All rankings
New York · New York (DEC)
Mamaroneck (V) Sanitary SD NY0026701
Permit NY0026701
F
Usually reaches water
Reported events
36
Total volume
525.3M gal
Reached waterways
36 (100%)
Reporting since
2021
What caused the overflows
Rainfall / Flooding
30
Equipment Failure
4
Grease / FOG
2
Reported overflow events (showing 36 of 36)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Mar 14, 2023 | 518K gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Mar 14, 2023 | 5.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Mar 3, 2023 | 979K gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Mar 3, 2023 | 5.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Jan 25, 2023 | 19.1M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Jan 25, 2023 | 5.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Oct 5, 2022 | 1.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Oct 5, 2022 | 33K gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Sep 13, 2022 | 3.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Sep 13, 2022 | 1.3M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Jul 18, 2022 | 4.7M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Jul 18, 2022 | 10.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Jun 29, 2022 | 25K gal | Grease / FOG | Yes | Mamaroneck River West Branch |
| Jun 29, 2022 | — | Grease / FOG | Yes | Mamaroneck River West Branch |
| Jun 12, 2022 | 136K gal | Rainfall / Flooding | Yes | Long Island Sound |
| Jun 12, 2022 | 1.0M gal | Rainfall / Flooding | Yes | Long Island Sound |
| Jun 2, 2022 | 1.1M gal | Rainfall / Flooding | Yes | Long Island Sound |
| Jun 2, 2022 | 10.0M gal | Rainfall / Flooding | Yes | Long Island Sound |
| Apr 18, 2022 | 10.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Apr 18, 2022 | 7.7M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Apr 7, 2022 | 17.9M gal | Rainfall / Flooding | Yes | Long Island Sound |
| Apr 7, 2022 | 5.0M gal | Rainfall / Flooding | Yes | Long Island Sound |
| Oct 26, 2021 | 14.5M gal | Rainfall / Flooding | Yes | Long Island Sound |
| Oct 26, 2021 | 50.0M gal | Rainfall / Flooding | Yes | Long Island Sound |
| Sep 27, 2021 | — | Equipment Failure | Yes | Unnamed Stream Tributary to Mamaroneck River |
| Sep 27, 2021 | — | Equipment Failure | Yes | Unnamed Stream Tributary to Mamaroneck River |
| Sep 27, 2021 | — | Equipment Failure | Yes | Unnamed Stream Tributary to Mamaroneck River |
| Sep 27, 2021 | — | Equipment Failure | Yes | Unnamed Stream Tributary to Mamaroneck River |
| Sep 1, 2021 | 98.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Sep 1, 2021 | 40.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Aug 22, 2021 | 45.9M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Aug 22, 2021 | 45.9M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Aug 22, 2021 | 35.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Aug 22, 2021 | 35.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Jul 8, 2021 | 23.5M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
| Jul 8, 2021 | 29.0M gal | Rainfall / Flooding | Yes | LONG ISLAND SOUND |
Source: New York (DEC). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.