Written by: Paul Foster, Founder, CEO, OnePlan
Key Takeaways
- A community market power distribution map helps planners see grid infrastructure, hosting capacity, regulatory structures, and local clean energy projects for event power planning.
- Four primary map types exist: grid infrastructure maps show physical assets, hosting capacity maps reveal DER limits, energy democracy maps outline market control, and community clean energy maps highlight local projects.
- Event organizers use these maps to assess power availability, select grid-friendly sites, find the right utility contacts, and coordinate early with local authorities.
- Common pitfalls include using outdated data, confusing map purposes, overlooking local regulations, and separating power planning from accurate site layouts.
- OnePlan lets you import power maps directly into your event site plan for accurate, to-scale infrastructure placement. Book a 15-minute demo to see how it streamlines approvals and safety documentation.
What a Community Market Power Distribution Map Shows You
The term “community market power distribution map” covers several distinct tools that people often group together. Each map type answers a different question about your local energy landscape. Over two-thirds of the country's electric demand and supply is coordinated by regional transmission organizations (RTOs), yet many community planners have never seen a map of who actually controls their grid. You get the most value from these resources when you match the right map type to your specific planning question.
Grid Infrastructure Maps: The Physical Power Network
Grid infrastructure maps show the physical backbone of the electricity system, including high-voltage transmission lines, substations, and generation plants. They explain where power comes from and how it reaches your community.
Key tools to explore include:
- Open Infrastructure Map: A community-driven global map that visualizes low-voltage and high-voltage power lines, substations, and transformers.
- Electricity Maps: A real-time data platform that maps zone-by-zone commercial power market data, including grid consumption, production mix, and carbon intensity.
- EIA Hourly Electric Grid Monitor: A tool with up-to-the-hour data on electricity demand and generation by source for 64 balancing authorities across the U.S. grid, plus hourly CO₂ emissions estimates.
- Utility-owned GIS portals: Many utilities publish interactive maps of their service territory, including outage status and infrastructure locations.
For event planners, grid infrastructure maps support early checks on power availability for stages, lighting, and food vendor hookups. They also help you locate nearby substations and understand potential outage risks in the event area. GIS-based grid analysis places electrical relationships into geographic context, so you can see how a large temporary load at an event site might interact with local distribution assets before event day.
Hosting Capacity Maps: Siting Solar and Event Power
Hosting capacity maps show how much distributed energy, such as solar panels or battery storage, can be safely added to a specific circuit without grid upgrades. They explain how much solar your community can add in a location and where you can safely draw temporary power.
Where to Find Hosting Capacity Maps
- Check the DOE Atlas. As of May 2024, 58 utilities and state agencies have published hosting capacity maps across 26 states, Washington, D.C., and Puerto Rico, all listed in one centralized directory.
- Visit your local utility's website. Major utilities including Pacific Gas & Electric, Southern California Edison, Xcel Energy, National Grid, Con Edison, Duke Energy, and Dominion Energy publish these maps. Some utilities, like ComEd in Illinois, update their distribution circuit hosting capacity maps monthly, while others update annually or quarterly.
- Contact the utility directly. Even without a public map, utilities may still consult with customers on their distribution network's future capacity potential.
These maps guide community solar projects and event power planning. PSE&G in New Jersey offers a hosting capacity map specifically for EV charging, which helps developers find grid-friendly locations and avoid lengthy, expensive upgrades. The same logic applies to temporary event power infrastructure. Some utilities, including Pacific Gas & Electric and San Diego Gas & Electric, require an account to access their maps.
Energy Democracy and Policy Maps: Market Control and Rules
Energy democracy maps show the regulatory and market structures that govern energy distribution. They explain who makes decisions about your community's energy system.
- FERC Electric Power Markets Map: The Federal Energy Regulatory Commission maps wholesale regional transmission organizations (RTOs) and independent system operators (ISOs). The seven major U.S. wholesale market regions include four RTOs, Southwest Power Pool (SPP), Midcontinent ISO (MISO), PJM Interconnection, and ISO New England, and three ISOs, CAISO, ERCOT, and NYISO.
- ILSR Community Power Map: The Institute for Local Self-Reliance hosts an interactive map that grades states on policies supporting local clean energy action, net metering, and community choice.
