_share_pct": 15, "shrink_swell_class": "Very High", "max_lep_pct": 19.8, "max_lep_series": "Sharkey", "high_series": 3, "series_counted": 4, "max_clay_pct": 84, "dominant_drainage": "Poorly drained", "frost_days": 18, "annual_precip_in": 61.9, "noaa_station_id": "USW00013970", "noaa_station_name": "BATON ROUGE RYAN AP, LA US", "median_year_built": 1975, "url": "https://www.foundationrepairhq.com/city/baton-rouge-la" }, { "slug": "corpus-christi-tx", "city": "Corpus Christi", "state": "Texas", "state_abbr": "TX", "latitude": 27.8006, "longitude": -97.3964, "dominant_series": "Victoria", "dominant_share_pct": 11, "shrink_swell_class": "Very High", "max_lep_pct": 18.7, "max_lep_series": "Victoria", "high_series": 3, "series_counted": 4, "max_clay_pct": 61, "dominant_drainage": "Well drained", "frost_days": 4, "annual_precip_in": 31.7, "noaa_station_id": "USW00012924", "noaa_station_name": "CORPUS CHRISTI, TX US", "median_year_built": 1980, "url": "https://www.foundationrepairhq.com/city/corpus-christi-tx" }, { "slug": "austin-tx", "city": "Austin", "state": "Texas", "state_abbr": "TX", "latitude": 30.2672, "longitude": -97.7431, "dominant_series": "Eckrant", "dominant_share_pct": 6, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Heiden", "high_series": 2, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Well drained", "frost_days": 12, "annual_precip_in": 36.3, "noaa_station_id": "USW00013958", "noaa_station_name": "AUSTIN-CAMP MABRY, TX US", "median_year_built": 1991, "url": "https://www.foundationrepairhq.com/city/austin-tx" }, { "slug": "frisco-tx", "city": "Frisco", "state": "Texas", "state_abbr": "TX", "latitude": 33.1507, "longitude": -96.8236, "dominant_series": "Altoga", "dominant_share_pct": 6, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Heiden", "high_series": 4, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Well drained", "frost_days": 23, "annual_precip_in": 38.3, "noaa_station_id": "USW00013960", "noaa_station_name": "DALLAS LOVE FLD, TX US", "median_year_built": 2008, "url": "https://www.foundationrepairhq.com/city/frisco-tx" }, { "slug": "georgetown-tx", "city": "Georgetown", "state": "Texas", "state_abbr": "TX", "latitude": 30.6333, "longitude": -97.6781, "dominant_series": "Houston Black", "dominant_share_pct": 9, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Heiden", "high_series": 3, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Moderately well drained", "frost_days": 12, "annual_precip_in": 36.3, "noaa_station_id": "USW00013958", "noaa_station_name": "AUSTIN-CAMP MABRY, TX US", "median_year_built": 2005, "url": "https://www.foundationrepairhq.com/city/georgetown-tx" }, { "slug": "jackson-ms", "city": "Jackson", "state": "Mississippi", "state_abbr": "MS", "latitude": 32.2988, "longitude": -90.1848, "dominant_series": "Providence", "dominant_share_pct": 16, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Byram", "high_series": 1, "series_counted": 4, "max_clay_pct": 60, "dominant_drainage": "Moderately well drained", "frost_days": 40, "annual_precip_in": 57.4, "noaa_station_id": "USW00003940", "noaa_station_name": "JACKSON INTL AP, MS US", "median_year_built": 1970, "url": "https://www.foundationrepairhq.com/city/jackson-ms" }, { "slug": "laredo-tx", "city": "Laredo", "state": "Texas", "state_abbr": "TX", "latitude": 27.5036, "longitude": -99.5076, "dominant_series": "Catarina", "dominant_share_pct": 12, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Catarina", "high_series": 