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California · California (CIWQS)

San Francisco Public Utilities Commission

A
Rarely reaches water
Reported events
150
Total volume
163.3M gal
Reached waterways
3 (2%)
Reporting since
2020

What caused the overflows

Equipment Failure
78
Root Intrusion
33
Other / Unknown
20
Grease / FOG
10
Rainfall / Flooding
7
Capacity Issue
2

Reported overflow events (showing 150 of 150)

DateVolumeCauseReached waterReceiving water
Jun 13, 20267K galOther / Unknown——
Jun 1, 2026275 galGrease / FOG——
Feb 17, 202614K galRainfall / Flooding——
Feb 17, 202677 galOther / Unknown——
Feb 17, 202677 galOther / Unknown——
Feb 16, 202656K galEquipment Failure——
Jan 15, 2026358 galRoot Intrusion——
Jan 11, 202614K galRoot Intrusion——
Jan 3, 202612.9M galEquipment FailureYes—
Jan 3, 20261.0M galEquipment Failure——
Dec 31, 202521K galRoot Intrusion——
Dec 30, 2025270 galEquipment Failure——
Dec 26, 2025629 galEquipment Failure——
Dec 25, 20251.4M galRainfall / Flooding——
Dec 25, 202578K galRainfall / Flooding——
Dec 25, 2025114K galEquipment Failure——
Nov 13, 202529K galEquipment Failure——
Nov 13, 20253K galEquipment Failure——
Nov 7, 2025159 galGrease / FOG——
Oct 13, 202520K galEquipment Failure——
Sep 15, 202528K galEquipment Failure——
Mar 3, 20254K galEquipment Failure——
Feb 19, 2025984K galEquipment Failure——
Feb 13, 2025140K galEquipment Failure——
Feb 13, 20252.6M galEquipment Failure——
Feb 13, 2025260K galEquipment Failure——
Feb 13, 202565K galEquipment Failure——
Feb 4, 2025486K galEquipment Failure——
Feb 4, 2025220K galEquipment Failure——
Feb 4, 2025130K galEquipment Failure——
Jan 31, 2025156 galRoot Intrusion——
Dec 16, 202438K galRoot Intrusion——
Dec 14, 202468K galEquipment Failure——
Dec 14, 20241.2M galEquipment Failure——
Dec 14, 2024660 galRoot Intrusion——
Dec 14, 202418K galEquipment Failure——
Nov 22, 2024830K galEquipment Failure——
Nov 22, 20243.0M galEquipment Failure——
Nov 22, 2024387K galEquipment Failure——
Nov 22, 20241.9M galEquipment Failure——
Nov 22, 20241.1M galEquipment Failure——
Nov 22, 202416K galEquipment Failure——
Nov 22, 2024830K galEquipment Failure——
Nov 14, 202456K galRoot Intrusion——
Oct 22, 202450 galEquipment Failure——
Oct 11, 202450 galOther / Unknown——
Aug 21, 2024400 galOther / Unknown——
Aug 8, 2024600 galGrease / FOG——
May 29, 20242K galEquipment Failure——
May 29, 20242K galEquipment Failure——
May 10, 20243K galOther / Unknown——
May 8, 20243K galOther / Unknown——
May 4, 2024683K galEquipment Failure——
Apr 7, 2024240 galEquipment Failure——
Feb 22, 20241K galEquipment Failure——
Feb 20, 20241.0M galOther / Unknown——
Feb 19, 20241K galGrease / FOG——
Feb 12, 202435K galRoot Intrusion——
Feb 4, 20241.1M galOther / Unknown——
Feb 4, 202422K galEquipment Failure——
Feb 1, 20243K galEquipment Failure——
Jan 31, 2024119 galEquipment Failure——
Jan 31, 2024163K galRoot Intrusion——
Jan 31, 2024119 galEquipment Failure——
Jan 31, 2024458K galEquipment Failure——
Jan 31, 2024956K galEquipment Failure——
Jan 24, 202451K galRoot Intrusion——
Jan 24, 202450K galRoot Intrusion——
Jan 22, 2024117K galOther / Unknown——
Dec 29, 2023102K galEquipment Failure——
Dec 18, 202322K galEquipment Failure——
Dec 18, 202351K galEquipment Failure——
Dec 18, 2023336K galEquipment Failure——
Dec 18, 2023315 galGrease / FOG——
Nov 28, 20232K galRoot Intrusion——
Nov 18, 2023224K galEquipment Failure——
Nov 17, 202337K galGrease / FOG——
Oct 21, 2023630 galRoot Intrusion——
Oct 8, 2023214 galEquipment Failure——
Aug 26, 2023840 galOther / Unknown——
Aug 23, 2023945 galRoot Intrusion——
Jul 1, 20236K galEquipment Failure——
May 2, 2023750 galEquipment Failure—Building or Structure
Mar 28, 2023286K galRainfall / Flooding—Combined Storm Drain (Combined CS only)
Mar 14, 2023631K galEquipment Failure—Combined Storm Drain (Combined CS only);Paved Surface;Street/Curb and Gutter
Mar 14, 2023728K galCapacity Issue—Combined Storm Drain (Combined CS only)
Mar 9, 2023885K galEquipment Failure—Paved Surface
Mar 9, 2023947K galOther / Unknown—Combined Storm Drain (Combined CS only)
Feb 23, 202323K galOther / Unknown—Combined Storm Drain (Combined CS only)
Feb 23, 202356K galEquipment Failure—Other (specify below)
