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California · California (CIWQS)

Redwood City

C
Often reaches water
Reported events
264
Total volume
507K gal
Reached waterways
50 (19%)
Reporting since
2007

What caused the overflows

Root Intrusion
98
Grease / FOG
61
Equipment Failure
51
Other / Unknown
44
Rainfall / Flooding
8
Capacity Issue
2

Reported overflow events (showing 200 of 264)

DateVolumeCauseReached waterReceiving water
Apr 24, 2026469 galRoot Intrusion——
Feb 16, 20269K galRoot IntrusionYesRedwood Creek
Jan 12, 2026258 galRoot Intrusion——
Dec 27, 2025133 galOther / Unknown——
Nov 4, 2025262 galGrease / FOG——
Nov 3, 20251K galGrease / FOGYesRedwood Creek
Oct 24, 2025270 galGrease / FOG——
Aug 4, 2025110 galGrease / FOG——
May 19, 2025141 galRoot Intrusion——
Mar 29, 2025300 galGrease / FOG——
Feb 18, 2025124 galRoot Intrusion——
Dec 9, 202458 galEquipment Failure——
Oct 23, 2024504 galGrease / FOG——
Sep 12, 202493 galGrease / FOG——
Sep 5, 2024810 galGrease / FOG——
Jul 11, 2024305 galGrease / FOG——
May 1, 20241K galEquipment Failure——
Apr 26, 20241K galEquipment Failure——
Feb 7, 20243K galEquipment Failure——
Nov 26, 2023120 galGrease / FOG——
Dec 13, 2022201 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Nov 23, 2022280 galEquipment Failure—Street/Curb and Gutter
Oct 28, 2022310 galGrease / FOG—Paved Surface;Street/Curb and Gutter
Oct 10, 2022200 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Sep 30, 2022600 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Sep 29, 2022300 galRoot Intrusion—Unpaved surface
Mar 10, 20222 galGrease / FOG—Paved Surface;Street/Curb and Gutter
Mar 9, 20225 galEquipment Failure—Street/Curb and Gutter
Dec 1, 2021135 galEquipment Failure—Street/Curb and Gutter
Nov 17, 202114 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Nov 12, 20212K galRoot Intrusion—Street/Curb and Gutter
Nov 10, 20213K galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Aug 6, 2021411 galRoot Intrusion—Unpaved surface
Jul 23, 2021555 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
May 25, 202175 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
May 21, 202152 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
May 20, 202160 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
May 19, 2021380 galRoot Intrusion—Street/Curb and Gutter
May 18, 202163 galRoot Intrusion—Unpaved surface
May 13, 202150 galEquipment Failure—Paved Surface;Street/Curb and Gutter
May 1, 2021327 galRoot IntrusionYesDrainage Channel;Surface Water;Unpaved surface
Mar 15, 202150 galOther / Unknown—Separate Storm Drain;Street/Curb and Gutter
Mar 15, 2021176 galRoot Intrusion—Street/Curb and Gutter
Mar 8, 2021163 galEquipment Failure—Street/Curb and Gutter
Jan 15, 202116 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Dec 15, 20203K galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Oct 18, 2020143 galRoot Intrusion—Unpaved surface
Sep 30, 202025 galEquipment Failure—Street/Curb and Gutter
Sep 30, 202048 galEquipment Failure—Street/Curb and Gutter
Sep 20, 2020564 galRoot Intrusion—Street/Curb and Gutter
Aug 4, 2020198 galGrease / FOG—Street/Curb and Gutter
Jul 5, 202027 galRoot Intrusion—Paved Surface;Street/Curb and Gutter;Unpaved surface
May 13, 20209 galGrease / FOG—Street/Curb and Gutter
Apr 18, 20202 galGrease / FOG—Street/Curb and Gutter
Mar 3, 20202K galRoot IntrusionYesSurface Water
Feb 24, 2020208 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Feb 11, 2020347 galRoot Intrusion—Street/Curb and Gutter
Feb 6, 20208 galRoot Intrusion—Street/Curb and Gutter
Jan 1, 202084 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Nov 22, 2019240 galRoot Intrusion—Paved Surface
Sep 18, 2019121 galGrease / FOG—Paved Surface;Street/Curb and Gutter;Unpaved surface
Aug 16, 201940 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
May 24, 2019262 galEquipment Failure—Unpaved surface
Apr 30, 20199 galGrease / FOG—Street/Curb and Gutter
Apr 3, 201938 galRoot Intrusion—Unpaved surface
Mar 27, 201938 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Mar 6, 2019572 galRoot Intrusion—Unpaved surface
Feb 5, 2019300 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Dec 9, 201867 galRoot Intrusion—Street/Curb and Gutter
Dec 5, 20182 galRoot Intrusion—Street/Curb and Gutter
Oct 30, 20183 galRoot Intrusion—Building or Structure