1, "series_counted": 4, "max_clay_pct": 51, "dominant_drainage": "Moderately well drained", "frost_days": 5, "annual_precip_in": 19.7, "noaa_station_id": "USC00415060", "noaa_station_name": "LAREDO 2, TX US", "median_year_built": 1995, "url": "https://www.foundationrepairhq.com/city/laredo-tx" }, { "slug": "mckinney-tx", "city": "McKinney", "state": "Texas", "state_abbr": "TX", "latitude": 33.1972, "longitude": -96.6398, "dominant_series": "Houston Black", "dominant_share_pct": 10, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Houston Black", "high_series": 1, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Moderately well drained", "frost_days": 48, "annual_precip_in": 38.3, "noaa_station_id": "USW00053914", "noaa_station_name": "MCKINNEY MUNI AP, TX US", "median_year_built": 2006, "url": "https://www.foundationrepairhq.com/city/mckinney-tx" }, { "slug": "memphis-tn", "city": "Memphis", "state": "Tennessee", "state_abbr": "TN", "latitude": 35.1495, "longitude": -90.049, "dominant_series": "Grenada", "dominant_share_pct": 12, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Sharkey", "high_series": 1, "series_counted": 4, "max_clay_pct": 75, "dominant_drainage": "Moderately well drained", "frost_days": 44, "annual_precip_in": 54.9, "noaa_station_id": "USW00013893", "noaa_station_name": "MEMPHIS INTL AP, TN US", "median_year_built": 1970, "url": "https://www.foundationrepairhq.com/city/memphis-tn" }, { "slug": "plano-tx", "city": "Plano", "state": "Texas", "state_abbr": "TX", "latitude": 33.0198, "longitude": -96.6989, "dominant_series": "Eddy", "dominant_share_pct": 11, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Heiden", "high_series": 3, "series_counted": 4, "max_clay_pct": 54, "dominant_drainage": "Well drained", "frost_days": 23, "annual_precip_in": 38.3, "noaa_station_id": "USW00013960", "noaa_station_name": "DALLAS LOVE FLD, TX US", "median_year_built": 1993, "url": "https://www.foundationrepairhq.com/city/plano-tx" }, { "slug": "round-rock-tx", "city": "Round Rock", "state": "Texas", "state_abbr": "TX", "latitude": 30.5083, "longitude": -97.6789, "dominant_series": "Heiden", "dominant_share_pct": 9, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Heiden", "high_series": 4, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Well drained", "frost_days": 12, "annual_precip_in": 36.3, "noaa_station_id": "USW00013958", "noaa_station_name": "AUSTIN-CAMP MABRY, TX US", "median_year_built": 2001, "url": "https://www.foundationrepairhq.com/city/round-rock-tx" }, { "slug": "san-antonio-tx", "city": "San Antonio", "state": "Texas", "state_abbr": "TX", "latitude": 29.4241, "longitude": -98.4936, "dominant_series": "Houston Black", "dominant_share_pct": 8, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Houston Black", "high_series": 2, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Moderately well drained", "frost_days": 14, "annual_precip_in": 32.4, "noaa_station_id": "USW00012921", "noaa_station_name": "SAN ANTONIO INTL AP, TX US", "median_year_built": 1983, "url": "https://www.foundationrepairhq.com/city/san-antonio-tx" }, { "slug": "shreveport-la", "city": "Shreveport", "state": "Louisiana", "state_abbr": "LA", "latitude": 32.5252, "longitude": -93.7502, "dominant_series": "Moreland", "dominant_share_pct": 11, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Moreland", "high_series": 2, "series_counted": 4, "max_clay_pct": 69, "dominant_drainage": "Somewhat