- EIA Electricity Data: The U.S. Energy Information Administration offers the Electricity Data Browser, an interactive tool with charts and maps covering generation, consumption, retail sales, and electricity prices.
State Examples of Community Power Policies
California: The California ISO (CAISO) manages most of the state's grid. Community Choice Aggregators (CCAs), authorized under Assembly Bill 117, allow local governments to procure power for residents while transmission and distribution service stays with the existing utility. In 2022, about 5.7 million customers procured approximately 14.6 billion kWh of electricity through CCA programs across 10 states. At its February 2026 Voting Meeting, the CPUC approved an Integrated Resource Planning decision that requires electricity providers to procure 6,000 MW of new clean energy and storage by 2032.
Texas: ERCOT operates the state power grid and oversees the flow of electricity to over 27 million customers, but does not directly own facilities that deliver power. Delivery utilities like Oncor and CenterPoint own the physical infrastructure. In Texas's deregulated market, the Retail Electric Provider sells electricity and manages billing, while the Transmission and Distribution Service Provider owns and maintains poles, wires, substations, and smart meters. Event planners in Texas need to engage the correct TDSP, not only a retailer, when assessing site power availability.
Requirements vary significantly by state. Always check local regulations and consult your local utility and relevant authorities before making planning decisions based on any map.
Community Clean Energy Maps: Local Solar and Shared Projects
Community clean energy maps highlight local solar projects, community solar programs, and energy aggregation initiatives. As of the DOE's most recent data, at least one community solar project exists in 44 states and localities including the District of Columbia, and 24 of those have passed enabling legislation. U.S. community solar crossed 10 GWdc of cumulative installed capacity by the end of 2025.
Event organizers can use these maps to find opportunities to partner with local clean energy programs for event power. They also help you place temporary solar infrastructure in areas where the grid can support it without costly upgrades.
Using Power Distribution Maps in Community Event Planning
Power distribution data becomes most valuable when you apply it directly to your event site plan. A clear process turns abstract grid information into safer, more resilient layouts.
The core steps are:
- Assess power availability and grid capacity. Use grid infrastructure maps to see what exists at your site. Identify the nearest substations and review potential outage risks before you commit to a venue or layout.
- Identify grid-friendly locations for event power. Use hosting capacity maps to find circuits that can support temporary loads such as generators, lighting rigs, and food vendor hookups without triggering expensive upgrade requirements.
- Clarify who to contact. Energy democracy maps show which utility, RTO, or CCA governs your area. This helps you engage the right organization early in the planning process instead of discovering the wrong contact on event day.
- Coordinate with local utilities and authorities early. Share your power needs with utilities well in advance. Reliable event power planning requires verifying mains voltages and breaker access at the venue before adding loads, and confirming compliance with local electrical codes and the National Electrical Code (NEC).
Applying Power Maps in OnePlan
Once you have the relevant power distribution map for your site, OnePlan gives you a visual, to-scale way to apply it to your event site plan. The workflow is straightforward.
- Obtain the relevant power distribution map from your utility or the DOE Atlas.
- Convert the map to a .png file.
- Import the file into OnePlan and scale it onto the satellite map of your event site.
- Plan your event infrastructure on top, including stages, generators, food vendors, and crowd areas, all to scale with accurate measurements.
OnePlan's collaborative platform lets you share your plan with utilities, local government departments, and other stakeholders on a single live plan. This approach makes approvals smoother and safety documentation easier to defend. Eagle Mountain City, for example, cut planning time by 70%, from 8–10 hours down to a few hours per event, and reported a 5x return on investment by moving to a single, to-scale collaborative plan instead of creating separate maps for fire, police, and facilities departments.
Common Pitfalls When Using Power Maps
Several recurring mistakes reduce the value of power distribution maps for event planners. You can avoid them with a few simple checks.
- Using outdated maps. Grid data changes frequently. Some utilities still update hosting capacity maps only annually, while others update monthly or more often. Always confirm that you are working from the most current version before making infrastructure decisions.
- Misunderstanding map types. A hosting capacity map does not explain market structure, and a policy map does not show substation locations. Match each map to the question you need to answer before you act.
- Overlooking local regulations. Permitting and safety requirements vary by state and municipality. Always consult local authorities. The examples in this guide, California and Texas, reflect those states' specific frameworks, and your jurisdiction will differ.
