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California · California (CIWQS)

Palo Alto City

A
Rarely reaches water
Reported events
2,134
Total volume
164K gal
Reached waterways
20 (1%)
Reporting since
2007

What caused the overflows

Root Intrusion
694
Equipment Failure
167
Other / Unknown
79
Grease / FOG
60

Reported overflow events (showing 200 of 2,134)

DateVolumeCauseReached waterReceiving water
Jan 20, 2026265 galOther / Unknown——
Jan 6, 2026226 galGrease / FOG——
Jan 5, 2026271 galGrease / FOG——
Nov 20, 2025251 galEquipment Failure——
Oct 9, 202552 galRoot Intrusion——
Sep 23, 202552 galGrease / FOG——
Sep 17, 202551 galGrease / FOG——
Jan 29, 202560 galRoot Intrusion——
Jun 4, 2024100 galRoot Intrusion——
Feb 18, 2024455 galGrease / FOG——
Oct 5, 2023896 galEquipment Failure——
Aug 17, 2023123 galRoot Intrusion——
May 28, 202319 galGrease / FOG—Street/Curb and Gutter
May 27, 202316 galRoot Intrusion—Street/Curb and Gutter
May 13, 20235 galRoot Intrusion—Street/Curb and Gutter
May 10, 202321 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Apr 27, 202325 galRoot Intrusion—Street/Curb and Gutter
Apr 17, 20236 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Apr 17, 20236 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Mar 27, 20233 galRoot Intrusion—Street/Curb and Gutter
Mar 10, 2023720 galEquipment Failure—Unpaved surface
Feb 12, 202329 galRoot Intrusion—Street/Curb and Gutter
Jan 27, 202323 galRoot Intrusion—Street/Curb and Gutter
Jan 25, 202326 galEquipment Failure—Street/Curb and Gutter
Jan 21, 2023202 galRoot Intrusion—Street/Curb and Gutter
Jan 19, 2023157 galGrease / FOG—Street/Curb and Gutter
Jan 17, 202311 galEquipment Failure—Street/Curb and Gutter
Dec 26, 202228 galEquipment Failure—Paved Surface;Separate Storm Drain
Dec 26, 20229 galRoot Intrusion—Street/Curb and Gutter
Dec 25, 20227 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Dec 24, 202211 galRoot Intrusion—Street/Curb and Gutter
Dec 21, 202254 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Dec 14, 202276 galRoot Intrusion—Street/Curb and Gutter
Dec 12, 20227 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Nov 29, 20226 galRoot Intrusion—Street/Curb and Gutter
Nov 18, 202218 galRoot Intrusion—Street/Curb and Gutter
Nov 17, 20221 galRoot Intrusion—Street/Curb and Gutter
Nov 17, 20221 galRoot Intrusion—Street/Curb and Gutter
Nov 6, 202215 galRoot Intrusion—Street/Curb and Gutter
Nov 4, 202215 galEquipment Failure—Street/Curb and Gutter
Oct 31, 202232 galRoot Intrusion—Street/Curb and Gutter
Oct 22, 202234 galEquipment Failure—Street/Curb and Gutter
Oct 5, 202215 galRoot Intrusion—Street/Curb and Gutter
Sep 9, 202219 galRoot Intrusion—Street/Curb and Gutter
Jul 28, 202210 galRoot Intrusion—Street/Curb and Gutter
Jul 20, 202225 galRoot Intrusion—Street/Curb and Gutter
Jul 19, 20223 galRoot Intrusion—Street/Curb and Gutter
Jul 13, 2022200 galRoot IntrusionYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Jul 12, 20224 galRoot Intrusion—Street/Curb and Gutter
Jul 11, 202245 galRoot Intrusion—Street/Curb and Gutter
Jul 7, 20227 galRoot Intrusion—Street/Curb and Gutter
Jul 4, 20229 galRoot Intrusion—Street/Curb and Gutter
Jul 2, 20229 galRoot Intrusion—Street/Curb and Gutter
Jun 25, 2022143 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Jun 19, 2022114 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
May 19, 202245 galRoot Intrusion—Unpaved surface
May 17, 202229 galRoot Intrusion—Unpaved surface
May 17, 202247 galEquipment Failure—Street/Curb and Gutter
May 15, 202218 galRoot Intrusion—Unpaved surface
May 10, 202263 galEquipment Failure—Street/Curb and Gutter
May 10, 2022690 galOther / UnknownYesPaved Surface;Separate Storm Drain;Surface Water
May 4, 20227 galRoot Intrusion—Street/Curb and Gutter
May 2, 202230 galEquipment Failure—Paved Surface;Street/Curb and Gutter
May 1, 202214 galRoot Intrusion—Street/Curb and Gutter
Apr 25, 202265 galRoot Intrusion—Street/Curb and Gutter