poorly drained", "frost_days": 30, "annual_precip_in": 51.4, "noaa_station_id": "USW00013957", "noaa_station_name": "SHREVEPORT, LA US", "median_year_built": 1973, "url": "https://www.foundationrepairhq.com/city/shreveport-la" }, { "slug": "st-louis-mo", "city": "St. Louis", "state": "Missouri", "state_abbr": "MO", "latitude": 38.627, "longitude": -90.1994, "dominant_series": "Menfro", "dominant_share_pct": 16, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Darwin", "high_series": 1, "series_counted": 4, "max_clay_pct": 52, "dominant_drainage": "Well drained", "frost_days": 85, "annual_precip_in": 41.7, "noaa_station_id": "USW00013994", "noaa_station_name": "ST LOUIS LAMBERT INTL AP, MO US", "median_year_built": 1938, "url": "https://www.foundationrepairhq.com/city/st-louis-mo" }, { "slug": "temple-tx", "city": "Temple", "state": "Texas", "state_abbr": "TX", "latitude": 31.0982, "longitude": -97.3428, "dominant_series": "Heiden", "dominant_share_pct": 11, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Heiden", "high_series": 4, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Well drained", "frost_days": 33, "annual_precip_in": 37, "noaa_station_id": "USC00418646", "noaa_station_name": "STILLHOUSE HOLLOW DAM, TX US", "median_year_built": 1988, "url": "https://www.foundationrepairhq.com/city/temple-tx" }, { "slug": "waco-tx", "city": "Waco", "state": "Texas", "state_abbr": "TX", "latitude": 31.5493, "longitude": -97.1467, "dominant_series": "Weswood", "dominant_share_pct": 7, "shrink_swell_class": "Very High", "max_lep_pct": 17, "max_lep_series": "Heiden", "high_series": 3, "series_counted": 4, "max_clay_pct": 68, "dominant_drainage": "Well drained", "frost_days": 34, "annual_precip_in": 36.4, "noaa_station_id": "USW00013959", "noaa_station_name": "WACO RGNL AP, TX US", "median_year_built": 1976, "url": "https://www.foundationrepairhq.com/city/waco-tx" }, { "slug": "houston-tx", "city": "Houston", "state": "Texas", "state_abbr": "TX", "latitude": 29.7604, "longitude": -95.3698, "dominant_series": "Bernard", "dominant_share_pct": 11, "shrink_swell_class": "Very High", "max_lep_pct": 13.6, "max_lep_series": "Lake Charles", "high_series": 4, "series_counted": 4, "max_clay_pct": 61, "dominant_drainage": "Somewhat poorly drained", "frost_days": 4, "annual_precip_in": 55.6, "noaa_station_id": "USW00012918", "noaa_station_name": "HOUSTON HOBBY AP, TX US", "median_year_built": 1980, "url": "https://www.foundationrepairhq.com/city/houston-tx" }, { "slug": "kansas-city-mo", "city": "Kansas City", "state": "Missouri", "state_abbr": "MO", "latitude": 39.0997, "longitude": -94.5786, "dominant_series": "Knox", "dominant_share_pct": 14, "shrink_swell_class": "Very High", "max_lep_pct": 11, "max_lep_series": "Snead", "high_series": 3, "series_counted": 4, "max_clay_pct": 61, "dominant_drainage": "Well drained", "frost_days": 93, "annual_precip_in": 38.1, "noaa_station_id": "USW00013988", "noaa_station_name": "KANSAS CITY DOWNTOWN AP, MO US", "median_year_built": 1968, "url": "https://www.foundationrepairhq.com/city/kansas-city-mo" }, { "slug": "nashville-tn", "city": "Nashville", "state": "Tennessee", "state_abbr": "TN", "latitude": 36.1627, "longitude": -86.7816, "dominant_series": "Mimosa", "dominant_share_pct": 15, "shrink_swell_class": "Very High", "max_lep_pct": 9.2, "max_lep_series": "Mimosa", "high_series": 2, "series_counted": 4, "max_clay_pct": 61, "dominant_drainage": "Well drained", "frost_days": 