All rankings
California · California (CIWQS)
Lake Arrowhead Community Services District
B
Seldom reaches water
Reported events
274
Total volume
149K gal
Reached waterways
30 (11%)
Reporting since
2007
What caused the overflows
Root Intrusion
189
Other / Unknown
41
Equipment Failure
25
Grease / FOG
19
Reported overflow events (showing 200 of 274)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Apr 6, 2026 | 300 gal | Root Intrusion | Yes | Grass Valley Lake |
| Apr 6, 2026 | 300 gal | Root Intrusion | — | Grass Valley Lake |
| Oct 23, 2025 | 300 gal | Equipment Failure | — | — |
| May 1, 2023 | 50 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| May 1, 2023 | 15 gal | Root Intrusion | — | Unpaved surface |
| Apr 2, 2023 | 400 gal | Grease / FOG | — | Unpaved surface |
| Dec 25, 2022 | 250 gal | Equipment Failure | — | Paved Surface |
| Nov 9, 2022 | 21K gal | Other / Unknown | — | Unpaved surface |
| Sep 24, 2022 | 100 gal | Other / Unknown | — | Unpaved surface |
| Apr 10, 2022 | 40 gal | Root Intrusion | — | Unpaved surface |
| Apr 7, 2022 | 30 gal | Root Intrusion | — | Unpaved surface |
| Oct 2, 2021 | 121 gal | Root Intrusion | — | Unpaved surface |
| Jul 14, 2021 | 3K gal | Other / Unknown | Yes | Drainage Channel;Surface Water;Unpaved surface |
| Apr 7, 2021 | 10 gal | Equipment Failure | — | Unpaved surface |
| Mar 19, 2021 | 50 gal | Root Intrusion | — | Paved Surface |
| Jul 9, 2020 | 30 gal | Root Intrusion | — | Paved Surface |
| Jun 12, 2020 | 40 gal | Root Intrusion | — | Unpaved surface |
| Sep 10, 2019 | 50 gal | Root Intrusion | — | Unpaved surface |
| Sep 10, 2019 | 600 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Jul 25, 2019 | 30 gal | Equipment Failure | — | Unpaved surface |
| Jul 15, 2019 | 40 gal | Root Intrusion | — | Unpaved surface |
| Jun 21, 2019 | 6K gal | Equipment Failure | — | Paved Surface;Unpaved surface |
| Mar 24, 2019 | 100 gal | Root Intrusion | — | Street/Curb and Gutter;Unpaved surface |
| Feb 14, 2019 | 18K gal | Other / Unknown | Yes | Paved Surface;Surface Water;Unpaved surface |
| Feb 14, 2019 | 20K gal | Equipment Failure | Yes | Other (specify below) |
| Feb 9, 2019 | 45 gal | Root Intrusion | — | Paved Surface |
| Jan 24, 2019 | 30 gal | Root Intrusion | — | Unpaved surface |
| Jan 14, 2019 | 20 gal | Root Intrusion | — | Unpaved surface |
| Dec 28, 2018 | 30 gal | Root Intrusion | — | Paved Surface |
| Nov 23, 2018 | 30 gal | Equipment Failure | — | Paved Surface |
| Nov 19, 2018 | 75 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Aug 4, 2018 | 50 gal | Root Intrusion | — | Paved Surface |
| Jul 30, 2018 | 175 gal | Root Intrusion | — | Unpaved surface |
| Jul 5, 2018 | 75 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| May 6, 2018 | 5 gal | Root Intrusion | — | Unpaved surface |
| Apr 9, 2018 | 50 gal | Root Intrusion | — | Building or Structure |
| Apr 8, 2018 | 20 gal | Root Intrusion | — | Unpaved surface |
| Mar 13, 2018 | 200 gal | Root Intrusion | — | Building or Structure |
| Feb 2, 2018 | 20 gal | Root Intrusion | — | Paved Surface |
| Jan 7, 2018 | 40 gal | Root Intrusion | — | Unpaved surface |
| Jan 1, 2018 | 40 gal | Equipment Failure | — | Paved Surface |
| Dec 26, 2017 | 75 gal | Root Intrusion | — | Paved Surface |
| Nov 7, 2017 | 80 gal | Root Intrusion | — | Paved Surface |
| Oct 5, 2017 | 45 gal | Root Intrusion | — | Paved Surface |
| Apr 24, 2017 | 100 gal | Root Intrusion | — | Unpaved surface |
| Mar 1, 2017 | 100 gal | Root Intrusion | — | Paved Surface |
| Feb 8, 2017 | 50 gal | Root Intrusion | — | Unpaved surface |
