| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1150571 |
01/03/2026 |
SSOS |
Type: Category 1 Spill; Natural Disaster (specify below),Other (specify below) caused 42992 gallons of sewage to spill from Other Sewer System Structure,Manhole at 2 Corte Del Coronado, Larkspur to Drainage Conveyance System that discharges to surface water,Paved Surface,Unpaved Surface,Surface Water |
Other (specify below),Plan Rehabilitation or Replacement of Sewer. Ensure open lines of communication with the City of Larkspur public works department and Neighborhood HOA on levee projects as well as predicted king tides, storm surge how and when they begin to manage the level of the lagoon that flooded the neighborhood will greatly improve the effectiveness to move stormwater out of the neighborhood. The District was never aware of the levee project or infrastructure to drain the lagoon until the District contacted the city of Larkspur to perform de watering of the lagoon as the water level never went down even at low tide and remained trapped keeping the neighborhood flooded due to levee project, valve positions and fish screens blocking the out flow of the lagoon and neighborhood. |
Violation |
A |
SSO |
| 1150458 |
01/03/2026 |
SSOS |
Type: Category 1 Spill; Other (specify below),Natural Disaster (specify below) caused 42992 gallons of sewage to spill from Manhole,Other Sewer System Structure at 2 Corte Del Coronado, Larkspur to Surface Water,Unpaved Surface,Paved Surface,Drainage Conveyance System that discharges to surface water |
Other (specify below),Plan Rehabilitation or Replacement of Sewer. Ensure open lines of communication with the City of Larkspur public works department and Neighborhood HOA on levee projects as well as predicted king tides, storm surge how and when they begin to manage the level of the lagoon that flooded the neighborhood will greatly improve the effectiveness to move stormwater out of the neighborhood. The District was never aware of the levee project or infrastructure to drain the lagoon until the District contacted the city of Larkspur to perform de watering of the lagoon as the water level never went down even at low tide and remained trapped keeping the neighborhood flooded due to levee project, valve positions and fish screens blocking the out flow of the lagoon and neighborhood. |
Violation |
A |
SSO |
| 1150379 |
01/02/2026 |
SSOS |
Type: Category 1 Spill; Natural Disaster (specify below) caused 6600 gallons of sewage to spill from Other Sewer System Structure at 2 Corte Del Coronado, Larkspur to Paved Surface,Drainage Conveyance System that discharges to surface water,Surface Water,Unpaved Surface,Street/Curb and Gutter (2 3) |
Other (specify below). This spill was a direct result of historic high King Tides in conjunction with many days of heavy rain. The system is simply not designed to handle such an act of nature. |
Violation |
A |
SSO |
| 1151303 |
01/02/2026 |
SSOS |
Type: Category 1 Spill; Natural Disaster (specify below) caused 6600 gallons of sewage to spill from Other Sewer System Structure at 2 Corte Del Coronado, Larkspur to Unpaved Surface,Street/Curb and Gutter (2 3),Paved Surface,Drainage Conveyance System that discharges to surface water,Surface Water |
Other (specify below). Ensure open lines of communication with the City of Larkspur public works department and Neighborhood HOA on levee projects as well as predicted king tides, storm surge how and when they begin to manage the level of the lagoon that flooded the neighborhood will greatly improve the effectiveness to move stormwater out of the neighborhood. The District was never aware of the levee project or infrastructure to drain the lagoon until the District contacted the city of Larkspur to perform de watering of the lagoon as the water level never went down even at low tide and remained trapped keeping the neighborhood flooded due to levee project, valve positions and fish screens blocking the out flow of the lagoon and neighborhood. |
Violation |
A |
SSO |
| 1150353 |
01/01/2026 |
SSOS |
Type: Category 1 Spill; Natural Disaster (specify below) caused 2283 gallons of sewage to spill from Other Sewer System Structure at 2 Corte Del Coronado, Larkspur CA to Drainage Conveyance System that discharges to surface water,Surface Water,Unpaved Surface,Paved Surface,Street/Curb and Gutter (2 3) |
