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Zonal Load 5m

ISO-NE's published Zonal Load 5m source feed.

Load dataISO-NE market
Query with the agentOpen on map
Native record
ISO-NE publication x nested load zone x five-minute interval
ISO-NE source publication publication cadence
Evidence
Observed market data
Published observations from the named source
In Ask the Grid
Load zones on the ISONE map
Values for the live grid surface

Overview

This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.

Query contract

Select the latest ingested_at revision for one event_time, then expand five_min_estimated_zonal_load once and preserve load_zone_id.

Analysis rules

  • The zone values may be summed once to describe the ISO-NE zonal total; do not mix them with system_load_5m in the same total.

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.

ISO-NE MCP API reference
HTTP endpoint
POST /api/v1/datasets/isone_zonal_load_5m/query

Schema3

Column
Type
event_timeDateTime64(6, 'UTC')
five_min_estimated_zonal_loadNullable(String)
ingested_atDateTime64(6, 'UTC')

Sample data

event_timefive_min_estimated_zonal_loadingested_at
2026-09-28 13:00:25.424216[{"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1370.43, "estimated_btm_pv_mw": 49}, {"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1252.037, "estimated_btm_pv_mw": 11}, {"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 604.875, "estimated_btm_pv_mw": 40}, {"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2973.553, "estimated_btm_pv_mw": 71}, {"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 825.393, "estimated_btm_pv_mw": 33}, {"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1520.946, "estimated_btm_pv_mw": 99}, {"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1661.399, "estimated_btm_pv_mw": 78}, {"interval_begin_date": "2026-09-28T08:45:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2760.778, "estimated_btm_pv_mw": 30}]2026-09-28 13:00:25.835521
2026-09-28 12:55:25.221371[{"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1362.17, "estimated_btm_pv_mw": 47}, {"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1244.574, "estimated_btm_pv_mw": 10}, {"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 610.363, "estimated_btm_pv_mw": 38}, {"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2947.148, "estimated_btm_pv_mw": 67}, {"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 825.998, "estimated_btm_pv_mw": 33}, {"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1528.666, "estimated_btm_pv_mw": 90}, {"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1652.753, "estimated_btm_pv_mw": 72}, {"interval_begin_date": "2026-09-28T08:40:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2744.157, "estimated_btm_pv_mw": 29}]2026-09-28 12:55:25.603096
2026-09-28 12:50:24.901882[{"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1358.608, "estimated_btm_pv_mw": 45}, {"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1245.174, "estimated_btm_pv_mw": 10}, {"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 609.059, "estimated_btm_pv_mw": 35}, {"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2983.225, "estimated_btm_pv_mw": 62}, {"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 840.205, "estimated_btm_pv_mw": 32}, {"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1532.777, "estimated_btm_pv_mw": 81}, {"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1656.666, "estimated_btm_pv_mw": 67}, {"interval_begin_date": "2026-09-28T08:35:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2749.506, "estimated_btm_pv_mw": 26}]2026-09-28 12:50:25.196656
2026-09-28 12:45:25.444862[{"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1362.609, "estimated_btm_pv_mw": 42}, {"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1240.877, "estimated_btm_pv_mw": 9}, {"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 605.175, "estimated_btm_pv_mw": 34}, {"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2938.295, "estimated_btm_pv_mw": 57}, {"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 836.666, "estimated_btm_pv_mw": 27}, {"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1522.126, "estimated_btm_pv_mw": 74}, {"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1644.479, "estimated_btm_pv_mw": 63}, {"interval_begin_date": "2026-09-28T08:30:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2716.84, "estimated_btm_pv_mw": 24}]2026-09-28 12:45:25.802330
