All rankings
California · California (CIWQS)
Santa Margarita Water District
F
Usually reaches water
Reported events
37
Total volume
3.7M gal
Reached waterways
22 (59%)
Reporting since
1996
What caused the overflows
Equipment Failure
15
Other / Unknown
13
Root Intrusion
4
Grease / FOG
3
Rainfall / Flooding
2
Reported overflow events (showing 37 of 37)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Aug 29, 2025 | 100 gal | Other / Unknown | — | — |
| Mar 18, 2025 | 600 gal | Other / Unknown | Yes | Horno Basin |
| Mar 17, 2025 | 1K gal | Equipment Failure | — | Horno Basin |
| May 8, 2023 | 500 gal | Other / Unknown | Yes | Separate Storm Drain |
| Mar 15, 2023 | 4K gal | Other / Unknown | Yes | Beach;Separate Storm Drain |
| Dec 26, 2022 | 60 gal | Equipment Failure | — | Unpaved surface |
| Sep 21, 2022 | 500 gal | Equipment Failure | Yes | Separate Storm Drain |
| Jan 13, 2022 | 250 gal | Other / Unknown | Yes | Drainage Channel |
| Oct 30, 2021 | 1K gal | Equipment Failure | — | Paved Surface;Unpaved surface |
| Mar 30, 2019 | 75 gal | Other / Unknown | Yes | Other (specify below) |
| Oct 24, 2018 | 750 gal | Equipment Failure | Yes | Paved Surface;Street/Curb and Gutter |
| Jun 27, 2018 | 900 gal | Equipment Failure | Yes | Surface Water |
| Apr 1, 2018 | 875 gal | Other / Unknown | Yes | Surface Water |
| Mar 1, 2018 | 3K gal | Other / Unknown | — | Other (specify below);Paved Surface;Street/Curb and Gutter |
| Feb 14, 2018 | 2K gal | Equipment Failure | Yes | Separate Storm Drain;Surface Water |
| Dec 22, 2017 | 400 gal | Other / Unknown | — | Unpaved surface |
| Jan 22, 2017 | 600 gal | Rainfall / Flooding | Yes | Surface Water |
| Jan 4, 2016 | 100 gal | Rainfall / Flooding | — | Unpaved surface |
| Dec 7, 2015 | 20 gal | Grease / FOG | — | Street/Curb and Gutter |
| Jul 28, 2015 | 60 gal | Root Intrusion | — | Street/Curb and Gutter |
| Nov 21, 2014 | 500 gal | Equipment Failure | Yes | Separate Storm Drain |
| Nov 15, 2014 | 200 gal | Equipment Failure | Yes | Surface Water |
| May 2, 2014 | 132 gal | Grease / FOG | Yes | Separate Storm Drain |
| Dec 31, 2011 | 2K gal | Other / Unknown | Yes | Surface water;Other (specify below) |
| Oct 20, 2011 | 23 gal | Equipment Failure | — | Other paved surface;Street/curb and gutter |
| Oct 1, 2011 | 7K gal | Other / Unknown | — | Unpaved surface |
| Sep 18, 2011 | 1K gal | Grease / FOG | Yes | Other (specify below) |
| Jun 6, 2010 | 150 gal | Root Intrusion | Yes | Other (specify below) |
| Mar 23, 2010 | 2.3M gal | Equipment Failure | Yes | Beach;Surface water;Other (specify below) |
| Jul 8, 2009 | 900 gal | Root Intrusion | Yes | Other (specify below) |
| Apr 30, 2008 | 900 gal | Other / Unknown | Yes | Surface water |
| Nov 3, 2007 | 500 gal | Equipment Failure | — | Other paved surface |
| Sep 14, 2007 | 10K gal | Equipment Failure | Yes | Other (specify below) |
| Jul 24, 2007 | 100 gal | Other / Unknown | — | Other (specify below) |
| Jun 4, 2007 | 200 gal | Equipment Failure | — | Unpaved surface |
| Feb 25, 2007 | 700 gal | Root Intrusion | Yes | Other (specify below) |
| Feb 1, 1996 | 1.3M gal | Equipment Failure | — | Other (specify below) |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.