All rankings
California · California (CIWQS)
Berkeley
C
Often reaches water
Reported events
341
Total volume
145K gal
Reached waterways
79 (23%)
Reporting since
2007
What caused the overflows
Root Intrusion
121
Equipment Failure
87
Other / Unknown
77
Grease / FOG
51
Rainfall / Flooding
4
Capacity Issue
1
Reported overflow events (showing 200 of 341)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| May 23, 2025 | 25 gal | Equipment Failure | — | N/A |
| Mar 25, 2025 | 50 gal | Equipment Failure | — | N/A |
| Sep 24, 2023 | 50 gal | Grease / FOG | — | — |
| Sep 10, 2023 | 30 gal | Equipment Failure | Yes | N/A |
| Aug 23, 2023 | 50 gal | Equipment Failure | — | — |
| Jul 31, 2023 | 50 gal | Equipment Failure | — | — |
| Jun 12, 2023 | 60 gal | Root Intrusion | Yes | Strawberry Creek |
| Jun 12, 2023 | 60 gal | Root Intrusion | Yes | Strawberry Creek |
| Mar 16, 2023 | 2 gal | Other / Unknown | — | Street/Curb and Gutter |
| Feb 23, 2023 | 10 gal | Other / Unknown | — | Street/Curb and Gutter |
| Feb 15, 2023 | 10 gal | Other / Unknown | — | Street/Curb and Gutter |
| Feb 15, 2023 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 9, 2023 | 30 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jan 13, 2023 | 50 gal | Other / Unknown | — | Street/Curb and Gutter |
| Dec 31, 2022 | 7K gal | Rainfall / Flooding | Yes | Separate Storm Drain |
| Sep 27, 2022 | 140 gal | Root Intrusion | Yes | Drainage Channel |
| Aug 9, 2022 | 100 gal | Grease / FOG | — | Building or Structure |
| May 2, 2022 | 250 gal | Grease / FOG | — | Street/Curb and Gutter |
| Mar 6, 2022 | 150 gal | Grease / FOG | — | Building or Structure |
| Jan 28, 2022 | 80 gal | Equipment Failure | — | Drainage Channel |
| Jan 26, 2022 | 350 gal | Equipment Failure | — | Drainage Channel |
| Nov 29, 2021 | 30 gal | Equipment Failure | — | Unpaved surface |
| Oct 11, 2021 | 800 gal | Root Intrusion | — | Unpaved surface |
| Sep 17, 2021 | 310 gal | Grease / FOG | Yes | Drainage Channel;Street/Curb and Gutter;Unpaved surface |
| Aug 18, 2021 | 15 gal | Root Intrusion | — | Other (specify below) |
| May 16, 2021 | 150 gal | Other / Unknown | — | Unpaved surface |
| May 12, 2021 | 50 gal | Root Intrusion | — | Unpaved surface |
| Apr 17, 2021 | 7 gal | Equipment Failure | — | Unpaved surface |
| Apr 14, 2021 | 100 gal | Other / Unknown | — | Drainage Channel |
| Apr 14, 2021 | 500 gal | Grease / FOG | — | Drainage Channel |
| Apr 8, 2021 | 15 gal | Root Intrusion | — | Street/Curb and Gutter |
| Apr 6, 2021 | 10 gal | Root Intrusion | — | Street/Curb and Gutter |
| Apr 4, 2021 | 50 gal | Root Intrusion | — | Street/Curb and Gutter |
| Mar 23, 2021 | 200 gal | Equipment Failure | — | Unpaved surface |
| Feb 22, 2021 | 135 gal | Equipment Failure | — | Separate Storm Drain |
| Feb 17, 2021 | 15 gal | Equipment Failure | — | Unpaved surface |
| Feb 10, 2021 | 7 gal | Equipment Failure | — | Unpaved surface |
| Nov 25, 2020 | 20 gal | Grease / FOG | Yes | Street/Curb and Gutter |