2026-09-28 12:40:24.975733[{"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1360.961, "estimated_btm_pv_mw": 39}, {"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1237.223, "estimated_btm_pv_mw": 9}, {"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 609.379, "estimated_btm_pv_mw": 31}, {"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2963.54, "estimated_btm_pv_mw": 51}, {"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 837.211, "estimated_btm_pv_mw": 24}, {"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1526.369, "estimated_btm_pv_mw": 67}, {"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1650.376, "estimated_btm_pv_mw": 55}, {"interval_begin_date": "2026-09-28T08:25:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2717.19, "estimated_btm_pv_mw": 23}]2026-09-28 12:40:25.289986
2026-09-28 12:35:25.444559[{"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1354.74, "estimated_btm_pv_mw": 35}, {"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1238.19, "estimated_btm_pv_mw": 8}, {"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 610.341, "estimated_btm_pv_mw": 29}, {"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2952.014, "estimated_btm_pv_mw": 48}, {"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 829.478, "estimated_btm_pv_mw": 21}, {"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1528.247, "estimated_btm_pv_mw": 60}, {"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1655.852, "estimated_btm_pv_mw": 49}, {"interval_begin_date": "2026-09-28T08:20:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2720.212, "estimated_btm_pv_mw": 21}]2026-09-28 12:35:25.796563
2026-09-28 12:30:25.758080[{"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1349.592, "estimated_btm_pv_mw": 31}, {"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1236.758, "estimated_btm_pv_mw": 7}, {"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 612.03, "estimated_btm_pv_mw": 27}, {"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2935.699, "estimated_btm_pv_mw": 44}, {"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 839.458, "estimated_btm_pv_mw": 19}, {"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1528.259, "estimated_btm_pv_mw": 53}, {"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1654.885, "estimated_btm_pv_mw": 43}, {"interval_begin_date": "2026-09-28T08:15:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2706.965, "estimated_btm_pv_mw": 19}]2026-09-28 12:30:26.174195
2026-09-28 12:25:25.022163[{"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1358.599, "estimated_btm_pv_mw": 27}, {"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1235.295, "estimated_btm_pv_mw": 7}, {"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 610.248, "estimated_btm_pv_mw": 25}, {"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2927.994, "estimated_btm_pv_mw": 39}, {"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 838.651, "estimated_btm_pv_mw": 17}, {"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1528.436, "estimated_btm_pv_mw": 46}, {"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1655.482, "estimated_btm_pv_mw": 39}, {"interval_begin_date": "2026-09-28T08:10:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2707.609, "estimated_btm_pv_mw": 16}]2026-09-28 12:25:25.504057
2026-09-28 12:20:25.348852[{"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4001, "load_zone_name": ".Z.MAINE", "estimated_load_mw": 1357.781, "estimated_btm_pv_mw": 23}, {"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4002, "load_zone_name": ".Z.NEWHAMPSHIRE", "estimated_load_mw": 1232.649, "estimated_btm_pv_mw": 6}, {"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4003, "load_zone_name": ".Z.VERMONT", "estimated_load_mw": 611.756, "estimated_btm_pv_mw": 22}, {"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4004, "load_zone_name": ".Z.CONNECTICUT", "estimated_load_mw": 2915.428, "estimated_btm_pv_mw": 33}, {"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4005, "load_zone_name": ".Z.RHODEISLAND", "estimated_load_mw": 837.58, "estimated_btm_pv_mw": 14}, {"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4006, "load_zone_name": ".Z.SEMASS", "estimated_load_mw": 1530.613, "estimated_btm_pv_mw": 40}, {"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4007, "load_zone_name": ".Z.WCMASS", "estimated_load_mw": 1653.009, "estimated_btm_pv_mw": 36}, {"interval_begin_date": "2026-09-28T08:05:00.000-04:00", "load_zone_id": 4008, "load_zone_name": ".Z.NEMASSBOST", "estimated_load_mw": 2702.877, "estimated_btm_pv_mw": 14}]2026-09-28 12:20:25.706071
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Coverage

100.0% complete0 gap days131 days with data
Show coverage history
Coverage: 100.0%Days with data: 131Gaps: 0
2026
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