RTPD LMP (15-minute)

Locational marginal prices from CAISO's real-time pre-dispatch market, published at 15-minute resolution for pricing nodes across the California ISO footprint.

Prices data CAISO market

Query with the agent

Native record

pricing node x 15-minute RTPD interval

15-minute (RTPD) publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Interval-start records

UTC · event_time

Overview

Each row carries total LMP and its energy, congestion, and loss components for one node and interval. A non-null component supports attribution of that portion of the node price, but neither total LMP nor the component alone names the binding facility or proves a topology relationship; direct constraint attribution is still required. The official source is CAISO OASIS.

Query contract

Preserve one canonical row per (event_time, node) before aggregating.

Analysis rules

Group only after preserving the declared grain: event_time, node.

Related analysis

day-ahead versus real-time nodal price · Use query_data on each dataset with the same pricing node, ISO-local day, event_time bucket='hour', and ascending order. Average RTPD values to that delivery hour; the returned timestamp axes then align for compute.

Interpretation

A non-null congestion component supports congestion attribution; a null component does not support a causal claim.
Price shape alone cannot identify a binding facility.

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 MCP API reference

HTTP endpoint

POST /api/v1/datasets/caiso_lmp_rtpd_15m/query

Schema10

Column

Type

event_timeDateTime64(6, 'UTC')

market_runLowCardinality(String)

nodeLowCardinality(String)

pnode_idNullable(String)

lmp_totalNullable(Float64)

energy_componentNullable(Float64)

congestion_componentNullable(Float64)

loss_componentNullable(Float64)

ingested_atDateTime64(6, 'UTC')

ghg_componentNullable(Float64)

Sample data

event_time	market_run	node	pnode_id	lmp_total	energy_component	congestion_component	loss_component	ingested_at	ghg_component
2026-09-30 03:30:00.000000	rtpd_15min	YU_6_TGEN-APND	YU_6_TGEN-APND	18.95908	31.56609	-13.20361	0.5966	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	YALE_7_UNITS-APND	YALE_7_UNITS-APND	30.13126	31.57089	0	-1.43963	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WSH_1_WESTSIDEHYD-APND	WSH_1_WESTSIDEHYD-APND	38.96175	39.18738	0	-0.22563	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WRW_2_BLUERDG_PLANT-APND	WRW_2_BLUERDG_PLANT-APND	30.05258	31.57089	0	-1.51831	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WP_2_WPCC5MSG-APND	WP_2_WPCC5MSG-APND	26.85293	31.56609	-4.27706	-0.4361	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WP_2_WPCC4-APND	WP_2_WPCC4-APND	26.93549	31.56609	-4.27706	-0.35354	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WOODLAND_7_WGSUNIT3-APND	WOODLAND_7_WGSUNIT3-APND	38.27339	31.56849	0.74089	0.01501	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WOODLAND_7_WGSUNIT2-APND	WOODLAND_7_WGSUNIT2-APND	38.26964	31.56849	0.74089	0.01126	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WOLVERIN_7_UNITS-APND	WOLVERIN_7_UNITS-APND	30.82233	31.56849	-1.16286	0.4167	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WNDSTR_2_WIND-APND	WNDSTR_2_WIND-APND	36.31962	31.56729	1.28503	-2.4817	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WISHON_6_UNITS-APND	WISHON_6_UNITS-APND	40.75373	31.56729	0.80263	2.43481	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WH2_2_CHEM_WE4_PLANT-APND	WH2_2_CHEM_WE4_PLANT-APND	31.65061	31.57089	0	0.07972	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WFD_2_ENERGIZE_PLANT-APND	WFD_2_ENERGIZE_PLANT-APND	29.97052	31.57089	0	-1.60037	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WESTROCK_1_BKS-APND	WESTROCK_1_BKS-APND	31.34358	31.57089	0	-0.22731	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WCW_2_WHITECRK_PLANT-APND	WCW_2_WHITECRK_PLANT-APND	29.64813	31.57089	0	-1.92276	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WARNE_2_UNIT-APND	WARNE_2_UNIT-APND	36.87626	31.56729	0.86438	-1.5044	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WAPAMEEA3_ON_ASR-APND	WAPAMEEA3_ON_ASR-APND	36.98022	31.56849	0.64828	-1.18555	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WAPAMEEA3_OFF_ASR-APND	WAPAMEEA3_OFF_ASR-APND	37.28786	31.56849	0.64828	-0.87791	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WAPAMEEA2_ON_ASR-APND	WAPAMEEA2_ON_ASR-APND	36.98022	31.56849	0.64828	-1.18555	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WAPAMEEA2_OFF_ASR-APND	WAPAMEEA2_OFF_ASR-APND	37.28786	31.56849	0.64828	-0.87791	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WAPAMEEA1_ON_ASR-APND	WAPAMEEA1_ON_ASR-APND	36.98022	31.56849	0.64828	-1.18555	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WAPAMEEA1_OFF_ASR-APND	WAPAMEEA1_OFF_ASR-APND	37.28786	31.56849	0.64828	-0.87791	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WALNUTEC_1_UNITS-APND	WALNUTEC_1_UNITS-APND	37.28453	31.56849	0.74089	-0.97385	2026-09-30 03:08:28.955540	5.949
2026-09-30 03:30:00.000000	rtpd_15min	WALC_WWNG500SRP_WALC-APND	WALC_WWNG500SRP_WALC-APND	31.56609	31.56609	0	0	2026-09-30 03:08:28.955540	0
2026-09-30 03:30:00.000000	rtpd_15min	WALC_WWNG230SRP_WALC-APND	WALC_WWNG230SRP_WALC-APND	31.56609	31.56609	0	0	2026-09-30 03:08:28.955540	0

Coverage

Showing the last 704 days of a 3,926-day history (Jan 1, 2016 → Sep 30, 2026). This dataset holds 5.57B rows — too many to count day by day on every visit — so the calendar and the figures below cover the window from Oct 27, 2024.

100.0% complete0 gap days704 days with data

Show coverage history

Coverage: 100.0%Days with data: 704Gaps: 0

2026

2025

2024

gaplessmore

Related prices data

Related prices data
Dataset	Description
CAISO Day-Ahead PricesCAISO · hourly (IFM)	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 PricesCAISO · 5-minute (RTD)	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.
Day-Ahead LMPCAISO · hourly (DAM)	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.
Fuel Region Gas PricesCAISO · Daily (gas day)	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.