All rankings
California · California (CIWQS)
Alameda City
D
Frequently reaches water
Reported events
107
Total volume
351K gal
Reached waterways
37 (35%)
Reporting since
2002
What caused the overflows
Equipment Failure
42
Grease / FOG
29
Other / Unknown
25
Root Intrusion
10
Rainfall / Flooding
1
Reported overflow events (showing 107 of 107)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Nov 10, 2025 | 85K gal | Other / Unknown | Yes | San Leandro Bay |
| May 19, 2025 | 1K gal | Other / Unknown | — | — |
| Feb 19, 2024 | 65 gal | Equipment Failure | Yes | South Shore Beach |
| Sep 14, 2023 | 12 gal | Grease / FOG | Yes | SF Bay |
| Mar 30, 2023 | 3 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Mar 26, 2023 | 10 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Feb 22, 2023 | 2 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Dec 31, 2022 | 110K gal | Other / Unknown | Yes | Surface Water |
| Dec 21, 2022 | 41 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter |
| Dec 17, 2022 | 2 gal | Root Intrusion | — | Paved Surface |
| Nov 17, 2022 | 27 gal | Equipment Failure | — | Paved Surface;Separate Storm Drain |
| Sep 21, 2022 | 15 gal | Equipment Failure | — | Paved Surface |
| Aug 17, 2022 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Aug 2, 2022 | 5 gal | Grease / FOG | — | Street/Curb and Gutter |
| Jul 18, 2022 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jul 13, 2022 | 17 gal | Root Intrusion | — | Street/Curb and Gutter;Unpaved surface |
| Jun 10, 2022 | 10 gal | Other / Unknown | — | Street/Curb and Gutter |
| Jun 9, 2022 | 10 gal | Grease / FOG | — | Paved Surface |
| Nov 6, 2021 | 1K gal | Grease / FOG | — | Other (specify below) |
| Oct 3, 2021 | 14 gal | Grease / FOG | — | Paved Surface;Street/Curb and Gutter |
| Sep 28, 2021 | 100 gal | Equipment Failure | — | Paved Surface |
| Sep 25, 2021 | 367 gal | Equipment Failure | Yes | Paved Surface;Surface Water |
| Aug 18, 2021 | 55 gal | Other / Unknown | — | Building or Structure |
| Jun 16, 2021 | 585 gal | Grease / FOG | Yes | Other (specify below);Paved Surface;Separate Storm Drain |
| Mar 19, 2021 | 5 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Dec 15, 2020 | 20 gal | Root Intrusion | — | Street/Curb and Gutter |
| Nov 30, 2020 | 421 gal | Equipment Failure | — | Separate Storm Drain;Street/Curb and Gutter |
| Aug 24, 2020 | 650 gal | Grease / FOG | Yes | Separate Storm Drain |
| Feb 3, 2020 | 25 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Jan 14, 2020 | 3K gal | Equipment Failure | Yes | Paved Surface;Separate Storm Drain |
| Dec 19, 2019 | 1K gal | Equipment Failure | Yes | Paved Surface;Separate Storm Drain;Street/Curb and Gutter |
| Dec 19, 2019 | 6K gal | Equipment Failure | Yes | Other (specify below);Paved Surface |
| Dec 14, 2019 | 7K gal | Grease / FOG | Yes | Paved Surface;Separate Storm Drain;Street/Curb and Gutter |
| Oct 26, 2019 | 10 gal | Equipment Failure | — | Separate Storm Drain;Street/Curb and Gutter |
| Oct 20, 2019 | 4K gal | Equipment Failure | Yes | Street/Curb and Gutter;Surface Water;Unpaved surface |
| Oct 13, 2019 | 10 gal | Grease / FOG | — | Street/Curb and Gutter |
| Oct 12, 2019 | 10 gal | Grease / FOG | — | Street/Curb and Gutter |
| Oct 12, 2019 | 10 gal | Grease / FOG | — | Street/Curb and Gutter |
| Jan 2, 2019 | 64 gal | Grease / FOG | — | Paved Surface |
| Dec 29, 2018 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Oct 1, 2018 | 520 gal | Equipment Failure | Yes | Other (specify below);Street/Curb and Gutter |
| Aug 30, 2018 | 225 gal | Equipment Failure | Yes | Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water |
| Jul 1, 2018 | 550 gal | Grease / FOG | Yes | Other (specify below);Paved Surface;Separate Storm Drain |
| Jun 6, 2018 | 7 gal | Equipment Failure | — | Unpaved surface |
| Feb 19, 2018 | 250 gal | Grease / FOG | — | Paved Surface;Unpaved surface |
| Jan 15, 2018 | 3K gal | Equipment Failure | Yes | Surface Water |
| Nov 21, 2017 | 200 gal | Grease / FOG | Yes | Drainage Channel;Separate Storm Drain;Street/Curb and Gutter |
| Oct 29, 2016 | 75 gal | Equipment Failure | — | Building or Structure |
| Jul 1, 2015 | 650 gal | Equipment Failure | Yes | Paved Surface;Street/Curb and Gutter;Surface Water |
| Jun 20, 2015 | 5 gal | Grease / FOG | — | Building or Structure;Paved Surface |
| Feb 17, 2015 | 100 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Feb 17, 2015 | 100 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Feb 10, 2015 | 50 gal | Equipment Failure | Yes | Separate Storm Drain |
