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California · California (CIWQS)

San Andreas SD

B
Seldom reaches water
Reported events
97
Total volume
77K gal
Reached waterways
6 (6%)
Reporting since
2007

What caused the overflows

Root Intrusion
45
Other / Unknown
30
Equipment Failure
17
Grease / FOG
5

Reported overflow events (showing 97 of 97)

DateVolumeCauseReached waterReceiving water
Jan 12, 2026235 galRoot Intrusion——
Aug 14, 2025120 galRoot Intrusion——
Aug 7, 2025540 galRoot Intrusion——
Mar 10, 2025500 galRoot Intrusion——
Feb 24, 202511K galRoot IntrusionYesSan Andreas Creek
Nov 17, 2023100 galRoot Intrusion——
Jun 5, 202380 galRoot Intrusion——
Mar 20, 202352 galEquipment Failure—Paved Surface
Feb 16, 202320 galRoot Intrusion—Unpaved surface
Dec 4, 2022150 galRoot Intrusion—Unpaved surface
Sep 4, 2022150 galRoot Intrusion—Drainage Channel
Aug 3, 202250 galRoot Intrusion—Paved Surface
Jun 15, 20225 galRoot Intrusion—Unpaved surface
May 26, 202220 galRoot Intrusion—Paved Surface
Mar 26, 2022200 galRoot Intrusion—Unpaved surface
Jan 3, 202225 galRoot Intrusion—Unpaved surface
Dec 28, 202125 galRoot Intrusion—Unpaved surface
Nov 22, 2021200 galRoot Intrusion—Unpaved surface
Oct 18, 202150 galRoot Intrusion—Unpaved surface
Oct 13, 202150 galRoot Intrusion—Unpaved surface
Oct 7, 2021500 galRoot Intrusion—Paved Surface
Sep 28, 20212K galRoot Intrusion—Unpaved surface
Aug 1, 2021100 galEquipment Failure—Unpaved surface
Jul 22, 2021150 galEquipment Failure—Unpaved surface
Mar 30, 2021250 galRoot Intrusion—Paved Surface
Mar 18, 2021500 galRoot Intrusion—Unpaved surface
Mar 10, 202120 galRoot Intrusion—Unpaved surface
Dec 20, 2020400 galOther / Unknown—Unpaved surface
Nov 6, 2020500 galOther / Unknown—Unpaved surface
Sep 25, 2020900 galRoot Intrusion—Unpaved surface
Jun 16, 202050 galRoot Intrusion—Unpaved surface
May 22, 202050 galRoot Intrusion—Unpaved surface
Apr 2, 202050 galEquipment Failure—Unpaved surface
Dec 25, 201950 galRoot Intrusion—Unpaved surface
Jun 24, 201950 galRoot Intrusion—Paved Surface
May 16, 201950 galRoot Intrusion—Unpaved surface
May 11, 2019100 galEquipment Failure—Paved Surface
Dec 6, 201820 galRoot Intrusion—Paved Surface;Unpaved surface
Oct 2, 2018100 galRoot Intrusion—Unpaved surface
Apr 15, 201850 galGrease / FOG—Unpaved surface
Apr 12, 201850 galEquipment Failure—Unpaved surface
Nov 7, 20175 galRoot Intrusion—Unpaved surface
Aug 25, 201725 galOther / Unknown—Unpaved surface
Feb 27, 201720 galRoot Intrusion—Paved Surface
Oct 17, 201620 galRoot Intrusion—Paved Surface
Sep 27, 201650 galOther / Unknown—Unpaved surface
Jul 27, 201610 galRoot Intrusion—Unpaved surface
Jan 2, 2015100 galEquipment Failure—Paved Surface;Unpaved surface
Dec 10, 2014100 galEquipment Failure—Unpaved surface
Dec 10, 201475 galEquipment Failure—Paved Surface
Dec 8, 201450 galEquipment Failure—Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Sep 29, 2014250 galRoot Intrusion—Drainage Channel;Paved Surface;Unpaved surface
Feb 26, 20142K galEquipment FailureYesSurface Water
Feb 3, 201435K galEquipment FailureYesSurface Water
Jan 23, 20142K galEquipment Failure—Unpaved surface
Dec 10, 2013500 galGrease / FOG—Unpaved surface
Oct 16, 201325 galEquipment Failure—Unpaved surface
Aug 20, 2013200 galRoot Intrusion—Unpaved surface
Aug 10, 2013100 galOther / Unknown—Other paved surface
Aug 10, 2013300 galRoot Intrusion—Unpaved surface
Jul 23, 201315 galOther / Unknown—Other paved surface
May 21, 2013300 galRoot Intrusion—Other paved surface
Feb 15, 2013300 galOther / Unknown—Unpaved surface
Jan 14, 2013100 galOther / Unknown—Other paved surface;Unpaved surface
Oct 19, 2012300 galRoot Intrusion—Other paved surface;Unpaved surface
Sep 19, 201210K galEquipment FailureYesSurface water;Unpaved surface
Dec 17, 20111K galRoot Intrusion—Other paved surface;Unpaved surface
May 31, 201125 galOther / Unknown—Unpaved surface
May 19, 201150 galOther / Unknown—Unpaved surface
May 19, 201120 galOther / Unknown—Unpaved surface
Dec 16, 2010100 galOther / Unknown—Unpaved surface
Nov 1, 2010200 galOther / Unknown—Other paved surface;Street/curb and gutter;Unpaved surface
Apr 25, 2010200 galOther / Unknown—Other paved surface;Street/curb and gutter
Apr 9, 2010225 galEquipment Failure—Unpaved surface
Apr 2, 201055 galRoot Intrusion—Unpaved surface
Jan 28, 201025 galOther / Unknown—Unpaved surface
Nov 25, 2009200 galOther / Unknown—Street/curb and gutter
Nov 5, 2009900 galOther / UnknownYesSurface water;Unpaved surface
Jul 5, 2009100 galOther / Unknown—Unpaved surface
Apr 9, 200920 galOther / Unknown—Unpaved surface
Mar 30, 2009100 galOther / Unknown—Unpaved surface
Mar 25, 2009100 galOther / Unknown—Unpaved surface
Dec 4, 200820 galOther / Unknown—Unpaved surface
Oct 26, 200875 galOther / Unknown—Street/curb and gutter
Jul 19, 200810 galGrease / FOG—Street/curb and gutter
Feb 6, 2008500 galOther / UnknownYesSurface water;Unpaved surface
Dec 30, 2007100 galOther / Unknown—Other paved surface;Unpaved surface
Dec 21, 2007250 galRoot Intrusion—Unpaved surface
Dec 5, 2007200 galGrease / FOG—Unpaved surface
Dec 1, 2007500 galOther / Unknown—Unpaved surface
Nov 27, 200720 galGrease / FOG—Unpaved surface
Nov 20, 200710 galOther / Unknown—Other paved surface
Nov 13, 2007150 galOther / Unknown—Unpaved surface
Nov 13, 200710 galEquipment Failure—Unpaved surface
Nov 12, 20075 galRoot Intrusion—Unpaved surface
Oct 13, 2007750 galOther / Unknown—Unpaved surface
Sep 16, 200720 galOther / Unknown—Unpaved surface

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