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California · California (CIWQS)

Grass Valley City

D
Frequently reaches water
Reported events
121
Total volume
144K gal
Reached waterways
48 (40%)
Reporting since
2007

What caused the overflows

Equipment Failure
57
Other / Unknown
31
Root Intrusion
20
Grease / FOG
8
Rainfall / Flooding
4
Capacity Issue
1

Reported overflow events (showing 121 of 121)

DateVolumeCauseReached waterReceiving water
May 5, 20261K galEquipment FailureYesWolf Creek
Dec 21, 2025750 galGrease / FOG——
Aug 5, 202550 galEquipment Failure——
Jun 18, 20251K galEquipment FailureYesPeabody Creek, Condon Park Pond.
Nov 22, 2024500 galEquipment Failure—None
Nov 22, 2024500 galEquipment Failure——
Oct 25, 2024100 galEquipment Failure——
Sep 4, 2024360 galEquipment Failure——
Oct 2, 202374 galEquipment Failure——
Oct 2, 2023210 galEquipment Failure——
Apr 15, 2023125 galEquipment Failure—Paved Surface;Unpaved surface
Mar 15, 20232K galEquipment FailureYesSurface Water
Jan 5, 2023750 galOther / UnknownYesSurface Water
Oct 13, 2022260 galEquipment FailureYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Oct 1, 20223 galGrease / FOG—Paved Surface
Mar 17, 20221K galRoot Intrusion—Unpaved surface
Dec 15, 202140 galGrease / FOGYesPaved Surface;Surface Water
Nov 20, 2021600 galRoot IntrusionYesSurface Water
Jan 11, 202135 galRoot IntrusionYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 31, 20205 galRoot Intrusion—Paved Surface
May 12, 2020720 galRoot Intrusion—Unpaved surface
Mar 11, 2020220 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Feb 3, 202030 galRoot Intrusion—Separate Storm Drain
Dec 17, 20196 galEquipment FailureYesStreet/Curb and Gutter;Surface Water
Oct 16, 20195 galRoot Intrusion—Unpaved surface
Sep 12, 20195 galRoot Intrusion—Paved Surface
Sep 9, 20192 galRoot Intrusion—Paved Surface
Jun 3, 20195 galOther / Unknown—Paved Surface
Nov 8, 2018175 galGrease / FOGYesSeparate Storm Drain;Street/Curb and Gutter
Jun 29, 201820 galRoot Intrusion—Unpaved surface
May 24, 2018600 galEquipment Failure—Unpaved surface
Feb 7, 20181K galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 27, 2018160 galEquipment FailureYesPaved Surface;Street/Curb and Gutter;Surface Water
Jul 29, 201750 galOther / Unknown—Paved Surface;Street/Curb and Gutter;Unpaved surface
Jun 12, 201760 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Feb 28, 2017150 galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Feb 9, 2017150 galCapacity IssueYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Feb 7, 201720 galRainfall / FloodingYesSeparate Storm Drain
Feb 3, 2017130 galOther / UnknownYesDrainage Channel;Street/Curb and Gutter;Surface Water
Jan 25, 2017117 galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 22, 20171K galEquipment Failure—Unpaved surface
Jan 10, 20172K galRainfall / FloodingYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 8, 201740 galOther / UnknownYesSeparate Storm Drain
Dec 10, 2016450 galOther / UnknownYesBuilding or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Oct 31, 20169K galEquipment FailureYesDrainage Channel;Separate Storm Drain;Surface Water;Unpaved surface
Oct 8, 2016120 galEquipment Failure—Unpaved surface
Sep 6, 201640 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jun 24, 2016500 galGrease / FOGYesPaved Surface;Separate Storm Drain
May 21, 201620 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
May 11, 201620 galEquipment Failure—Unpaved surface
Apr 18, 201618 galEquipment Failure—Paved Surface
Mar 1, 201630 galEquipment Failure—Paved Surface;Separate Storm Drain
Sep 29, 20152 galRoot Intrusion—Paved Surface
May 27, 2015730 galEquipment FailureYesDrainage Channel;Surface Water
Apr 19, 2015300 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Apr 11, 20155 galEquipment Failure—Unpaved surface
Mar 17, 201535 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Mar 16, 20155 galEquipment Failure—Unpaved surface
Mar 4, 20152 galEquipment Failure—Unpaved surface
Feb 26, 201524 galEquipment Failure—Unpaved surface
Jan 29, 201520 galRoot Intrusion—Paved Surface
