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California · California (CIWQS)

San Luis Obispo City

D
Frequently reaches water
Reported events
157
Total volume
367K gal
Reached waterways
69 (44%)
Reporting since
2007

What caused the overflows

Root Intrusion
77
Equipment Failure
47
Other / Unknown
22
Grease / FOG
6
Capacity Issue
3
Rainfall / Flooding
2

Reported overflow events (showing 157 of 157)

DateVolumeCauseReached waterReceiving water
Feb 24, 2026413 galRoot IntrusionYesCarla Creek
Jan 29, 2026123 galRoot Intrusion——
Dec 15, 2025123 galRoot Intrusion——
Nov 17, 20252K galEquipment FailureYesSan Luis Creek
Nov 14, 2025922 galRoot IntrusionYesSan Luis Creek
Sep 18, 2025431 galEquipment Failure——
Jan 24, 202535 galEquipment FailureYesSan Luis Creek
Jul 23, 2024911 galRoot IntrusionYesSan Luis Creek
Apr 19, 20233 galGrease / FOG—Separate Storm Drain
Mar 26, 2023187 galEquipment Failure—Paved Surface
Jan 27, 202399 galEquipment Failure—Separate Storm Drain
Dec 31, 20224K galGrease / FOGYesSeparate Storm Drain
Dec 26, 20225 galRoot IntrusionYesSeparate Storm Drain
Nov 21, 2022446 galEquipment Failure—Separate Storm Drain
Nov 12, 2022369 galRoot Intrusion—Unpaved surface
Nov 10, 2022390 galEquipment Failure—Separate Storm Drain
Aug 28, 2022495 galRoot Intrusion—Unpaved surface
Aug 15, 2022103K galOther / UnknownYesSurface Water
Aug 7, 202210 galRoot Intrusion—Unpaved surface
Jun 21, 2022258 galEquipment Failure—Paved Surface
Apr 26, 20222K galEquipment Failure—Separate Storm Drain
Apr 24, 202246 galEquipment FailureYesDrainage Channel
Feb 5, 2022282 galRoot Intrusion—Paved Surface
Feb 2, 2022359 galEquipment Failure—Unpaved surface
Nov 26, 202144 galEquipment Failure—Unpaved surface
Oct 19, 2021175 galEquipment FailureYesBeach;Surface Water
Oct 2, 20211K galRoot Intrusion—Building or Structure;Drainage Channel;Unpaved surface
Oct 1, 202121 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Jul 21, 2021125 galEquipment Failure—Paved Surface;Unpaved surface
Jun 22, 2021634 galRoot IntrusionYesSeparate Storm Drain;Street/Curb and Gutter;Unpaved surface
Jun 6, 20214K galEquipment FailureYesDrainage Channel
Mar 17, 20213K galGrease / FOGYesSurface Water;Unpaved surface
Mar 5, 2021117 galOther / Unknown—Unpaved surface
Mar 5, 2021213 galEquipment Failure—Unpaved surface
Oct 27, 2020330 galEquipment Failure—Unpaved surface
Oct 17, 20202K galEquipment FailureYesBuilding or Structure;Drainage Channel;Paved Surface;Separate Storm Drain;Surface Water;Unpaved surface
Sep 21, 202055 galEquipment Failure—Drainage Channel;Street/Curb and Gutter
Sep 5, 20204K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Mar 8, 202025K galRoot IntrusionYesBuilding or Structure;Paved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Feb 21, 2020650 galOther / UnknownYesSurface Water;Unpaved surface
Jan 20, 20202K galOther / UnknownYesPaved Surface;Surface Water;Unpaved surface
Sep 8, 20193K galEquipment FailureYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
May 14, 2019900 galEquipment FailureYesSurface Water;Unpaved surface
Apr 21, 20191K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter
Feb 18, 20192K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Unpaved surface
