All rankings
California · California (CIWQS)
Los Angeles Cnty Sanitation Districts
F
Usually reaches water
Reported events
74
Total volume
10.8M gal
Reached waterways
41 (55%)
Reporting since
2007
What caused the overflows
Other / Unknown
33
Equipment Failure
13
Rainfall / Flooding
11
Capacity Issue
9
Grease / FOG
6
Root Intrusion
2
Reported overflow events (showing 74 of 74)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Feb 24, 2026 | 12K gal | Equipment Failure | — | — |
| Jan 27, 2026 | 600 gal | Other / Unknown | — | — |
| Jan 10, 2026 | 15K gal | Grease / FOG | Yes | Rio Hondo River, Los Angeles River, Pacific Ocean |
| Jan 10, 2026 | 15K gal | Grease / FOG | Yes | Rio Hondo River, Los Angeles River, Pacific Ocean |
| Dec 26, 2025 | 21K gal | Equipment Failure | Yes | Los Cerritos Channel, Pacific Ocean |
| Dec 26, 2025 | 21K gal | Equipment Failure | Yes | Los Cerritos Channel, Pacific Ocean |
| Dec 24, 2025 | 27K gal | Rainfall / Flooding | Yes | Dominguez Channel, Los Angeles Harbor, Pacific Ocean |
| Dec 24, 2025 | 205K gal | Rainfall / Flooding | Yes | Dominguez Channel, Los Angeles Harbor, Pacific Ocean |
| Dec 24, 2025 | 27K gal | Rainfall / Flooding | Yes | Dominguez Channel, Los Angeles Harbor, Pacific Ocean |
| Dec 24, 2025 | 169K gal | Rainfall / Flooding | Yes | Dominguez Channel, Los Angeles Harbor, Pacific Ocean |
| Sep 26, 2025 | 7K gal | Other / Unknown | — | — |
| Aug 6, 2025 | 297 gal | Grease / FOG | — | — |
| Jul 23, 2025 | 60K gal | Other / Unknown | — | — |
| Apr 25, 2025 | 440 gal | Other / Unknown | — | — |
| Apr 23, 2025 | 100 gal | Other / Unknown | Yes | Alhambra Wash |
| Mar 14, 2025 | 475 gal | Grease / FOG | Yes | Bouton Creek, Los Cerritos Channel, Alamitos Bay, Pacific Ocean |
| Aug 28, 2024 | 5K gal | Root Intrusion | — | — |
| Aug 24, 2024 | 15K gal | Other / Unknown | — | — |
| Apr 2, 2024 | 620 gal | Other / Unknown | — | — |
| Feb 6, 2024 | 23K gal | Rainfall / Flooding | Yes | Coyote Creek |
| Feb 6, 2024 | 30K gal | Rainfall / Flooding | Yes | Coyote Creek |
| Feb 6, 2024 | 23K gal | Rainfall / Flooding | Yes | Coyote Creek |
| Feb 5, 2024 | 49K gal | Capacity Issue | Yes | Colorado Lagoon, Alamitos Bay, Pacific Ocean |
| Feb 4, 2024 | 109K gal | Rainfall / Flooding | Yes | Los Angeles River |
| Feb 4, 2024 | 65K gal | Rainfall / Flooding | Yes | Los Angeles River, Pacific Ocean |
| Feb 4, 2024 | 43K gal | Rainfall / Flooding | Yes | Los Angeles River |
| Feb 4, 2024 | 8.0M gal | Capacity Issue | Yes | Compton Creek, Los Angeles River, Dominguez Channel, Los Angeles Harbor, Pacific Ocean |
| Feb 1, 2024 | 20K gal | Capacity Issue | Yes | Colorado Lagoon, Alamitos Bay, Pacific Ocean |
| Feb 1, 2024 | 39K gal | Capacity Issue | Yes | Colorado Lagoon, Alamitos Bay, Pacific Ocean |
| Feb 1, 2024 | 23K gal | Rainfall / Flooding | Yes | Machado Lake |
| Jan 31, 2024 | 2K gal | Other / Unknown | — | — |
| Aug 24, 2023 | 10K gal | Equipment Failure | — | — |
| Aug 11, 2023 | 6K gal | Equipment Failure | — | — |
| Jul 31, 2023 | 385 gal | Grease / FOG | — | — |
