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California · California (CIWQS)

Biology Field Station

A
Rarely reaches water
Reported events
73
Total volume
13K gal
Reached waterways
2 (3%)
Reporting since
2007

What caused the overflows

Equipment Failure
29
Root Intrusion
23
Other / Unknown
21

Reported overflow events (showing 73 of 73)

DateVolumeCauseReached waterReceiving water
Jan 13, 2026150 galEquipment Failure——
Feb 13, 202340 galEquipment Failure—Unpaved surface
Feb 7, 202330 galEquipment Failure—Paved Surface;Unpaved surface
Feb 1, 202310 galEquipment Failure—Combined Storm Drain (Combined CS only);Paved Surface
Oct 14, 2022100 galRoot Intrusion—Unpaved surface
Dec 12, 202120 galEquipment Failure—Unpaved surface
Jun 24, 20201 galRoot Intrusion—Unpaved surface
May 19, 202070 galEquipment Failure—Unpaved surface
Apr 15, 202080 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Aug 8, 20195 galEquipment Failure—Unpaved surface
Mar 6, 2019300 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Dec 1, 201821 galEquipment Failure—Unpaved surface
Sep 28, 2018100 galRoot Intrusion—Paved Surface;Street/Curb and Gutter;Unpaved surface
Sep 4, 201840 galRoot Intrusion—Paved Surface;Unpaved surface
Aug 27, 201830 galEquipment Failure—Building or Structure
Jul 31, 2018300 galOther / Unknown—Unpaved surface
Jun 29, 201820 galEquipment Failure—Building or Structure
Apr 26, 20185 galEquipment Failure—Unpaved surface
Mar 9, 20186 galEquipment Failure—Other (specify below)
Mar 1, 20182 galEquipment Failure—Other (specify below)
Aug 31, 201712 galEquipment Failure—Paved Surface;Unpaved surface
Jun 23, 2017100 galEquipment Failure—Paved Surface;Street/Curb and Gutter;Unpaved surface
Dec 2, 201520 galRoot Intrusion—Building or Structure
Feb 17, 20152 galEquipment Failure—Paved Surface;Unpaved surface
Nov 20, 20145 galEquipment Failure—Paved Surface;Separate Storm Drain;Unpaved surface
Nov 14, 20141 galEquipment Failure—Unpaved surface
Jun 11, 2014100 galEquipment Failure—Paved Surface;Unpaved surface
Feb 26, 201470 galRoot Intrusion—Paved Surface;Unpaved surface
Feb 5, 2014100 galRoot Intrusion—Building or Structure
Jan 30, 2014100 galEquipment Failure—Building or Structure
Jan 22, 201430 galEquipment Failure—Building or Structure;Unpaved surface
Dec 20, 20132K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
Nov 27, 201350 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Nov 20, 201350 galRoot Intrusion—Building or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Nov 5, 20133 galEquipment Failure—Street/Curb and Gutter;Unpaved surface
Oct 25, 201330 galEquipment Failure—Paved Surface;Unpaved surface
Oct 24, 201350 galEquipment Failure—Building or Structure
Oct 11, 201370 galRoot Intrusion—Building or Structure
Jun 3, 2013100 galOther / Unknown—Other paved surface;Separate storm drain;Street/curb and gutter;Unpaved surface
Apr 29, 2013225 galRoot Intrusion—Unpaved surface
Apr 21, 201310 galOther / Unknown—Unpaved surface
Apr 19, 2013200 galRoot Intrusion—Other paved surface;Separate storm drain;Street/curb and gutter
Jan 20, 2013200 galOther / Unknown—Building or structure;Other paved surface
Jan 7, 201350 galOther / Unknown—Separate storm drain;Street/curb and gutter;Unpaved surface
Sep 11, 201235 galOther / Unknown—Separate storm drain;Unpaved surface
Jul 27, 2012200 galRoot Intrusion—Other paved surface;Unpaved surface
May 9, 201250 galRoot Intrusion—Unpaved surface
Apr 26, 201225 galRoot Intrusion—Building or structure
Apr 23, 2012410 galRoot Intrusion—Unpaved surface
Apr 17, 20125 galOther / Unknown—Building or structure;Other paved surface
Apr 16, 2012100 galOther / Unknown—Separate storm drain;Unpaved surface
Jan 17, 201275 galOther / Unknown—Building or structure
Nov 11, 201175 galOther / Unknown—Building or structure
Jul 15, 2011100 galOther / Unknown—Other paved surface;Separate storm drain;Street/curb and gutter
Apr 12, 2011300 galOther / Unknown—Building or structure
Dec 16, 2010200 galEquipment Failure—Other paved surface;Separate storm drain;Street/curb and gutter;Unpaved surface
Oct 15, 20105 galOther / Unknown—Unpaved surface
Jul 18, 2010100 galRoot Intrusion—Unpaved surface
Apr 1, 201050 galOther / Unknown—Unpaved surface
Feb 10, 201030 galOther / Unknown—Unpaved surface
Oct 9, 200910 galOther / Unknown—Street/curb and gutter;Unpaved surface
Oct 5, 200930 galOther / Unknown—Unpaved surface
Aug 17, 2009100 galOther / Unknown—Unpaved surface
Jun 16, 2009850 galOther / Unknown—Street/curb and gutter;Unpaved surface
May 12, 200920 galOther / Unknown—Unpaved surface
Feb 22, 2009100 galRoot Intrusion—Other paved surface;Unpaved surface
Feb 12, 200950 galRoot Intrusion—Building or structure;Other paved surface;Storm drain
Dec 3, 2008750 galRoot IntrusionYesSeparate storm drain;Street/curb and gutter;Other (specify below)
Sep 24, 2008100 galEquipment Failure—Storm drain;Street/curb and gutter
May 5, 200810 galEquipment Failure—Street/curb and gutter
Nov 13, 20073K galRoot Intrusion—Unpaved surface;Other (specify below)
Sep 5, 200720 galOther / Unknown—Other (specify below)
Jun 20, 20072K galRoot Intrusion—Other paved surface;Separate storm drain;Street/curb and gutter;Unpaved surface

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