All rankings
California · California (CIWQS)
Sonoma County Water Agency (SCWA)
D
Frequently reaches water
Reported events
36
Total volume
2.5M gal
Reached waterways
16 (44%)
Reporting since
2007
What caused the overflows
Equipment Failure
10
Root Intrusion
8
Rainfall / Flooding
6
Grease / FOG
5
Capacity Issue
4
Other / Unknown
3
Reported overflow events (showing 36 of 36)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Jan 5, 2026 | 212 gal | Rainfall / Flooding | Yes | Fife Creek |
| Nov 23, 2024 | 4K gal | Capacity Issue | Yes | Russian River |
| May 14, 2023 | 11 gal | Root Intrusion | — | Paved Surface |
| Aug 9, 2022 | 10 gal | Root Intrusion | — | Paved Surface |
| Nov 30, 2021 | 5K gal | Equipment Failure | — | Building or Structure;Paved Surface;Street/Curb and Gutter;Unpaved surface |
| Nov 25, 2021 | 17K gal | Equipment Failure | — | Paved Surface;Unpaved surface |
| Oct 17, 2021 | 13 gal | Root Intrusion | — | Unpaved surface |
| Aug 8, 2021 | 10 gal | Root Intrusion | — | Paved Surface |
| Mar 20, 2021 | 25 gal | Grease / FOG | — | Paved Surface |
| Feb 26, 2019 | 348K gal | Rainfall / Flooding | Yes | Surface Water;Unpaved surface |
| Feb 26, 2019 | 483K gal | Rainfall / Flooding | Yes | Surface Water |
| Feb 14, 2019 | 201K gal | Capacity Issue | Yes | Surface Water |
| Feb 14, 2019 | 106 gal | Capacity Issue | Yes | Surface Water |
| Aug 6, 2018 | 5 gal | Other / Unknown | — | Unpaved surface |
| Jun 22, 2018 | 100 gal | Root Intrusion | — | Unpaved surface |
| Jul 8, 2017 | 5 gal | Root Intrusion | — | Paved Surface |
| Mar 11, 2017 | 495 gal | Grease / FOG | — | Unpaved surface |
| Feb 7, 2017 | 195K gal | Rainfall / Flooding | Yes | Surface Water |
| Feb 7, 2017 | 339K gal | Capacity Issue | Yes | Surface Water |
| Jan 11, 2017 | 1K gal | Rainfall / Flooding | Yes | Surface Water |
| Jan 11, 2017 | 8K gal | Rainfall / Flooding | Yes | Surface Water |
| Jan 9, 2017 | 770K gal | Equipment Failure | Yes | Surface Water |
| Dec 16, 2015 | 5 gal | Other / Unknown | — | Unpaved surface |
| Dec 1, 2015 | 50 gal | Root Intrusion | — | Unpaved surface |
| Jul 5, 2015 | 332 gal | Equipment Failure | — | Paved Surface |
| Dec 29, 2014 | 540 gal | Equipment Failure | — | Unpaved surface |
| Jun 30, 2014 | 194 gal | Root Intrusion | — | Paved Surface |
| Feb 13, 2014 | 132K gal | Equipment Failure | Yes | Beach;Surface Water |
| Feb 12, 2014 | 450 gal | Equipment Failure | Yes | Surface Water |
| Sep 27, 2013 | 360 gal | Equipment Failure | — | Unpaved surface |
| May 24, 2013 | 1K gal | Other / Unknown | Yes | Separate storm drain |
| Nov 25, 2012 | 420 gal | Grease / FOG | Yes | Surface water |
| Nov 25, 2012 | 84 gal | Grease / FOG | Yes | Surface water |
| Dec 15, 2010 | 15 gal | Equipment Failure | — | Unpaved surface |
| Dec 22, 2008 | 15 gal | Grease / FOG | — | Unpaved surface |
| Aug 9, 2007 | 74 gal | Equipment Failure | — | Unpaved surface |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.