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California · California (CIWQS)
Tamalpais Community San Dist
B
Seldom reaches water
Reported events
86
Total volume
84K gal
Reached waterways
10 (12%)
Reporting since
2007
What caused the overflows
Root Intrusion
43
Equipment Failure
19
Other / Unknown
16
Grease / FOG
8
Reported overflow events (showing 86 of 86)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Apr 18, 2026 | 114 gal | Root Intrusion | — | — |
| Aug 24, 2024 | 315 gal | Root Intrusion | — | — |
| Dec 30, 2023 | 113 gal | Other / Unknown | — | — |
| Dec 26, 2023 | 203 gal | Grease / FOG | — | — |
| Jul 18, 2023 | 102 gal | Equipment Failure | — | — |
| Feb 23, 2023 | 74 gal | Root Intrusion | — | Other (specify below);Unpaved surface |
| Jun 7, 2022 | 212 gal | Other / Unknown | — | Street/Curb and Gutter |
| Feb 10, 2022 | 39 gal | Root Intrusion | — | Street/Curb and Gutter |
| Aug 9, 2021 | 238 gal | Root Intrusion | — | Other (specify below) |
| May 15, 2021 | 38 gal | Other / Unknown | — | Street/Curb and Gutter;Unpaved surface |
| Apr 3, 2021 | 254 gal | Equipment Failure | — | Other (specify below);Paved Surface;Unpaved surface |
| Mar 7, 2021 | 213 gal | Root Intrusion | — | Other (specify below);Unpaved surface |
| Feb 20, 2021 | 382 gal | Equipment Failure | — | Other (specify below);Unpaved surface |
| Aug 26, 2020 | 20 gal | Equipment Failure | — | Other (specify below) |
| Jun 3, 2020 | 92 gal | Other / Unknown | — | Other (specify below);Street/Curb and Gutter |
| May 23, 2020 | 520 gal | Equipment Failure | — | Other (specify below);Unpaved surface |
| Dec 26, 2019 | 236 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Dec 15, 2019 | 825 gal | Other / Unknown | Yes | Other (specify below) |
| Dec 5, 2019 | 234 gal | Grease / FOG | Yes | Drainage Channel;Unpaved surface |
| Oct 26, 2019 | 616 gal | Root Intrusion | — | Other (specify below);Paved Surface;Unpaved surface |
| Sep 28, 2019 | 108 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Apr 18, 2019 | 80 gal | Root Intrusion | — | Unpaved surface |
| Mar 16, 2019 | 426 gal | Other / Unknown | — | Other (specify below) |
| Mar 12, 2019 | 150 gal | Other / Unknown | Yes | Other (specify below);Paved Surface;Separate Storm Drain;Unpaved surface |
| Mar 3, 2019 | 720 gal | Root Intrusion | — | Other (specify below) |
| Jun 24, 2018 | 166 gal | Other / Unknown | Yes | Separate Storm Drain;Street/Curb and Gutter |
| May 10, 2018 | 131 gal | Root Intrusion | — | Other (specify below) |
| Mar 19, 2018 | 100 gal | Root Intrusion | — | Other (specify below);Paved Surface |
| Aug 30, 2017 | 100 gal | Equipment Failure | — | Unpaved surface |
| Jun 22, 2017 | 150 gal | Root Intrusion | — | Unpaved surface |
| May 15, 2017 | 125 gal | Equipment Failure | — | Unpaved surface |
| Apr 12, 2017 | 900 gal | Root Intrusion | — | Unpaved surface |
| Feb 18, 2017 | 750 gal | Root Intrusion | — | Unpaved surface |
| Jan 14, 2017 | 1K gal | Equipment Failure | Yes | Drainage Channel |
| Nov 23, 2016 | 100 gal | Equipment Failure | — | Unpaved surface |
| May 14, 2016 | 400 gal | Grease / FOG | — | Unpaved surface |
| Apr 30, 2016 | 180 gal | Equipment Failure | — | Unpaved surface |
| Mar 10, 2016 | 64K gal | Root Intrusion | Yes | Building or Structure;Paved Surface;Surface Water |
