{
  "city": "Charlotte",
  "state": "NC",
  "slug": "charlotte",
  "hardness_facts": [
    {
      "utility": "Charlotte Water",
      "measure": "Total hardness",
      "value_as_published": "Average 32 ppm, range 27-35 ppm",
      "period": "Calendar year 2025",
      "source_title": "2025 Annual Drinking Water Quality Report (Consumer Confidence Report 2025 - Charlotte Water)",
      "source_url": "https://www.charlottenc.gov/files/sharedassets/cltwater/v/3/documents/water-quality/ccr/current-consumer-confidence-report.pdf"
    }
  ],
  "published_span_mg_per_l": [
    27,
    35
  ],
  "span_converted_from_grains": false,
  "usgs_class": "soft",
  "usgs_class_source": "https://www.usgs.gov/water-science-school/science/hardness-water",
  "notes": [
    "A single September 2026 sample at the Franklin plant, posted on Charlotte Water's site, read 39 ppm."
  ],
  "local_details": {
    "disinfectant": {
      "text": "Charlotte Water adds chlorine to prevent bacterial growth.",
      "kind": "chlorine",
      "source_title": "Charlotte Water 2025 Annual Drinking Water Quality Report",
      "source_url": "https://www.charlottenc.gov/files/sharedassets/cltwater/v/3/documents/water-quality/ccr/current-consumer-confidence-report.pdf",
      "evidence_ids": [
        "CHARLO-L-01"
      ]
    },
    "source_water": {
      "text": "Charlotte water comes from Mountain Island Lake and Lake Norman on the Catawba River.",
      "source_title": "Charlotte Water 2025 Annual Drinking Water Quality Report",
      "source_url": "https://www.charlottenc.gov/files/sharedassets/cltwater/v/3/documents/water-quality/ccr/current-consumer-confidence-report.pdf",
      "evidence_ids": [
        "CHARLO-L-02"
      ]
    }
  },
  "sources_checked_on": "2026-10-27",
  "site": "https://charlottewatersystems.com/",
  "brand": "Charlotte Water Systems by My Home Water System",
  "taking_requests": false
}