66, "annual_precip_in": 50.5, "noaa_station_id": "USW00013897", "noaa_station_name": "NASHVILLE INTL AP, TN US", "median_year_built": 1984, "url": "https://www.foundationrepairhq.com/city/nashville-tn" }, { "slug": "springfield-mo", "city": "Springfield", "state": "Missouri", "state_abbr": "MO", "latitude": 37.209, "longitude": -93.2923, "dominant_series": "Goss", "dominant_share_pct": 13, "shrink_swell_class": "Very High", "max_lep_pct": 9.2, "max_lep_series": "Goss", "high_series": 2, "series_counted": 4, "max_clay_pct": 70, "dominant_drainage": "Well drained", "frost_days": 95, "annual_precip_in": 44.7, "noaa_station_id": "USW00013995", "noaa_station_name": "SPRINGFIELD, MO US", "median_year_built": 1976, "url": "https://www.foundationrepairhq.com/city/springfield-mo" }, { "slug": "beaumont-tx", "city": "Beaumont", "state": "Texas", "state_abbr": "TX", "latitude": 30.0802, "longitude": -94.1266, "dominant_series": "Evadale", "dominant_share_pct": 6, "shrink_swell_class": "Very High", "max_lep_pct": 9, "max_lep_series": "Evadale", "high_series": 4, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Poorly drained", "frost_days": 8, "annual_precip_in": 62.1, "noaa_station_id": "USW00012917", "noaa_station_name": "PORT ARTHUR SE TX AP, TX US", "median_year_built": 1977, "url": "https://www.foundationrepairhq.com/city/beaumont-tx" }, { "slug": "arlington-tx", "city": "Arlington", "state": "Texas", "state_abbr": "TX", "latitude": 32.7357, "longitude": -97.1081, "dominant_series": "Frio", "dominant_share_pct": 4, "shrink_swell_class": "High", "max_lep_pct": 8.3, "max_lep_series": "Frio", "high_series": 2, "series_counted": 4, "max_clay_pct": 48, "dominant_drainage": "Well drained", "frost_days": 29, "annual_precip_in": 37, "noaa_station_id": "USW00003927", "noaa_station_name": "DALLAS FT WORTH AP, TX US", "median_year_built": 1984, "url": "https://www.foundationrepairhq.com/city/arlington-tx" }, { "slug": "denver-co", "city": "Denver", "state": "Colorado", "state_abbr": "CO", "latitude": 39.7392, "longitude": -104.9903, "dominant_series": "Elyria", "dominant_share_pct": 7, "shrink_swell_class": "High", "max_lep_pct": 8.3, "max_lep_series": "Denver", "high_series": 2, "series_counted": 4, "max_clay_pct": 50, "dominant_drainage": "Well drained", "frost_days": 156, "annual_precip_in": 15.4, "noaa_station_id": "USW00023062", "noaa_station_name": "DENVER-STAPLETON, CO US", "median_year_built": 1972, "url": "https://www.foundationrepairhq.com/city/denver-co" }, { "slug": "tulsa-ok", "city": "Tulsa", "state": "Oklahoma", "state_abbr": "OK", "latitude": 36.154, "longitude": -95.9928, "dominant_series": "Dennis", "dominant_share_pct": 5, "shrink_swell_class": "High", "max_lep_pct": 8.2, "max_lep_series": "Niotaze", "high_series": 2, "series_counted": 4, "max_clay_pct": 45, "dominant_drainage": "Somewhat poorly drained", "frost_days": 72, "annual_precip_in": 41, "noaa_station_id": "USW00013968", "noaa_station_name": "TULSA INTL AP, OK US", "median_year_built": 1972, "url": "https://www.foundationrepairhq.com/city/tulsa-ok" }, { "slug": "raleigh-nc", "city": "Raleigh", "state": "North Carolina", "state_abbr": "NC", "latitude": 35.7796, "longitude": -78.6382, "dominant_series": "Wedowee", "dominant_share_pct": 7, "shrink_swell_class": "High", "max_lep_pct": 8, "max_lep_series": "Creedmoor", "high_series": 1, "series_counted": 4, "max_clay_pct": 53, "dominant_drainage": "Well drained", "frost_days": 65, "annual_precip_in": 