- Waiting too long to coordinate with utilities. Late engagement often reveals power shortfalls during event week. Contact utilities at the earliest planning stage.
- Separating power planning from the site layout. Power distribution data only helps when you apply it to an accurate, to-scale site plan. Importing a hosting capacity map into a tool like OnePlan and planning generator placement, cable runs, and vendor hookups on top of it closes the gap between grid data and ground-level execution.
SoulFest, one of New England's largest music festivals, cut planning time by 85% by moving from a mix of Google Maps and Photoshop to OnePlan. The team built almost the entire event map, including infrastructure placement, within two days.
Frequently Asked Questions
What are power markets, and why do they matter for community event planning?
Power markets are systems for buying and selling electricity at the wholesale level. In the U.S., Regional Transmission Organizations (RTOs) and Independent System Operators (ISOs), including PJM, MISO, CAISO, ERCOT, and NYISO, coordinate the grid and run wholesale electricity markets. About 70% of U.S. electricity consumers are served by an ISO or RTO. For event planners, knowing which market governs your area clarifies who sets rules for grid access, which utility to contact for temporary power needs, and what resilience resources may be available if the grid is stressed during your event.
How do I find hosting capacity maps for my community?
Start with the DOE's U.S. Atlas of Electric Distribution System Hosting Capacity Maps, which aggregates publicly available utility maps in one place. As of May 2024, 58 utilities and state agencies across 26 states, Washington, D.C., and Puerto Rico have published maps there. You can also search your local utility's website directly for “hosting capacity map.” Major utilities including Pacific Gas & Electric, Southern California Edison, Xcel Energy, National Grid, Con Edison, Duke Energy, and Dominion Energy publish these maps, though some require creating an account. If no public map exists, contact your utility directly, because they may still advise on circuit capacity for your site.
What is the difference between a grid infrastructure map and a hosting capacity map?
A grid infrastructure map shows physical assets such as transmission lines, substations, and generation plants. It explains where power comes from and how it moves through the network. A hosting capacity map shows how much additional distributed energy, such as solar or battery storage, can be added to a specific circuit without requiring grid upgrades. Grid maps describe what exists, and hosting capacity maps describe what is possible. For event planning, grid maps help you assess outage risk and locate nearby substations, while hosting capacity maps help you identify where temporary solar or backup power infrastructure can connect without triggering costly upgrade requirements.
How can I use these maps practically for event site planning?
The most practical approach is to use the maps as a base layer for your event site plan. Download or screenshot the relevant map, convert it to a .png file, and import it into OnePlan. From there, you can scale it onto the satellite map of your event site and plan your infrastructure, including generators, cable runs, vendor hookups, and crowd areas, directly on top of it, all to scale. OnePlan's area and perimeter calculator instantly returns the size of any space you outline, and its standing crowd capacity calculator lets you define safe capacity for any crowd zone. This process turns grid data into actionable, defensible site planning that you can share with utilities, local government departments, and other stakeholders on one live plan.
Are these maps free to access?
Most publicly available maps are free. The DOE Atlas, FERC's market maps, the ILSR Community Power Map, and the EIA's Hourly Electric Grid Monitor all require no payment. The Open Infrastructure Map and Electricity Maps also offer free access tiers. Some utility-specific hosting capacity maps, including those from Pacific Gas & Electric, San Diego Gas & Electric, Georgia Power, NV Energy, and PSEG Long Island, require creating a free account. A small number of advanced data platforms charge subscription fees for real-time or granular circuit-level data beyond what utilities publish publicly.
Conclusion: Turn Power Maps into Safer Events
A clear view of your community's power distribution now sits at the core of effective community event and clean energy planning. When you understand the four types of community market power distribution maps, grid infrastructure, hosting capacity, energy democracy and policy, and community clean energy, you can make better decisions, avoid costly surprises, and design more resilient events.
You can close the gap between energy mapping and event site planning with a single workflow. Import your power distribution maps into OnePlan, plan your infrastructure to scale on top of them, and collaborate with every stakeholder, including utilities, local government, and safety teams, on a single live plan. Planners at organizations from Eagle Mountain City to Silverstone already use this approach to turn complex data into safe, well-run events.