| Oct 29, 2020 | 10 gal | Grease / FOG | — | Separate Storm Drain |
| Oct 21, 2020 | 250 gal | Grease / FOG | — | Street/Curb and Gutter |
| Oct 19, 2020 | 5 gal | Other / Unknown | — | Street/Curb and Gutter |
| Oct 15, 2020 | 5 gal | Equipment Failure | — | Street/Curb and Gutter |
| Oct 14, 2020 | 3 gal | Other / Unknown | — | Street/Curb and Gutter |
| Oct 6, 2020 | 3 gal | Other / Unknown | — | Street/Curb and Gutter |
| Sep 30, 2020 | 900 gal | Equipment Failure | Yes | Separate Storm Drain |
| Aug 14, 2020 | 5 gal | Equipment Failure | — | Unpaved surface |
| Aug 5, 2020 | 120 gal | Grease / FOG | Yes | Street/Curb and Gutter |
| Aug 5, 2020 | 60 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jun 15, 2020 | 80 gal | Root Intrusion | — | Other (specify below) |
| Apr 15, 2020 | 5 gal | Other / Unknown | — | Street/Curb and Gutter |
| Mar 30, 2020 | 15 gal | Grease / FOG | — | Street/Curb and Gutter |
| Mar 20, 2020 | 10 gal | Equipment Failure | — | Unpaved surface |
| Mar 15, 2020 | 80 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 12, 2020 | 15 gal | Grease / FOG | — | Unpaved surface |
| Mar 11, 2020 | 30 gal | Grease / FOG | — | Street/Curb and Gutter |
| Mar 10, 2020 | 15 gal | Equipment Failure | — | Building or Structure |
| Mar 6, 2020 | 50 gal | Other / Unknown | — | Unpaved surface |
| Feb 29, 2020 | 300 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 29, 2020 | 10 gal | Other / Unknown | — | Street/Curb and Gutter |
| Dec 14, 2019 | 30 gal | Equipment Failure | — | Building or Structure |
| Nov 6, 2019 | 3 gal | Other / Unknown | — | Street/Curb and Gutter |
| Oct 22, 2019 | 3 gal | Other / Unknown | — | Other (specify below) |
| Oct 18, 2019 | 300 gal | Grease / FOG | Yes | Paved Surface;Separate Storm Drain;Street/Curb and Gutter |
| Oct 17, 2019 | 100 gal | Grease / FOG | — | Building or Structure |
| Sep 7, 2019 | 20 gal | Other / Unknown | — | Unpaved surface |
| Aug 3, 2019 | 25 gal | Equipment Failure | — | Unpaved surface |
| Jul 17, 2019 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 3, 2019 | 960 gal | Equipment Failure | Yes | Surface Water |
| Feb 13, 2019 | 100 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 6, 2019 | 25 gal | Equipment Failure | Yes | Drainage Channel |
| Dec 2, 2018 | 450 gal | Grease / FOG | — | Paved Surface;Street/Curb and Gutter |
| Nov 29, 2018 | 60 gal | Grease / FOG | — | Building or Structure |
| Nov 16, 2018 | 20 gal | Root Intrusion | — | Paved Surface |
| Nov 6, 2018 | 12 gal | Root Intrusion | Yes | Separate Storm Drain |
| Oct 24, 2018 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Aug 6, 2018 | 20 gal | Root Intrusion | — | Unpaved surface |
| Jun 19, 2018 | 10 gal | Equipment Failure | — | Unpaved surface |
| Apr 20, 2018 | 200 gal | Grease / FOG | — | Combined Storm Drain (Combined CS only);Street/Curb and Gutter |
| Apr 10, 2018 | 25 gal | Grease / FOG | — | Street/Curb and Gutter |
| Feb 13, 2018 | 50 gal | Root Intrusion | — | Building or Structure |
