All rankings
California · California (CIWQS)
Stockton City MUD
A
Rarely reaches water
Reported events
2,297
Total volume
3.1M gal
Reached waterways
67 (3%)
Reporting since
2007
What caused the overflows
Equipment Failure
471
Root Intrusion
329
Grease / FOG
166
Other / Unknown
25
Rainfall / Flooding
5
Capacity Issue
4
Reported overflow events (showing 200 of 2,297)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Jun 22, 2026 | 900 gal | Grease / FOG | Yes | 5 Mile Slough |
| Jun 5, 2026 | 2K gal | Grease / FOG | — | — |
| Apr 24, 2026 | 300 gal | Equipment Failure | Yes | Smiths Canal |
| Feb 27, 2026 | 46K gal | Grease / FOG | Yes | Mosher Slough |
| Feb 20, 2026 | 150 gal | Grease / FOG | Yes | Mosher Slough |
| Jan 15, 2026 | 2K gal | Other / Unknown | — | — |
| Jan 11, 2026 | 13K gal | Equipment Failure | — | — |
| Jan 7, 2026 | 805 gal | Equipment Failure | — | — |
| Dec 27, 2025 | 440 gal | Equipment Failure | Yes | Calaveras River |
| Dec 22, 2025 | 127 gal | Grease / FOG | — | — |
| Oct 1, 2025 | 793K gal | Other / Unknown | Yes | Mormon Slough |
| Oct 1, 2025 | 793K gal | Other / Unknown | Yes | Mormon Slough |
| May 18, 2025 | 2K gal | Grease / FOG | — | — |
| Mar 11, 2025 | 450 gal | Equipment Failure | — | — |
| Feb 6, 2025 | 9K gal | Grease / FOG | Yes | Yosemite Lake and Smiths Canal |
| Dec 4, 2024 | 352 gal | Grease / FOG | — | — |
| Nov 3, 2024 | 263 gal | Grease / FOG | — | — |
| Aug 15, 2024 | 600 gal | Equipment Failure | — | — |
| May 8, 2024 | 18K gal | Capacity Issue | — | — |
| May 8, 2024 | 55K gal | Equipment Failure | — | — |
| May 7, 2024 | 72 gal | Equipment Failure | — | — |
| Apr 16, 2024 | 200 gal | Grease / FOG | — | — |
| Apr 2, 2024 | 231 gal | Equipment Failure | — | — |
| Mar 6, 2024 | 252 gal | Equipment Failure | — | — |
| Feb 16, 2024 | 80 gal | Grease / FOG | — | — |
| Feb 14, 2024 | 490 gal | Equipment Failure | — | — |
| Jan 18, 2024 | 176 gal | Equipment Failure | — | — |
| Jan 2, 2024 | 61 gal | Grease / FOG | — | — |
| Dec 26, 2023 | 64 gal | Root Intrusion | — | — |
| Dec 6, 2023 | 103 gal | Equipment Failure | — | — |
| Nov 29, 2023 | 66 gal | Equipment Failure | — | — |
| Nov 29, 2023 | 57 gal | Equipment Failure | — | — |
| Nov 27, 2023 | 91 gal | Root Intrusion | — | — |
| Oct 23, 2023 | 60 gal | Equipment Failure | — | — |
| Oct 14, 2023 | 468K gal | Equipment Failure | Yes | White Slough |
| Sep 5, 2023 | 53 gal | Equipment Failure | — | — |
| Aug 1, 2023 | 4K gal | Other / Unknown | — | — |
| May 31, 2023 | 18 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 27, 2023 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 19, 2023 | 191 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 17, 2023 | 8 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 17, 2023 | 24 gal | Root Intrusion | — | Street/Curb and Gutter |
| Apr 15, 2023 | 11 gal | Root Intrusion | — | Street/Curb and Gutter |
| Apr 13, 2023 | 4 gal | Grease / FOG | — | Street/Curb and Gutter |
| Apr 10, 2023 | 20 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 3, 2023 | 11 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 3, 2023 | 38 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 1, 2023 | 8 gal | Root Intrusion | — | Street/Curb and Gutter |
| Mar 25, 2023 | 47 gal | Grease / FOG | — | Paved Surface;Street/Curb and Gutter |
| Mar 17, 2023 | 115 gal | Grease / FOG | — | Separate Storm Drain |
| Mar 8, 2023 | 17 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 8, 2023 | 23 gal | Root Intrusion | — | Street/Curb and Gutter |