46.1, "noaa_station_id": "USW00013722", "noaa_station_name": "RALEIGH DURHAM INTL AP, NC US", "median_year_built": 1995, "url": "https://www.foundationrepairhq.com/city/raleigh-nc" }, { "slug": "amarillo-tx", "city": "Amarillo", "state": "Texas", "state_abbr": "TX", "latitude": 35.222, "longitude": -101.8313, "dominant_series": "Olton", "dominant_share_pct": 7, "shrink_swell_class": "High", "max_lep_pct": 7.8, "max_lep_series": "Pullman", "high_series": 2, "series_counted": 4, "max_clay_pct": 48, "dominant_drainage": "Well drained", "frost_days": 108, "annual_precip_in": 19.7, "noaa_station_id": "USW00023047", "noaa_station_name": "AMARILLO, TX US", "median_year_built": 1972, "url": "https://www.foundationrepairhq.com/city/amarillo-tx" }, { "slug": "abilene-tx", "city": "Abilene", "state": "Texas", "state_abbr": "TX", "latitude": 32.4487, "longitude": -99.7331, "dominant_series": "Rowena", "dominant_share_pct": 7, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Rowena", "high_series": 1, "series_counted": 4, "max_clay_pct": 43, "dominant_drainage": "Well drained", "frost_days": 48, "annual_precip_in": 25.2, "noaa_station_id": "USW00013962", "noaa_station_name": "ABILENE RGNL AP, TX US", "median_year_built": 1974, "url": "https://www.foundationrepairhq.com/city/abilene-tx" }, { "slug": "birmingham-al", "city": "Birmingham", "state": "Alabama", "state_abbr": "AL", "latitude": 33.5207, "longitude": -86.8025, "dominant_series": "Nauvoo", "dominant_share_pct": 19, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Tupelo", "high_series": 1, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Well drained", "frost_days": 47, "annual_precip_in": 56.6, "noaa_station_id": "USW00013876", "noaa_station_name": "BIRMINGHAM AP, AL US", "median_year_built": 1965, "url": "https://www.foundationrepairhq.com/city/birmingham-al" }, { "slug": "dallas-tx", "city": "Dallas", "state": "Texas", "state_abbr": "TX", "latitude": 32.7767, "longitude": -96.797, "dominant_series": "Eddy", "dominant_share_pct": 7, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Lewisville", "high_series": 2, "series_counted": 4, "max_clay_pct": 46, "dominant_drainage": "Well drained", "frost_days": 23, "annual_precip_in": 38.3, "noaa_station_id": "USW00013960", "noaa_station_name": "DALLAS LOVE FLD, TX US", "median_year_built": 1979, "url": "https://www.foundationrepairhq.com/city/dallas-tx" }, { "slug": "denton-tx", "city": "Denton", "state": "Texas", "state_abbr": "TX", "latitude": 33.2148, "longitude": -97.1331, "dominant_series": "Navo", "dominant_share_pct": 5, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Navo", "high_series": 1, "series_counted": 4, "max_clay_pct": 45, "dominant_drainage": "Moderately well drained", "frost_days": 29, "annual_precip_in": 37, "noaa_station_id": "USW00003927", "noaa_station_name": "DALLAS FT WORTH AP, TX US", "median_year_built": 1992, "url": "https://www.foundationrepairhq.com/city/denton-tx" }, { "slug": "el-paso-tx", "city": "El Paso", "state": "Texas", "state_abbr": "TX", "latitude": 31.7619, "longitude": -106.485, "dominant_series": "Harkey", "dominant_share_pct": 9, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Glendale", "high_series": 1, "series_counted": 4, "max_clay_pct": 45, "dominant_drainage": "Well drained", "frost_days": 42, "annual_precip_in": 8.8, "noaa_station_id": "USW00023044", "noaa_station_name": "EL PASO INTL AP, TX US", "median_year_built": 1983, "url": "https://www.foundationrepairhq.com/city/el-paso-tx" }, { "slug": "fort-worth-tx", "city": "Fort