| Feb 7, 2017 | 250 gal | Root Intrusion | — | Unpaved surface |
| Jan 23, 2017 | 50 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Nov 14, 2016 | 40 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Sep 23, 2016 | 20 gal | Root Intrusion | — | Paved Surface |
| Sep 19, 2016 | 15 gal | Root Intrusion | — | Unpaved surface |
| Sep 3, 2016 | 15 gal | Root Intrusion | — | Paved Surface |
| Aug 16, 2016 | 30 gal | Root Intrusion | — | Unpaved surface |
| Jul 7, 2016 | 150 gal | Equipment Failure | — | Unpaved surface |
| Jun 30, 2016 | 30 gal | Root Intrusion | — | Unpaved surface |
| May 28, 2016 | 5 gal | Root Intrusion | — | Unpaved surface |
| May 21, 2016 | 10 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| May 8, 2016 | 50 gal | Root Intrusion | — | Unpaved surface |
| May 7, 2016 | 10 gal | Root Intrusion | — | Paved Surface |
| May 4, 2016 | 75 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter;Unpaved surface |
| Mar 1, 2016 | 50 gal | Other / Unknown | — | Unpaved surface |
| Feb 17, 2016 | 30 gal | Root Intrusion | — | Unpaved surface |
| Jan 26, 2016 | 2K gal | Equipment Failure | Yes | Paved Surface;Separate Storm Drain;Unpaved surface |
| Dec 21, 2015 | 15 gal | Root Intrusion | — | Unpaved surface |
| Dec 8, 2015 | 35 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Dec 4, 2015 | 75 gal | Root Intrusion | — | Paved Surface |
| Oct 25, 2015 | 400 gal | Equipment Failure | — | Paved Surface;Unpaved surface |
| Aug 28, 2015 | 500 gal | Root Intrusion | — | Unpaved surface |
| Aug 16, 2015 | 100 gal | Root Intrusion | — | Unpaved surface |
| Aug 6, 2015 | 30 gal | Root Intrusion | — | Unpaved surface |
| Jul 28, 2015 | 200 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Jul 2, 2015 | 75 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Jun 8, 2015 | 40 gal | Root Intrusion | — | Paved Surface |
| May 31, 2015 | 20 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Apr 26, 2015 | 5 gal | Root Intrusion | — | Paved Surface |
| Apr 15, 2015 | 30 gal | Root Intrusion | — | Paved Surface |
| Mar 29, 2015 | 75 gal | Root Intrusion | — | Paved Surface |
| Mar 25, 2015 | 80 gal | Equipment Failure | — | Paved Surface |
| Mar 17, 2015 | 55 gal | Root Intrusion | — | Unpaved surface |
| Mar 3, 2015 | 160 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Feb 5, 2015 | 15 gal | Root Intrusion | — | Unpaved surface |
| Jan 17, 2015 | 150 gal | Root Intrusion | — | Drainage Channel;Unpaved surface |
| Jan 12, 2015 | 600 gal | Root Intrusion | Yes | Drainage Channel;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water |
| Jan 10, 2015 | 1 gal | Equipment Failure | — | Paved Surface |
| Jan 7, 2015 | 40 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Jan 7, 2015 | 200 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Dec 1, 2014 | 50 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Nov 22, 2014 | 75 gal | Root Intrusion | — | Drainage Channel;Paved Surface;Street/Curb and Gutter |
| Oct 12, 2014 | 70 gal | Root Intrusion | — | Paved Surface |
| Oct 6, 2014 | 200 gal | Grease / FOG | — | Paved Surface |
| Aug 15, 2014 | 30 gal | Root Intrusion | — | Unpaved surface |
| Jul 19, 2014 | 5 gal | Root Intrusion | — | Building or Structure;Unpaved surface |
| Jul 12, 2014 | 1K gal | Equipment Failure | — | Unpaved surface |
| Jul 9, 2014 | 20 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| Jul 1, 2014 | 40 gal | Root Intrusion | — | Paved Surface |
| May 29, 2014 | 30 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| May 3, 2014 | 60 gal | Root Intrusion | — | Paved Surface;Unpaved surface |
