Working with partners and stakeholders to protect and restore surface water in New Hampshire.
The NHDES Watershed Assistance Section works with local organizations, statewide nonprofits, municipalities, regional planning commissions, other programs within NHDES, EPA New England, and other state agencies to improve water quality in New Hampshire at the watershed level by implementing the New Hampshire Nonpoint Source Management Program Plan.
At the heart of this plan is the protection and/or restoration of surface waters in New Hampshire enabled by far-reaching collaboration with a diverse portfolio of watershed management stakeholders throughout the state.
Watershed Assistance Documents
- Nonpoint Source Management Plan – The goals of the New Hampshire NPS Program are defined within the New Hampshire NPS Management Program Plan. The plan is updated every 5 years and approved by the U.S. Environmental Protection Agency.
- NH’s Homeowner’s Guide to Stormwater Management – Do-It-Yourself Stormwater Solutions for Your Home - Every single property has the potential to contribute to water pollution. NHDES created a comprehensive guidance document and a hands-on voluntary program to assist New Hampshire home and small business owners in reducing water pollution.
- NH Stormwater Manual – The New Hampshire Stormwater Manual was developed in 2008 as a planning and design tool for the communities, developers, designers and members of regulatory boards, commissions, and agencies involved in stormwater programs in New Hampshire.
- UNH Cooperative Extension Stormwater Resources – The UNH Cooperative Extension offers resources related to stormwater management and reports from NHDES-funded projects. Check out “Protecting Water Resources and Managing Stormwater: A Bird’s Eye View for New Hampshire Communities” and “Model Stormwater Standards for Coastal Watershed Communities.”
- Watershed-based Plans – Required for funding for Clean Water Act Section 319 funds, watershed-based plans work toward water quality goals to either restore impaired waters, or to meet long-term goals for high quality waters. See the EPA "Handbook for Developing Watershed Plans” for more information on the EPA Section 319 funding criteria for watershed–based plans. Contact us for more information
- Watershed Restoration Success Stories – This page features stories about primarily nonpoint source pollution-impaired water bodies, where restoration efforts have led to documented water quality improvements.
Lawn and Landscaping
Voluntary Turf Fertilizer Initiative
The Northeast Voluntary Turf Fertilizer Initiative was a project completed through the partnership of the New England Interstate Water Pollution Control Commission and various stakeholders in 2014.
Landscaping for Water Quality
The UNH Cooperative Extension provides resources including various articles about landscaping as it relates to water quality, fertilizer use recommendations, and New Hampshire’s Turf Fertilizer Law.
Water Quality and Lawn Care
The UNH Cooperative Extension provides various articles about lawn care as it relates to water quality.