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California · California (CIWQS)

SEWER AUTHORITY MID-COASTSIDE

F
Usually reaches water
Reported events
32
Total volume
4.8M gal
Reached waterways
17 (53%)
Reporting since
2008

What caused the overflows

Equipment Failure
22
Other / Unknown
8
Rainfall / Flooding
1
Capacity Issue
1

Reported overflow events (showing 32 of 32)

DateVolumeCauseReached waterReceiving water
Jan 20, 2026433 galEquipment Failure——
Dec 9, 2025251 galOther / Unknown——
Apr 22, 2025586 galOther / Unknown——
Jan 1, 20233.8M galOther / UnknownYesPaved Surface;Surface Water;Unpaved surface
Jan 1, 2023360K galEquipment FailureYesDrainage Channel;Paved Surface;Street/Curb and Gutter;Surface Water;Unpaved surface
Dec 31, 202227K galOther / UnknownYesSurface Water
Dec 31, 202224K galCapacity IssueYesDrainage Channel;Surface Water;Unpaved surface
Dec 31, 202229K galOther / UnknownYesDrainage Channel;Surface Water
Dec 31, 202229K galOther / UnknownYesBeach;Paved Surface;Surface Water
May 9, 202253 galEquipment Failure—Unpaved surface
Mar 9, 202010 galOther / Unknown—Paved Surface
Mar 26, 20193K galOther / Unknown—Unpaved surface
May 16, 2017200 galEquipment Failure—Unpaved surface
Apr 16, 20176K galEquipment Failure—Unpaved surface
Apr 2, 201715K galEquipment FailureYesSurface Water
Mar 1, 2017357K galEquipment FailureYesBeach
Oct 19, 20162K galEquipment Failure—Unpaved surface
Jan 20, 2016625 galEquipment Failure—Paved Surface;Street/Curb and Gutter;Unpaved surface
Dec 13, 2014500 galEquipment Failure—Other (specify below)
Feb 2, 2014693 galEquipment FailureYesDrainage Channel;Paved Surface;Surface Water;Unpaved surface
Sep 4, 20135 galEquipment Failure—Street/curb and gutter
Jan 25, 2012500 galEquipment FailureYesBeach;Surface water
Jan 24, 2012500 galEquipment Failure—Unpaved surface
Jan 21, 20123K galEquipment FailureYesBeach;Separate storm drain;Street/curb and gutter
Nov 24, 2011200 galEquipment FailureYesOther paved surface;Separate storm drain;Surface water
Nov 22, 201120 galEquipment Failure—Other paved surface;Separate storm drain;Street/curb and gutter
Mar 24, 2011870 galEquipment Failure—Other paved surface;Unpaved surface
Dec 19, 20103K galEquipment FailureYesOther paved surface;Separate storm drain;Surface water
Nov 7, 2010600 galEquipment FailureYesBeach;Separate storm drain
Nov 1, 2009500 galEquipment FailureYesOther paved surface;Storm drain;Street/curb and gutter;Unpaved surface
Dec 6, 2008500 galEquipment FailureYesStorm drain;Surface water
Jan 25, 2008133K galRainfall / FloodingYesSurface water

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