{
  "city": "Scottsdale",
  "state": "AZ",
  "slug": "scottsdale",
  "hardness_facts": [
    {
      "utility": "City of Scottsdale",
      "measure": "Approximate hardness, south of Indian School Rd",
      "value_as_published": "13-15 grains per gallon (230-260 mg/L)",
      "period": "Calendar year 2025",
      "source_title": "Scottsdale 2026 Water Quality Report",
      "source_url": "https://www.scottsdaleaz.gov/docs/default-source/scottsdaleaz/water/water-quality/annual-reports/2026-water-quality-report.pdf?sfvrsn=18a67596_1"
    },
    {
      "utility": "City of Scottsdale",
      "measure": "Approximate hardness, Indian School Rd to Chaparral Rd",
      "value_as_published": "13-17 grains per gallon (215-285 mg/L)",
      "period": "Calendar year 2025",
      "source_title": "Scottsdale 2026 Water Quality Report",
      "source_url": "https://www.scottsdaleaz.gov/docs/default-source/scottsdaleaz/water/water-quality/annual-reports/2026-water-quality-report.pdf?sfvrsn=18a67596_1"
    },
    {
      "utility": "City of Scottsdale",
      "measure": "Approximate hardness, north of Chaparral Rd",
      "value_as_published": "13-17 grains per gallon (230-290 mg/L)",
      "period": "Calendar year 2025",
      "source_title": "Scottsdale 2026 Water Quality Report",
      "source_url": "https://www.scottsdaleaz.gov/docs/default-source/scottsdaleaz/water/water-quality/annual-reports/2026-water-quality-report.pdf?sfvrsn=18a67596_1"
    }
  ],
  "published_span_mg_per_l": [
    215,
    290
  ],
  "span_converted_from_grains": false,
  "usgs_class": "very hard",
  "usgs_class_source": "https://www.usgs.gov/water-science-school/science/hardness-water",
  "notes": [
    "Scottsdale's 2025 supply was 71 percent Central Arizona Project, 13 percent Salt River Project, 8 percent groundwater and 8 percent recycled water.",
    "Scottsdale disinfects with chlorine. Its 2025 residual averaged 0.64 ppm.",
    "The city's undated hard water fact sheet lists higher figures for the same areas, up to 22-25 grains per gallon south of Indian School Rd. The current annual report figures are shown above."
  ],
  "local_details": {
    "disinfectant": {
      "text": "Scottsdale uses chlorine to keep treated water disinfected.",
      "kind": "chlorine",
      "source_title": "Scottsdale 2026 Water Quality Report",
      "source_url": "https://www.scottsdaleaz.gov/docs/default-source/scottsdaleaz/water/water-quality/annual-reports/2026-water-quality-report.pdf?sfvrsn=18a67596_1",
      "evidence_ids": [
        "SCOTTS-L-01"
      ]
    },
    "source_water": {
      "text": "Scottsdale gets most of its surface water from the Colorado River, plus Salt and Verde River water, deep aquifer wells and recycled water.",
      "source_title": "Scottsdale 2026 Water Quality Report",
      "source_url": "https://www.scottsdaleaz.gov/docs/default-source/scottsdaleaz/water/water-quality/annual-reports/2026-water-quality-report.pdf?sfvrsn=18a67596_1",
      "evidence_ids": [
        "SCOTTS-L-02"
      ]
    },
    "seasonal": {
      "text": "Depending on the time of year, weather and demand, a home may get water from one source or a mix of sources.",
      "source_title": "Scottsdale 2026 Water Quality Report",
      "source_url": "https://www.scottsdaleaz.gov/docs/default-source/scottsdaleaz/water/water-quality/annual-reports/2026-water-quality-report.pdf?sfvrsn=18a67596_1",
      "evidence_ids": [
        "SCOTTS-L-03"
      ]
    },
    "by_area": {
      "text": "Scottsdale says hardness varies across the city and publishes a table of it by area in its report.",
      "source_title": "Scottsdale 2026 Water Quality Report",
      "source_url": "https://www.scottsdaleaz.gov/docs/default-source/scottsdaleaz/water/water-quality/annual-reports/2026-water-quality-report.pdf?sfvrsn=18a67596_1",
      "evidence_ids": [
        "SCOTTS-L-04"
      ]
    }
  },
  "sources_checked_on": "2026-10-26",
  "site": "https://scottsdalewatersystems.com/",
  "brand": "Scottsdale Water Systems by My Home Water System",
  "taking_requests": true
}