Basics

MS4 Important Dates & Deadlines

The overall effective dates of the permit are July 1, 2017 - June 30, 2022

Upcoming Dates

NEMO has created a Google Calendar that will include import deadlines from the permit as well as dates of webinars, trainings, and other events.




To add the CT MS4 Calendar to your outlook, macOS, iOS, or other calendar applicaiton, use this link: https://calendar.google.com/calendar/ical/29pn3emsoqeb84v6t8j82778as%40group.calendar.google.com/public/basic.ics.


Key Permit Dates At-A-Glance

Task Due -Existing Permitees (2004 MS4s) Due - New Permitees (2017 MS4s) Fees Notes
Registration form        

Submit to DEEP with link or copy of SWMP

Submit by 4/3/17

Submit by 4/3/17

$312.50 (towns)
$625 (institutions)

 
Stormwater Management Plan (SWMP)        

Post for public review/comment and send link or elec. copy to DEEP

By 4/3/17

By 4/3/17

 

Must be posted for review for 60 days

Minimum Control Measures        
Public education and outreach        
Begin program 6/30/18 6/30/19    
Public Involvement/Participation        
Public notice of SWMP & annual report annually by 1/31 starting in 2018 annually by 1/31 starting in 2018   Allow for 30 day comment period
Illicit Discharge Detection & Elimination        
Written IDDE Program 6/30/18 6/30/19    
Outfall list mapping 6/30/19 6/30/20    
IDDE Legal Authority Within 2 years of start of first fiscal year after 7/1/17 Within 3 years of start of first fiscal year after 7/1/17    
Construction Stormwater Management        
Implement construction site runoff (adherence to E&SC guidelines) 6/30/19 6/30/20    
Post-construction stormwater management        
Implement regulations stating that developers must consider LID (establish legal authority), Consider doing reviews prior to deadline 6/30/21 6/30/22    
Runoff reduction/LID for new or redevelopment (specific retention requirements depending on %DCIA) 6/30/19 6/30/20    
Calculate DCIA contributing to each outfall 6/30/20 6/30/20   Plan for determining must be included in SWMP
Implement maintenance plan for retention or detention ponds, and other stormwater treatment structures 6/30/19 6/30/20    
Pollution prevention/good housekeeping        
Develop employee training program 6/30/19 6/30/19    
Infrastructure repair, rehab and retrofit- develop program Already part of old permit, 6/30/2020 if not done yet 6/30/20    
DCIA reduction tracking-begin 7/1/17 7/1/17   Installations back to 7/1/12 can be counted
Retrofit planning Devlop implementation plan for inclusion in Annual report dated 4/1/20 Devlop implementation plan for inclusion in Annual report dated 4/1/20    
Retrofit schedule- Begin implementing retrofit projects 6/30/22 6/30/22    
MS4 Property and Operations maintenance Efforts documented in annual report Efforts documented in annual report    
Street, parking and MS4 maintenance        
Sweeping Minimum once annually in spring; plan to be submitted as part of annual report by 4/1/18 Minimum once annually in spring; plan to be submitted as part of annual report by 4/1/18    
Catch basin cleaning Within urbanized area, inspect by 12/31/20. Outside of urban area where DCIA is >11% or where they discharge to an impaired water, by 12/31/22 Within urbanized area, inspect by 12/31/20. Outside of urban area where DCIA is >11% or where they discharge to an impaired water, by 12/31/22    
Snow management practices        
Deicing material management. Develop and implement SOPs for use, handling, storage, application and disposal of deicers. No deadline given. No deadline given    
Snow and ice control practices-implement and refine SOPs for snow and ice control. Document results in annual reports Document results in annual reports    
Interconnected MS4s- Coordinate with operators of interconnected MS4s. No deadline given. No deadline given    
Sources contributing pollutants to MS4- Develop and implement program to control pollutants to MS4 from other sources. No deadline given. No deadline given    
Additional measures for waters which nitrogen, phosphorus, or bacteria is a stormwater pollutant of concern Identify problem areas and actions taken in annual reports Identify problem areas and actions taken in annual reports    
Monitoring        
Impaired waters discharge mapping 6/30/18 6/30/19    
Outfall screening-begin 6/30/18 6/30/19    
Follow-up investigation 6/30/19 6/30/20    
Annual Reports        
Post for public review/comment annually by 1/31 starting in 2018 annually by 1/31 starting in 2018   Permit suggests not due until 2019, but DEEP has confirmed 1st report due in 2018
Submit report to DEEP annually by 4/1, starting in 2018 annually by 4/1, starting in 2018 $375 Municipalities pay 50% reduced rate ($187.50)