Worth", "state": "Texas", "state_abbr": "TX", "latitude": 32.7555, "longitude": -97.3308, "dominant_series": "Gasil", "dominant_share_pct": 5, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Ovan", "high_series": 1, "series_counted": 4, "max_clay_pct": 48, "dominant_drainage": "Well drained", "frost_days": 33, "annual_precip_in": 35.3, "noaa_station_id": "USW00013961", "noaa_station_name": "FT WORTH MEACHAM FLD, TX US", "median_year_built": 1990, "url": "https://www.foundationrepairhq.com/city/fort-worth-tx" }, { "slug": "killeen-tx", "city": "Killeen", "state": "Texas", "state_abbr": "TX", "latitude": 31.1171, "longitude": -97.7278, "dominant_series": "Lewisville", "dominant_share_pct": 8, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Lewisville", "high_series": 1, "series_counted": 4, "max_clay_pct": 50, "dominant_drainage": "Well drained", "frost_days": 31, "annual_precip_in": 34.8, "noaa_station_id": "USC00414792", "noaa_station_name": "KILLEEN, TX US", "median_year_built": 1994, "url": "https://www.foundationrepairhq.com/city/killeen-tx" }, { "slug": "little-rock-ar", "city": "Little Rock", "state": "Arkansas", "state_abbr": "AR", "latitude": 34.7465, "longitude": -92.2896, "dominant_series": "Carnasaw", "dominant_share_pct": 10, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Carnasaw", "high_series": 1, "series_counted": 4, "max_clay_pct": 53, "dominant_drainage": "Well drained", "frost_days": 50, "annual_precip_in": 50.4, "noaa_station_id": "USW00013963", "noaa_station_name": "LITTLE ROCK AP ADAMS FLD, AR US", "median_year_built": 1978, "url": "https://www.foundationrepairhq.com/city/little-rock-ar" }, { "slug": "phoenix-az", "city": "Phoenix", "state": "Arizona", "state_abbr": "AZ", "latitude": 33.4484, "longitude": -112.074, "dominant_series": "Antho", "dominant_share_pct": 7, "shrink_swell_class": "High", "max_lep_pct": 7.5, "max_lep_series": "Gilman", "high_series": 1, "series_counted": 4, "max_clay_pct": 33, "dominant_drainage": "Somewhat excessively drained", "frost_days": 1, "annual_precip_in": 7.2, "noaa_station_id": "USW00023183", "noaa_station_name": "PHOENIX SKY HARBOR INTL AP, AZ US", "median_year_built": 1984, "url": "https://www.foundationrepairhq.com/city/phoenix-az" }, { "slug": "oklahoma-city-ok", "city": "Oklahoma City", "state": "Oklahoma", "state_abbr": "OK", "latitude": 35.4676, "longitude": -97.5164, "dominant_series": "Teller", "dominant_share_pct": 5, "shrink_swell_class": "Moderate", "max_lep_pct": 5.3, "max_lep_series": "Norge", "high_series": 0, "series_counted": 4, "max_clay_pct": 41, "dominant_drainage": "Well drained", "frost_days": 72, "annual_precip_in": 36.4, "noaa_station_id": "USW00013967", "noaa_station_name": "OKLAHOMA CITY WILL ROGERS AP, OK US", "median_year_built": 1981, "url": "https://www.foundationrepairhq.com/city/oklahoma-city-ok" }, { "slug": "charlotte-nc", "city": "Charlotte", "state": "North Carolina", "state_abbr": "NC", "latitude": 35.2271, "longitude": -80.8431, "dominant_series": "Cecil", "dominant_share_pct": 14, "shrink_swell_class": "Moderate", "max_lep_pct": 5, "max_lep_series": "Mecklenburg", "high_series": 0, "series_counted": 4, "max_clay_pct": 55, "dominant_drainage": "Well drained", "frost_days": 58, "annual_precip_in": 43.6, "noaa_station_id": "USW00013881", "noaa_station_name": "CHARLOTTE DOUGLAS AP, NC US", "median_year_built": 