Nov 22, 2014168 galEquipment FailureYesDrainage Channel;Paved Surface;Street/Curb and Gutter;Unpaved surface
Sep 8, 201410 galEquipment Failure—Paved Surface
Sep 7, 2014100 galEquipment Failure—Paved Surface;Separate Storm Drain
Aug 6, 201415 galEquipment Failure—Unpaved surface
May 5, 201450 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Apr 18, 2014450 galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Apr 15, 20146 galEquipment Failure—Unpaved surface
Jan 23, 201430 galEquipment Failure—Paved Surface
Jan 23, 2014550 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 21, 20147 galOther / Unknown—Unpaved surface
Jan 3, 20142K galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 17, 20132K galEquipment FailureYesSurface Water;Unpaved surface
Dec 3, 20132 galEquipment Failure—Paved Surface
Nov 27, 2013279 galEquipment Failure—Paved Surface;Street/Curb and Gutter;Unpaved surface
Nov 19, 201310 galEquipment Failure—Unpaved surface
Nov 10, 201315 galEquipment Failure—Paved Surface
Oct 23, 201360 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Sep 12, 20134 galEquipment Failure—Unpaved surface
Jul 20, 201330 galRoot Intrusion—Other paved surface
May 10, 20135 galOther / UnknownYesOther paved surface;Separate storm drain
Jan 7, 2013550 galOther / Unknown—Unpaved surface
Dec 26, 201225 galOther / Unknown—Building or structure;Other paved surface
Dec 19, 201250 galOther / Unknown—Separate storm drain;Street/curb and gutter
Dec 16, 20121K galOther / UnknownYesSeparate storm drain;Street/curb and gutter;Surface water;Unpaved surface
Dec 12, 201250 galOther / UnknownYesSurface water;Unpaved surface
Dec 9, 20128K galGrease / FOGYesOther paved surface;Separate storm drain;Street/curb and gutter
Dec 2, 20122K galOther / UnknownYesSeparate storm drain;Street/curb and gutter;Surface water
Nov 13, 20123 galRoot Intrusion—Unpaved surface
Nov 4, 201213K galOther / UnknownYesUnpaved surface;Surface water
Oct 25, 201210 galOther / Unknown—Other paved surface;Unpaved surface
Jul 29, 2012250 galOther / Unknown—Unpaved surface;Other (specify below)
Jul 27, 2012112 galOther / Unknown—Separate storm drain;Street/curb and gutter
Jun 26, 2012210 galOther / Unknown—Other paved surface;Unpaved surface
Jun 18, 201210 galRoot Intrusion—Building or structure;Other paved surface;Unpaved surface
Jun 1, 2012159 galEquipment FailureYesSurface water
May 27, 2012390 galOther / UnknownYesOther paved surface;Separate storm drain;Street/curb and gutter;Surface water;Unpaved surface
May 24, 201210 galOther / Unknown—Building or structure;Unpaved surface;Other (specify below)
Mar 19, 20124K galOther / UnknownYesStreet/curb and gutter;Surface water;Unpaved surface
Mar 16, 2012120 galRainfall / FloodingYesStreet/curb and gutter;Surface water
Mar 16, 2012900 galRainfall / FloodingYesSeparate storm drain;Street/curb and gutter;Surface water
Feb 28, 20125 galOther / Unknown—Other paved surface
Feb 28, 201220 galRoot Intrusion—Street/curb and gutter;Unpaved surface
Jan 21, 20122K galOther / UnknownYesOther (specify below);Unpaved surface;Surface water
Jan 21, 2012900 galOther / UnknownYesSurface water
Dec 29, 201120 galOther / Unknown—Separate storm drain;Street/curb and gutter
Nov 9, 2011104 galOther / UnknownYesSurface water
Oct 18, 201167K galEquipment FailureYesSurface water;Unpaved surface;Other (specify below)
Dec 4, 2009200 galRoot IntrusionYesSeparate storm drain
Nov 21, 2009970 galGrease / FOG—Other (specify below)
Oct 5, 2008300 galEquipment Failure—Other paved surface
Sep 15, 200880 galEquipment Failure—Separate storm drain
Aug 11, 2008100 galOther / Unknown—Unpaved surface
Jul 28, 2008200 galOther / Unknown—Separate storm drain
Jul 11, 20082K galOther / UnknownYesUnpaved surface
Mar 17, 20082K galEquipment FailureYesSurface water
Feb 26, 20082K galEquipment FailureYesStorm drain
Jan 7, 20081K galRoot IntrusionYesSurface water
Oct 12, 2007150 galEquipment Failure—Street/curb and gutter
Sep 29, 2007150 galOther / Unknown—Storm drain;Street/curb and gutter
Jun 10, 20071K galEquipment FailureYesSurface water

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