{
  "city": "Dallas",
  "state": "TX",
  "slug": "dallas",
  "hardness_facts": [
    {
      "utility": "Dallas Water Utilities",
      "measure": "Total hardness",
      "value_as_published": "Average 119 mg/L, range 92-167 mg/L",
      "period": "Calendar year 2003",
      "source_title": "2003 Dallas Drinking Water Quality Report",
      "source_url": "https://dallascityhall.com/departments/waterutilities/DCH%20Documents/pdf/03engWQR.pdf"
    }
  ],
  "published_span_mg_per_l": [
    92,
    167
  ],
  "span_converted_from_grains": false,
  "usgs_class": "moderately hard to hard",
  "usgs_class_source": "https://www.usgs.gov/water-science-school/science/hardness-water",
  "notes": [
    "The newest Dallas report we found that publishes hardness covers 2003. Later reports we checked, through 2025, have no hardness line."
  ],
  "local_details": {
    "disinfectant": {
      "text": "Dallas Water Utilities disinfects with chloramine instead of chlorine.",
      "kind": "chloramine",
      "source_title": "Dallas Water Utilities water quality information page",
      "source_url": "https://dallascityhall.com/departments/waterutilities/pages/water_quality_information.aspx",
      "evidence_ids": [
        "DALLAS-L-01"
      ]
    },
    "source_water": {
      "text": "Dallas uses surface water from the Elm Fork of the Trinity River and lakes Ray Roberts, Lewisville, Grapevine, Ray Hubbard, Tawakoni and Fork, treated at the East Side, Elm Fork and Bachman plants.",
      "source_title": "Dallas Water Quality Report",
      "source_url": "https://dallascityhall.com/departments/waterutilities/DCH%20Documents/pdf/water-quality-report.pdf",
      "evidence_ids": [
        "DALLAS-L-02"
      ]
    }
  },
  "sources_checked_on": "2026-10-27",
  "site": "https://dallaswatersystems.com/",
  "brand": "Dallas Water Systems by My Home Water System",
  "taking_requests": false
}