Oct 12, 201810 galRoot Intrusion—Street/Curb and Gutter
Sep 21, 2018290 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Aug 20, 201853 galRoot Intrusion—Street/Curb and Gutter
Aug 13, 20185 galRoot Intrusion—Building or Structure
Aug 8, 2018323 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Jul 13, 201818 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Jul 4, 2018150 galOther / Unknown—Paved Surface
Jun 27, 20185 galRoot Intrusion—Building or Structure
Jun 19, 201845 galOther / Unknown—Separate Storm Drain
May 7, 2018150 galOther / Unknown—Other (specify below)
Mar 30, 20188 galGrease / FOG—Street/Curb and Gutter
Mar 5, 201849 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Mar 2, 2018450 galRoot IntrusionYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Feb 16, 2018525 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Feb 7, 201825 galOther / Unknown—Separate Storm Drain;Street/Curb and Gutter
Oct 2, 2017102 galGrease / FOG—Street/Curb and Gutter
Sep 24, 201725 galEquipment Failure—Paved Surface
Aug 18, 2017250 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jul 29, 201780 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jul 28, 2017600 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jul 9, 201712 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Apr 22, 201720K galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Apr 7, 20172K galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Mar 24, 201750 galEquipment Failure—Unpaved surface
Mar 17, 2017100 galEquipment Failure—Street/Curb and Gutter
Mar 10, 2017375 galGrease / FOG—Building or Structure
Feb 22, 2017595 galOther / Unknown—Other (specify below);Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 7, 20178K galCapacity IssueYesSeparate Storm Drain
Oct 31, 2016800 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Sep 1, 2016375 galRoot Intrusion—Street/Curb and Gutter
Aug 8, 2016245 galGrease / FOG—Street/Curb and Gutter
Jul 27, 2016300 galGrease / FOG—Street/Curb and Gutter
Jul 26, 2016400 galEquipment Failure—Building or Structure
Jul 20, 201613K galEquipment Failure—Other (specify below);Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jul 15, 201643K galEquipment Failure—Other (specify below);Separate Storm Drain;Street/Curb and Gutter
Jul 6, 2016375 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Jun 21, 2016150 galEquipment FailureYesDrainage Channel
Jun 8, 20161K galEquipment FailureYesSeparate Storm Drain
Apr 28, 2016600 galEquipment Failure—Street/Curb and Gutter
Apr 25, 201650 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Mar 23, 2016750 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Mar 16, 2016200 galGrease / FOG—Street/Curb and Gutter
Mar 10, 20162K galRoot Intrusion—Separate Storm Drain
Mar 9, 20163K galEquipment FailureYesSeparate Storm Drain
Feb 24, 2016325 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Feb 20, 201650 galRoot Intrusion—Street/Curb and Gutter
Feb 14, 201650 galEquipment Failure—Street/Curb and Gutter
Jul 15, 20156K galEquipment FailureYesDrainage Channel;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Jun 8, 201515 galEquipment Failure—Street/Curb and Gutter
Apr 7, 201525 galGrease / FOG—Separate Storm Drain
Jan 28, 20153K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 22, 20152K galRoot IntrusionYesDrainage Channel;Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 20, 20152K galGrease / FOGYesDrainage Channel;Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Dec 26, 20144K galRoot IntrusionYesSurface Water
Aug 26, 2014600 galRoot IntrusionYesSeparate Storm Drain
Aug 8, 201485 galGrease / FOG—Separate Storm Drain
Aug 5, 2014830 galEquipment FailureYesSeparate Storm Drain
Jun 27, 201450 galRoot IntrusionYesSurface Water
Jun 27, 2014525 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
May 5, 201415 galEquipment Failure—Building or Structure
Apr 21, 20143 galRoot Intrusion—Paved Surface
Apr 9, 2014650 galEquipment Failure—Separate Storm Drain
Apr 7, 20142K galRoot IntrusionYesDrainage Channel
Mar 31, 201460 galRoot Intrusion—Building or Structure
Mar 31, 20143 galOther / Unknown—Building or Structure
Mar 28, 20142K galEquipment Failure—Separate Storm Drain
Mar 6, 2014550 galCapacity Issue—Separate Storm Drain