| May 2, 2014 | 15 gal | Root Intrusion | — | Unpaved surface |
| May 1, 2014 | 4K gal | Grease / FOG | Yes | Drainage Channel |
| Apr 13, 2014 | 30 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter |
| Apr 9, 2014 | 35 gal | Root Intrusion | — | Unpaved surface |
| Mar 15, 2014 | 41 gal | Root Intrusion | — | Paved Surface;Separate Storm Drain;Unpaved surface |
| Mar 12, 2014 | 5 gal | Root Intrusion | — | Paved Surface |
| Mar 10, 2014 | 20 gal | Grease / FOG | — | Paved Surface;Separate Storm Drain;Street/Curb and Gutter |
| Feb 5, 2014 | 5 gal | Root Intrusion | — | Unpaved surface |
| Jan 2, 2014 | 20 gal | Root Intrusion | — | Unpaved surface |
| Dec 16, 2013 | 25 gal | Root Intrusion | — | Unpaved surface |
| Dec 3, 2013 | 20 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Nov 8, 2013 | 1K gal | Root Intrusion | — | Paved Surface;Separate Storm Drain;Street/Curb and Gutter |
| Sep 8, 2013 | 10 gal | Root Intrusion | — | Unpaved surface |
| Aug 18, 2013 | 30 gal | Root Intrusion | — | Other paved surface |
| Aug 2, 2013 | 120 gal | Root Intrusion | — | Unpaved surface |
| Jul 7, 2013 | 150 gal | Root Intrusion | — | Unpaved surface |
| Jul 6, 2013 | 40 gal | Root Intrusion | — | Other (specify below) |
| Jul 3, 2013 | 20 gal | Root Intrusion | — | Street/curb and gutter |
| Jun 18, 2013 | 750 gal | Root Intrusion | — | Street/curb and gutter;Unpaved surface |
| Apr 26, 2013 | 135 gal | Other / Unknown | Yes | Surface water |
| Apr 10, 2013 | 50 gal | Root Intrusion | — | Other paved surface;Street/curb and gutter;Unpaved surface |
| Mar 13, 2013 | 10 gal | Root Intrusion | — | Unpaved surface |
| Mar 13, 2013 | 40 gal | Root Intrusion | — | Unpaved surface |
| Feb 8, 2013 | 40 gal | Root Intrusion | — | Unpaved surface |
| Feb 4, 2013 | 50 gal | Other / Unknown | — | Street/curb and gutter;Unpaved surface |
| Jan 3, 2013 | 50 gal | Grease / FOG | — | Unpaved surface |
| Dec 31, 2012 | 150 gal | Root Intrusion | — | Building or structure |
| Dec 23, 2012 | 750 gal | Root Intrusion | — | Street/curb and gutter;Unpaved surface |
| Oct 28, 2012 | 10 gal | Root Intrusion | — | Unpaved surface |
| Oct 14, 2012 | 1 gal | Root Intrusion | — | Unpaved surface |
| Sep 18, 2012 | 300 gal | Root Intrusion | — | Unpaved surface |
| Sep 15, 2012 | 550 gal | Equipment Failure | — | Building or structure;Unpaved surface |
| Sep 11, 2012 | 10 gal | Other / Unknown | — | Unpaved surface |
| Aug 1, 2012 | 20 gal | Root Intrusion | — | Unpaved surface |
| Jul 17, 2012 | 10 gal | Root Intrusion | — | Unpaved surface |
| Jul 5, 2012 | 5 gal | Root Intrusion | — | Unpaved surface |
| Jun 7, 2012 | 20 gal | Root Intrusion | — | Unpaved surface |
| Jun 1, 2012 | 388 gal | Grease / FOG | — | Other paved surface |
| May 15, 2012 | 25 gal | Root Intrusion | — | Unpaved surface |
| Mar 4, 2012 | 1K gal | Root Intrusion | Yes | Surface water |
| Feb 21, 2012 | 18K gal | Other / Unknown | Yes | Surface water |
| Jan 30, 2012 | 10 gal | Root Intrusion | — | Unpaved surface |
| Dec 30, 2011 | 25 gal | Other / Unknown | — | Other paved surface |
| Dec 23, 2011 | 5 gal | Root Intrusion | — | Other paved surface |
| Dec 14, 2011 | 350 gal | Root Intrusion | Yes | Surface water |
| Dec 7, 2011 | 40 gal | Other / Unknown | — | Unpaved surface |
| Dec 7, 2011 | 10 gal | Other / Unknown | — | Unpaved surface |
| Nov 25, 2011 | 1K gal | Grease / FOG | Yes | Surface water;Unpaved surface |
| Nov 8, 2011 | 10 gal | Other / Unknown | Yes | Surface water |
| Oct 27, 2011 | 10 gal | Other / Unknown | — | Unpaved surface |
| Oct 23, 2011 | 20 gal | Root Intrusion | — | Unpaved surface |
