All rankings
California · California (CIWQS)

UC Los Angeles

C
Often reaches water
Reported events
120
Total volume
169K gal
Reached waterways
25 (21%)
Reporting since
2007

What caused the overflows

Equipment Failure
50
Other / Unknown
43
Root Intrusion
25
Grease / FOG
2

Reported overflow events (showing 120 of 120)

DateVolumeCauseReached waterReceiving water
Jan 28, 2026500 galRoot Intrusion——
Jan 15, 2026800 galRoot Intrusion——
Jan 7, 202660 galRoot IntrusionYesBallona Water Creek
Oct 3, 202555 galEquipment Failure——
Feb 3, 2025300 galOther / UnknownYesBallona Creek
Sep 29, 20242K galOther / UnknownYesBallona Creek
Feb 28, 202355 galEquipment Failure—Building or Structure
Sep 30, 2022200 galEquipment Failure—Building or Structure
Sep 30, 202250 galEquipment Failure—Building or Structure
Sep 29, 202225 galEquipment Failure—Building or Structure
Sep 27, 202250 galEquipment Failure—Building or Structure
Sep 26, 202260 galEquipment Failure—Building or Structure
Sep 23, 202275 galEquipment Failure—Building or Structure
Feb 24, 20222 galEquipment Failure—Building or Structure
Jan 31, 20228 galEquipment Failure—Building or Structure
Jan 21, 20225 galEquipment Failure—Building or Structure
Oct 15, 20212K galEquipment Failure—Building or Structure
Nov 11, 2020200 galEquipment Failure—Building or Structure
Jul 14, 202020 galEquipment Failure—Building or Structure
Feb 25, 2020150 galEquipment Failure—Building or Structure
Feb 19, 202030 galOther / UnknownYesPaved Surface;Separate Storm Drain
Jan 13, 202020 galEquipment Failure—Building or Structure
Dec 12, 2019100 galEquipment Failure—Building or Structure
Dec 11, 201950 galEquipment Failure—Building or Structure
Oct 14, 2019400 galRoot IntrusionYesSeparate Storm Drain
Sep 6, 2019200 galOther / Unknown—Building or Structure
Jul 27, 20193K galEquipment FailureYesBuilding or Structure;Separate Storm Drain
Jun 27, 201975 galEquipment Failure—Building or Structure
May 17, 2019100 galEquipment Failure—Building or Structure
Feb 19, 2019125 galOther / Unknown—Building or Structure
Jan 17, 201950 galOther / Unknown—Building or Structure
Jan 8, 201915 galOther / Unknown—Building or Structure
Dec 8, 20183 galEquipment Failure—Building or Structure
Nov 29, 20185 galEquipment Failure—Building or Structure
Nov 15, 2018100 galEquipment Failure—Building or Structure
Nov 1, 201815 galOther / Unknown—Building or Structure
Oct 18, 201815 galOther / Unknown—Building or Structure
Oct 4, 201815 galEquipment Failure—Building or Structure
Sep 4, 2018200 galRoot Intrusion—Building or Structure
Aug 27, 2018100 galRoot Intrusion—Building or Structure
Jun 12, 2018120 galOther / Unknown—Building or Structure
Jun 6, 2018125 galEquipment Failure—Building or Structure
May 30, 201810 galEquipment Failure—Building or Structure
May 21, 201815 galEquipment Failure—Building or Structure
May 9, 201850 galEquipment Failure—Building or Structure
May 4, 201815 galOther / Unknown—Building or Structure
Apr 23, 20183 galOther / Unknown—Building or Structure
Apr 8, 20185 galEquipment Failure—Unpaved surface
Mar 14, 2018100 galOther / Unknown—Drainage Channel;Paved Surface
Feb 28, 2018260 galEquipment FailureYesDrainage Channel
Nov 11, 201725 galEquipment Failure—Building or Structure
Nov 1, 2017100 galEquipment Failure—Separate Storm Drain
Jul 8, 2017275 galOther / Unknown—Building or Structure
Mar 17, 2017100 galEquipment Failure—Building or Structure
Nov 16, 2016500 galOther / Unknown—Building or Structure
Apr 26, 201655 galEquipment Failure—Building or Structure
Mar 2, 2016600 galOther / Unknown—Building or Structure
Feb 2, 201650 galGrease / FOG—Building or Structure
Oct 22, 20155 galOther / Unknown—Building or Structure
Sep 11, 2015200 galOther / Unknown—Building or Structure
