The 2025 New Hampshire Stormwater Manual is now available!
Click to download the NH Stormwater Manual 2025
Municipal guidance for stormwater management standards is available here:
A recording of the 2025 updated NH Stormwater Manual informational session can be found here: recording of informational session. The recording is of a virtual meeting that reviewed changes made to the manual, and highlighting key contributors who helped with this process.