Jan 20, 20233K galEquipment Failure—Combined Storm Drain (Combined CS only)
Jan 19, 202323K galEquipment Failure—Combined Storm Drain (Combined CS only)
Jan 14, 2023481K galRainfall / Flooding—Combined Storm Drain (Combined CS only)
Jan 14, 202317K galRainfall / Flooding—Combined Storm Drain (Combined CS only)
Jan 9, 2023143K galCapacity Issue—Combined Storm Drain (Combined CS only)
Jan 9, 2023258K galOther / Unknown—Combined Storm Drain (Combined CS only)
Jan 4, 202341K galEquipment Failure—Combined Storm Drain (Combined CS only)
Jan 4, 2023131K galEquipment Failure—Combined Storm Drain (Combined CS only)
Dec 31, 202274.3M galEquipment Failure—Combined Storm Drain (Combined CS only)
Dec 31, 202220.3M galEquipment Failure—Combined Storm Drain (Combined CS only)
Dec 31, 20221.4M galEquipment Failure—Combined Storm Drain (Combined CS only)
Dec 31, 202251K galRoot Intrusion—Combined Storm Drain (Combined CS only)
Dec 31, 202218.6M galRainfall / FloodingYesCombined Storm Drain (Combined CS only)
Dec 30, 2022972K galRoot Intrusion—Combined Storm Drain (Combined CS only);Unpaved surface
Dec 27, 202254K galEquipment Failure—Combined Storm Drain (Combined CS only)
Dec 21, 20224K galRoot Intrusion—Unpaved surface
Nov 22, 2022762 galRoot Intrusion—Unpaved surface
Nov 8, 2022701 galRoot Intrusion—Paved Surface;Street/Curb and Gutter;Unpaved surface
Nov 1, 2022529 galRoot Intrusion—Unpaved surface
Oct 6, 2022885 galRoot Intrusion—Combined Storm Drain (Combined CS only)
Sep 14, 2022598 galOther / Unknown—Combined Storm Drain (Combined CS only)
Aug 22, 2022565 galGrease / FOG—Combined Storm Drain (Combined CS only);Paved Surface
Aug 16, 20222 galEquipment Failure—Unpaved surface
May 25, 2022191 galEquipment Failure—Unpaved surface
May 20, 202232 galGrease / FOG—Combined Storm Drain (Combined CS only)
May 11, 2022775 galRoot Intrusion—Unpaved surface
May 9, 2022570 galEquipment Failure—Combined Storm Drain (Combined CS only)
Apr 10, 202218 galEquipment Failure—Combined Storm Drain (Combined CS only);Street/Curb and Gutter
Feb 25, 202297 galGrease / FOG—Building or Structure
Feb 19, 202295 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Feb 16, 202218K galEquipment Failure—Paved Surface;Unpaved surface
Jan 7, 202275 galOther / Unknown—Paved Surface
Dec 21, 20213K galEquipment Failure—Surface Water
Nov 8, 202147K galEquipment Failure—Paved Surface
Oct 24, 20214.9M galOther / UnknownYesCombined Storm Drain (Combined CS only);Separate Storm Drain;Surface Water
Oct 23, 20212.5M galOther / Unknown—Combined Storm Drain (Combined CS only)
Aug 16, 202117 galEquipment Failure—Building or Structure
Jul 10, 20212K galEquipment Failure—Combined Storm Drain (Combined CS only);Paved Surface;Street/Curb and Gutter
Jun 24, 2021805 galRoot Intrusion—Street/Curb and Gutter;Unpaved surface
Jun 5, 20214 galEquipment Failure—Paved Surface
Apr 24, 20213 galRoot Intrusion—Paved Surface;Street/Curb and Gutter
Mar 22, 20218K galRoot Intrusion—Combined Storm Drain (Combined CS only);Drainage Channel;Street/Curb and Gutter
Mar 14, 20211K galRoot Intrusion—Unpaved surface
Mar 10, 20215K galRoot Intrusion—Combined Storm Drain (Combined CS only);Paved Surface;Street/Curb and Gutter;Unpaved surface
Feb 9, 202160 galOther / Unknown—Building or Structure
Feb 5, 2021515 galRoot Intrusion—Unpaved surface
Feb 2, 2021251 galGrease / FOG—Paved Surface
Jan 27, 20213 galRoot Intrusion—Combined Storm Drain (Combined CS only)
Jan 25, 202129 galRoot Intrusion—Unpaved surface
Jan 25, 202114K galEquipment Failure—Combined Storm Drain (Combined CS only);Paved Surface
Jan 15, 20213 galEquipment Failure—Unpaved surface
Jan 4, 20212K galEquipment Failure—Building or Structure
Dec 31, 20204K galRoot Intrusion—Combined Storm Drain (Combined CS only)
Dec 30, 20202K galEquipment Failure—Building or Structure
Sep 27, 20203K galRoot Intrusion—Combined Storm Drain (Combined CS only)
Sep 27, 20207 galEquipment Failure—Building or Structure
Sep 17, 202015 galEquipment Failure—Other (specify below)
Aug 22, 20204K galOther / Unknown—Street/Curb and Gutter
Jul 15, 202055 galEquipment Failure—Combined Storm Drain (Combined CS only)
May 23, 2020744 galEquipment Failure—Unpaved surface

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