Apr 15, 2022154 galRoot Intrusion—Other (specify below)
Apr 10, 202225 galRoot Intrusion—Other (specify below);Street/Curb and Gutter
Apr 5, 202231 galRoot Intrusion—Street/Curb and Gutter
Apr 2, 202218 galRoot Intrusion—Street/Curb and Gutter
Apr 2, 202231 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Feb 17, 202255 galRoot Intrusion—Street/Curb and Gutter
Feb 13, 202225 galRoot Intrusion—Street/Curb and Gutter
Feb 12, 2022280 galGrease / FOG—Street/Curb and Gutter
Jan 20, 202229 galRoot Intrusion—Street/Curb and Gutter
Jan 17, 202257 galRoot Intrusion—Unpaved surface
Jan 17, 202211 galRoot Intrusion—Unpaved surface
Jan 15, 202291 galRoot Intrusion—Street/Curb and Gutter
Jan 12, 202220 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Jan 9, 2022686 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Jan 8, 202243 galRoot Intrusion—Street/Curb and Gutter
Jan 6, 202224 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Jan 3, 20227 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Dec 31, 20211 galRoot Intrusion—Street/Curb and Gutter
Dec 26, 2021179 galEquipment Failure—Separate Storm Drain
Dec 8, 202118 galRoot Intrusion—Separate Storm Drain
Nov 30, 202153 galGrease / FOG—Street/Curb and Gutter
Nov 22, 202117 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Nov 19, 2021159 galEquipment Failure—Street/Curb and Gutter
Nov 18, 20215 galRoot Intrusion—Street/Curb and Gutter
Nov 16, 202125 galRoot Intrusion—Street/Curb and Gutter
Nov 12, 2021287 galEquipment Failure—Paved Surface
Oct 30, 2021133 galEquipment Failure—Street/Curb and Gutter
Oct 27, 20214 galRoot Intrusion—Street/Curb and Gutter
Oct 26, 20215 galGrease / FOG—Street/Curb and Gutter
Oct 25, 2021360 galGrease / FOG—Street/Curb and Gutter
Oct 2, 20219 galRoot Intrusion—Street/Curb and Gutter
Sep 19, 202113 galEquipment Failure—Street/Curb and Gutter
Sep 6, 20212 galRoot Intrusion—Unpaved surface
Sep 5, 202149 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Aug 29, 202120 galRoot Intrusion—Street/Curb and Gutter
Aug 28, 202151 galRoot Intrusion—Street/Curb and Gutter
Aug 2, 202111 galEquipment Failure—Street/Curb and Gutter
Jul 27, 20211K galRoot Intrusion—Drainage Channel;Paved Surface;Street/Curb and Gutter;Unpaved surface
Jul 17, 2021175 galRoot Intrusion—Street/Curb and Gutter
Jul 17, 202158 galRoot Intrusion—Street/Curb and Gutter
Jun 10, 202160 galEquipment Failure—Street/Curb and Gutter
Jun 2, 202115 galRoot Intrusion—Street/Curb and Gutter
May 23, 202149 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
May 7, 2021187 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Apr 20, 20219 galRoot Intrusion—Street/Curb and Gutter
Apr 4, 202122 galRoot Intrusion—Street/Curb and Gutter
Mar 31, 20215 galEquipment Failure—Street/Curb and Gutter
Mar 21, 202113 galEquipment Failure—Street/Curb and Gutter
Mar 21, 202138 galRoot Intrusion—Street/Curb and Gutter
Mar 17, 20213 galRoot Intrusion—Separate Storm Drain
Mar 7, 20213 galRoot Intrusion—Street/Curb and Gutter
Feb 21, 202118 galRoot Intrusion—Street/Curb and Gutter
Feb 16, 202151 galEquipment Failure—Street/Curb and Gutter
Feb 15, 202130 galRoot Intrusion—Street/Curb and Gutter
Feb 15, 202115 galRoot Intrusion—Street/Curb and Gutter
Feb 15, 202115 galRoot Intrusion—Street/Curb and Gutter
Feb 11, 20216 galRoot Intrusion—Street/Curb and Gutter
Feb 10, 2021149 galEquipment Failure—Street/Curb and Gutter
Feb 6, 202130 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 5, 202112 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Jan 23, 202110 galRoot Intrusion—Unpaved surface
Jan 17, 202113 galRoot Intrusion—Street/Curb and Gutter
Jan 2, 202121 galRoot Intrusion—Street/Curb and Gutter
Dec 28, 20206 galRoot Intrusion—Street/Curb and Gutter
Dec 5, 202045 galRoot Intrusion—Street/Curb and Gutter
Dec 5, 202015 galRoot Intrusion—Street/Curb and Gutter
Nov 28, 202025 galGrease / FOG—Street/Curb and Gutter
Nov 28, 20208 galRoot Intrusion—Street/Curb and Gutter