| Mar 7, 2023 | 44 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 6, 2023 | 8 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 3, 2023 | 6 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 1, 2023 | 1 gal | Root Intrusion | — | Paved Surface |
| Feb 25, 2023 | 4 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 20, 2023 | 5 gal | Equipment Failure | — | Unpaved surface |
| Feb 16, 2023 | 4 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 16, 2023 | 26K gal | Capacity Issue | Yes | Separate Storm Drain;Street/Curb and Gutter;Surface Water |
| Feb 16, 2023 | 3 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 15, 2023 | 14 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 14, 2023 | 38 gal | Root Intrusion | — | Separate Storm Drain |
| Feb 14, 2023 | 6 gal | Grease / FOG | — | Street/Curb and Gutter |
| Feb 13, 2023 | 6 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 13, 2023 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 8, 2023 | 9 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 7, 2023 | 15 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 6, 2023 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 4, 2023 | 30K gal | Grease / FOG | Yes | Separate Storm Drain;Street/Curb and Gutter;Surface Water |
| Feb 3, 2023 | 2 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 2, 2023 | 11 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 2, 2023 | 6 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jan 30, 2023 | 27 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 29, 2023 | 9 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 28, 2023 | 12K gal | Other / Unknown | — | Other (specify below) |
| Jan 23, 2023 | 5 gal | Grease / FOG | — | Street/Curb and Gutter |
| Jan 20, 2023 | 17 gal | Equipment Failure | — | Separate Storm Drain |
| Jan 16, 2023 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 16, 2023 | 16 gal | Grease / FOG | — | Street/Curb and Gutter |
| Jan 14, 2023 | 3K gal | Capacity Issue | Yes | Surface Water |
| Dec 31, 2022 | 3K gal | Rainfall / Flooding | Yes | Separate Storm Drain;Street/Curb and Gutter;Surface Water |
| Dec 31, 2022 | 38K gal | Rainfall / Flooding | Yes | Separate Storm Drain;Street/Curb and Gutter;Surface Water |
| Dec 24, 2022 | 19 gal | Root Intrusion | — | Street/Curb and Gutter |
| Dec 18, 2022 | 4 gal | Equipment Failure | — | Street/Curb and Gutter |
| Dec 18, 2022 | 1 gal | Root Intrusion | — | Paved Surface |
| Dec 18, 2022 | 17 gal | Equipment Failure | — | Paved Surface |
| Dec 17, 2022 | 1 gal | Equipment Failure | — | Paved Surface |
| Dec 17, 2022 | 2 gal | Root Intrusion | — | Street/Curb and Gutter |
| Dec 15, 2022 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Dec 14, 2022 | 5 gal | Equipment Failure | — | Street/Curb and Gutter |
| Dec 12, 2022 | 23 gal | Grease / FOG | — | Street/Curb and Gutter |
| Dec 9, 2022 | 1 gal | Equipment Failure | — | Street/Curb and Gutter |
| Dec 9, 2022 | 7 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter |
| Dec 9, 2022 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Dec 6, 2022 | 17 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Dec 6, 2022 | 18 gal | Root Intrusion | — | Street/Curb and Gutter |
| Nov 30, 2022 | 14 gal | Equipment Failure | — | Street/Curb and Gutter |
| Nov 30, 2022 | 20 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter |
| Nov 29, 2022 | 17 gal | Root Intrusion | — | Street/Curb and Gutter |
| Nov 26, 2022 | 18 gal | Root Intrusion | — | Paved Surface;Street/Curb and Gutter |
| Nov 24, 2022 | 7 gal | Grease / FOG | — | Paved Surface;Street/Curb and Gutter |
