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California · California (CIWQS)
Moulton Niguel Water District
F
Usually reaches water
Reported events
32
Total volume
691K gal
Reached waterways
25 (78%)
Reporting since
2007
What caused the overflows
Equipment Failure
13
Other / Unknown
9
Root Intrusion
8
Grease / FOG
1
Capacity Issue
1
Reported overflow events (showing 32 of 32)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Dec 18, 2025 | 750 gal | Root Intrusion | Yes | Drainage Channel leading to Oso Creek |
| Jan 10, 2025 | 590K gal | Other / Unknown | Yes | Sulphur Creek, Aliso Creek, Pacific Ocean |
| Dec 1, 2024 | 19K gal | Other / Unknown | Yes | Salt Creek, Pacific Ocean |
| Dec 31, 2023 | 90 gal | Other / Unknown | — | — |
| Dec 15, 2023 | 625 gal | Equipment Failure | — | — |
| Feb 2, 2023 | 470 gal | Equipment Failure | Yes | Surface Water |
| Nov 20, 2021 | 150 gal | Root Intrusion | — | Unpaved surface |
| Sep 27, 2021 | 210 gal | Root Intrusion | — | Unpaved surface |
| Oct 28, 2020 | 705 gal | Equipment Failure | Yes | Separate Storm Drain |
| May 17, 2018 | 13 gal | Other / Unknown | Yes | Separate Storm Drain |
| Jan 25, 2017 | 750 gal | Equipment Failure | Yes | Beach;Separate Storm Drain |
| Mar 23, 2016 | 14K gal | Equipment Failure | Yes | Drainage Channel |
| Jun 14, 2015 | 5K gal | Equipment Failure | Yes | Surface Water |
| Feb 6, 2015 | 3K gal | Other / Unknown | Yes | Surface Water |
| Nov 23, 2014 | 2K gal | Equipment Failure | — | Other (specify below) |
| Nov 11, 2014 | 5K gal | Root Intrusion | Yes | Drainage Channel;Street/Curb and Gutter |
| Apr 28, 2014 | 9K gal | Other / Unknown | Yes | Beach;Street/Curb and Gutter;Surface Water |
| Feb 12, 2014 | 2K gal | Other / Unknown | Yes | Beach |
| Dec 24, 2013 | 810 gal | Equipment Failure | Yes | Surface Water |
| May 23, 2013 | 25 gal | Equipment Failure | — | Street/curb and gutter |
| May 18, 2013 | 300 gal | Other / Unknown | — | Building or structure |
| Apr 26, 2012 | 800 gal | Root Intrusion | Yes | Surface water |
| Jun 17, 2011 | 350 gal | Grease / FOG | Yes | Surface water |
| Jan 8, 2011 | 7K gal | Equipment Failure | Yes | Beach |
| Sep 19, 2010 | 2K gal | Capacity Issue | Yes | Surface water |
| Nov 14, 2009 | 150 gal | Equipment Failure | Yes | Surface water |
| May 22, 2009 | 2K gal | Equipment Failure | Yes | Surface water |
| Mar 23, 2009 | 750 gal | Equipment Failure | Yes | Beach |
| Feb 15, 2009 | 25K gal | Root Intrusion | Yes | Beach |
| Dec 20, 2008 | 450 gal | Root Intrusion | Yes | Beach;Storm drain;Other (specify below) |
| Nov 21, 2007 | 400 gal | Other / Unknown | Yes | Surface water |
| Oct 30, 2007 | 750 gal | Root Intrusion | Yes | Surface water |
Source: California (CIWQS). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.