Other (specify below). This spill was a direct result of historic high King Tides in conjunction with many days of heavy rain. The system is simply not designed to handle such an act of nature. |
Violation |
A |
SSO |
| 1151301 |
01/01/2026 |
SSOS |
Type: Category 1 Spill; Natural Disaster (specify below) caused 2283 gallons of sewage to spill from Other Sewer System Structure at 2 Corte Del Coronado, Larkspur CA to Paved Surface,Drainage Conveyance System that discharges to surface water,Street/Curb and Gutter (2 3),Unpaved Surface,Surface Water |
Other (specify below). Ensure open lines of communication with the City of Larkspur public works department and Neighborhood HOA on levee projects as well as predicted king tides, storm surge how and when they begin to manage the level of the lagoon that flooded the neighborhood will greatly improve the effectiveness to move stormwater out of the neighborhood. The District was never aware of the levee project or infrastructure to drain the lagoon until the District contacted the city of Larkspur to perform de watering of the lagoon as the water level never went down even at low tide and remained trapped keeping the neighborhood flooded due to levee project, valve positions and fish screens blocking the out flow of the lagoon and neighborhood. |
Violation |
A |
SSO |
| 1148742 |
10/17/2025 |
SSOS |
Type: Category 1 Spill; Debris-General caused 10 gallons of sewage to spill from Manhole at 6 Morningside dr. San Anselmo to Street/Curb and Gutter (2 3),Surface Water |
Post Spill CCTV,Other (specify below). CCTV inspection on 10/20/25 did not reveal any debris or defective pipe segments. The following day 10/21/2025 the line was hydro flushed and moderate debris was observed from the syphon. The line/syphon is scheduled for 6 month flushing intervals. |
Violation |
A |
SSO |
| 1148747 |
10/13/2025 |
SSOS |
Type: Category 1 Spill; Pipe Structural Problem/Failure - Controls,Root Intrusion,Fats, Oil and Grease (FOG) caused 8220 gallons of sewage to spill from Manhole at 965 Magnolia Ave, Larkspur to Surface Water |
Post Spill CCTV,Other (specify below),Inspected Sewer Using CCTV to Determine Cause,Repaired Facilities or Replaced Defect. A post spill CCTV inspection revealed a large root mass still present at an offset joint in the 6" clay pipe main. Additionally, a section of the sewer main was replaced with a cast iron section, and the cast iron section has dropped out and is missing pieces on top. Staff hydro jetted the line and removed the root mass. In house repair crew has scheduled a repair for both the offset joint with the root mass and the cast iron section of pipe. Engineering is also reviewing this section of pipe along with upstream sections to determine if full replacement and upsizing make sense. |
Violation |
A |
SSO |
| 1145936 |
08/03/2025 |
SSOS |
Type: Category 1 Spill; Collection System Maintenance Failure (specify below) caused 197 gallons of sewage to spill from Manhole at 14 Terrace Ave, Greenbrae, CA to Drainage Conveyance System that discharges to surface water |
Other (specify below),Adjusted Schedule/Method of Preventive Maintenance,Inspected Sewer Using CCTV to Determine Cause. Corrective action includes an additional box added to the work order, to ensure all tools/equipment have been removed from the MH. Currently the District asset management team is working to incorporate the new information box into the workorders. The expected implementation for this is the end of August 2025. |
Violation |
A |
SSO |
| 1141693 |
02/06/2025 |
SSOS |
Type: Category 1 Spill; Damage by Others Not Related to Collection System Construction/Maintenance,Other (specify below) caused 115454 gallons of sewage to spill from Other (specify below) at 115 Bon Air Center, Larkspur to Paved Surface,Surface Water,Unpaved Surface |
Post Spill CCTV,Inspected Sewer Using CCTV to Determine Cause,Plan Rehabilitation or Replacement of Sewer,Other (specify below). This is a secondary force main and has been isolated from service.
Corrective action already completed includes excavation of the break in the force main, and assessment of the immediate damage.
Planned corrective actions include:
Additional CCTV inspection of the of pipe.
Evaluation of pipe structural integrity past the extents of the corrosion.