1993, "url": "https://www.foundationrepairhq.com/city/charlotte-nc" }, { "slug": "indianapolis-in", "city": "Indianapolis", "state": "Indiana", "state_abbr": "IN", "latitude": 39.7684, "longitude": -86.1581, "dominant_series": "Miami", "dominant_share_pct": 27, "shrink_swell_class": "Moderate", "max_lep_pct": 4.5, "max_lep_series": "Miami", "high_series": 0, "series_counted": 4, "max_clay_pct": 40, "dominant_drainage": "Moderately well drained", "frost_days": 106, "annual_precip_in": 43.6, "noaa_station_id": "USW00093819", "noaa_station_name": "INDIANAPOLIS, IN US", "median_year_built": 1971, "url": "https://www.foundationrepairhq.com/city/indianapolis-in" }, { "slug": "knoxville-tn", "city": "Knoxville", "state": "Tennessee", "state_abbr": "TN", "latitude": 35.9606, "longitude": -83.9207, "dominant_series": "Dewey", "dominant_share_pct": 10, "shrink_swell_class": "Moderate", "max_lep_pct": 4.5, "max_lep_series": "Dewey", "high_series": 0, "series_counted": 4, "max_clay_pct": 69, "dominant_drainage": "Well drained", "frost_days": 67, "annual_precip_in": 51.9, "noaa_station_id": "USW00013891", "noaa_station_name": "KNOXVILLE MCGHEE TYSON AP, TN US", "median_year_built": 1973, "url": "https://www.foundationrepairhq.com/city/knoxville-tn" }, { "slug": "lubbock-tx", "city": "Lubbock", "state": "Texas", "state_abbr": "TX", "latitude": 33.5779, "longitude": -101.8552, "dominant_series": "Posey", "dominant_share_pct": 10, "shrink_swell_class": "Moderate", "max_lep_pct": 4.5, "max_lep_series": "Bippus", "high_series": 0, "series_counted": 4, "max_clay_pct": 34, "dominant_drainage": "Well drained", "frost_days": 84, "annual_precip_in": 18.3, "noaa_station_id": "USW00023042", "noaa_station_name": "LUBBOCK, TX US", "median_year_built": 1982, "url": "https://www.foundationrepairhq.com/city/lubbock-tx" }, { "slug": "odessa-tx", "city": "Odessa", "state": "Texas", "state_abbr": "TX", "latitude": 31.8457, "longitude": -102.3676, "dominant_series": "Kimbrough", "dominant_share_pct": 9, "shrink_swell_class": "Moderate", "max_lep_pct": 4.5, "max_lep_series": "Reagan", "high_series": 0, "series_counted": 4, "max_clay_pct": 40, "dominant_drainage": "Well drained", "frost_days": 58, "annual_precip_in": 13.5, "noaa_station_id": "USW00023023", "noaa_station_name": "MIDLAND ODESSA, TX US", "median_year_built": 1977, "url": "https://www.foundationrepairhq.com/city/odessa-tx" }, { "slug": "tampa-fl", "city": "Tampa", "state": "Florida", "state_abbr": "FL", "latitude": 27.9506, "longitude": -82.4572, "dominant_series": "Myakka", "dominant_share_pct": 6, "shrink_swell_class": "Moderate", "max_lep_pct": 4.5, "max_lep_series": "Chobee", "high_series": 0, "series_counted": 4, "max_clay_pct": 28, "dominant_drainage": "Poorly drained", "frost_days": 1, "annual_precip_in": 49.5, "noaa_station_id": "USW00012842", "noaa_station_name": "TAMPA INTL AP, FL US", "median_year_built": 1983, "url": "https://www.foundationrepairhq.com/city/tampa-fl" }, { "slug": "tucson-az", "city": "Tucson", "state": "Arizona", "state_abbr": "AZ", "latitude": 32.2226, "longitude": -110.9747, "dominant_series": "Anthony", "dominant_share_pct": 10, "shrink_swell_class": "Moderate", "max_lep_pct": 4.5, "max_lep_series": "Grabe", "high_series": 0, "series_counted": 4, "max_clay_pct": 34, "dominant_drainage": "Well drained", "frost_days": 12, "annual_precip_in": 10.6, "noaa_station_id": "USW00023160", "noaa_station_name": "TUCSON INTL AP, AZ US", "median_year_built": 