Database of Emerging Large Load Tariffs (DELTa) DELTa What is a Large-Load Tariff? Frequently Asked Questions (FAQs) Additional Resources Frequently Asked Questions What is the Database of Emerging Large-Load Tariffs (DELTa)?DELTa is a public resource that aggregates, summarizes, and tracks utility large-load tariffs and illustrative examples of related changes to utility service rules for large-load customers.What types of tariffs are included? We include pending, approved, and effective large-load tariffs and service rules. We also include clean transition tariffs, and large-load terms and conditions in line extension policies and other service rules. DELTa focuses on retail utility large-load tariffs, which require approval by state utility regulators or local utility governance bodies. DELTa also includes limited, notable examples of wholesale utility large-load tariffs, which require approval from the Federal Energy Regulatory Commission. Customer applicability varies by tariff or service rule and may be based on business type (e.g., data center, cryptocurrency mining), monthly load (MW), load factor, or other characteristics. What types of utilities are included?We aim to provide a comprehensive database of U.S. investor-owned utility tariffs for large-load customers. We also include selected tariffs developed by public power, distribution cooperatives, or generation and transmission-only (G&T) utilities.How often is the Database of Emerging Large-Load Tariffs (DELTa) updated?DELTa is a living resource that SEPA and NCCETC update quarterly as new information becomes available. Where do SEPA and NCCETC get the information provided in DELTa?We obtain the information directly from documents published by individual utilities on their websites and/or filed in regulatory dockets before state public utility commissions. SEPA closely monitors industry developments related to load growth, grid modernization, system resilience, and carbon reduction. NCCETC regularly tracks state legislation and regulatory dockets across all 50 U.S. states, DC, and Puerto Rico. It analyzes trends and highlights noteworthy policy developments related to large load customers, distributed generation, grid modernization, electric vehicles, and power decarbonization policy through DSIRE Insight.How can I alert SEPA and NCCETC of new data, missing data, or a possible correction?Please email [email protected] and [email protected]. Are SEPA and NCCETC planning future enhancements to DELTa?Yes! If you have specific suggestions, please email [email protected] and [email protected].How can I find out when DELTa has been updated?We email update notifications to those who have downloaded the public database. Email [email protected] with questions about upcoming updates or to join our mailing list.How should I cite DELTa in a report or filing?DELTa: the Database of Emerging Large-Load Tariffs. (2026). By Smart Electric Power Alliance (SEPA) and North Carolina Clean Energy Technology Center (NCCETC). https://sepapower.org/large-load-tariffs-database/.I’m a reporter or a government official. How can I talk with SEPA or NCCETC about DELTa?Contact [email protected] or [email protected].