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California · California (CIWQS)
Calabasas City
F
Usually reaches water
Reported events
40
Total volume
57K gal
Reached waterways
27 (68%)
Reporting since
2007
What caused the overflows
Other / Unknown
24
Root Intrusion
8
Equipment Failure
6
Grease / FOG
2
Reported overflow events (showing 40 of 40)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Nov 30, 2025 | 50 gal | Grease / FOG | — | — |
| May 13, 2025 | 500 gal | Equipment Failure | Yes | Las Virgenes Creek |
| Jul 28, 2024 | 3K gal | Equipment Failure | Yes | Las Virgenes Creek |
| Feb 12, 2024 | 3K gal | Equipment Failure | Yes | Bell Creek Cold Creek - Malibu Creek, Los Angeles River |
| May 18, 2023 | 1K gal | Other / Unknown | Yes | Los Angeles River |
| Nov 28, 2022 | 850 gal | Other / Unknown | Yes | Other (specify below);Unpaved surface |
| Nov 12, 2022 | 3K gal | Other / Unknown | Yes | Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Feb 10, 2022 | 270 gal | Other / Unknown | Yes | Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Jan 8, 2022 | 2K gal | Equipment Failure | Yes | Drainage Channel;Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Nov 1, 2021 | 150 gal | Other / Unknown | — | Other (specify below) |
| Oct 26, 2021 | 8K gal | Other / Unknown | Yes | Drainage Channel;Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Jan 5, 2021 | 270 gal | Other / Unknown | Yes | Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Jun 4, 2020 | 500 gal | Other / Unknown | Yes | Drainage Channel;Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Feb 11, 2020 | 3K gal | Other / Unknown | Yes | Drainage Channel;Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Jan 24, 2020 | 4K gal | Other / Unknown | — | Other (specify below) |
| Jul 7, 2019 | 100 gal | Other / Unknown | — | Other (specify below);Unpaved surface |
| May 12, 2019 | 3K gal | Root Intrusion | Yes | Drainage Channel;Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Dec 17, 2017 | 3K gal | Root Intrusion | Yes | Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Dec 3, 2016 | 7K gal | Equipment Failure | Yes | Other (specify below);Street/Curb and Gutter;Unpaved surface |
| Oct 26, 2016 | 100 gal | Other / Unknown | — | Drainage Channel;Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Oct 13, 2016 | 900 gal | Other / Unknown | — | Other (specify below);Unpaved surface |
| May 6, 2016 | 4K gal | Other / Unknown | Yes | Other (specify below) |
| Nov 13, 2015 | 50 gal | Root Intrusion | — | Building or Structure;Other (specify below);Unpaved surface |
| Jun 1, 2015 | 3K gal | Other / Unknown | — | Other (specify below) |
| Sep 4, 2014 | 200 gal | Equipment Failure | Yes | Drainage Channel;Other (specify below);Separate Storm Drain |
| Jul 30, 2014 | 50 gal | Other / Unknown | — | Unpaved surface |
| Feb 3, 2014 | 75 gal | Other / Unknown | Yes | Surface Water |
| Sep 9, 2013 | 30 gal | Other / Unknown | — | Other (specify below);Paved Surface;Unpaved surface |
| Jun 25, 2013 | 1K gal | Grease / FOG | Yes | Other (specify below) |
| Apr 28, 2013 | 100 gal | Root Intrusion | Yes | Separate storm drain;Other (specify below) |
| Dec 12, 2012 | 100 gal | Root Intrusion | — | Building or structure |
| Apr 20, 2009 | 160 gal | Other / Unknown | Yes | Other (specify below) |
| Sep 26, 2008 | 150 gal | Root Intrusion | Yes | Other (specify below) |
| Jul 19, 2008 | 1K gal | Root Intrusion | Yes | Storm drain;Other (specify below) |
| Oct 26, 2007 | 300 gal | Other / Unknown | — | Other (specify below) |
| Oct 19, 2007 | 300 gal | Other / Unknown | Yes | Other (specify below) |
| Aug 21, 2007 | 200 gal | Other / Unknown | — | Street/curb and gutter |
| Jul 26, 2007 | 200 gal | Other / Unknown | Yes | Storm drain |
| Jul 1, 2007 | 3K gal | Other / Unknown | Yes | Other (specify below) |
| Jun 2, 2007 | 800 gal | Root Intrusion | Yes | Storm drain |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.