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Did you know... Runoff from rainwater carries a variety of non-point source pollutants, such as chemicals, nutrients, and sediments. These pollutants are transported across impervious surfaces, such as roofs & parking lots, and into local waterways either directly or through storm sewers.  Stormwater runoff is the most common way that non-point source pollution reaches local rivers, streams, and lakes. Development has a major impact on our water resources by replacing natural ground cover with manmade, impervious surfaces. Low Impact Development (LID) is an innovative stormwater management approach that minimizes this impact.  LID techniques focus on a specific site and can be applied to new as well as existing developments. These techniques are used to mimic a site’s pre-development hydrology by infiltrating, filtering, storing, evaporating, and detaining runoff close to its source.  LID preserves the hydrologic cycle, protects drinking water quality & quantity, benefits fish & wildlife, reduces flooding & property damage, and saves communities money.
University of New Hampshire Stormwater Center An Internet Guide to Financing Stormwater Management Innovative Stormwater Treatment Technologies, Best Management Practices Citizen's Guide to Maintaining Stormwater Best Management Practices Low Impact Development, Urban Design Tools EPA Model Stormwater Ordinances Stormwater Manager's Resource Center Manchester, NH Draft Stormwater Ordinance Milford, NH Stormwater Management & Erosion Control Regulations
Innovative Land Use Planning Techniques: A Handbook for Sustainable Development; NH DES, NH Association of Regional Planning Commissions, NH OEP, NH Local Government Center Protecting Water Resources with Smart Growth; US EPA Protecting Water Resources with Higher Density Development; US EPA Using Smart Growth Techniques as Stormwater Best Management Practices; US EPA To view all Lending Library publications, click here.
On May 29 iTRaC held a training session on stormwater management.  The evening began with a tour of Pennichuck Square to learn about the Low Impact Development techniques being used at the site.  Afterwards, Eileen Pannetier of Comprehensive Environmental Inc. (CEI) led a follow-up discussion on the Pennichuck Square site and Carolyn Russell of NH DES presented on ways to integrate stormwater management techniques into local planning efforts.  Click here for materials from this and other iTRaC trainings.

During a rainfall event or snow melt, some precipitation . . .
infiltrates the soil,	is taken up by plants,
or evaporates into the atmosphere.	But some remains, running off land & impervious surfaces. This is stormwater.

Page updated 3/18/08