Plans with Engineering to expedite a short-term repair and long-term replacement of the pipe through CIP depending on the integrity of the remaining secondary force main. |
Violation |
B |
SSO |
| 1140290 |
02/06/2025 |
SSOS |
Type: Category 1 Spill; Other (specify below),Damage by Others Not Related to Collection System Construction/Maintenance caused 113289 gallons of sewage to spill from Other (specify below) at 115 Bon Air Center, Larkspur to Surface Water,Paved Surface,Unpaved Surface |
Inspected Sewer Using CCTV to Determine Cause,Other (specify below),Post Spill CCTV,Plan Rehabilitation or Replacement of Sewer. This is a secondary force main and has been isolated from service.
Corrective action already completed includes excavation of the break in the force main, and assessment of the immediate damage.
Planned corrective actions include:
Additional CCTV inspection of the of pipe.
Evaluation of pipe structural integrity past the extents of the corrosion.
Plans with Engineering to expedite a short-term repair and long-term replacement of the pipe through CIP depending on the integrity of the remaining secondary force main. |
Violation |
B |
SSO |
| 1138305 |
12/17/2024 |
SSOS |
Type: Category 1 Spill; Root Intrusion,Debris-General,Fats, Oil and Grease (FOG) caused 1020 gallons of sewage to spill from Manhole at 97 Frances Ave, Larkspur to Surface Water,Drainage Conveyance System that discharges to surface water,Paved Surface,Street/Curb and Gutter (2 3),Drainage Conveyance System |
Post Spill CCTV. Staff will review the cleaning schedule of the line. CCTV work was performed the same day to accurately identify the cause of the blockage. roots had entered the system possible lateral cleaning by plumber and lodged on a pipe joint capturing debris rock sand and general debris leading to a blockage |
Violation |
B |
SSO |
| 1133230 |
06/14/2024 |
SSOS |
Type: Category 1 Spill; Pipe Structural Problem/Failure - Controls caused 44 gallons of sewage to spill from Gravity Mainline at 137 Poplar Dr., Kentfield to Drainage Conveyance System that discharges to surface water |
Plan Rehabilitation or Replacement of Sewer, Repaired Facilities or Replaced Defect. The spill was caused by a crack in the VCP main. The defect was fixed with a cured in place fiberglass patch. This portion of the main happens to be in the flow of the stormwater conveyance system. Operations staff is recommending the engineering department look at moving main out of the stormwater flow or upgrading piper material. |
Violation |
B |
SSO |
| 1133226 |
01/10/2024 |
SSOS |
Type: Category 1 Spill; Debris from Lateral, Debris-wipes/Non-disposables, Other (specify below) caused 1701 gallons of sewage to spill from Backflow Prevention Device, Inside Building or Structure, Lateral Clean Out (Private), Manhole at 387 Madrone Ave, Larkspur, CA to Building or Structure, Drainage Conveyance System that discharges to surface water, Surface Water, Unpaved Surface |
Adjusted Schedule/Method of Preventive Maintenance, Inspected Sewer Using CCTV to Determine Cause, Repaired Facilities or Replaced Defect. The District has scheduled maintenance repairs in the up stream manhole to improve the flow channel. The District has also schedule informational outreach flyers to be hung with regards to "wipes cause clogs" to the homeowners upstream of the spill location. |
Violation |
B |
SSO |
| 1133225 |
11/26/2023 |
SSOS |
Type: Category 1 Spill; Root Intrusion caused 442 gallons of sewage to spill from Manhole at Edna Ct x Wolf Grade, Greenbrae, CA to Drainage Conveyance System that discharges to surface water |
Inspected Sewer Using CCTV to Determine Cause, Plan Rehabilitation or Replacement of Sewer. After CCTV inspection, the District has planned to add the replacement of this 95' of VCP with HDP pipe in our 2024 upcoming capital budget year. |
Violation |
B |
SSO |
| 1133224 |
09/12/2023 |
SSOS |
Type: Category 1 Spill; Pipe Structural Problem/Failure - Installation caused 1285 gallons of sewage to spill from Other (specify below) at 27 Fern Rd, Kentfield CA to Drainage Conveyance System that discharges to surface water |
Repaired Facilities or Replaced Defect. Upon discovery of spill, staff CCTV sewer main, identified broken pipe joint allowing the leak. Staff installed a cured in place pipe patch, which sealed the sewer main, not allowing any flow to exit the system. |
Violation |
B |
SSO |
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Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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