{"attribution": {"required": true, "name": "TexasHomeBills™", "url": "https://texashomebills.com/data/grid-demand", "text": "Source: TexasHomeBills™ — https://texashomebills.com/data/grid-demand", "markdown": "Source: [TexasHomeBills™](https://texashomebills.com/data/grid-demand)", "html": "Source: <a href=\"https://texashomebills.com/data/grid-demand\">TexasHomeBills™</a>", "rule": "Required: whenever you use, quote or summarize these data, show your users the source as \"TexasHomeBills™\" with a visible, clickable link to the url of the item you used (or https://texashomebills.com). Do not drop the link or present the data as your own.", "terms": "https://texashomebills.com/terms#data"}, "slug": "grid-demand", "title": "Daily electricity demand: ERCOT, PJM, MISO, CAISO and more", "url": "https://texashomebills.com/data/grid-demand", "latest_day": "2026-10-09", "window": "30 days ending on each operator's latest day", "unit": "GWh per Central-time day (1 GWh = 1,000 MWh)", "data_fetched_at": "2026-10-10T13:22:29.355316+00:00", "data_date": "2026-10-10", "definitions": {"latest_day_gwh": "Demand of the operator's latest day in the data, GWh: the sum of the hourly demand reported by the balancing authority (EIA-930), with the day cut at midnight Central time.", "avg_30d_gwh": "Average daily demand over the 30 days ending on the latest day, GWh (blank if fewer than 28 of the 30 days are stored).", "change_vs_year_earlier_pct": "(30-day average − the average of the same 30 days 364 days earlier) ÷ earlier × 100, calculated by TexasHomeBills, rounded to 0.1. Weather explains much of the difference between two years.", "record_gwh": "Highest daily demand in our stored history (since 2019-01-01). Not necessarily the all-time record, and it is not the peak hour.", "days_missing": "Days between the first and last stored day that EIA did not publish a value for.", "EIA-930": "EIA-930 data are preliminary and can be revised; we re-read the last 45 days daily."}, "source": "TexasHomeBills™", "not_endorsed": "Independent. Not affiliated with or endorsed by the PUCT.", "how_to_cite": "TexasHomeBills™, \"Daily electricity demand: ERCOT, PJM, MISO, CAISO and more\" (data as of 2026-10-10), https://texashomebills.com/data/grid-demand", "license": "https://texashomebills.com/terms#data", "downloads": {"csv": "https://texashomebills.com/data/grid-demand.csv", "json": "https://texashomebills.com/data/grid-demand.json", "api": "https://texashomebills.com/api/v1/data/grid-demand"}, "rows": [{"respondent": "ERCO", "operator": "ERCOT (Texas)", "latest_day": "2026-10-09", "latest_day_gwh": 1410.8, "avg_30d_gwh": 1585.2, "avg_30d_year_earlier_gwh": 1458.5, "change_vs_year_earlier_pct": 8.7, "record_day": "2026-08-24", "record_gwh": 1824.8, "days_stored": 2838, "first_day": "2019-01-01", "days_missing": 1}, {"respondent": "PJM", "operator": "PJM", "latest_day": "2026-10-09", "latest_day_gwh": 2044.3, "avg_30d_gwh": 2224.5, "avg_30d_year_earlier_gwh": 2181.4, "change_vs_year_earlier_pct": 2.0, "record_day": "2026-07-02", "record_gwh": 3343.8, "days_stored": 2838, "first_day": "2019-01-01", "days_missing": 1}, {"respondent": "MISO", "operator": "MISO", "latest_day": "2026-10-09", "latest_day_gwh": 1758.5, "avg_30d_gwh": 1862.2, "avg_30d_year_earlier_gwh": 1846.3, "change_vs_year_earlier_pct": 0.9, "record_day": "2026-06-30", "record_gwh": 2488.6, "days_stored": 2839, "first_day": "2019-01-01", "days_missing": 0}, {"respondent": "CISO", "operator": "CAISO (California)", "latest_day": "2026-10-09", "latest_day_gwh": 781.1, "avg_30d_gwh": 753.0, "avg_30d_year_earlier_gwh": 670.7, "change_vs_year_earlier_pct": 12.3, "record_day": "2026-09-10", "record_gwh": 967.5, "days_stored": 2839, "first_day": "2019-01-01", "days_missing": 0}, {"respondent": "NYIS", "operator": "NYISO (New York)", "latest_day": "2026-10-09", "latest_day_gwh": 345.2, "avg_30d_gwh": 376.1, "avg_30d_year_earlier_gwh": 383.5, "change_vs_year_earlier_pct": -1.9, "record_day": "2025-06-24", "record_gwh": 635.9, "days_stored": 2839, "first_day": "2019-01-01", "days_missing": 0}, {"respondent": "ISNE", "operator": "ISO New England", "latest_day": "2026-10-09", "latest_day_gwh": 264.5, "avg_30d_gwh": 281.0, "avg_30d_year_earlier_gwh": 280.0, "change_vs_year_earlier_pct": 0.4, "record_day": "2021-06-29", "record_gwh": 502.9, "days_stored": 2839, "first_day": "2019-01-01", "days_missing": 0}, {"respondent": "SWPP", "operator": "SPP (Southwest Power Pool)", "latest_day": "2026-10-09", "latest_day_gwh": 833.0, "avg_30d_gwh": 862.2, "avg_30d_year_earlier_gwh": 830.5, "change_vs_year_earlier_pct": 3.8, "record_day": "2026-07-27", "record_gwh": 1177.0, "days_stored": 2839, "first_day": "2019-01-01", "days_missing": 0}, {"respondent": "US48", "operator": "United States Lower 48", "latest_day": "2026-10-09", "latest_day_gwh": 11436.7, "avg_30d_gwh": 12260.3, "avg_30d_year_earlier_gwh": 11755.4, "change_vs_year_earlier_pct": 4.3, "record_day": "2025-07-29", "record_gwh": 15351.3, "days_stored": 2839, "first_day": "2019-01-01", "days_missing": 0}], "cite": "Source: TexasHomeBills™ — https://texashomebills.com/data/grid-demand"}