| Jul 30, 2011 | 100 gal | Root Intrusion | — | Unpaved surface |
| Jul 17, 2011 | 25 gal | Other / Unknown | — | Unpaved surface |
| Jun 30, 2011 | 25 gal | Equipment Failure | — | Unpaved surface |
| Jun 9, 2011 | 1 gal | Root Intrusion | — | Unpaved surface |
| Jun 1, 2011 | 35 gal | Other / Unknown | — | Unpaved surface |
| May 20, 2011 | 10 gal | Other / Unknown | — | Other paved surface |
| May 13, 2011 | 50 gal | Other / Unknown | — | Other paved surface;Unpaved surface |
| May 4, 2011 | 30 gal | Other / Unknown | — | Unpaved surface |
| Apr 24, 2011 | 40 gal | Root Intrusion | Yes | Separate storm drain;Unpaved surface |
| Apr 23, 2011 | 1 gal | Root Intrusion | — | Other paved surface |
| Apr 22, 2011 | 25 gal | Root Intrusion | — | Unpaved surface |
| Apr 14, 2011 | 40 gal | Root Intrusion | — | Other paved surface |
| Apr 13, 2011 | 5 gal | Root Intrusion | — | Other paved surface |
| Apr 13, 2011 | 5 gal | Root Intrusion | — | Other paved surface |
| Apr 7, 2011 | 20 gal | Root Intrusion | — | Other paved surface |
| Apr 7, 2011 | 20 gal | Root Intrusion | — | Other paved surface |
| Apr 2, 2011 | 25 gal | Root Intrusion | — | Other paved surface;Unpaved surface |
| Apr 1, 2011 | 50 gal | Other / Unknown | — | Unpaved surface |
| Mar 15, 2011 | 150 gal | Root Intrusion | — | Unpaved surface |
| Mar 14, 2011 | 90 gal | Equipment Failure | Yes | Surface water |
| Mar 5, 2011 | 3 gal | Root Intrusion | — | Unpaved surface |
| Feb 17, 2011 | 300 gal | Other / Unknown | Yes | Street/curb and gutter;Surface water |
| Feb 14, 2011 | 80 gal | Root Intrusion | Yes | Unpaved surface |
| Feb 9, 2011 | 10 gal | Root Intrusion | — | Unpaved surface |
| Jan 22, 2011 | 50 gal | Root Intrusion | — | Unpaved surface |
| Jan 22, 2011 | 20 gal | Other / Unknown | — | Unpaved surface |
| Jan 17, 2011 | 20 gal | Root Intrusion | — | Unpaved surface |
| Jan 1, 2011 | 20 gal | Root Intrusion | — | Other paved surface |
| Dec 31, 2010 | 50 gal | Root Intrusion | — | Other paved surface |
| Dec 25, 2010 | 30 gal | Other / Unknown | — | Unpaved surface |
| Dec 22, 2010 | 23K gal | Other / Unknown | Yes | Other (specify below) |
| Dec 8, 2010 | 500 gal | Root Intrusion | Yes | Unpaved surface |
| Dec 7, 2010 | 60 gal | Other / Unknown | Yes | Other paved surface;Separate storm drain;Street/curb and gutter;Surface water |
| Nov 1, 2010 | 2 gal | Other / Unknown | — | Other paved surface |
| Oct 26, 2010 | 10 gal | Grease / FOG | — | Other paved surface |
| Oct 2, 2010 | 15 gal | Root Intrusion | Yes | Unpaved surface |
| Aug 22, 2010 | 60 gal | Other / Unknown | — | Other paved surface |
| Jul 30, 2010 | 50 gal | Root Intrusion | — | Street/curb and gutter |
| Jul 12, 2010 | 30 gal | Other / Unknown | — | Other paved surface |
| Jul 6, 2010 | 20 gal | Root Intrusion | — | Unpaved surface |
| Jun 18, 2010 | 8 gal | Other / Unknown | — | Other paved surface |
| Jun 15, 2010 | 5 gal | Equipment Failure | — | Unpaved surface |
| Jun 14, 2010 | 40 gal | Other / Unknown | — | Unpaved surface |
| Jun 5, 2010 | 4 gal | Grease / FOG | — | Unpaved surface |
| May 31, 2010 | 30 gal | Root Intrusion | — | Unpaved surface |
| May 29, 2010 | 3 gal | Root Intrusion | — | Unpaved surface |
| May 2, 2010 | 25 gal | Root Intrusion | — | Unpaved surface |
| Apr 19, 2010 | 5 gal | Root Intrusion | — | Unpaved surface |
| Apr 13, 2010 | 10 gal | Root Intrusion | — | Unpaved surface |
| Apr 9, 2010 | 4 gal | Root Intrusion | — | Unpaved surface |
| Apr 7, 2010 | 2 gal | Root Intrusion | — | Unpaved surface |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.