{
  "city": "Miami",
  "state": "FL",
  "slug": "miami",
  "hardness_facts": [],
  "published_span_mg_per_l": null,
  "span_converted_from_grains": false,
  "usgs_class": null,
  "usgs_class_source": "https://www.usgs.gov/water-science-school/science/hardness-water",
  "notes": [
    "None of Miami-Dade's water quality reports we read (2003, 2013, 2014, 2015, 2023 and 2025) publishes a hardness figure.",
    "The U.S. Geological Survey Ground Water Atlas describes Biscayne Aquifer water as hard, with no number. That describes untreated aquifer water, not tap water."
  ],
  "local_details": {
    "disinfectant": {
      "text": "The Miami-Dade main system, which serves the City of Miami, keeps the water disinfected with chloramine.",
      "kind": "chloramine",
      "source_title": "Miami-Dade WASD 2025 Water Quality Report",
      "source_url": "https://www.miamidade.gov/resources/water/documents/2025-water-quality-report.pdf",
      "evidence_ids": [
        "MIAMI-L-01"
      ]
    },
    "source_water": {
      "text": "Most Miami-Dade water comes from the Biscayne Aquifer, treated at the Hialeah, John E. Preston and Alexander Orr Jr. plants. The Hialeah reverse osmosis plant draws from the deeper Upper Floridan Aquifer.",
      "source_title": "Miami-Dade WASD 2025 Water Quality Report",
      "source_url": "https://www.miamidade.gov/resources/water/documents/2025-water-quality-report.pdf",
      "evidence_ids": [
        "MIAMI-L-02"
      ]
    },
    "softening": {
      "text": "Partly. Water from the Alexander Orr Jr. plant gets lime treatment to reduce hardness before it is disinfected and filtered.",
      "source_title": "Miami-Dade WASD 2025 Water Quality Report",
      "source_url": "https://www.miamidade.gov/resources/water/documents/2025-water-quality-report.pdf",
      "evidence_ids": [
        "MIAMI-L-03"
      ]
    },
    "by_area": {
      "text": "The Orr plant generally serves areas south of SW 8 Street, and the Hialeah and Preston plants serve areas north of it.",
      "source_title": "Miami-Dade WASD 2025 Water Quality Report",
      "source_url": "https://www.miamidade.gov/resources/water/documents/2025-water-quality-report.pdf",
      "evidence_ids": [
        "MIAMI-L-04"
      ]
    }
  },
  "sources_checked_on": "2026-10-27",
  "site": "https://miamihomewatersystems.com/",
  "brand": "Miami Home Water Systems by My Home Water System",
  "taking_requests": false
}