| Nov 5, 2017 | 20 gal | Root Intrusion | — | Unpaved surface |
| Oct 26, 2017 | 15 gal | Equipment Failure | — | Combined Storm Drain (Combined CS only) |
| Aug 5, 2017 | 4 gal | Equipment Failure | — | Paved Surface |
| Jun 23, 2017 | 20 gal | Root Intrusion | — | Paved Surface |
| May 5, 2017 | 50 gal | Equipment Failure | — | Paved Surface |
| Apr 7, 2017 | 100 gal | Grease / FOG | — | Separate Storm Drain |
| Mar 22, 2017 | 60 gal | Root Intrusion | — | Unpaved surface |
| Mar 8, 2017 | 30 gal | Other / Unknown | — | Street/Curb and Gutter |
| Feb 23, 2017 | 350 gal | Grease / FOG | Yes | Other (specify below);Street/Curb and Gutter |
| Feb 3, 2017 | 450 gal | Grease / FOG | Yes | Paved Surface;Separate Storm Drain;Street/Curb and Gutter |
| Jan 30, 2017 | 5 gal | Root Intrusion | — | Unpaved surface |
| Jan 6, 2017 | 300 gal | Root Intrusion | — | Unpaved surface |
| Dec 12, 2016 | 5 gal | Grease / FOG | — | Street/Curb and Gutter |
| Nov 29, 2016 | 5 gal | Root Intrusion | — | Street/Curb and Gutter |
| Oct 5, 2016 | 30 gal | Root Intrusion | — | Unpaved surface |
| Oct 2, 2016 | 10 gal | Equipment Failure | — | Unpaved surface |
| Aug 25, 2016 | 5 gal | Grease / FOG | — | Street/Curb and Gutter |
| Aug 24, 2016 | 20 gal | Equipment Failure | — | Unpaved surface |
| Aug 24, 2016 | 5 gal | Other / Unknown | — | Street/Curb and Gutter |
| Aug 19, 2016 | 2 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jul 26, 2016 | 5 gal | Grease / FOG | — | Building or Structure |
| Jul 20, 2016 | 250 gal | Other / Unknown | — | Street/Curb and Gutter |
| May 27, 2016 | 250 gal | Root Intrusion | — | Unpaved surface |
| May 20, 2016 | 150 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 24, 2016 | 100 gal | Grease / FOG | — | Building or Structure |
| Feb 16, 2016 | 80 gal | Grease / FOG | — | Other (specify below) |
| Feb 4, 2016 | 10 gal | Root Intrusion | — | Street/Curb and Gutter |
| Dec 22, 2015 | 180 gal | Root Intrusion | — | Unpaved surface |
| Dec 16, 2015 | 200 gal | Equipment Failure | — | Street/Curb and Gutter |
| Dec 2, 2015 | 150 gal | Root Intrusion | — | Street/Curb and Gutter |
| Dec 1, 2015 | 10 gal | Other / Unknown | — | Street/Curb and Gutter |
| Nov 30, 2015 | 75 gal | Root Intrusion | — | Unpaved surface |
| Nov 18, 2015 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Nov 12, 2015 | 5 gal | Root Intrusion | — | Paved Surface |
| Nov 10, 2015 | 10 gal | Root Intrusion | — | Street/Curb and Gutter |
| Aug 19, 2015 | 150 gal | Root Intrusion | — | Street/Curb and Gutter |
| May 20, 2015 | 150 gal | Grease / FOG | — | Street/Curb and Gutter |
| Feb 19, 2015 | 100 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 15, 2015 | 50 gal | Equipment Failure | — | Separate Storm Drain |
| Jan 22, 2015 | 7 gal | Other / Unknown | — | Street/Curb and Gutter |
| Dec 22, 2014 | 100 gal | Root Intrusion | — | Street/Curb and Gutter |
| Dec 15, 2014 | 2 gal | Other / Unknown | — | Building or Structure |
| Oct 20, 2014 | 500 gal | Equipment Failure | — | Separate Storm Drain |
