{
  "city": "New York City",
  "state": "NY",
  "slug": "new-york",
  "hardness_facts": [
    {
      "utility": "NYC DEP",
      "measure": "Total hardness",
      "value_as_published": "Average 32 mg/L (2 grains per gallon), range 18-100 mg/L",
      "period": "Calendar year 2025",
      "source_title": "New York City Drinking Water Supply and Quality Report 2025",
      "source_url": "https://www.nyc.gov/assets/dep/downloads/pdf/water/drinking-water/drinking-water-supply-quality-report/2025-drinking-water-supply-quality-report.pdf"
    }
  ],
  "published_span_mg_per_l": [
    18,
    100
  ],
  "span_converted_from_grains": false,
  "usgs_class": "soft to moderately hard",
  "usgs_class_source": "https://www.usgs.gov/water-science-school/science/hardness-water",
  "notes": [],
  "local_details": {
    "disinfectant": {
      "text": "New York City disinfects with chlorine, and Croton water also gets ultraviolet light. The 2025 report does not mention chloramine.",
      "kind": "chlorine",
      "source_title": "NYC 2025 Drinking Water Supply and Quality Report",
      "source_url": "https://www.nyc.gov/assets/dep/downloads/pdf/water/drinking-water/drinking-water-supply-quality-report/2025-drinking-water-supply-quality-report.pdf",
      "evidence_ids": [
        "NEWYOR-L-01"
      ]
    },
    "source_water": {
      "text": "New York City water comes from upstate reservoirs: the Catskill and Delaware systems supplied 91.3 percent in 2025 and the Croton system 8.7 percent.",
      "source_title": "NYC 2025 Drinking Water Supply and Quality Report",
      "source_url": "https://www.nyc.gov/assets/dep/downloads/pdf/water/drinking-water/drinking-water-supply-quality-report/2025-drinking-water-supply-quality-report.pdf",
      "evidence_ids": [
        "NEWYOR-L-02"
      ]
    }
  },
  "sources_checked_on": "2026-10-27",
  "site": "https://nycwatersystems.com/",
  "brand": "NYC Water Systems by My Home Water System",
  "taking_requests": false
}