{
  "method": "One residential assessor parcel with housing units > 0 and valid year 1800-2026, joined to a county address point inside the official city polygon. Prefer primary address then lowest county object ID. Point-in-polygon overlay of Utah 2024-reporting-year culinary service areas. ZIP means address ZIP within the city, not whole ZIP. Not dwelling/customer counts or observed pipe materials.",
  "analysis_date": "2026-09-11",
  "tax_years": {
    "2025": 28153
  },
  "invalid_residential_years": 6,
  "all": {
    "records": 28153,
    "median_year": 1981,
    "from1990to2009": 7269,
    "before2005": 25636,
    "before1980": 13423,
    "before1986": 16386,
    "decades": {
      "1870": 1,
      "1880": 14,
      "1890": 28,
      "1900": 46,
      "1910": 60,
      "1920": 88,
      "1930": 104,
      "1940": 179,
      "1950": 471,
      "1960": 889,
      "1970": 11543,
      "1980": 5935,
      "1990": 5087,
      "2000": 2182,
      "2010": 1175,
      "2020": 351
    }
  },
  "by_zip": {
    "84047": {
      "records": 468,
      "median_year": 1993.0,
      "from1990to2009": 242,
      "before2005": 411,
      "before1980": 34,
      "before1986": 96,
      "decades": {
        "1890": 1,
        "1900": 1,
        "1910": 2,
        "1920": 4,
        "1930": 6,
        "1940": 1,
        "1950": 5,
        "1960": 1,
        "1970": 13,
        "1980": 143,
        "1990": 190,
        "2000": 52,
        "2010": 49
      }
    },
    "84070": {
      "records": 6977,
      "median_year": 1978,
      "from1990to2009": 1833,
      "before2005": 5866,
      "before1980": 3676,
      "before1986": 4052,
      "decades": {
        "1870": 1,
        "1880": 13,
        "1890": 25,
        "1900": 43,
        "1910": 53,
        "1920": 74,
        "1930": 90,
        "1940": 161,
        "1950": 409,
        "1960": 632,
        "1970": 2175,
        "1980": 646,
        "1990": 1018,
        "2000": 815,
        "2010": 641,
        "2020": 181
      }
    },
    "84092": {
      "records": 8758,
      "median_year": 1985.0,
      "from1990to2009": 2798,
      "before2005": 8032,
      "before1980": 3220,
      "before1986": 4435,
      "decades": {
        "1890": 1,
        "1910": 4,
        "1920": 2,
        "1930": 3,
        "1940": 8,
        "1950": 25,
        "1960": 39,
        "1970": 3138,
        "1980": 2336,
        "1990": 2012,
        "2000": 786,
        "2010": 258,
        "2020": 146
      }
    },
    "84093": {
      "records": 5423,
      "median_year": 1978,
      "from1990to2009": 635,
      "before2005": 5359,
      "before1980": 3409,
      "before1986": 4050,
      "decades": {
        "1930": 1,
        "1940": 2,
        "1950": 10,
        "1960": 43,
        "1970": 3353,
        "1980": 1349,
        "1990": 564,
        "2000": 71,
        "2010": 26,
        "2020": 4
      }
    },
    "84094": {
      "records": 6527,
      "median_year": 1981,
      "from1990to2009": 1761,
      "before2005": 5968,
      "before1980": 3084,
      "before1986": 3753,
      "decades": {
        "1880": 1,
        "1890": 1,
        "1900": 2,
        "1910": 1,
        "1920": 8,
        "1930": 4,
        "1940": 7,
        "1950": 22,
        "1960": 174,
        "1970": 2864,
        "1980": 1461,
        "1990": 1303,
        "2000": 458,
        "2010": 201,
        "2020": 20
      }
    }
  },
  "overlap": 0,
  "unmatched": 5,
  "publisher": "Mountain Man Plumbing",
  "area": "Sandy, Utah",
  "providers": {
    "White City WID": {
      "records": 2126,
      "median_year": 1978.0,
      "from1990to2009": 534,
      "before2005": 2056,
      "before1980": 1124,
      "before1986": 1447,
      "decades": {
        "1930": 1,
        "1940": 3,
        "1950": 6,
        "1960": 16,
        "1970": 1098,
        "1980": 465,
        "1990": 334,
        "2000": 200,
        "2010": 3
      },
      "by_zip": {
        "84094": 652,
        "84070": 2,
        "84092": 1470,
        "84093": 2
      }
    },
    "Jordan Valley Water Conservancy District (Retail)": {
      "records": 485,
      "median_year": 1976,
      "from1990to2009": 76,
      "before2005": 476,
      "before1980": 352,
      "before1986": 383,
      "decades": {
        "1950": 4,
        "1960": 29,
        "1970": 319,
        "1980": 53,
        "1990": 63,
        "2000": 13,
        "2010": 3,
        "2020": 1
      },
      "by_zip": {
        "84093": 484,
        "84047": 1
      }
    },
    "Salt Lake City Water System": {
      "records": 26,
      "median_year": 2004.0,
      "from1990to2009": 12,
      "before2005": 13,
      "before1980": 6,
      "before1986": 6,
      "decades": {
        "1930": 1,
        "1940": 1,
        "1950": 1,
        "1960": 3,
        "1990": 2,
        "2000": 10,
        "2010": 8
      },
      "by_zip": {
        "84093": 26
      }
    },
    "Sandy City Water System": {
      "records": 25511,
      "median_year": 1982,
      "from1990to2009": 6646,
      "before2005": 23086,
      "before1980": 11937,
      "before1986": 14546,
      "decades": {
        "1870": 1,
        "1880": 14,
        "1890": 28,
        "1900": 46,
        "1910": 60,
        "1920": 88,
        "1930": 102,
        "1940": 175,
        "1950": 459,
        "1960": 838,
        "1970": 10126,
        "1980": 5417,
        "1990": 4687,
        "2000": 1959,
        "2010": 1161,
        "2020": 350
      },
      "by_zip": {
        "84047": 467,
        "84070": 6975,
        "84093": 4910,
        "84094": 5871,
        "84092": 7288
      }
    }
  },
  "sources": [
    {
      "dataset": "slco-parcel-owners.ndjson",
      "sha256": "d970d9aa0c85e6664637ee5046495c42ed0985aa36afe5a540a8b71876ef3de0"
    },
    {
      "dataset": "features.arcgis.ndjson",
      "sha256": "2fb8a47f1c8cfe8c6745e0898baf29f413cd7d3c7e8afce35b63c763f881e1ad"
    },
    {
      "dataset": "features.geojson",
      "sha256": "b7862cb103e1e911864826dc9f75d5327d1e16b2697c0a5b687ff2dc3a884086"
    },
    {
      "dataset": "ugrc_culinary_water_service_areas_slco.features.arcgis.ndjson",
      "sha256": "75854de6965161fac9f7f55347d143e515753149919ef10d81ddd958464d82c1"
    }
  ],
  "notes": [
    "Aggregate residential parcels, not individual housing units, utility accounts or current pipe ages.",
    "City boundary and 2024 water-provider records; verify utility service with the provider.",
    "No owner names, addresses or individual property locations are published."
  ]
}