{
  "query": {
    "country": "CA",
    "region": "Ontario",
    "fuel": "diesel",
    "town": "Windsor"
  },
  "status": "ok",
  "price": {
    "currency": "CAD",
    "unit": "per litre",
    "value": 2.6,
    "measure": "average",
    "median": null,
    "typical_low": null,
    "typical_high": null,
    "min": null,
    "max": null
  },
  "sample_size": null,
  "period": {
    "from": "2026-10-19",
    "to": "2026-10-19"
  },
  "confidence": "high",
  "price_type": "posted_pump_price",
  "statistic": {
    "measure": "average",
    "reference_period": "week of 2026-10-19"
  },
  "as_of": "2026-10-23T12:11:52.827Z",
  "source": {
    "id": "ca-on-fuel",
    "name": "Ontario Fuels Price Survey (fueltypesall.csv)",
    "publisher": "Government of Ontario, Ministry of Energy",
    "licence": "Open Government Licence – Ontario: \"The Information Provider grants you a worldwide, royalty-free, perpetual, non-exclusive licence to use the Information\" including for commercial purposes.",
    "licence_url": "https://www.ontario.ca/page/open-government-licence-ontario",
    "attribution": "Contains information licensed under the Open Government Licence – Ontario. Source: Government of Ontario, Ministry of Energy, Fuels Price Survey. Prices are passed on as published (converted from cents to dollars per litre); the changes on the week and the year are own calculations by ProofPrice.",
    "url": "https://data.ontario.ca/dataset/fuels-price-survey-information"
  },
  "method": "Ontario fuel: the Ontario Ministry of Energy's weekly Fuels Price Survey, the average retail price per litre in the market asked about (or the Ontario average), shown in Canadian dollars, for the newest week that market has a price, with the change on the week before and on the same week a year earlier. A posted pump price average for a market, not what each driver paid; no range or sample size is published.",
  "method_url": "https://proofprice.com/method",
  "summary": "The average pump price of diesel in Windsor, Ontario was $2.600 CAD per litre in the survey week of 2026-10-19, up 2% on the week before ($2.548 on 2026-10-13) and up 100.2% on a year earlier ($1.299 on 2025-10-20). Published by Government of Ontario, Ministry of Energy for week of 2026-10-19.",
  "notice": "Information, not a valuation or offer. Ranges describe past recorded prices.",
  "extra": {
    "survey_week": "2026-10-19",
    "market": "Windsor",
    "change_on_week": {
      "from": "2026-10-13",
      "value": 2.548,
      "absolute": 0.052,
      "percent": 2
    },
    "change_on_year": {
      "from": "2025-10-20",
      "value": 1.299,
      "absolute": 1.301,
      "percent": 100.2
    },
    "ontario_average_cad_per_litre": 2.616,
    "other_fuels_same_market": {
      "petrol95_cad_per_litre": 1.759,
      "petrol98_cad_per_litre": 2.058,
      "propane_cad_per_litre": 1.009,
      "methane_cad_per_litre": 0.884
    }
  },
  "answer_id": "ans_5df5b5089a0c8e90d759",
  "method_version": "1",
  "retrieved_at": "2026-10-23T12:11:52.827Z",
  "evidence": {
    "type": "posted_pump_price",
    "label": "Posted shelf or pump price",
    "meaning": "The price a seller displays (for example at a pump or on a shelf): it is what is asked at the time, not a record of what each customer paid."
  },
  "reliability": "official_median_no_count",
  "data_as_of": "2026-10-19",
  "data_age_days": 4,
  "suggestions": [
    "This is one published figure (an average, median, index or listed price) with no record count: use it as a reference point, not as a range of what individuals paid.",
    "For a decision on a specific job or purchase, ask for an itemised quote.",
    "This is a posted price, not what each customer paid."
  ]
}