{
  "version": 1,
  "title": "Water Quality Sampling",
  "fields": [
    {
      "id": "sample_id",
      "type": "barcode",
      "label": "Sample ID",
      "required": true,
      "hint": "Scan sample container label"
    },
    {
      "id": "location",
      "type": "geopoint",
      "label": "Sampling Location",
      "required": true
    },
    {
      "id": "sample_date",
      "type": "date",
      "label": "Sampling Date",
      "required": true
    },
    {
      "id": "water_source",
      "type": "select_one",
      "label": "Water Source Type",
      "required": true,
      "options": [
        {"value": "river", "label": "River / Stream"},
        {"value": "lake", "label": "Lake / Reservoir"},
        {"value": "groundwater", "label": "Groundwater / Well"},
        {"value": "tap", "label": "Tap Water"},
        {"value": "canal", "label": "Irrigation Canal"},
        {"value": "coastal", "label": "Coastal / Estuary"},
        {"value": "other", "label": "Other"}
      ]
    },
    {
      "id": "ph",
      "type": "number",
      "label": "pH",
      "hint": "Normal drinking water range: 6.5–8.5"
    },
    {
      "id": "turbidity_ntu",
      "type": "number",
      "label": "Turbidity (NTU)"
    },
    {
      "id": "dissolved_oxygen",
      "type": "number",
      "label": "Dissolved Oxygen (mg/L)"
    },
    {
      "id": "conductivity_us",
      "type": "number",
      "label": "Conductivity (µS/cm)"
    },
    {
      "id": "color",
      "type": "select_one",
      "label": "Water Color",
      "options": [
        {"value": "clear", "label": "Clear"},
        {"value": "light_brown", "label": "Light Brown"},
        {"value": "dark_brown", "label": "Dark Brown"},
        {"value": "green", "label": "Green (algae)"},
        {"value": "gray", "label": "Gray"},
        {"value": "other", "label": "Other"}
      ]
    },
    {
      "id": "odor",
      "type": "select_one",
      "label": "Odor",
      "options": [
        {"value": "none", "label": "None"},
        {"value": "earthy", "label": "Earthy / Musty"},
        {"value": "sulfur", "label": "Sulfur / Rotten Egg"},
        {"value": "chemical", "label": "Chemical"},
        {"value": "sewage", "label": "Sewage"}
      ]
    },
    {
      "id": "photo",
      "type": "photo",
      "label": "Site Photo"
    },
    {
      "id": "notes",
      "type": "textarea",
      "label": "Field Notes"
    }
  ]
}