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California · California (CIWQS)

San Jose City

B
Seldom reaches water
Reported events
1,805
Total volume
2.2M gal
Reached waterways
207 (11%)
Reporting since
2007

What caused the overflows

Grease / FOG
416
Equipment Failure
279
Root Intrusion
191
Other / Unknown
113
Rainfall / Flooding
1

Reported overflow events (showing 200 of 1,805)

DateVolumeCauseReached waterReceiving water
Jun 8, 20262K galGrease / FOGYesGreystone Creek
Mar 31, 20262K galGrease / FOGYesGuadalupe River
Mar 6, 2026240 galRoot Intrusion——
Mar 3, 2026548 galRoot Intrusion——
Mar 3, 2026331 galGrease / FOG——
Feb 3, 20263K galEquipment FailureYesYerba Buena Creek
Jan 27, 2026610 galGrease / FOGYesAlamitos Creek
Dec 22, 2025605 galGrease / FOGYesThompson Creek
Dec 21, 2025787 galGrease / FOG——
Nov 21, 2025344 galGrease / FOG——
Nov 18, 20254K galGrease / FOGYesGuadalupe River
Nov 17, 2025885 galGrease / FOGYesSouth Baab Creek
Nov 7, 2025197 galGrease / FOG——
Oct 7, 2025273 galGrease / FOG——
Sep 16, 20254K galRoot IntrusionYesSan Tomas Aquino Creek
Sep 12, 2025518 galRoot IntrusionYesPenitencia Creek
Sep 10, 202511K galEquipment FailureYesGuadalupe River
Sep 3, 2025330 galGrease / FOG——
Sep 1, 2025136 galGrease / FOG——
Jul 11, 20252K galGrease / FOGYesGuadalupe River
Jun 25, 2025613 galRoot Intrusion——
Jun 8, 20257K galGrease / FOGYesLower Silver Creek
May 22, 202570 galGrease / FOG——
May 18, 2025470 galGrease / FOGYesQuimby creek
May 15, 2025108 galEquipment Failure——
May 10, 2025103 galGrease / FOG——
Apr 28, 202514K galEquipment FailureYesThompson Creek
Apr 19, 2025250 galEquipment Failure——
Apr 14, 2025107 galEquipment Failure——
Apr 2, 2025140 galOther / Unknown——
Mar 26, 2025435 galGrease / FOG——
Mar 24, 20251K galGrease / FOGYesSan Tomas Aquino Creek
Mar 22, 2025750 galRoot IntrusionYesRoss Creek
Mar 18, 202511K galGrease / FOGYesLos Gatos Creek
Feb 22, 2025325 galGrease / FOG——
Jan 23, 2025395 galEquipment Failure——
Jan 15, 2025330 galEquipment FailureYesCoyote Creek
Dec 21, 202448K galGrease / FOG——
Dec 8, 2024644 galGrease / FOG——
Nov 30, 202476K galGrease / FOGYesRoss Creek
Nov 18, 202413K galEquipment Failure——
Nov 12, 20244K galGrease / FOGYesBerryyessa Creek
Oct 17, 202450K galEquipment Failure——
Oct 2, 20241K galGrease / FOGYesCoyote Creek
Sep 29, 20242K galEquipment FailureYesGuadalupe River
Sep 18, 20242K galEquipment FailureYesGolf Creek
Jul 3, 202453 galEquipment Failure——
Jul 1, 2024379 galGrease / FOG——
Jun 25, 2024330 galGrease / FOG——
Jun 6, 2024117 galEquipment FailureYesGaudelupe River.
May 22, 20241K galRoot IntrusionYesRoss Creek
May 10, 2024105 galEquipment Failure——
Apr 16, 2024530 galGrease / FOGYesLower Silver Creek
Apr 10, 202416K galGrease / FOGYesSan Tomas Aquino Creek
Apr 7, 202414K galEquipment FailureYesDutard Creek and Pennetencia Creek
Apr 1, 20244K galGrease / FOGYesRuby Creek
Mar 30, 2024186 galRoot Intrusion——
Mar 17, 2024258 galRoot IntrusionYesCalabazas Creek
Jan 18, 2024203 galGrease / FOG——
Jan 13, 202423K galOther / UnknownYesLower Silver Creek
Nov 25, 202371 galGrease / FOG——
Nov 19, 20232K galEquipment FailureYesGuadalupe River
Nov 18, 2023117 galEquipment Failure——
Nov 14, 2023195 galGrease / FOG——
Nov 14, 2023195 galGrease / FOG——
Oct 20, 202368 galOther / Unknown——
Oct 18, 20236K galGrease / FOGYesSierra Creek
Sep 23, 202381 galEquipment Failure——
Sep 10, 20233K galGrease / FOG——
Sep 2, 20235K galEquipment FailureYesGuadalupe River
Aug 7, 2023916 galGrease / FOG——
Jul 19, 202362 galGrease / FOG——
Jun 7, 202395 galGrease / FOG——
Jun 5, 2023240 galEquipment FailureYesBerryessa Creek
May 5, 20233K galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
May 4, 202397 galGrease / FOG——
Apr 10, 202358 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Apr 3, 2023119 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Apr 3, 2023119 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Mar 23, 202313K galEquipment Failure—Unpaved surface
Mar 20, 2023118 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Mar 10, 20232K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Mar 7, 202389 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Mar 3, 202334K galRoot IntrusionYesBuilding or Structure;Paved Surface;Separate Storm Drain;Surface Water
