All rankings
California · California (CIWQS)

Gilroy City

B
Seldom reaches water
Reported events
78
Total volume
78K gal
Reached waterways
10 (13%)
Reporting since
2007

What caused the overflows

Grease / FOG
32
Equipment Failure
25
Other / Unknown
12
Root Intrusion
9

Reported overflow events (showing 78 of 78)

DateVolumeCauseReached waterReceiving water
Jan 27, 2025100 galRoot Intrusion——
Mar 6, 202433K galEquipment Failure——
Dec 25, 20231K galGrease / FOGYesPrincevalle storm channel
Nov 24, 2023906 galGrease / FOG——
Nov 13, 202379 galEquipment Failure——
Nov 13, 2023265 galGrease / FOG——
May 30, 202384 galGrease / FOG—Street/Curb and Gutter
Apr 21, 202367 galGrease / FOG—Street/Curb and Gutter
Dec 12, 2022625 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Nov 12, 2022598 galEquipment FailureYesDrainage Channel
Apr 17, 2022233 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 13, 2022260 galGrease / FOG—Unpaved surface
Jan 8, 202255 galGrease / FOG—Paved Surface;Street/Curb and Gutter;Unpaved surface
Dec 27, 20216K galGrease / FOGYesSurface Water
Oct 26, 20215 galRoot Intrusion—Unpaved surface
Oct 9, 202156 galGrease / FOG—Street/Curb and Gutter;Unpaved surface
Oct 4, 202120 galEquipment Failure—Street/Curb and Gutter
Jun 27, 202175 galGrease / FOG—Unpaved surface
Apr 26, 2021103 galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Apr 15, 202160 galRoot Intrusion—Street/Curb and Gutter
Apr 2, 2021120 galEquipment Failure—Separate Storm Drain
Mar 25, 2021200 galEquipment FailureYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Mar 4, 20218 galRoot Intrusion—Paved Surface
Feb 12, 202175 galRoot Intrusion—Street/Curb and Gutter
Oct 15, 202082 galGrease / FOG—Combined Storm Drain (Combined CS only);Paved Surface;Street/Curb and Gutter
Apr 20, 2020868 galEquipment Failure—Unpaved surface
Jan 4, 20205 galGrease / FOG—Street/Curb and Gutter
Apr 7, 20192 galEquipment Failure—Street/Curb and Gutter
Mar 9, 20195 galEquipment Failure—Street/Curb and Gutter
Mar 8, 20191K galOther / UnknownYesDrainage Channel;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 3, 201910 galEquipment FailureYesSeparate Storm Drain
Nov 23, 201820K galGrease / FOG—Separate Storm Drain;Unpaved surface
May 6, 2018290 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 5, 201815 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Jan 4, 2018300 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Dec 18, 2017250 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Aug 12, 2017285 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Dec 1, 20165 galGrease / FOG—Building or Structure;Paved Surface
Nov 7, 2016270 galEquipment Failure—Street/Curb and Gutter
Oct 25, 20164K galEquipment FailureYesCombined Storm Drain (Combined CS only);Drainage Channel
Sep 19, 201650 galEquipment Failure—Paved Surface;Separate Storm Drain;Unpaved surface
Jul 1, 20162K galGrease / FOG—Unpaved surface
Oct 22, 201550 galGrease / FOG—Other (specify below)
Jul 23, 2015310 galGrease / FOG—Separate Storm Drain
Jul 1, 201550 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Jun 26, 201587 galEquipment FailureYesDrainage Channel;Separate Storm Drain;Street/Curb and Gutter
May 7, 2015100 galGrease / FOG—Paved Surface
Jan 14, 20151K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 23, 201340 galRoot Intrusion—Other paved surface
Jan 17, 201380 galOther / Unknown—Separate storm drain;Street/curb and gutter
Dec 14, 201220 galOther / Unknown—Combined storm drain (combined CS only)
Nov 27, 2011315 galOther / Unknown—Separate storm drain;Street/curb and gutter
Sep 21, 201140 galRoot Intrusion—Other paved surface;Unpaved surface
Jan 27, 201125 galGrease / FOG—Separate storm drain;Street/curb and gutter
Jan 7, 201038 galRoot Intrusion—Street/curb and gutter
Nov 24, 2009270 galOther / Unknown—Storm drain;Street/curb and gutter
Aug 29, 200920 galOther / Unknown—Street/curb and gutter
Jul 29, 200925 galOther / Unknown—Other paved surface;Storm drain;Street/curb and gutter
Apr 21, 200930 galOther / Unknown—Storm drain;Street/curb and gutter
Apr 19, 2009450 galRoot Intrusion—Storm drain;Street/curb and gutter
Apr 11, 200915 galOther / Unknown—Storm drain;Street/curb and gutter
Jan 30, 20091K galGrease / FOG—Storm drain;Street/curb and gutter;Unpaved surface
Jan 8, 200915 galGrease / FOG—Street/curb and gutter
Nov 17, 200840 galGrease / FOG—Street/curb and gutter
Oct 25, 200860 galOther / Unknown—Other paved surface;Street/curb and gutter
Aug 2, 2008110 galGrease / FOG—Unpaved surface
Jul 28, 2008360 galGrease / FOG—Street/curb and gutter
Apr 14, 2008400 galOther / Unknown—Unpaved surface
Mar 18, 2008225 galGrease / FOG—Storm drain;Street/curb and gutter
Mar 8, 200880 galEquipment Failure—Other paved surface;Street/curb and gutter
Mar 8, 200840 galOther / Unknown—Other paved surface;Street/curb and gutter
Jan 31, 200820 galGrease / FOG—Other paved surface;Street/curb and gutter
Dec 27, 200730 galGrease / FOG—Street/curb and gutter
Dec 26, 200750 galGrease / FOG—Unpaved surface
Dec 24, 200760 galEquipment Failure—Street/curb and gutter
Nov 28, 2007400 galGrease / FOG—Other paved surface;Storm drain;Street/curb and gutter
Jun 20, 20075 galGrease / FOG—Street/curb and gutter
Jun 20, 20075 galGrease / FOG—Street/curb and gutter

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