| Oct 11, 2014 | 5 gal | Other / Unknown | — | Street/Curb and Gutter |
| Sep 26, 2014 | 30 gal | Grease / FOG | — | Drainage Channel;Street/Curb and Gutter |
| Sep 24, 2014 | 5 gal | Equipment Failure | — | Drainage Channel |
| Sep 19, 2014 | 3 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter |
| Sep 17, 2014 | 10 gal | Root Intrusion | Yes | Other (specify below) |
| Aug 28, 2014 | 10 gal | Root Intrusion | — | Other (specify below) |
| Aug 26, 2014 | 30 gal | Grease / FOG | — | Separate Storm Drain |
| Aug 26, 2014 | 1 gal | Equipment Failure | — | Street/Curb and Gutter |
| Aug 26, 2014 | 5 gal | Root Intrusion | — | Street/Curb and Gutter |
| Aug 25, 2014 | 20 gal | Equipment Failure | — | Separate Storm Drain;Street/Curb and Gutter |
| Jun 29, 2014 | 2 gal | Root Intrusion | — | Paved Surface |
| Jun 6, 2014 | 25 gal | Equipment Failure | Yes | Surface Water |
| Jun 5, 2014 | 1 gal | Grease / FOG | — | Paved Surface |
| Jun 3, 2014 | 50 gal | Root Intrusion | — | Building or Structure |
| May 30, 2014 | 750 gal | Equipment Failure | Yes | Street/Curb and Gutter |
| May 15, 2014 | 150 gal | Other / Unknown | — | Street/Curb and Gutter |
| May 13, 2014 | 20 gal | Root Intrusion | Yes | Combined Storm Drain (Combined CS only) |
| May 11, 2014 | 1 gal | Equipment Failure | Yes | Surface Water |
| Apr 25, 2014 | 5 gal | Grease / FOG | — | Separate Storm Drain |
| Mar 1, 2014 | 20 gal | Equipment Failure | — | Unpaved surface |
| Jan 31, 2014 | 750 gal | Root Intrusion | Yes | Drainage Channel;Separate Storm Drain |
| Dec 19, 2013 | 200 gal | Equipment Failure | — | Drainage Channel;Paved Surface;Street/Curb and Gutter |
| Oct 11, 2013 | 30 gal | Grease / FOG | — | Drainage Channel;Separate Storm Drain;Street/Curb and Gutter |
| Sep 1, 2013 | 5 gal | Equipment Failure | — | Unpaved surface |
| Jul 9, 2013 | 60 gal | Other / Unknown | — | Street/curb and gutter |
| Apr 24, 2013 | 5 gal | Other / Unknown | — | Street/curb and gutter |
| Apr 2, 2013 | 100 gal | Root Intrusion | Yes | Street/curb and gutter |
| Apr 1, 2013 | 6 gal | Equipment Failure | — | Unpaved surface |
| Mar 22, 2013 | 400 gal | Equipment Failure | Yes | Combined storm drain (combined CS only) |
| Feb 22, 2013 | 300 gal | Other / Unknown | — | Separate storm drain |
| Jan 31, 2013 | 50 gal | Root Intrusion | — | Street/curb and gutter |
| Jan 18, 2013 | 100 gal | Equipment Failure | — | Other paved surface |
| Jan 8, 2013 | 25 gal | Equipment Failure | — | Street/curb and gutter |
| Jan 3, 2013 | 300 gal | Equipment Failure | — | Unpaved surface;Separate storm drain;Street/curb and gutter |
| Dec 14, 2012 | 50 gal | Equipment Failure | — | Street/curb and gutter |
| Oct 21, 2012 | 300 gal | Root Intrusion | — | Separate storm drain |
| Sep 18, 2012 | 500 gal | Equipment Failure | — | Separate storm drain |
| Sep 14, 2012 | 30 gal | Root Intrusion | — | Other (specify below) |
| Jul 21, 2012 | 10 gal | Equipment Failure | — | Separate storm drain |