| Dec 20, 2014 | 75 gal | Grease / FOG | Yes | Separate Storm Drain;Street/Curb and Gutter |
| Dec 8, 2014 | 450 gal | Equipment Failure | Yes | Surface Water |
| Nov 25, 2014 | 200 gal | Equipment Failure | Yes | Street/Curb and Gutter;Surface Water |
| Oct 8, 2014 | 100 gal | Other / Unknown | Yes | Drainage Channel |
| Jul 11, 2014 | 100 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter;Unpaved surface |
| Jul 4, 2014 | 425 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Apr 17, 2014 | 100 gal | Equipment Failure | — | Paved Surface;Separate Storm Drain |
| Apr 13, 2014 | 400 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Feb 13, 2014 | 320 gal | Equipment Failure | Yes | Surface Water |
| Jun 22, 2013 | 150 gal | Grease / FOG | — | Separate storm drain;Street/curb and gutter |
| Mar 15, 2013 | 200 gal | Equipment Failure | — | Street/curb and gutter;Other (specify below) |
| Mar 13, 2013 | 75 gal | Grease / FOG | — | Other paved surface;Street/curb and gutter |
| Jan 7, 2013 | 50 gal | Grease / FOG | — | Other paved surface;Separate storm drain;Street/curb and gutter |
| Sep 20, 2012 | 150 gal | Other / Unknown | — | Other paved surface;Separate storm drain;Street/curb and gutter |
| Aug 15, 2012 | 200 gal | Equipment Failure | — | Street/curb and gutter |
| Aug 4, 2012 | 1K gal | Other / Unknown | Yes | Beach;Separate storm drain;Street/curb and gutter;Surface water |
| May 30, 2012 | 310 gal | Other / Unknown | Yes | Separate storm drain;Surface water |
| May 8, 2012 | 45 gal | Grease / FOG | — | Street/curb and gutter |
| Jan 17, 2012 | 300 gal | Other / Unknown | — | Street/curb and gutter |
| Jan 2, 2012 | 250 gal | Other / Unknown | Yes | Combined storm drain (combined CS only);Other paved surface;Street/curb and gutter;Surface water |
| Dec 11, 2011 | 200 gal | Other / Unknown | Yes | Separate storm drain;Street/curb and gutter;Surface water |
| Nov 18, 2011 | 125 gal | Other / Unknown | — | Other paved surface;Separate storm drain;Street/curb and gutter |
| Sep 8, 2011 | 900 gal | Other / Unknown | — | Other paved surface;Separate storm drain;Unpaved surface |
| Aug 17, 2011 | 100 gal | Other / Unknown | — | Separate storm drain;Street/curb and gutter |
| May 27, 2011 | 150 gal | Other / Unknown | — | Other paved surface;Unpaved surface |
| Apr 26, 2011 | 50 gal | Equipment Failure | Yes | Separate storm drain;Surface water |
| Feb 22, 2011 | 25 gal | Other / Unknown | — | Street/curb and gutter |
| Feb 1, 2011 | 5K gal | Other / Unknown | — | Building or structure |
| Aug 2, 2010 | 2 gal | Other / Unknown | — | Street/curb and gutter |
| Apr 3, 2010 | 30 gal | Root Intrusion | — | Unpaved surface |
| Feb 24, 2010 | 5 gal | Root Intrusion | — | Street/curb and gutter |
| Nov 19, 2009 | 80 gal | Other / Unknown | Yes | Beach |
| Nov 5, 2009 | 7 gal | Root Intrusion | — | Unpaved surface |
| Aug 18, 2009 | 20 gal | Other / Unknown | — | Street/curb and gutter |
| Mar 12, 2009 | 1 gal | Other / Unknown | — | Other (specify below) |
| Mar 12, 2009 | 5 gal | Root Intrusion | — | Street/curb and gutter |
| Mar 11, 2009 | 1 gal | Other / Unknown | — | Street/curb and gutter |
| Mar 10, 2009 | 250 gal | Grease / FOG | Yes | Other (specify below) |
| Mar 10, 2009 | 25 gal | Other / Unknown | — | Street/curb and gutter |
| Mar 8, 2009 | 100 gal | Grease / FOG | — | Other paved surface;Storm drain;Street/curb and gutter |
| Mar 5, 2009 | 20 gal | Other / Unknown | — | Street/curb and gutter |
| Feb 14, 2009 | 75 gal | Grease / FOG | — | Storm drain;Street/curb and gutter |
| Jan 7, 2009 | 2 gal | Equipment Failure | — | Building or structure |
| Aug 2, 2008 | 150 gal | Equipment Failure | Yes | Storm drain;Street/curb and gutter;Surface water |
| Jul 5, 2008 | 100 gal | Grease / FOG | Yes | Surface water |
| Jun 18, 2008 | 75 gal | Grease / FOG | Yes | Surface water |
| Feb 28, 2008 | 100 gal | Root Intrusion | — | Street/curb and gutter |
| Jan 28, 2008 | 100 gal | Equipment Failure | Yes | Storm drain |
| Sep 12, 2007 | 200 gal | Equipment Failure | — | Street/curb and gutter;Unpaved surface |
| Aug 8, 2007 | 800 gal | Grease / FOG | Yes | Beach;Storm drain;Street/curb and gutter;Surface water |
| Jul 24, 2007 | 200 gal | Grease / FOG | — | Building or structure |
| Jun 30, 2007 | 80 gal | Grease / FOG | — | Street/curb and gutter |
| Apr 30, 2007 | 10 gal | Equipment Failure | — | Other paved surface |
| Dec 31, 2002 | 110K gal | Rainfall / Flooding | Yes | Surface Water |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.