publisher period x document x sheet/archive member x source row x collected revision
day publication publication cadence
Evidence
Mixed evidence
Multiple evidence types kept distinct in the contract
Time basis
Date-labelled records
UTC · report_date
Overview
Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.
Query contract
The view admits a document only when its completion record and exact mirrored row count agree. Select a report_date, source_url and source_sha256 revision before joining source_member and row_index. Interpret observation times from the source record, never from the collection clock.
Analysis rules
·Decode the report's source headers and units before aggregating. Never sum report_date, row_index, snapshots, revisions, regional totals and components, or forecast vintages.
Interpretation
·report_date identifies the requested publisher period. It is not an observation timestamp. event_time records collection, not source publication or delivery.
·The serving mirror keeps the latest row for each publisher record; older collected revisions may no longer be queryable.
Access
Query from your own tools
Use the guarded HTTP endpoint directly, or connect an MCP client and load the dataset contract with describe_data before calling query_data.
CAISO day-ahead locational marginal prices, one row per interval and location. 1.21B rows, 2016-01 to the next delivery day. Carries price_usd_mwh only. The component columns exist in the raw CAISO day-ahead feed but are entirely NULL in it, so this table carries no decomposition rather than four empty columns. Locations are node (26k — including the TH_ trading hubs such as TH_SP15_GEN-APND; CAISO has no 'hub' kind), interface (the ties), zone (6 aggregates only); location_id joins atg.caiso_locations for the readable name, and kind is carried inline so a hub-only or zone-only question needs no join at all. Every market's day-ahead price table in this catalog has these same column names, so a cross-market price comparison is a UNION rather than a per-ISO rewrite. Revisions are already collapsed — read it plainly.
CAISO real-time locational marginal prices, one row per interval and location. 15.76B rows, 2016-01 to now. Carries price_usd_mwh plus energy_usd_mwh, congestion_usd_mwh, loss_usd_mwh and ghg_usd_mwh — CAISO is the only market here that publishes a greenhouse-gas component. Locations are node (26k — including the TH_ trading hubs such as TH_SP15_GEN-APND; CAISO has no 'hub' kind), interface (the ties), zone (6 aggregates only); location_id joins atg.caiso_locations for the readable name, and kind is carried inline so a hub-only or zone-only question needs no join at all. Every market's real-time price table in this catalog has these same column names, so a cross-market price comparison is a UNION rather than a per-ISO rewrite. Revisions are already collapsed — read it plainly.
Hourly locational marginal prices from CAISO's day-ahead market for pricing nodes across the California ISO footprint. These are cleared market outcomes for future delivery, not forecasts. Comparing the exact same delivery hour and pricing node with five-minute RTD prices shows day-ahead versus real-time divergence. The official source is CAISO OASIS.
CAISO's daily natural-gas price for each of its fuel regions, in $/MMBtu. CAISO posts this as FUEL REGION | GAS INDEX | TRANSPORT | TOTAL, and the value here is that total: a published gas index plus a transport adder, i.e. the delivered cost of gas to that region, not a hub spot assessment. It is the number CAISO uses to reference and floor gas-fired energy bids, so it is the fuel-cost input underneath thermal offer behavior across the West. 201 fuel regions are currently active across 27 electric subregions, reaching well beyond California: Waha and El Paso Permian in West Texas, Opal, Kern River, Cheyenne, CIG and the San Juan points in the Rockies, Malin, Stanfield, Northwest Sumas and Kingsgate in the Pacific Northwest, Alberta AECO in Canada, and the SoCal Citygate and PG&E Citygate burner-tip regions in California. Receipt-point regions such as Waha (FRWHA1-3), El Paso Permian (FREPP1-4), Opal, Malin and Sumas track the underlying published index closely, because their transport adder is small; citygate regions are burner-tip costs and spread widely, so they are not interchangeable with a hub price — on 2026-08-20 the 40 region ids named SoCal Citygate ranged from 4.43 to 8.15 $/MMBtu on the same day. Region ids ending in GHG carry a California carbon-allowance adder on top and are a different quantity again. Negative prices are real and are concentrated in the takeaway-constrained Permian regions: 0.97% of rows are below zero, to a minimum of -10.51 $/MMBtu. Rows are stamped hourly, 24 per region per gas day, but the price is constant across a gas day, and the gas day is the America/Los_Angeles calendar date — it steps at Pacific midnight, so daily rollups must use toDate(event_time, 'America/Los_Angeles'). The current gas day is partial until the next 14:30 UTC pull, though its price is already complete. History runs from 2015-02-01 and is continuous and complete from 2026-02-01 onward; before that date it covers 1,972 of 4,018 days in whole-month blocks (February through April, June, September and November of each year), so a pre-2026 average over an arbitrary window is an average over the months that are present, not over the period requested. Hub attribution is INFERRED from CAISO's region coding, not published: CAISO's monthly fuel-region posting lists region ids with their index, transport and total and no hub names at all, and FRWHA does not appear in it — so 'Waha' here reads the id, corroborated by the price sitting where Waha sits against Henry Hub, rather than by a CAISO mapping. Treat a region as the delivered cost CAISO assigns to it; do not cite it as a hub assessment. This dataset is FUEL-COST CONTEXT, not market settlement data, and is queryable from every active grid scope: a question asked under ERCOT about West Texas gas cost answers from the Waha-region ids here, said as delivered fuel cost. The official source is CAISO OASIS report PRC_FUEL.
