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State-level market intelligence on how utilities are engaging with data centers and other large load customers

 

LAST UPDATED *

Aug 14, 2025

RECENT UPDATES

15 new tariffs added
7 updated

TOTALS

50 tariffs covering 41M customers

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* Updated monthly

How We Help Energy Professionals

DATA CENTER DEVELOPERS datacenter

Better understand the regulatory landscape nationwide, compare costs, and find the best places to build

UTILITIESplug

Benchmark proposed tariffs against what's already been approved, streamline regulatory approval, and maximize revenue

Law firmslaw

Analyze previous tariff proposals and comments to gain clarity on what's persuaded state regulators

CONSULTANTSconsultants

Help clients better understand the dynamic tariff landscape and recent trends

Data Inputs

Halcyon’s Large Load Tariff Tracker provides regularly updated, comprehensive tariff information, including Utility Data (18 data points), Technical Parameters (operational thresholds), and Market Context (exploration of tariff proposal legislative drivers). We are continuously adding new data and new data fields based on your feedback.

Utility Data

(18 data points)

Field

Description

Utility

Investor Owned utilities over TK MWh served

Tariff Name

Name of plan offered to customers (“Large load rate”)

Parent

Parent company owning the regulated utility

DBA

Tradestyle/does business as names of the utility subsidiary or other business unit

EIA Utility ID

Utility ID used by EIA reporting sources

State

State this tariff is active in

BA Code

Relevant balancing authority

Total Megawatt Hour Sales

Disposition MWh as reported in EIA form 861 in 2023

Utility Customer Count

Number of residential, commercial and industrial customers served in the state by the Utility, per EIA form 861 in 2023

Docket

Identifier used by state Commission

DPP Link

Halcyon AI generated Docket Profile Page 

Docket Name

Name of docket (Petition for approval of “Large load rate”)

Docket Status

Flag for whether this docket active/open/ongoing

Description (From Docket Profile Page)

Halcyon generated summary of the docket proceedings

Docket Start date

First document publication data

Active date

Start date of tariff for customers

Tariff Proposal Date (NEW)

The date on which the utility first proposed the tariff or the amendment to the tariff

Tariff Status

If "Anticipated", active date for tariff is not yet confirmed through Commission approval. If "Confirmed", active date for tariff has been confirmed through Commission approval.

 

Technical Parameters

(operational thresholds)

Column Header

Data Source

Qualifying Demand Threshold for Tariff (MW)

Minimum megawatt demand threshold for single or aggregated loads on a site to be served by the utility; a null response indicates a threshold demand has yet to be proposed, or is not relevant to the tariff.

Voltage Threshold (kV)

Minimum kilovolt interconnection on a site to be served by the utility; a null response indicates the tariff does not require primary or transmission interconnection voltage.

MW Threshold for Crypto and/or Mobile Applications

Megawatt threshold specified for crypto and/or mobile applications; a null response indicates a threshold demand has yet to be proposed, or is not relevant to the tariff.

Minimum Demand Threshold / Load Factor

% of maximum load that the facilities has to maintain (if specified).

Long Term Contract Years

Where specified by tariff, the minimum number of years a large load service contract must be committed to.

Ramp Period

Where specified by tariff, the maximum number of years from the time a large load service begins to receive a minimum service level to the time it must bring its 100% demand online.

Market Context

(exploration of tariff proposal legislative drivers)

Column Header

Data Source

Long Term Contract Requirements

Duration of contract in years, with additional commentary where tariff provides specific guidance.

Rules on Renewals and Amendments

Any rules specified in the tariff around renewals or amendments to the contract.

Minimum Monthly Demand Payments

Minimum payments associated with capacity demand (if required).

Exit Fees

Payments required from a developer to a utility if a datacenter does not meet its contractual obligations.

Collateral Requirements

Posting requirements for any collateral, credit, or securitization described in proposed/enacted tariff.

Riders

Any listed riders relevant to the tariff.

Pre-Existing Tariffs

Any relevant tariffs that a large load would receive service under prior to this proposed tariff becoming effective.

Legislation

Any legislation which appears to drive the proposal of the tariff.

Load Flexibility

A description of any unique requirements of large loads to respond to curtailment through this tariff, if applicable.

Onsite Generation

Any mention of requirement for, preferential treatment for, or unique rules around onsite generation other than emergency back-up generation.

Power Factor

Any rules proposed/enacted for a minimum power factor maintenance requirement, or additional charges for power factor deviations.

Proposed Timeline

The timeline of events proposed by the utility to see a decision on the tariff.

Commenting Organizations

Number of distinct organizations that submitted a comment on the tariff docket.

Intervenors

Number of distinct intervenors that formally intervened in the tariff docket.

Data Preview

Showing three (3) of 50 Large Load Tariffs. Updated monthly.

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Other Data Products

UPDATED - August 19 2025

Gas Power Plant Tracker

146 Plants 72GW Capacity

NEW - July 15 2025

FERC AD25-7-000
Comment Analysis

68 Organization comments 128 Submitters