Mar 3, 20232K galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 11, 20235K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Feb 7, 202339 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Feb 6, 20232K galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 14, 20236K galGrease / FOGYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 14, 202338K galRainfall / FloodingYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 8, 20231K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 27, 202232K galGrease / FOGYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 17, 2022540 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Dec 16, 202218 galRoot Intrusion—Street/Curb and Gutter
Dec 7, 2022313 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Nov 23, 20228K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Nov 19, 202221 galGrease / FOG—Paved Surface;Street/Curb and Gutter
Nov 18, 202235 galGrease / FOG—Street/Curb and Gutter
Nov 12, 2022725 galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Nov 11, 2022430 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Oct 30, 2022793 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Oct 26, 2022808 galGrease / FOG—Unpaved surface
Oct 22, 202240 galGrease / FOG—Street/Curb and Gutter
Oct 20, 2022520 galEquipment FailureYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Sep 13, 202253 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Sep 7, 20222K galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Sep 1, 20221 galGrease / FOG—Paved Surface
Aug 28, 2022109 galRoot Intrusion—Street/Curb and Gutter
Aug 27, 2022408 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Jul 30, 202222 galGrease / FOG—Street/Curb and Gutter
Jul 30, 202224K galEquipment FailureYesBuilding or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jul 4, 202221 galGrease / FOG—Street/Curb and Gutter
Jul 3, 20221K galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jun 25, 202247 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Jun 21, 20226K galRoot Intrusion—Paved Surface;Separate Storm Drain
Jun 13, 2022920 galGrease / FOG—Paved Surface;Unpaved surface
Jun 6, 2022550 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Jun 4, 2022127 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
May 6, 2022300 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Apr 25, 2022512 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Apr 13, 2022275 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Apr 10, 2022928 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Mar 29, 20221 galEquipment Failure—Other (specify below)
Mar 19, 202215K galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Mar 7, 20222 galRoot Intrusion—Unpaved surface
Feb 20, 202271 galGrease / FOG—Street/Curb and Gutter
Feb 18, 2022996 galEquipment Failure—Building or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 17, 2022119 galOther / Unknown—Street/Curb and Gutter;Unpaved surface
Feb 10, 20221K galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 7, 20221K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Feb 2, 202210 galOther / Unknown—Building or Structure;Unpaved surface
Jan 26, 202246K galEquipment FailureYesSeparate Storm Drain;Surface Water
Jan 23, 2022333 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 9, 20225K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 9, 20222K galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 8, 2022228 galRoot Intrusion—Street/Curb and Gutter
Dec 22, 20211K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 11, 2021175 galRoot IntrusionYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 6, 20216K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Nov 23, 2021336K galEquipment FailureYesSurface Water;Unpaved surface
Nov 10, 2021258 galEquipment Failure—Paved Surface;Unpaved surface
Oct 28, 2021495 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Oct 25, 20211K galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Sep 8, 20211K galGrease / FOGYesBuilding or Structure;Drainage Channel;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Aug 24, 2021421 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Aug 3, 202165K galOther / UnknownYesSeparate Storm Drain;Surface Water