Nov 19, 202031 galRoot Intrusion—Street/Curb and Gutter
Nov 7, 2020549 galGrease / FOG—Street/Curb and Gutter
Oct 20, 202062 galRoot Intrusion—Street/Curb and Gutter
Oct 18, 202024 galRoot Intrusion—Street/Curb and Gutter
Oct 3, 20204 galRoot Intrusion—Street/Curb and Gutter
Oct 2, 202073 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Sep 30, 20208 galEquipment Failure—Street/Curb and Gutter
Sep 28, 202057 galGrease / FOG—Street/Curb and Gutter
Sep 22, 202047 galEquipment Failure—Street/Curb and Gutter
Sep 19, 20201 galEquipment Failure—Paved Surface
Aug 26, 20207 galEquipment Failure—Street/Curb and Gutter
Jul 29, 202023 galEquipment Failure—Street/Curb and Gutter
Jul 25, 202025 galRoot Intrusion—Street/Curb and Gutter
Jun 29, 202024 galRoot Intrusion—Street/Curb and Gutter
Jun 19, 20206 galRoot Intrusion—Street/Curb and Gutter
Jun 1, 20209 galRoot Intrusion—Street/Curb and Gutter
May 25, 202059 galRoot Intrusion—Street/Curb and Gutter
May 24, 202043 galRoot Intrusion—Street/Curb and Gutter
Apr 28, 202058 galGrease / FOG—Paved Surface;Street/Curb and Gutter
Apr 28, 20205 galRoot Intrusion—Street/Curb and Gutter
Apr 25, 20203 galGrease / FOG—Street/Curb and Gutter
Apr 24, 20203 galRoot Intrusion—Street/Curb and Gutter
Apr 20, 20207 galRoot Intrusion—Street/Curb and Gutter
Apr 9, 20206 galOther / Unknown—Street/Curb and Gutter
Apr 1, 20208 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Mar 29, 202017 galEquipment Failure—Paved Surface;Street/Curb and Gutter;Unpaved surface
Mar 26, 202027 galEquipment Failure—Street/Curb and Gutter
Mar 18, 20205 galRoot Intrusion—Street/Curb and Gutter
Mar 18, 20209 galRoot Intrusion—Street/Curb and Gutter
Feb 20, 202012 galRoot Intrusion—Street/Curb and Gutter
Feb 9, 202011 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Feb 9, 2020197 galEquipment Failure—Paved Surface;Street/Curb and Gutter
Feb 8, 202034 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Feb 8, 20202 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 27, 20206 galRoot Intrusion—Street/Curb and Gutter
Jan 20, 202080 galRoot Intrusion—Unpaved surface
Jan 15, 20201 galRoot Intrusion—Street/Curb and Gutter
Jan 5, 202036 galRoot Intrusion—Street/Curb and Gutter
Jan 5, 202013 galRoot Intrusion—Street/Curb and Gutter
Jan 3, 20209 galRoot Intrusion—Street/Curb and Gutter
Jan 1, 20204 galRoot Intrusion—Street/Curb and Gutter
Dec 21, 20196 galEquipment Failure—Street/Curb and Gutter
Dec 16, 20195 galRoot Intrusion—Street/Curb and Gutter
Dec 15, 20191 galRoot Intrusion—Unpaved surface
Dec 7, 201911 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Dec 6, 20196 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Nov 28, 20195 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Nov 11, 20196 galRoot Intrusion—Street/Curb and Gutter
Nov 10, 201918 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Nov 1, 20199 galOther / Unknown—Street/Curb and Gutter
Oct 28, 20196 galRoot Intrusion—Street/Curb and Gutter
Oct 16, 201937 galRoot Intrusion—Street/Curb and Gutter
Oct 16, 201936 galRoot Intrusion—Street/Curb and Gutter
Oct 7, 20191 galRoot Intrusion—Street/Curb and Gutter
Oct 6, 201968 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Oct 4, 201910 galRoot Intrusion—Street/Curb and Gutter
Oct 2, 20195 galRoot Intrusion—Street/Curb and Gutter
Oct 1, 20196 galRoot Intrusion—Street/Curb and Gutter
Oct 1, 201933 galEquipment Failure—Street/Curb and Gutter
Sep 25, 20194 galRoot Intrusion—Street/Curb and Gutter
Sep 21, 20193 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Sep 11, 20193 galRoot Intrusion—Street/Curb and Gutter
Sep 10, 20195 galEquipment Failure—Street/Curb and Gutter
Sep 9, 201979 galRoot Intrusion—Street/Curb and Gutter
Aug 29, 20193 galRoot Intrusion—Street/Curb and Gutter
Aug 22, 20195 galRoot Intrusion—Street/Curb and Gutter
Aug 12, 20197 galRoot Intrusion—Street/Curb and Gutter

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