Mar 4, 201420 galRoot Intrusion—Unpaved surface
Feb 24, 201460 galEquipment Failure—Separate Storm Drain
Feb 23, 20144K galRoot IntrusionYesDrainage Channel
Feb 13, 201441 galRoot Intrusion—Separate Storm Drain
Feb 3, 20142K galGrease / FOG—Separate Storm Drain
Jan 4, 2014300 galEquipment FailureYesDrainage Channel
Oct 24, 201325 galGrease / FOG—Building or Structure;Separate Storm Drain
Oct 17, 201315 galRoot Intrusion—Unpaved surface
Aug 21, 2013200 galOther / UnknownYesSeparate storm drain;Surface water;Other (specify below)
Aug 19, 201321 galOther / UnknownYesOther (specify below)
Jul 5, 201350 galRoot Intrusion—Building or structure
Jun 26, 2013150 galOther / UnknownYesSurface water;Other (specify below)
May 30, 20131 galOther / Unknown—Other (specify below)
May 5, 201310 galRoot Intrusion—Building or structure
Apr 18, 201322 galOther / Unknown—Street/curb and gutter
Apr 3, 201310 galGrease / FOG—Building or structure
Mar 26, 201324 galGrease / FOG—Street/curb and gutter
Jan 30, 2013600 galOther / Unknown—Other (specify below)
Jan 17, 2013450 galOther / Unknown—Separate storm drain;Street/curb and gutter;Other (specify below)
Dec 17, 201210 galOther / Unknown—Building or structure
Oct 31, 201233 galOther / Unknown—Separate storm drain;Street/curb and gutter;Other (specify below)
Oct 11, 20125 galOther / Unknown—Other paved surface;Other (specify below)
Sep 30, 20122K galOther / Unknown—Separate storm drain;Street/curb and gutter
Sep 24, 20125 galRoot Intrusion—Street/curb and gutter;Unpaved surface
Sep 13, 201215 galOther / Unknown—Building or structure
Aug 1, 201220 galRoot Intrusion—Building or structure
Jun 18, 2012100 galEquipment Failure—Unpaved surface;Other (specify below)
May 2, 201210 galRoot Intrusion—Building or structure;Unpaved surface
Apr 4, 2012240 galRoot Intrusion—Unpaved surface;Other (specify below)
Apr 2, 2012100 galEquipment Failure—Other paved surface;Separate storm drain;Street/curb and gutter;Unpaved surface;Other (specify below)
Mar 26, 201215 galGrease / FOG—Other paved surface;Other (specify below)
Mar 26, 20127K galGrease / FOGYesSurface water;Other (specify below)
Feb 26, 20123K galGrease / FOGYesBuilding or structure;Separate storm drain;Street/curb and gutter;Other (specify below)
Feb 25, 201215 galOther / Unknown—Unpaved surface
Feb 17, 20125 galRoot Intrusion—Building or structure
Feb 8, 201230 galGrease / FOG—Building or structure
Feb 7, 2012255 galEquipment Failure—Street/curb and gutter
Jan 30, 201210 galRoot Intrusion—Building or structure;Unpaved surface
Jan 28, 20125 galOther / Unknown—Other paved surface;Other (specify below)
Jan 28, 20122K galRoot IntrusionYesOther (specify below)
Jan 18, 2012500 galRoot Intrusion—Separate storm drain;Street/curb and gutter;Other (specify below)
Jan 9, 201240 galRoot Intrusion—Street/curb and gutter;Unpaved surface
Jan 9, 2012825 galRoot IntrusionYesSeparate storm drain;Surface water;Other (specify below)
Jan 3, 20123 galRoot Intrusion—Building or structure;Other (specify below)
Dec 26, 201120 galRoot Intrusion—Street/curb and gutter
Dec 11, 20117 galRoot Intrusion—Unpaved surface;Other (specify below)
Dec 5, 20112 galOther / Unknown—Building or structure
Dec 4, 20115 galRoot Intrusion—Building or structure
Nov 21, 201130 galGrease / FOG—Other paved surface;Other (specify below)
Oct 28, 20115 galRoot Intrusion—Unpaved surface;Other (specify below)
Oct 24, 201130 galRoot Intrusion—Street/curb and gutter
Oct 23, 201190 galRoot Intrusion—Street/curb and gutter;Other (specify below)
Jul 2, 201120 galOther / Unknown—Unpaved surface;Other (specify below)
Jun 27, 20115 galGrease / FOG—Other paved surface
Jun 20, 201125 galRoot Intrusion—Unpaved surface;Other (specify below)
Jun 13, 201130 galOther / Unknown—Other paved surface;Separate storm drain;Street/curb and gutter;Other (specify below)
Jun 6, 201160 galRoot Intrusion—Street/curb and gutter
May 16, 2011100 galRoot Intrusion—Building or structure;Other (specify below)
May 7, 201150 galRoot Intrusion—Street/curb and gutter;Other (specify below)
Apr 8, 201120 galRoot Intrusion—Street/curb and gutter;Unpaved surface
Mar 29, 2011187 galOther / Unknown—Building or structure
Mar 24, 2011600 galOther / Unknown—Building or structure;Other paved surface;Unpaved surface

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