Author: Amanda Ryan

Annual Report templates are here!

There are two versions of the Annual Report template: one for existing 2004 MS4 permittees and another for new 2017 MS4 permittees. They are nearly identical – the biggest difference is that the due dates for many BMPs are later for new permittees. DEEP  strongly encourages using these templates but they’ll accept other formats that include all permit reporting requirements.

The templates can be found under the Implementation section > Annual Reports and they’re saved as Microsoft Word documents to allow for easy editing.  If you have any trouble working with the document – feel free to reach out to me (Amanda) I might be able to help!

Timeline for completing the report: Notify the public about the pending availability of the Annual Report and Stormwater Management Plan by January 31st. The deadline to actually post the report and plan to your website is February 15th. Then the final report should be submitted to DEEP by April 1st.




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.