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California · California (CIWQS)

City of Morgan Hill

B
Seldom reaches water
Reported events
132
Total volume
508K gal
Reached waterways
14 (11%)
Reporting since
2007

What caused the overflows

Root Intrusion
60
Grease / FOG
28
Equipment Failure
25
Other / Unknown
13
Rainfall / Flooding
5
Capacity Issue
1

Reported overflow events (showing 132 of 132)

DateVolumeCauseReached waterReceiving water
Mar 13, 202689 galRoot Intrusion——
Feb 18, 202651 galRoot Intrusion——
Feb 16, 20262K galRoot IntrusionYesAnderson Lake
Aug 21, 2025196 galRoot Intrusion——
Feb 8, 2025143 galGrease / FOG——
Sep 23, 2024264 galEquipment Failure——
May 28, 2024360 galRoot Intrusion——
Feb 16, 202460 galRoot Intrusion——
Jan 11, 2024450 galRoot Intrusion——
Jan 11, 2024385 galEquipment Failure——
Oct 27, 2023602 galGrease / FOG——
Apr 5, 202345 galGrease / FOG—Paved Surface;Separate Storm Drain
Feb 17, 20236K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Jan 10, 20232 galRoot Intrusion—Street/Curb and Gutter
Nov 11, 202265 galEquipment Failure—Unpaved surface
Mar 7, 2022102 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Nov 13, 2020980 galGrease / FOGYesDrainage Channel;Paved Surface;Street/Curb and Gutter;Unpaved surface
Nov 4, 2020531 galEquipment Failure—Unpaved surface
Oct 11, 202014 galGrease / FOG—Paved Surface;Unpaved surface
Sep 24, 2020777 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
May 31, 202099 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
May 30, 2020330 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Apr 18, 202047 galRoot Intrusion—Unpaved surface
Dec 16, 201939 galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Nov 9, 2019495 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Oct 31, 2019943 galEquipment Failure—Other (specify below);Paved Surface
Oct 15, 2019892 galRoot Intrusion—Unpaved surface
Jul 6, 2019142 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
May 4, 20194 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Mar 30, 201955 galRoot Intrusion—Separate Storm Drain
Mar 13, 201920 galRoot Intrusion—Unpaved surface
Feb 9, 201911 galGrease / FOG—Unpaved surface
Jan 19, 2019253 galRoot Intrusion—Unpaved surface
Jan 18, 20191 galRoot Intrusion—Unpaved surface
Nov 12, 20186 galGrease / FOG—Paved Surface
Oct 18, 20182K galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Sep 13, 20185 galRoot Intrusion—Paved Surface
Aug 29, 2018211 galEquipment Failure—Unpaved surface
Mar 26, 20182K galRoot Intrusion—Unpaved surface
Jan 7, 2018212 galRoot Intrusion—Paved Surface
Oct 18, 20175 galRoot Intrusion—Unpaved surface
Sep 30, 2017360 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Aug 22, 20171 galEquipment Failure—Paved Surface
May 29, 2017450 galRoot Intrusion—Unpaved surface
May 4, 201710K galEquipment Failure—Paved Surface
Mar 4, 201750 galGrease / FOG—Unpaved surface
Feb 20, 201778K galOther / UnknownYesDrainage Channel
Feb 12, 201760 galRoot Intrusion—Unpaved surface
Feb 7, 2017300 galRainfall / FloodingYesDrainage Channel
Jan 28, 201750 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Jan 24, 2017160 galOther / Unknown—Unpaved surface
Jan 10, 2017850 galRainfall / FloodingYesSurface Water
Jan 10, 2017465 galRainfall / FloodingYesPaved Surface;Surface Water
Jan 10, 20174K galRainfall / FloodingYesPaved Surface
Jan 8, 201720K galEquipment Failure—Paved Surface
Jan 8, 2017204K galRainfall / FloodingYesDrainage Channel;Surface Water
Jan 8, 201758K galEquipment FailureYesDrainage Channel;Separate Storm Drain;Street/Curb and Gutter
Nov 28, 2016300 galRoot Intrusion—Unpaved surface
Nov 12, 2016200 galEquipment Failure—Street/Curb and Gutter
Aug 30, 2016100 galRoot Intrusion—Unpaved surface
Mar 17, 20166K galEquipment Failure—Drainage Channel
Feb 23, 201610 galGrease / FOG—Paved Surface
Dec 29, 20151K galEquipment Failure—Unpaved surface
Dec 10, 201512K galOther / UnknownYesSurface Water
Oct 9, 201550 galEquipment Failure—Paved Surface
