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EPA Portfolio Manager - Long Island NY

National Grid supports the EPA’s Portfolio Manager tool for Long Island NY properties as part of a larger effort to promote energy efficiency and identify improvement opportunities for our customers. Portfolio Manager provides benchmarks to help customers assess the energy performance of their building(s), and encourage action to make the building(s) more efficient in a sustainable way. To accomplish this, National Grid must disclose the aggregated energy consumption data for your premises.

Please follow the steps below:

Step 1: Start the aggregate data upload process, you must visit the EPA Portfolio Manager site to register your property and complete the SHARE PROPERTY procedure. (If you haven't done so already.)
Step 2: Once you have completed the property share procedure with the EPA portfolio manager, select EPA Portfolio Manager Online Form link to complete the online register process with National Grid.

Building owners that have already received their prior aggregated usage data and are requesting for additional two (2) years of usage information.

After completing  EPA Portfolio Manager Online Form using the steps and link outlined above, fill out the Additional historical usage data upload online form to receive two(2) additional years of prior aggregate usage information.

This additional data will take up to 7 business days to get uploaded into your portfolio manager account.

Note: Building owners that completed “EPA Portfolio Manager Online Form” section will receive 2019 aggregate usage data, and the Additional historical usage data upload online form will provide building owners with 2018 and 2017 aggregate usage data.

National Grid has implemented a quarterly aggregate data upload process that will continue to provide customers with quarterly building usage information for up to four (4) years, as long as building owners maintain their EPA Portfolio Manager web share link as active.  Deactivating EPA portfolio manager property share link will disable the upload process.

If you would like historical data, please contact to request your usage information be uploaded to your EPA portfolio manager account. In most cases, National Grid can provide up to three (3) years of historical energy usage on active accounts.

For more information on the process of uploading whole building aggregate data to Portfolio Manager, see our User Guide (PDF).

If you have any questions about the submission process, email National Grid at or call (855) 563-7448, 8:00 am to 5:00 pm EST Monday through Friday.