Jan 17, 201912K galCapacity IssueYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water
Jan 16, 20193K galRoot IntrusionYesPaved Surface;Separate Storm Drain;Street/Curb and Gutter;Surface Water;Unpaved surface
Dec 13, 201827 galRoot Intrusion—Separate Storm Drain
Dec 3, 2018300 galRoot IntrusionYesPaved Surface;Separate Storm Drain;Surface Water
Oct 29, 20182K galEquipment FailureYesSurface Water
Aug 21, 201815 galRoot Intrusion—Building or Structure;Other (specify below)
Jul 28, 2018300 galGrease / FOG—Unpaved surface
Feb 21, 201828 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Dec 14, 201750 galRoot Intrusion—Paved Surface;Unpaved surface
Oct 27, 20172K galEquipment FailureYesDrainage Channel;Paved Surface;Separate Storm Drain;Street/Curb and Gutter
Sep 20, 20172K galEquipment FailureYesSurface Water;Unpaved surface
May 18, 2017300 galRoot IntrusionYesStreet/Curb and Gutter;Surface Water
Feb 21, 20173K galCapacity IssueYesSurface Water
Feb 17, 20174K galCapacity IssueYesSurface Water
Feb 16, 2017250 galGrease / FOGYesSurface Water
Jan 22, 201736K galRainfall / FloodingYesSurface Water
Jan 22, 20176K galRoot IntrusionYesSurface Water
Jan 20, 201732K galRainfall / FloodingYesSurface Water
Nov 29, 2016240 galOther / Unknown—Separate Storm Drain
Nov 2, 201617 galRoot Intrusion—Street/Curb and Gutter
Sep 24, 201621 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Jul 20, 2016250 galRoot Intrusion—Separate Storm Drain;Street/Curb and Gutter
Mar 30, 2016295 galRoot IntrusionYesSeparate Storm Drain;Street/Curb and Gutter
Feb 27, 2016160 galRoot IntrusionYesSeparate Storm Drain
Jan 31, 201614K galOther / UnknownYesSurface Water
Nov 22, 201523 galRoot Intrusion—Unpaved surface
Oct 12, 201520 galEquipment Failure—Other (specify below)
Oct 4, 2015116 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Sep 16, 201525 galRoot Intrusion—Unpaved surface
Aug 24, 20152 galRoot Intrusion—Street/Curb and Gutter
Jul 18, 201540 galOther / Unknown—Paved Surface
Jun 13, 201560 galOther / Unknown—Unpaved surface
Jun 13, 201590 galRoot Intrusion—Street/Curb and Gutter
Jun 7, 2015350 galOther / UnknownYesBuilding or Structure;Other (specify below)
Feb 9, 20151K galRoot IntrusionYesSurface Water
Feb 9, 2015100 galOther / UnknownYesSeparate Storm Drain
Jan 6, 20155K galEquipment Failure—Other (specify below)
Dec 25, 2014800 galRoot IntrusionYesSurface Water
Dec 16, 2014200 galRoot IntrusionYesSurface Water
Dec 15, 2014400 galRoot IntrusionYesSurface Water
Oct 9, 2014100 galEquipment Failure—Building or Structure;Drainage Channel
Oct 9, 2014100 galEquipment Failure—Building or Structure;Other (specify below)
Sep 19, 201450 galEquipment Failure—Street/Curb and Gutter
Sep 7, 2014150 galRoot Intrusion—Street/Curb and Gutter
May 28, 201450 galEquipment Failure—Paved Surface
Mar 6, 201415 galRoot Intrusion—Building or Structure
Feb 6, 20142K galRoot IntrusionYesStreet/Curb and Gutter
Jan 28, 201415 galOther / Unknown—Other (specify below)
Jan 21, 201450 galRoot Intrusion—Other (specify below)
Jan 17, 2014250 galOther / Unknown—Drainage Channel
Jan 8, 2014500 galRoot IntrusionYesSurface Water
Jan 6, 20141K galEquipment FailureYesDrainage Channel
Jan 2, 20141K galEquipment Failure—Paved Surface;Separate Storm Drain
Dec 23, 201350 galEquipment Failure—Other (specify below)
