{
  "city": "Jacksonville",
  "state": "FL",
  "slug": "jacksonville",
  "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": [
    "JEA's website stopped us with a bot check, so we have not read its water quality report and do not show a figure.",
    "The nearest published measure we found is a 1977 U.S. Geological Survey report that put Floridan aquifer water in metropolitan Jacksonville at about 250 to more than 300 mg/L hardness. That is untreated groundwater, not JEA tap water."
  ],
  "local_details": {},
  "sources_checked_on": "2026-10-27",
  "site": "https://jacksonvillewatersystems.com/",
  "brand": "Jacksonville Water Systems by My Home Water System",
  "taking_requests": false
}