| Violation ID |
Occurrence Date |
Violation Type |
Violation Description(+) |
Violation Status |
Priority |
Source |
Facility Name |
Violated Reg. Meas. ID |
Violated Reg. Meas. Order No. |
Linked to Enf. |
| 1149813 |
08/13/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Fats, Oil and Grease (FOG) caused 165 gallons of sewage |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1140508 |
02/13/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Flow Exceeded Capacity (Separate Collection System Only) |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1141079 |
02/15/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Other (specify below) caused 684000 gallons of sewage to |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1149811 |
12/02/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Other (specify below),Flow Exceeded Capacity (Separate C |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1138282 |
12/14/2024 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Other (specify below) caused 5400 gallons of sewage to s |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1142177 |
02/15/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Other (specify below) caused 613500 gallons of sewage to |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1139833 |
01/30/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Other (specify below),Damage by Others Not Related to Co |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1149809 |
11/25/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Debris-Rags,Collection System Maintenance Failure (speci |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1149812 |
08/27/2025 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Root Intrusion caused 3750 gallons of sewage to spill fr |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1138589 |
12/31/2024 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Fats, Oil and Grease (FOG) caused 3200 gallons of sewage |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
| 1138285 |
12/14/2024 |
Sanitary Sewer Overflow/Spill/ |
Type: Category 1 Spill; Other (specify below) caused 19500 gallons of sewage to |
Violation |
None |
SSO |
San Mateo CIty CS |
300189 |
2022-0103-DWQ |
N |
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