Combined Sewer Overflow Public Notifications

Combined Sewer Overflow (CSO) public notifications will be posted to this page according to 314 CMR 16.04.

When a discharge or overflow occurs, The CIty of Chicopee will send out a public advisory notification.  On business days, this website will be updated within 18 hours of the notification.  During weekends or holidays, this website will be updated on the next business day. 

You can also see a list of discharge and overflow events on the MassDEP website (link below). This list is updated within 24 hours of when the public advisory notification is sent.  Enter CHICOPEE in the Permittee field and click “Search”. 

CSO Public Notification Clearinghouse Website- MassDEP 

The fastest way to get information is to sign up to receive public advisory notifications. To sign up, please send an email request to:

Quinn Lonczak- Project Supervisor-

For a map showing locations of the City's combined sewer outfalls with their NPDES numbers, please follow the below link:

Map of CSOs in Massachusetts

For the contents of the City's long-term CSO control plan and Integrated Management Plan, please follow this link:

Final Long Term Control Plan

Integrated Management Plan 2018 Update

For the City's previous annual NPDES CSO reports, please follow the below links:

CSO Annual Report- 2020

Discharge Data:

9/22/22 Data

9/22/22 Datos en Espanol

10/17/22 Data English

10/17/22 Datos en Espanol

10/24/22 Data English

10/24/222 Datos en Espanol

10/26/22 Data English

10/27/22 Datos en Espanol

11/11/22 Datos en Espanol

Data English 11/11/22

11/27/22 Data English

11/27/22 Datos en Espanol

12/16 Data English

1/7/23 Data English

1/7/23 Datos en Espanol

1/26/23 Data

1/26/23 Datos en Espanol

DWO Data in English 2/4/23

DWO Datos en espanol 2/4/23

3/28/23 Data

3/28/23 Datos en espanol

4/2/23 Data

4/2/23 Datos en espanol

4/23/23 Data

4/23/23 Datos en espanol

5/21/23 Data

5/21/23 datos en espanol

6/14/23 Data

6/14/23 datos en espanol

6/16/23 Data

6/16/23 datos en espanol

6/24/23 Data

6/24/23 datos en espanol

6/28/23 data

datos en espanol 6/28/23

7/2/23- 7/4/23 Data

7/2/23- 7/4/23 Datos en espanol

7/8/23 Data

7/8/23 Datos en espanol

7/10/23 Data

7/10/23 datos en espanol

7/16/23 datos en espanol

7/16/23 Data

7/29/23 Data

7/29/23 datos en espanol

8/8/2023 Data

8/8/2023 Datos en espanol

8/10/23 data

8/10/23 Datos en espanol 

9/11/23 Data

9/11/23 Datos en espanol

9/13/23 Data

9/13/23 datos en espanol