About the Hempstead Intersection Street former Manufactured Gas Plant Site

Gas used for cooking, lighting, heating and commercial purposes was manufactured at the Hempstead Intersection Street Manufactured Gas Plant from early 1900’s to mid 1950’s. This plant used coal and petroleum products to create a flammable gas which was piped into the surrounding communities. The production and storage facilities were decommissioned and demolished in the early 1950’s. The by-products of gas production and storage that resulted from site operations are now being addressed through Interim Remedial measures and a Remedial Action Plan approved and being implemented by National Grid under the oversight of the New York State Department of Environmental Conservation. The site is owned by National Grid, which is responsible for the investigation and remediation of the site because it was operated by a predecessor company at the time the contamination occurred.

This website provides information on Hempstead Intersection Street former MGP Site, the remediation projects and opportunities for public participation. National Grid is committed to the protection and enhancement of the environment, always seeking ways to minimize the environmental impacts of our past, present and future activities. We hope this website, a part of our public participation and outreach efforts, is helpful and informative. If you need additional information or have suggestions to make our website better, please contact the individuals listed under Contacts.


National Grid will provide updates about work related to the remediation of the Hempstead Intersection Street former MGP Site as the work progresses. The Updates generally describe work recently completed and upcoming work, especially work that may affect normal community activities. A discussion of the work that began in April 2010 is provided immediately below. Archives of reports of this work, as well as of the Interim Remedial Measure completed in December 2008, will be found in the Key Documents section of this website.

Hotline Number Update

National Grid is committed to keeping the community informed of any activities at the site. We will continue to post updates on this project website. Please note that the National Grid Hotline for the Hempstead Intersection Street former Manufactured Gas Plant Site has changed. Any questions pertaining to the site can be posed by calling the new number at (631) 348-6250.

Hempstead Intersection Street Former MGP Site -
Remedial Progress

January 2017

National Grid completed the major remedial construction work for the Site and the Final Engineering Report for the remediation work has been approved by the NYSDEC. National Grid has continued to perform the routine Operations, Maintenance and Monitoring for the Groundwater Oxygenation treatment systems, and the monitoring wells in accordance with NYSDEC requirements.

pdf Hempstead 2nd Quarter 2016 Groundwater Sampling Report

pdf Hempstead 1st Quarter 2016 Groundwater Sampling Report