| Nov 24, 2022 | 14 gal | Root Intrusion | — | Paved Surface |
| Nov 21, 2022 | 39 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Nov 18, 2022 | 1 gal | Grease / FOG | — | Paved Surface;Street/Curb and Gutter |
| Nov 17, 2022 | 355 gal | Grease / FOG | — | Paved Surface;Street/Curb and Gutter |
| Nov 17, 2022 | 34 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Nov 14, 2022 | 26 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Nov 14, 2022 | 23 gal | Root Intrusion | — | Street/Curb and Gutter |
| Nov 11, 2022 | 6 gal | Equipment Failure | — | Paved Surface;Street/Curb and Gutter |
| Nov 7, 2022 | 15 gal | Grease / FOG | — | Street/Curb and Gutter |
| Nov 6, 2022 | 4 gal | Root Intrusion | — | Street/Curb and Gutter |
| Nov 6, 2022 | 16 gal | Grease / FOG | — | Street/Curb and Gutter |
| Nov 1, 2022 | 4K gal | Grease / FOG | Yes | Surface Water |
| Oct 31, 2022 | 13 gal | Equipment Failure | — | Separate Storm Drain |
| Oct 30, 2022 | 9 gal | Root Intrusion | — | Street/Curb and Gutter |
| Oct 25, 2022 | 14 gal | Grease / FOG | — | Street/Curb and Gutter |
| Oct 22, 2022 | 8 gal | Equipment Failure | — | Street/Curb and Gutter |
| Oct 18, 2022 | 21 gal | Root Intrusion | — | Other (specify below) |
| Oct 14, 2022 | 31 gal | Grease / FOG | — | Street/Curb and Gutter |
| Oct 6, 2022 | 14 gal | Grease / FOG | — | Separate Storm Drain |
| Oct 1, 2022 | 16 gal | Root Intrusion | — | Street/Curb and Gutter |
| Sep 24, 2022 | 13 gal | Root Intrusion | — | Street/Curb and Gutter |
| Sep 18, 2022 | 8K gal | Grease / FOG | — | Separate Storm Drain;Street/Curb and Gutter |
| Sep 17, 2022 | 5 gal | Root Intrusion | — | Street/Curb and Gutter |
| Sep 16, 2022 | 21 gal | Grease / FOG | — | Separate Storm Drain |
| Sep 16, 2022 | 24 gal | Equipment Failure | — | Separate Storm Drain |
| Sep 15, 2022 | 6 gal | Root Intrusion | — | Street/Curb and Gutter |
| Sep 6, 2022 | 10 gal | Equipment Failure | — | Street/Curb and Gutter |
| Sep 4, 2022 | 5K gal | Grease / FOG | — | Other (specify below);Separate Storm Drain;Street/Curb and Gutter |
| Sep 1, 2022 | 56 gal | Equipment Failure | — | Street/Curb and Gutter |
| Sep 1, 2022 | 3 gal | Grease / FOG | — | Street/Curb and Gutter |
| Aug 21, 2022 | 20K gal | Equipment Failure | — | Separate Storm Drain;Street/Curb and Gutter |
| Aug 21, 2022 | 16 gal | Equipment Failure | Yes | Separate Storm Drain;Street/Curb and Gutter;Surface Water |
| Aug 17, 2022 | 11 gal | Root Intrusion | — | Street/Curb and Gutter |
| Aug 16, 2022 | 33 gal | Equipment Failure | — | Street/Curb and Gutter |
| Aug 15, 2022 | 61 gal | Root Intrusion | — | Street/Curb and Gutter |
| Aug 11, 2022 | 7 gal | Root Intrusion | — | Street/Curb and Gutter |
| Aug 11, 2022 | 101 gal | Grease / FOG | — | Street/Curb and Gutter |
| Aug 8, 2022 | 15 gal | Grease / FOG | — | Street/Curb and Gutter |
| Aug 8, 2022 | 17 gal | Grease / FOG | — | Street/Curb and Gutter |
| Aug 8, 2022 | 50 gal | Equipment Failure | — | Street/Curb and Gutter |
| Aug 5, 2022 | 37 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jul 28, 2022 | 22 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jul 26, 2022 | 94 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jul 26, 2022 | 31 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jul 13, 2022 | 9 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jul 13, 2022 | 4 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jun 30, 2022 | 10 gal | Root Intrusion | — | Separate Storm Drain |