Aug 16, 201510 galRoot Intrusion—Street/Curb and Gutter
May 24, 2015100 galRoot Intrusion—Street/Curb and Gutter
Mar 3, 2015100 galRoot Intrusion—Street/Curb and Gutter
Jan 31, 201550 galRoot Intrusion—Unpaved surface
Dec 29, 201425 galRoot Intrusion—Unpaved surface
Dec 29, 2014250 galEquipment FailureYesDrainage Channel
Dec 23, 2014300 galRoot Intrusion—Street/Curb and Gutter
Nov 24, 201420 galEquipment Failure—Street/Curb and Gutter
Oct 12, 2014200 galRoot Intrusion—Street/Curb and Gutter
Oct 10, 201460 galEquipment Failure—Unpaved surface
Jul 1, 201475 galRoot Intrusion—Street/Curb and Gutter
Jun 27, 2014100 galGrease / FOG—Street/Curb and Gutter
Mar 10, 2014600 galRoot Intrusion—Unpaved surface
Mar 1, 20141K galOther / Unknown—Unpaved surface
Jan 20, 2014300 galRoot Intrusion—Drainage Channel;Unpaved surface
Dec 19, 2013100 galGrease / FOG—Unpaved surface
Nov 30, 201320 galGrease / FOG—Street/Curb and Gutter
Nov 29, 2013100 galGrease / FOG—Paved Surface;Separate Storm Drain
Oct 16, 201320 galRoot Intrusion—Unpaved surface
Sep 24, 201375 galRoot Intrusion—Paved Surface
Jul 4, 201320 galOther / Unknown—Street/curb and gutter
Feb 5, 201350 galRoot Intrusion—Unpaved surface
Dec 29, 2012700 galGrease / FOG—Other paved surface;Separate storm drain
Dec 22, 2012810 galOther / Unknown—Unpaved surface;Other (specify below)
Dec 21, 2012100 galOther / Unknown—Other paved surface;Unpaved surface
Nov 29, 2012100 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Nov 7, 201220 galGrease / FOG—Building or structure
Sep 30, 201210 galGrease / FOG—Street/curb and gutter
Aug 19, 2012200 galRoot Intrusion—Street/curb and gutter
May 14, 2012300 galGrease / FOG—Other paved surface
Apr 12, 2012600 galRoot Intrusion—Building or structure
Dec 23, 201125 galOther / Unknown—Street/curb and gutter
Nov 26, 201125 galGrease / FOG—Other paved surface;Street/curb and gutter;Unpaved surface
Jul 7, 201140 galGrease / FOG—Street/curb and gutter
May 4, 2011125 galOther / Unknown—Street/curb and gutter;Unpaved surface
Nov 8, 201020 galEquipment Failure—Unpaved surface
Aug 3, 2010100 galRoot Intrusion—Unpaved surface
Jun 1, 201030 galOther / Unknown—Separate storm drain;Street/curb and gutter
Mar 30, 2010150 galRoot Intrusion—Storm drain;Street/curb and gutter
Jan 15, 20103 galGrease / FOG—Street/curb and gutter
Dec 30, 200930 galRoot Intrusion—Other paved surface;Street/curb and gutter
Nov 4, 200930 galRoot Intrusion—Storm drain;Street/curb and gutter
Oct 13, 200948K galOther / Unknown—Unpaved surface
May 13, 2009500 galRoot Intrusion—Other paved surface;Street/curb and gutter;Unpaved surface
May 13, 2009750 galRoot Intrusion—Other paved surface;Street/curb and gutter;Unpaved surface
May 9, 200910 galRoot Intrusion—Street/curb and gutter
Apr 14, 200945 galGrease / FOG—Building or structure;Other paved surface;Street/curb and gutter;Unpaved surface
Feb 21, 2009150 galGrease / FOG—Other paved surface
Jan 2, 2009800 galGrease / FOG—Storm drain
Dec 23, 200850 galOther / Unknown—Separate storm drain
Dec 20, 2008800 galOther / UnknownYesSeparate storm drain;Surface water;Unpaved surface
Dec 14, 200850 galRoot Intrusion—Unpaved surface
Nov 22, 200825 galRoot Intrusion—Other paved surface
Oct 5, 2008450 galEquipment Failure—Unpaved surface
Oct 5, 2008100 galEquipment Failure—Unpaved surface
Oct 1, 2008600 galEquipment Failure—Unpaved surface
Sep 9, 20085 galGrease / FOG—Other paved surface
Aug 25, 2008400 galRoot Intrusion—Unpaved surface
May 7, 200850 galRoot Intrusion—Other paved surface
Jan 16, 200850 galRoot Intrusion—Other paved surface;Unpaved surface
Jan 4, 200831K galCapacity Issue—Unpaved surface
Oct 31, 200720 galRoot Intrusion—Unpaved surface
Oct 29, 200710 galRoot Intrusion—Other paved surface;Unpaved surface
Oct 18, 200720 galGrease / FOG—Unpaved surface
Oct 10, 2007240 galGrease / FOG—Other (specify below)
Sep 12, 200750 galGrease / FOG—Storm drain;Street/curb and gutter
Jul 3, 200750 galEquipment Failure—Other paved surface;Street/curb and gutter

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