| Jun 15, 2023 | 8K gal | Equipment Failure | — | — |
| Apr 20, 2023 | 540K gal | Equipment Failure | Yes | Other (specify below) |
| Mar 15, 2023 | 10K gal | Capacity Issue | Yes | Separate Storm Drain;Surface Water |
| Mar 15, 2023 | 29K gal | Capacity Issue | Yes | Separate Storm Drain;Surface Water |
| Mar 15, 2023 | 84 gal | Capacity Issue | Yes | Separate Storm Drain;Surface Water |
| Jan 10, 2023 | 8K gal | Capacity Issue | Yes | Separate Storm Drain;Surface Water |
| Nov 8, 2022 | 2K gal | Capacity Issue | Yes | Drainage Channel |
| Sep 6, 2022 | 11K gal | Root Intrusion | Yes | Beach |
| Nov 17, 2021 | 40K gal | Other / Unknown | Yes | Drainage Channel |
| Dec 25, 2020 | 224K gal | Other / Unknown | Yes | Other (specify below) |
| Apr 30, 2020 | 552 gal | Other / Unknown | — | Unpaved surface |
| Apr 18, 2020 | 214 gal | Other / Unknown | — | Unpaved surface |
| Mar 2, 2020 | 200 gal | Equipment Failure | — | Other (specify below) |
| Feb 27, 2020 | 20 gal | Equipment Failure | — | Other (specify below) |
| Jan 8, 2020 | 5 gal | Equipment Failure | — | Paved Surface |
| Apr 3, 2019 | 5 gal | Other / Unknown | — | Street/Curb and Gutter;Unpaved surface |
| Feb 14, 2019 | 650 gal | Other / Unknown | — | Paved Surface;Street/Curb and Gutter |
| Feb 2, 2019 | 5K gal | Other / Unknown | Yes | Paved Surface;Separate Storm Drain;Surface Water |
| Jan 10, 2019 | 10 gal | Equipment Failure | — | Paved Surface |
| Feb 17, 2017 | 7K gal | Other / Unknown | Yes | Other (specify below) |
| Jan 22, 2017 | 9K gal | Other / Unknown | Yes | Other (specify below) |
| Jan 22, 2017 | 14K gal | Other / Unknown | Yes | Other (specify below) |
| Jan 22, 2017 | 11K gal | Other / Unknown | Yes | Other (specify below) |
| Jan 22, 2017 | 761 gal | Other / Unknown | Yes | Other (specify below) |
| Aug 17, 2016 | 24K gal | Grease / FOG | — | Other (specify below) |
| Sep 15, 2015 | 440K gal | Other / Unknown | Yes | Beach;Surface Water |
| Jan 27, 2015 | 720 gal | Other / Unknown | — | Other (specify below) |
| Jan 21, 2014 | 424 gal | Equipment Failure | — | Other (specify below) |
| Nov 1, 2013 | 6K gal | Other / Unknown | — | Other (specify below);Unpaved surface |
| Oct 17, 2013 | 3K gal | Other / Unknown | — | Other (specify below) |
| Sep 16, 2013 | 545 gal | Other / Unknown | Yes | Other (specify below) |
| May 5, 2012 | 300 gal | Equipment Failure | — | Unpaved surface |
| Dec 20, 2010 | 200 gal | Other / Unknown | — | Other (specify below) |
| Feb 8, 2010 | 117K gal | Other / Unknown | Yes | Other (specify below) |
| Jan 18, 2010 | 215K gal | Other / Unknown | Yes | Surface water |
| Jul 13, 2009 | 100 gal | Other / Unknown | — | Other (specify below) |
| Jan 15, 2009 | 800 gal | Other / Unknown | Yes | Other (specify below) |
| Jun 16, 2008 | 10 gal | Other / Unknown | — | Other (specify below) |
| Feb 18, 2008 | 350 gal | Other / Unknown | — | Other (specify below) |
| May 24, 2007 | 250 gal | Other / Unknown | — | Street/curb and gutter;Other (specify below) |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.