News Archive

UNHSC announces the release of its 2012 biennial report

Friday, October 19, 2012

We are happy to announce the release of our 2012 biennial report!  This is the last general report on our research summarizing 8 years of stormwater BMP research funded by CICEET.  We thank you all for your patience and support over the years and sincerely hope that this information will be useful.

Download the UNHSC 2012 Biennial Report

EPA's Webinar on Stormwater, Coal-Tar Sealcoat, and Polycyclic Aromatic Hydrocarbons (PAHs)

Monday, June 04, 2012

EPA's Webinar on Stormwater, Coal-Tar Sealcoat, and Polycyclic Aromatic Hydrocarbons (PAHs)

June 14, 2012 01:00pm - 03:45pm Eastern ---EPA’s Stormwater Pollution Prevention Webinar Series will highlight efforts to reduce pollutants in stormwater through controlling these pollutants at their sources. The first in EPA’s Stormwater Pollution Prevention Webinar Series will cover the topic of Stormwater, Coal-Tar Sealcoat, and Polycyclic Aromatic Hydrocarbons (PAHs). The webinar will present information on the prevalence of PAHs from coal-tar-based sealcoat in the environment, and on the environmental and human health impacts. The webinar will also cover actions taken to address PAHs by a state and a city.

Workshop flyer link    click here
Workshop agenda and registration information .

Portsmouth's State Street Receives Outstanding Civil Engineering Achievement Award for 2010

Sunday, October 30, 2011

State Street Tree Filter

Portsmouth's State Street Project Receives ASCE NH Award – The transformation of Portsmouth's State Street has received recognition as the Outstanding Civil Engineering Achievement Award for 2010 by the New Hampshire Section of the American Society of Civil Engineers. The project was led by CMA Engineers of Portsmouth, NH, partnering with the UNHSC for the LID design. The State Street Redesign included a combined sewer separation, the use of a numerous tree filters, a large subsurface chamber system in series with an underground sand filter and other forms of advanced stormwater management.

Berry Brook Restoration Project-Urban Watershed Renewal

Thursday, August 25, 2011


Water quality and stream restoration improvements will be targeted in the Berry Brook Watershed from 2011-2013. Berry Brook, a tributary to the Cocheco River, is a 0.9 mile long stream in a 164 acre watershed in downtown Dover.  The brook is impaired for aquatic habitat and primary contact recreation.  Through a series of three grants and matching funding from the City of Dover, this project will implement some of the major recommendations from the 2008 Watershed Management Plan for Berry Brook.

Berry Brook Project Website Link

NH Stormwater Commission Report Summary

Saturday, May 14, 2011

SW Commission thumbnail

This document summarizes the major points from the Stormwater Study Commission November 2010 Final Report. The New Hampshire legislature established the Stormwater Commission in 2008 to identify issues and find solutions to reduce impacts from stormwater runoff. This Summary Brief is a non-technical overview intended for the legislature and other public officials. The report includes 5 major recommendations for action.

Summary Overview

Stormwater is recognized as one of the leading causes of water pollution in the United States. In New Hampshire, stormwater contributes to over 80% of the surface water quality impairments according to water quality data compiled by NH DES.  Impervious surfaces (e.g., roads, rooftops, parking lots, lawns in the shoreland zone) and other land use development cause most stormwater runoff.  Moreover, increasing imperviousness from development contributes to increased frequency and magnitude of flooding. Recent flooding in NH, exacerbated by imperviousness, has resulted in a tragic loss of life and millions of dollars of damage to our road and highway systems, private residences, and business properties. New regulations and action is needed on a State level in preference to and advance of new Federal regulations

WA Set to Ban Coal-Tar Sealcoat

Monday, March 28, 2011

Washington State is poised to become the first state to ban coal-tar sealant used on pavements and parking lots.

A state measure—overwhelmingly approved last month by the House and now under consideration in the WA Senate—would ban the toxic asphalt sealant derived from coal tar, a waste product of steelmaking.

Polycyclic aromatic hydrocarbons, more commonly known as PAHs, occur in oil, coal, and tar-based products, and are also produced as byproducts of fuel burning. The EPA considers these products to be carcinogenic and heavily regulate activities known to be sources of PAHs such as coking operations and coal gasification processes.

For decades, home and business owners have been seal coating their driveways and parking lots. Research conducted by the USGS, the UNHSC and others indicates that sealcoat activities, especially with coal tar based sealant products, may contribute significant amounts of polycyclic aromatic hydrocarbons entering waterways from stormwater runoff.

New Winter Maintenance Specifications for Porous Pavements

Tuesday, February 01, 2011

In February 2011, UNHSC published new winter maintenance specifications for porous pavements. You can download the document here »

NH Rain Garden Training 2010

Monday, October 25, 2010

The Stormwater Center is one of the sponsors of the New Hampshire Rain Garden Training for Professional Landscapers, to be held October 25 & 26, 2010 at the Urban Forestry Center in Portsmouth, NH. More information »

UNHSC on NHPTV's Planet Granite

Tuesday, January 05, 2010

UNHSC partnerships highlighed on NHPTV's Planet Granite

Watch the full episode. See more NHPTV Specials.

First Porous Asphalt Road in NH

Tuesday, December 08, 2009

A new active adult community in Pelham is home to the state’s first porous asphalt road, thanks to the efforts of the University of New Hampshire Stormwater Center. More Information »

UNH Today, 12.08.09