All rankings
California · California (CIWQS)
Tuolumne City SD
C
Often reaches water
Reported events
33
Total volume
65K gal
Reached waterways
7 (21%)
Reporting since
2007
What caused the overflows
Root Intrusion
9
Other / Unknown
9
Equipment Failure
8
Grease / FOG
5
Rainfall / Flooding
2
Reported overflow events (showing 33 of 33)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Feb 1, 2026 | 40 gal | Equipment Failure | — | Turnback Creek |
| Jul 18, 2025 | 50 gal | Root Intrusion | — | — |
| May 7, 2025 | 2K gal | Root Intrusion | Yes | Unnamed drainage |
| Feb 13, 2025 | 50 gal | Equipment Failure | — | — |
| Jan 2, 2025 | 278 gal | Equipment Failure | — | Turnback Creek |
| Nov 1, 2023 | 61 gal | Root Intrusion | — | — |
| Aug 28, 2023 | 150 gal | Other / Unknown | — | — |
| Dec 10, 2022 | 40 gal | Equipment Failure | — | Unpaved surface |
| Jan 17, 2022 | 250 gal | Grease / FOG | — | Paved Surface;Unpaved surface |
| Nov 23, 2021 | 1K gal | Grease / FOG | — | Unpaved surface |
| Jan 14, 2021 | 240 gal | Root Intrusion | — | Unpaved surface |
| Mar 6, 2017 | 37 gal | Root Intrusion | Yes | Drainage Channel;Paved Surface;Separate Storm Drain;Unpaved surface |
| Feb 16, 2016 | 15K gal | Other / Unknown | — | Other (specify below) |
| Nov 17, 2015 | 20 gal | Root Intrusion | — | Unpaved surface |
| Aug 25, 2015 | 70 gal | Other / Unknown | — | Unpaved surface |
| Apr 7, 2015 | 486 gal | Equipment Failure | Yes | Separate Storm Drain;Surface Water |
| Jan 31, 2015 | 53 gal | Root Intrusion | — | Unpaved surface |
| Jan 9, 2015 | 900 gal | Equipment Failure | Yes | Drainage Channel;Unpaved surface |
| Apr 10, 2014 | 35 gal | Root Intrusion | — | Street/Curb and Gutter |
| Dec 2, 2013 | 42 gal | Equipment Failure | — | Unpaved surface |
| Aug 30, 2013 | 66 gal | Grease / FOG | — | Unpaved surface |
| Jun 25, 2013 | 52 gal | Other / Unknown | — | Unpaved surface |
| May 5, 2013 | 75 gal | Grease / FOG | — | Unpaved surface |
| Jun 9, 2012 | 150 gal | Equipment Failure | — | Other (specify below) |
| Feb 19, 2012 | 320 gal | Grease / FOG | — | Separate storm drain |
| Dec 19, 2010 | 20K gal | Rainfall / Flooding | Yes | Other (specify below) |
| Dec 19, 2010 | 20K gal | Rainfall / Flooding | Yes | Other (specify below) |
| Dec 28, 2009 | 800 gal | Other / Unknown | — | Unpaved surface |
| May 7, 2009 | 900 gal | Other / Unknown | Yes | Other paved surface |
| Mar 13, 2009 | 50 gal | Other / Unknown | — | Unpaved surface |
| Mar 7, 2008 | 500 gal | Other / Unknown | — | Unpaved surface |
| Mar 7, 2008 | 500 gal | Other / Unknown | — | Unpaved surface |
| Oct 19, 2007 | 100 gal | Root Intrusion | — | Unpaved surface |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.