Nitrogen strategy meetings coming to a coastal community near you!

CT DEEP and UConn NEMO are holding three meetings across Connecticut’s coast this August. We’ll be discussing the status of nitrogen pollution in Long Island Sound, DEEP’s strategy to address it and what communities can do to help. We’ll then present tools and outreach material that can help reduce nitrogen levels in stormwater and meet certain requirements of the updated MS4 permit.

Please RSVP at if you plan to attend one of the meetings.

Eastern CT
Tuesday August 8,  2 – 4:00pm
Waterford Town Hall Auditorium

Central CT
Tuesday August 15,  2 – 4:00pm
SCRCOG office – North Haven, CT

Western CT
Tuesday August 22,  2 – 4:00pm
Westport Town Hall Auditorium

If you have questions, please contact Amanda Ryan (

Green infrastructure demonstration sites at East Lyme beach parking lot

After 7 years of diligent stormwater infiltration, it seems like a lot of people know about the green stormwater infrastructure (GSI) practices at the Hole-in-the-Wall beach parking lot in East Lyme – in no small part due to the stormwater classroom held here every year.

Permeable paver demonstration

Each May, town staff with help from many partners including CT DEEP, Southern Connecticut Regional Resources Recovery Authority, Ledge Light Health District, and teachers and students from East Lyme’s Middle and High schools host a stormwater classroom at the beach for all third grade students (and this year students from Salem participated too). This event has become a time-honored East Lyme tradition and a key part of their MS4 public outreach and education program.

It’s worth visiting anytime if you’re interested in seeing many different types of pervious surfaces and how they’ve fared after many years with minimal maintenance.  Bill Scheer ( Deputy public works director or Victor Benni ( Town engineer, would be happy to share their insights and favorite treatments from the perspective of people responsible for their original installation and ongoing maintenance.

In addition to ten different types of pervious surfaces, you can see an above ground hydrodynamic separator (very rare opportunity!), a tree box filter, a rain garden, and a series of detention/infiltration basins which are the last line of defense before stormwater and all it carries with it from a 23-acre watershed empties into Long Island Sound.

Take a look at this PowerPoint for pictures of all the green stormwater infrastructure practices at Hole-in-the-Wall Beach.


Completing the Watershed Table on Your Registration Form

We received several inquiries about completing the watershed table on page 3 of the MS4 registration form. You can get all the information you need from our MS4 Map.

Amanda put together a quick video tutorial on how to get all of the Waterbody Names and IDs.

The impairments information is also included in the map (2014 Impaired Rivers, Lakes, Estuaries).  However, we are currently working with DEEP on identifying exactly which impairments need to be included. Once we have that information, we will be updating the map and posting a video here on how to interpret. In the meantime, you can refer to the 2014 State Integrated Water Quality Report.


MS4 Management Software Demos

Several folks have been asking if there is a software program available to help manage MS4 activities and reporting under the new permit. We have found a couple of options: PermitTrack and MS4Front.

To help you compare the two and evaluate whether they would be of use to you, we held webinar demos for each on Feb. 15. See recordings of the webinars below.

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Webinar – Getting Started with Your SWM Plan

NEMO is holding a webinar on Tuesday February 7 at 2pm focused on the first step in your journey through the new MS4 General Permit requirements – registration and your Stormwater Management (SWM) Plan.

For the 121 communities (plus institutions) covered under CT DEEP’s newly revised “MS4” stormwater regulations, the first requirements are to develop (or revise) a Stormwater Management Plan (SWMP) and register as an MS4. Draft SWMPs are to be posted for public comment and submitted to CT DEEP by April 1, 2017. That’s 2 months away. Yikes!

Fear not, this presentation will cover what’s required to be in the plan, share a template for a SWM Plan that you can adapt and use, and introduce you to NEMO’s new MS4 Online Guide (the website you are on now) – a repository for tools, maps and information related to the permit.

The webinar will be presented by our new MS4 Circuit Rider, Amanda Ryan, and Dave Dickson.

The webinar recording can be found on our Webinars Page (in the Tools section).