| Jun 28, 2022 | 1 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jun 28, 2022 | 10 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jun 24, 2022 | 6 gal | Equipment Failure | — | Other (specify below) |
| Jun 23, 2022 | 3 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jun 22, 2022 | 45 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jun 22, 2022 | 28 gal | Grease / FOG | — | Street/Curb and Gutter |
| Jun 21, 2022 | 1 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jun 16, 2022 | 224 gal | Grease / FOG | — | Street/Curb and Gutter |
| May 30, 2022 | 5 gal | Root Intrusion | — | Street/Curb and Gutter |
| May 23, 2022 | 132 gal | Root Intrusion | — | Street/Curb and Gutter |
| May 23, 2022 | 10 gal | Grease / FOG | — | Separate Storm Drain |
| May 19, 2022 | 13 gal | Equipment Failure | — | Street/Curb and Gutter |
| May 17, 2022 | 21 gal | Equipment Failure | — | Street/Curb and Gutter |
| May 16, 2022 | 41 gal | Root Intrusion | — | Street/Curb and Gutter |
| May 11, 2022 | 69 gal | Equipment Failure | — | Unpaved surface |
| May 10, 2022 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| May 2, 2022 | 32K gal | Equipment Failure | — | Separate Storm Drain |
| Apr 27, 2022 | 49 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 19, 2022 | 11 gal | Root Intrusion | — | Street/Curb and Gutter |
| Apr 17, 2022 | 122 gal | Equipment Failure | — | Street/Curb and Gutter |
| Apr 7, 2022 | 42 gal | Equipment Failure | — | Unpaved surface |
| Apr 7, 2022 | 2 gal | Root Intrusion | — | Separate Storm Drain |
| Apr 4, 2022 | 77 gal | Grease / FOG | — | Street/Curb and Gutter |
| Mar 29, 2022 | 75 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 23, 2022 | 18 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 21, 2022 | 2 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 20, 2022 | 4 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 16, 2022 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Mar 14, 2022 | 43 gal | Grease / FOG | — | Separate Storm Drain |
| Mar 8, 2022 | 75 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 27, 2022 | 11 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 24, 2022 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 19, 2022 | 1 gal | Root Intrusion | — | Paved Surface |
| Feb 16, 2022 | 138 gal | Grease / FOG | — | Street/Curb and Gutter |
| Feb 15, 2022 | 8 gal | Grease / FOG | — | Street/Curb and Gutter |
| Feb 15, 2022 | 16 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 15, 2022 | 2 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 14, 2022 | 8 gal | Equipment Failure | — | Street/Curb and Gutter |
| Feb 14, 2022 | 328 gal | Equipment Failure | — | Separate Storm Drain |
| Feb 13, 2022 | 6 gal | Grease / FOG | — | Street/Curb and Gutter |
| Feb 3, 2022 | 27 gal | Root Intrusion | — | Separate Storm Drain |
| Feb 3, 2022 | 13 gal | Root Intrusion | — | Street/Curb and Gutter |
| Feb 2, 2022 | 15 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 27, 2022 | 73 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jan 26, 2022 | 21 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 22, 2022 | 13 gal | Equipment Failure | — | Paved Surface |
| Jan 19, 2022 | 14 gal | Root Intrusion | — | Street/Curb and Gutter |
| Jan 11, 2022 | 57 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 10, 2022 | 7 gal | Equipment Failure | — | Street/Curb and Gutter |
| Jan 9, 2022 | 118 gal | Equipment Failure | — | Unpaved surface |
| Jan 8, 2022 | 35 gal | Equipment Failure | — | Street/Curb and Gutter |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.