| May 2, 2012 | 500 gal | Other / Unknown | — | Other (specify below) |
| Mar 15, 2012 | 14K gal | Other / Unknown | Yes | Surface water |
| Mar 14, 2012 | 11K gal | Other / Unknown | — | Separate storm drain |
| Jan 30, 2012 | 100 gal | Other / Unknown | — | Other paved surface;Separate storm drain;Street/curb and gutter |
| Jan 12, 2012 | 50 gal | Grease / FOG | — | Building or structure |
| Jan 6, 2012 | 20 gal | Equipment Failure | — | Unpaved surface |
| Nov 18, 2011 | 100 gal | Equipment Failure | — | Separate storm drain;Street/curb and gutter |
| Nov 16, 2011 | 100 gal | Root Intrusion | — | Separate storm drain |
| Oct 24, 2011 | 10 gal | Other / Unknown | — | Unpaved surface |
| Oct 21, 2011 | 100 gal | Root Intrusion | — | Separate storm drain |
| Jul 21, 2011 | 10 gal | Equipment Failure | — | Street/curb and gutter |
| Jul 21, 2011 | 30 gal | Other / Unknown | — | Unpaved surface |
| May 9, 2011 | 9K gal | Equipment Failure | Yes | Separate storm drain;Street/curb and gutter;Surface water |
| Apr 23, 2011 | 5 gal | Other / Unknown | — | Street/curb and gutter |
| Apr 17, 2011 | 4 gal | Other / Unknown | — | Street/curb and gutter |
| Apr 11, 2011 | 30 gal | Other / Unknown | Yes | Separate storm drain |
| Mar 24, 2011 | 50 gal | Root Intrusion | Yes | Separate storm drain;Street/curb and gutter;Surface water |
| Mar 23, 2011 | 30 gal | Equipment Failure | Yes | Separate storm drain;Street/curb and gutter |
| Mar 5, 2011 | 15 gal | Other / Unknown | — | Street/curb and gutter |
| Feb 27, 2011 | 1 gal | Equipment Failure | — | Street/curb and gutter |
| Feb 26, 2011 | 6 gal | Equipment Failure | — | Street/curb and gutter;Other (specify below) |
| Feb 15, 2011 | 50 gal | Other / Unknown | — | Street/curb and gutter |
| Jan 21, 2011 | 50 gal | Grease / FOG | — | Street/curb and gutter |
| Jan 20, 2011 | 60 gal | Grease / FOG | Yes | Separate storm drain |
| Jan 19, 2011 | 1K gal | Other / Unknown | — | Unpaved surface |
| Jan 6, 2011 | 3 gal | Other / Unknown | — | Unpaved surface;Other (specify below) |
| Jan 4, 2011 | 20 gal | Grease / FOG | — | Street/curb and gutter |
| Dec 20, 2010 | 50 gal | Root Intrusion | — | Street/curb and gutter |
| Dec 1, 2010 | 50 gal | Other / Unknown | — | Street/curb and gutter |
| Nov 17, 2010 | 20 gal | Grease / FOG | — | Separate storm drain;Street/curb and gutter |
| Nov 16, 2010 | 40 gal | Other / Unknown | — | Other paved surface;Street/curb and gutter |
| Aug 11, 2010 | 10 gal | Other / Unknown | — | Other paved surface |
| Aug 5, 2010 | 100 gal | Other / Unknown | — | Other paved surface;Separate storm drain |
| Jul 20, 2010 | 15 gal | Other / Unknown | — | Other (specify below) |
| Jul 9, 2010 | 50 gal | Root Intrusion | — | Street/curb and gutter |
| Jun 18, 2010 | 5 gal | Other / Unknown | Yes | Street/curb and gutter |
| Jun 15, 2010 | 1K gal | Equipment Failure | Yes | Surface water |
| Jun 14, 2010 | 50 gal | Other / Unknown | — | Storm drain |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.