Aug 28, 201530 galOther / Unknown—Building or Structure
Aug 10, 20153 galOther / Unknown—Building or Structure
Jul 27, 201550 galRoot Intrusion—Building or Structure;Other (specify below)
May 28, 2015100 galEquipment Failure—Building or Structure
May 5, 201520 galOther / Unknown—Building or Structure
Apr 28, 20152K galEquipment Failure—Paved Surface
Mar 23, 201530 galEquipment FailureYesPaved Surface;Separate Storm Drain
Feb 17, 201530 galOther / Unknown—Building or Structure
Feb 13, 201515 galOther / Unknown—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 8, 2015100 galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
Dec 21, 201420 galRoot Intrusion—Paved Surface
Dec 12, 201425 galOther / Unknown—Building or Structure
Nov 20, 201430 galOther / Unknown—Building or Structure
Oct 9, 201415 galOther / Unknown—Other (specify below);Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Sep 23, 2014200 galRoot IntrusionYesPaved Surface;Separate Storm Drain
Jun 30, 201430 galRoot Intrusion—Building or Structure
Jun 24, 20141K galOther / UnknownYesOther (specify below)
Jun 7, 2014110 galOther / Unknown—Building or Structure
Jun 2, 201415 galEquipment Failure—Building or Structure
May 27, 201460 galOther / Unknown—Building or Structure
Apr 16, 201460 galOther / Unknown—Building or Structure
Apr 3, 20143 galRoot Intrusion—Building or Structure
Mar 19, 20141K galRoot IntrusionYesBuilding or Structure;Separate Storm Drain
Mar 18, 201430 galRoot Intrusion—Building or Structure
Feb 19, 201412 galGrease / FOG—Building or Structure
Feb 13, 2014100 galEquipment Failure—Building or Structure
Feb 5, 201450 galEquipment Failure—Building or Structure
Jan 30, 2014100 galEquipment Failure—Building or Structure
Jan 14, 2014150 galEquipment Failure—Other (specify below)
Dec 10, 2013200 galRoot Intrusion—Other (specify below)
Nov 5, 2013180 galRoot Intrusion—Building or Structure
Nov 1, 2013200 galRoot Intrusion—Building or Structure
Oct 21, 2013110 galRoot Intrusion—Building or Structure
Oct 20, 20134K galEquipment FailureYesBuilding or Structure;Separate Storm Drain
Oct 18, 201350 galEquipment FailureYesPaved Surface;Separate Storm Drain
Oct 15, 201347 galRoot Intrusion—Paved Surface
Sep 19, 2013200 galRoot Intrusion—Drainage Channel;Paved Surface;Street/Curb and Gutter
Sep 16, 201340 galOther / Unknown—Building or Structure
Aug 14, 201320 galOther / Unknown—Building or structure
Jun 27, 20135 galOther / Unknown—Building or structure
May 14, 2013500 galOther / UnknownYesSurface Water;Separate storm drain
Mar 19, 2013100 galOther / Unknown—Building or structure
Mar 13, 201325 galOther / UnknownYesOther (specify below)
Mar 11, 201335 galRoot Intrusion—Other paved surface;Unpaved surface
Mar 5, 201370 galRoot Intrusion—Building or structure;Other paved surface
Feb 4, 201340 galRoot IntrusionYesOther (specify below)
Dec 11, 2012100 galEquipment Failure—Other (specify below)
Dec 10, 2012700 galOther / Unknown—Other (specify below)
Jan 1, 2012112K galEquipment Failure—Building or structure;Unpaved surface;Other (specify below)
Dec 2, 2011500 galOther / UnknownYesSeparate storm drain
Sep 18, 20111K galRoot IntrusionYesSeparate storm drain
Sep 7, 2010500 galOther / UnknownYesStreet/Curb and Gutter;Separate storm drain
Jul 6, 2010500 galOther / Unknown—Separate storm drain;Street/curb and gutter
Oct 22, 2009900 galOther / Unknown—Building or structure
Jun 30, 20087K galOther / UnknownYesOther (specify below)
Jun 11, 20083K galEquipment FailureYesSeparate storm drain
Oct 2, 20071K galOther / UnknownYesSeparate storm drain
May 21, 2007800 galEquipment Failure—Building or structure
Feb 14, 200714K galEquipment FailureYesSeparate storm drain
Feb 5, 20072K galRoot IntrusionYesSeparate storm drain

Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.