| Feb 4, 2016 | 450 gal | Root Intrusion | — | Unpaved surface |
| Jan 4, 2016 | 40 gal | Equipment Failure | — | Unpaved surface |
| May 1, 2015 | 50 gal | Equipment Failure | — | Separate Storm Drain;Unpaved surface |
| Jan 16, 2015 | 150 gal | Root Intrusion | — | Unpaved surface |
| Dec 10, 2014 | 450 gal | Root Intrusion | — | Other (specify below);Unpaved surface |
| Sep 28, 2014 | 100 gal | Equipment Failure | — | Unpaved surface |
| Jul 15, 2014 | 300 gal | Equipment Failure | — | Unpaved surface |
| Jun 19, 2014 | 950 gal | Equipment Failure | Yes | Other (specify below) |
| Apr 12, 2014 | 30 gal | Root Intrusion | — | Unpaved surface |
| Mar 29, 2014 | 100 gal | Grease / FOG | — | Unpaved surface |
| Nov 23, 2013 | 400 gal | Root Intrusion | — | Unpaved surface |
| May 27, 2013 | 300 gal | Other / Unknown | — | Unpaved surface |
| Apr 7, 2013 | 100 gal | Root Intrusion | — | Unpaved surface |
| Apr 1, 2013 | 40 gal | Other / Unknown | — | Unpaved surface |
| Jan 8, 2013 | 150 gal | Root Intrusion | — | Unpaved surface |
| Nov 13, 2012 | 50 gal | Root Intrusion | — | Unpaved surface |
| Nov 6, 2012 | 100 gal | Other / Unknown | — | Other paved surface;Unpaved surface |
| Oct 16, 2012 | 150 gal | Root Intrusion | — | Unpaved surface |
| Sep 7, 2012 | 50 gal | Grease / FOG | — | Unpaved surface |
| Aug 22, 2012 | 150 gal | Other / Unknown | — | Unpaved surface |
| May 1, 2012 | 50 gal | Root Intrusion | — | Unpaved surface |
| Apr 1, 2012 | 50 gal | Other / Unknown | — | Unpaved surface |
| Jan 25, 2012 | 150 gal | Root Intrusion | — | Other paved surface |
| Jul 16, 2011 | 450 gal | Root Intrusion | — | Unpaved surface |
| Mar 24, 2011 | 3K gal | Equipment Failure | Yes | Surface water |
| Mar 8, 2011 | 200 gal | Grease / FOG | — | Unpaved surface |
| Feb 26, 2011 | 100 gal | Grease / FOG | — | Unpaved surface |
| Jan 11, 2011 | 15 gal | Root Intrusion | — | Unpaved surface |
| Nov 8, 2010 | 5 gal | Other / Unknown | — | Unpaved surface |
| Jun 15, 2010 | 250 gal | Grease / FOG | — | Unpaved surface |
| Mar 10, 2010 | 50 gal | Root Intrusion | — | Unpaved surface |
| Mar 3, 2010 | 25 gal | Root Intrusion | — | Unpaved surface |
| Oct 23, 2009 | 25 gal | Root Intrusion | — | Other paved surface |
| Oct 2, 2009 | 20 gal | Other / Unknown | — | Separate storm drain |
| Jun 17, 2009 | 400 gal | Other / Unknown | Yes | Other (specify below) |
| Mar 13, 2009 | 200 gal | Root Intrusion | Yes | Separate storm drain |
| Feb 2, 2009 | 50 gal | Root Intrusion | — | Unpaved surface |
| Jan 26, 2009 | 100 gal | Root Intrusion | — | Unpaved surface |
| Nov 11, 2008 | 20 gal | Root Intrusion | — | Unpaved surface |
| Oct 10, 2008 | 10 gal | Root Intrusion | — | Unpaved surface |
| Aug 28, 2008 | 200 gal | Equipment Failure | — | Unpaved surface |
| Aug 5, 2008 | 25 gal | Root Intrusion | — | Unpaved surface |
| Jun 3, 2008 | 50 gal | Root Intrusion | — | Unpaved surface |
| May 5, 2008 | 100 gal | Equipment Failure | — | Unpaved surface |
| Mar 29, 2008 | 210 gal | Root Intrusion | — | Unpaved surface |
| Dec 10, 2007 | 100 gal | Root Intrusion | — | Unpaved surface |
| Nov 29, 2007 | 25 gal | Root Intrusion | — | Unpaved surface |
| Aug 19, 2007 | 100 gal | Equipment Failure | — | Unpaved surface |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.