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California · California (CIWQS)
Alhambra City
F
Usually reaches water
Reported events
40
Total volume
12.2M gal
Reached waterways
24 (60%)
Reporting since
2007
What caused the overflows
Other / Unknown
12
Equipment Failure
10
Grease / FOG
9
Root Intrusion
9
Reported overflow events (showing 40 of 40)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Apr 14, 2026 | 100 gal | Other / Unknown | Yes | Laguna Wash / La River |
| Jun 6, 2023 | 25K gal | Grease / FOG | Yes | Rio Hondo/LA River |
| Jun 6, 2023 | 25K gal | Grease / FOG | Yes | Rio Hondo/LA River |
| Jun 3, 2023 | 25K gal | Grease / FOG | Yes | Rio Hondo/LA River |
| Jun 3, 2023 | 25K gal | Grease / FOG | Yes | Rio Hondo/LA River |
| Sep 10, 2022 | 897 gal | Equipment Failure | — | Building or Structure |
| May 2, 2021 | 2K gal | Other / Unknown | — | Separate Storm Drain |
| Oct 6, 2020 | 4K gal | Equipment Failure | Yes | Surface Water |
| Aug 28, 2018 | 78 gal | Root Intrusion | — | Street/Curb and Gutter |
| Mar 29, 2017 | 62 gal | Root Intrusion | — | Street/Curb and Gutter |
| Dec 28, 2015 | 1K gal | Equipment Failure | Yes | Separate Storm Drain;Street/Curb and Gutter |
| Nov 29, 2015 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 17, 2015 | 221 gal | Root Intrusion | — | Unpaved surface |
| Mar 1, 2015 | 338 gal | Other / Unknown | Yes | Separate Storm Drain |
| May 27, 2014 | 375 gal | Equipment Failure | Yes | Paved Surface;Separate Storm Drain;Street/Curb and Gutter |
| Feb 12, 2014 | 906 gal | Equipment Failure | Yes | Drainage Channel;Separate Storm Drain;Street/Curb and Gutter |
| Jul 26, 2013 | 15K gal | Other / Unknown | Yes | Building or structure;Separate storm drain;Street/curb and gutter |
| Apr 20, 2013 | 720 gal | Grease / FOG | Yes | Separate storm drain |
| Apr 1, 2013 | 3K gal | Grease / FOG | Yes | Separate storm drain |
| Feb 21, 2013 | 920 gal | Root Intrusion | — | Building or structure |
| Aug 22, 2012 | 11.5M gal | Other / Unknown | Yes | Separate storm drain |
| Oct 20, 2011 | 423K gal | Equipment Failure | Yes | Separate storm drain;Other (specify below) |
| Apr 4, 2011 | 2K gal | Grease / FOG | — | Building or structure |
| Mar 21, 2011 | 7K gal | Other / Unknown | — | Separate storm drain |
| Feb 8, 2011 | 50 gal | Grease / FOG | — | Separate storm drain |
| Oct 17, 2010 | 15 gal | Other / Unknown | — | Street/curb and gutter |
| Mar 2, 2010 | 50 gal | Equipment Failure | — | Storm drain |
| Nov 28, 2009 | 900 gal | Other / Unknown | Yes | Storm drain |
| Jan 9, 2009 | 200 gal | Root Intrusion | Yes | Storm drain;Surface water |
| Aug 26, 2008 | 900 gal | Other / Unknown | Yes | Storm drain;Surface water |
| Mar 17, 2008 | 150 gal | Other / Unknown | — | Street/curb and gutter |
| Feb 3, 2008 | 55K gal | Other / Unknown | Yes | Storm drain;Surface water |
| Oct 27, 2007 | 430 gal | Root Intrusion | Yes | Storm drain |
| Oct 17, 2007 | 9 gal | Root Intrusion | — | Street/curb and gutter |
| Oct 6, 2007 | 450 gal | Equipment Failure | Yes | Storm drain |
| Sep 16, 2007 | 2K gal | Equipment Failure | Yes | Storm drain |
| Sep 15, 2007 | 60 gal | Other / Unknown | — | Street/curb and gutter |
| Jun 25, 2007 | 400 gal | Grease / FOG | Yes | Storm drain;Street/curb and gutter;Surface water |
| Apr 26, 2007 | 15 gal | Root Intrusion | — | Street/curb and gutter |
| Jan 4, 2007 | 225 gal | Root Intrusion | Yes | Separate storm drain |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.