Nov 24, 2013350 galRoot IntrusionYesStreet/Curb and Gutter;Surface Water
Oct 17, 2013500 galRoot Intrusion—Building or Structure
Oct 16, 201335 galRoot Intrusion—Street/Curb and Gutter
Jul 9, 2013100 galRoot Intrusion—Building or structure
Jul 9, 201350 galRoot Intrusion—Building or structure
May 11, 2013100 galRoot Intrusion—Street/curb and gutter
Apr 27, 201330 galRoot Intrusion—Other (specify below)
Dec 7, 201241 galEquipment Failure—Separate storm drain;Street/curb and gutter
Nov 2, 20123K galRoot Intrusion—Unpaved surface
Oct 31, 2012250 galEquipment Failure—Street/curb and gutter
Oct 29, 201230 galRoot Intrusion—Street/curb and gutter
Oct 20, 20122K galOther / UnknownYesSurface water
Oct 1, 2012200 galRoot IntrusionYesSeparate storm drain
Sep 27, 201230 galRoot Intrusion—Street/curb and gutter
Aug 6, 2012500 galRoot IntrusionYesSurface water
Jul 24, 201230 galEquipment FailureYesSurface water
Jan 1, 2012125 galEquipment Failure—Unpaved surface
Nov 23, 2011400 galOther / Unknown—Other (specify below)
Nov 2, 2011600 galEquipment FailureYesSurface water;Other (specify below)
Oct 10, 20111K galRoot IntrusionYesSeparate storm drain
Jul 18, 20112K galRoot Intrusion—Unpaved surface
Jun 20, 2011400 galOther / UnknownYesSurface water
May 5, 201150 galEquipment Failure—Separate storm drain;Street/curb and gutter
Dec 19, 20108K galOther / UnknownYesSurface water
Jun 8, 2010100 galRoot Intrusion—Street/curb and gutter
May 31, 201025 galRoot Intrusion—Street/curb and gutter
May 22, 2010900 galOther / Unknown—Other (specify below)
May 17, 2010250 galOther / Unknown—Other (specify below)
Feb 5, 2010800 galOther / UnknownYesSurface water
Jan 11, 20101K galEquipment FailureYesSurface water
Oct 20, 2009750 galRoot Intrusion—Street/curb and gutter
Oct 19, 2009100 galRoot Intrusion—Unpaved surface
May 20, 200925 galRoot Intrusion—Other (specify below)
Apr 17, 2009250 galOther / UnknownYesSurface water
Mar 13, 200950 galRoot IntrusionYesStorm drain
Mar 1, 20099K galEquipment FailureYesSurface water
Feb 11, 200930 galRoot Intrusion—Building or structure
Feb 9, 2009100 galRoot IntrusionYesStorm drain
Feb 3, 200930K galEquipment FailureYesOther (specify below)
Feb 2, 2009100 galRoot Intrusion—Street/curb and gutter
Nov 11, 200850 galOther / Unknown—Street/curb and gutter
Oct 29, 2008500 galRoot Intrusion—Street/curb and gutter
Sep 14, 20083K galEquipment FailureYesSurface water
Aug 15, 2008500 galRoot Intrusion—Building or structure
May 27, 2008200 galEquipment Failure—Storm drain
May 15, 200850 galRoot IntrusionYesSurface water
Mar 29, 200835 galRoot Intrusion—Street/curb and gutter
Feb 28, 200835 galRoot Intrusion—Other paved surface
Jan 24, 200835 galRoot Intrusion—Other (specify below)
Jan 23, 2008500 galGrease / FOGYesOther (specify below)
Oct 30, 20075 galEquipment Failure—Other (specify below)
Oct 24, 2007200 galEquipment Failure—Unpaved surface
Oct 1, 2007100 galRoot Intrusion—Street/curb and gutter
Sep 17, 200730 galRoot Intrusion—Other (specify below)
Aug 15, 2007500 galEquipment Failure—Other (specify below)
Aug 7, 2007500 galRoot IntrusionYesSeparate storm drain
Jul 16, 2007600 galOther / UnknownYesStorm drain
May 7, 200740 galRoot IntrusionYesStorm drain

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