Jul 20, 20216K galRoot Intrusion—Building or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Jul 17, 2021152 galRoot Intrusion—Unpaved surface
Jun 17, 20212K galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jun 16, 202184 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jun 14, 202190 galGrease / FOG—Street/Curb and Gutter;Unpaved surface
Jun 6, 202145 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jun 1, 20215K galEquipment FailureYesBuilding or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
May 29, 2021237 galGrease / FOG—Paved Surface;Street/Curb and Gutter;Unpaved surface
Apr 22, 2021569 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Mar 29, 2021840 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Mar 28, 202123 galEquipment Failure—Other (specify below);Unpaved surface
Mar 6, 20211K galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Mar 4, 202173 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Mar 1, 2021227 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 1, 2021675 galGrease / FOGYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 27, 202136K galGrease / FOGYesBuilding or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Jan 25, 2021653 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 15, 2021459 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 7, 20212K galGrease / FOGYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 28, 2020290 galOther / Unknown—Separate Storm Drain;Street/Curb and Gutter
Dec 27, 2020196 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Dec 6, 20206K galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Nov 30, 202093 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Nov 14, 2020150 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Nov 11, 2020315 galEquipment Failure—Drainage Channel;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Oct 21, 20204K galEquipment FailureYesOther (specify below);Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Oct 6, 202046 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter
Sep 30, 202068 galGrease / FOG—Other (specify below);Paved Surface;Street/Curb and Gutter;Unpaved surface
Sep 30, 202068 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Sep 19, 20206 galEquipment Failure—Unpaved surface
Sep 19, 202037 galOther / Unknown—Building or Structure;Separate Storm Drain;Unpaved surface
Sep 9, 202018 galEquipment Failure—Unpaved surface
Aug 28, 2020303 galRoot Intrusion—Street/Curb and Gutter
Jul 29, 202018 galOther / Unknown—Building or Structure
Jul 22, 202033 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Jul 20, 20206K galEquipment FailureYesBuilding or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jul 16, 202072K galEquipment FailureYesSeparate Storm Drain;Surface Water
Jul 1, 2020750 galRoot IntrusionYesSeparate Storm Drain;Surface Water;Unpaved surface
Jun 28, 2020110 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Jun 25, 2020265 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
May 14, 2020535 galRoot IntrusionYesSeparate Storm Drain;Street/Curb and Gutter;Surface Water
May 1, 20201 galGrease / FOG—Building or Structure
Apr 11, 202022 galRoot Intrusion—Unpaved surface
Mar 19, 2020450 galGrease / FOG—Separate Storm Drain;Street/Curb and Gutter
Mar 17, 20201K galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Mar 5, 202019 galGrease / FOG—Street/Curb and Gutter;Unpaved surface
Mar 4, 2020115 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 13, 2020950 galGrease / FOG—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 2, 2020333 galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 24, 202084 galEquipment Failure—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 8, 2020350 galRoot Intrusion—Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Jan 7, 20205K galOther / Unknown—Building or Structure;Unpaved surface
Jan 5, 20206K galEquipment FailureYesOther (specify below);Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Dec 24, 20199 galEquipment Failure—Street/Curb and Gutter;Unpaved surface

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