1979, "url": "https://www.foundationrepairhq.com/city/tucson-az" }, { "slug": "tyler-tx", "city": "Tyler", "state": "Texas", "state_abbr": "TX", "latitude": 32.3513, "longitude": -95.3011, "dominant_series": "Pickton", "dominant_share_pct": 11, "shrink_swell_class": "Moderate", "max_lep_pct": 4.5, "max_lep_series": "Cuthbert", "high_series": 0, "series_counted": 4, "max_clay_pct": 48, "dominant_drainage": "Well drained", "frost_days": 29, "annual_precip_in": 42.1, "noaa_station_id": "USW00013972", "noaa_station_name": "TYLER POUNDS FLD, TX US", "median_year_built": 1978, "url": "https://www.foundationrepairhq.com/city/tyler-tx" }, { "slug": "midland-tx", "city": "Midland", "state": "Texas", "state_abbr": "TX", "latitude": 31.9973, "longitude": -102.0779, "dominant_series": "Amarillo", "dominant_share_pct": 8, "shrink_swell_class": "Moderate", "max_lep_pct": 3.7, "max_lep_series": "Kimbrough", "high_series": 0, "series_counted": 4, "max_clay_pct": 34, "dominant_drainage": "Well drained", "frost_days": 58, "annual_precip_in": 13.5, "noaa_station_id": "USW00023023", "noaa_station_name": "MIDLAND ODESSA, TX US", "median_year_built": 1986, "url": "https://www.foundationrepairhq.com/city/midland-tx" }, { "slug": "columbia-sc", "city": "Columbia", "state": "South Carolina", "state_abbr": "SC", "latitude": 34.0007, "longitude": -81.0348, "dominant_series": "Vaucluse", "dominant_share_pct": 7, "shrink_swell_class": "Moderate", "max_lep_pct": 3, "max_lep_series": "Nanford", "high_series": 0, "series_counted": 4, "max_clay_pct": 50, "dominant_drainage": "Well drained", "frost_days": 47, "annual_precip_in": 45.2, "noaa_station_id": "USW00013883", "noaa_station_name": "COLUMBIA, SC US", "median_year_built": 1977, "url": "https://www.foundationrepairhq.com/city/columbia-sc" }, { "slug": "atlanta-ga", "city": "Atlanta", "state": "Georgia", "state_abbr": "GA", "latitude": 33.749, "longitude": -84.388, "dominant_series": "Madison", "dominant_share_pct": 12, "shrink_swell_class": "Low", "max_lep_pct": 2.5, "max_lep_series": "Gwinnett", "high_series": 0, "series_counted": 4, "max_clay_pct": 53, "dominant_drainage": "Well drained", "frost_days": 36, "annual_precip_in": 50.4, "noaa_station_id": "USW00013874", "noaa_station_name": "ATLANTA HARTSFIELD INTL AP, GA US", "median_year_built": 1985, "url": "https://www.foundationrepairhq.com/city/atlanta-ga" }, { "slug": "jacksonville-fl", "city": "Jacksonville", "state": "Florida", "state_abbr": "FL", "latitude": 30.3322, "longitude": -81.6557, "dominant_series": "Pelham", "dominant_share_pct": 6, "shrink_swell_class": "Low", "max_lep_pct": 1.5, "max_lep_series": "Pelham", "high_series": 0, "series_counted": 4, "max_clay_pct": 29, "dominant_drainage": "Poorly drained", "frost_days": 14, "annual_precip_in": 53.4, "noaa_station_id": "USW00013889", "noaa_station_name": "JACKSONVILLE, FL US", "median_year_built": 1986, "url": "https://www.foundationrepairhq.com/city/jacksonville-fl" }, { "slug": "orlando-fl", "city": "Orlando", "state": "Florida", "state_abbr": "FL", "latitude": 28.5383, "longitude": -81.3792, "dominant_series": "Candler", "dominant_share_pct": 7, "shrink_swell_class": "Low", "max_lep_pct": 1.5, "max_lep_series": "Candler", "high_series": 0, "series_counted": 4, "max_clay_pct": 6, "dominant_drainage": "Excessively drained", "frost_days": 2, "annual_precip_in": 51.5, "noaa_station_id": "USW00012815", "noaa_station_name": "ORLANDO INTL AP, FL US", "median_year_built": 1990, "url": "https://www.foundationrepairhq.com/city/orlando-fl" } ] }