Hazardous waste · violations by year
Hazardous waste violations in San Mateo County, California in 2026
- 12Handlers cited
- 35Violations on record
- 10Handlers cited in 2025
- 7thAmong California counties that year
San Mateo County, California has 12 hazardous waste handlers with at least one violation on record during 2026, across 35 separate violations. That compares with 10 in 2025. It is the 7th largest of the 16 California counties with three or more handlers cited that year. Each row below carries the date the violation was recorded, the agency that recorded it and the kind of violation it was.
Other years
Comparable counties in California, 2026
- Kern County 12
- Contra Costa County 11
- San Diego County 11
- Riverside County 16
- Ventura County 7
- Santa Clara County 19
- San Joaquin County 5
- Sacramento County 4
Violations recorded in 2026
| Date | Handler | Where | Kind | Recorded by |
|---|---|---|---|---|
| 2026-08-25 | UCSF / CALIFORNIA CANCER CARE | San Mateo | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-08-25 | UCSF / CALIFORNIA CANCER CARE | San Mateo | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | S |
| 2026-08-25 | UCSF / CALIFORNIA CANCER CARE | San Mateo | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-08-18 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC PORT OF REDWOOD CITY | Redwood City | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | S |
| 2026-07-17 | REDWOOD CITY MEDICAL CENTER MARSHALL MEDICAL OFFICE BUILDING | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-07-17 | REDWOOD CITY MEDICAL CENTER MARSHALL MEDICAL OFFICE BUILDING | Redwood City | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | S |
| 2026-07-17 | REDWOOD CITY MEDICAL CENTER MARSHALL MEDICAL OFFICE BUILDING | Redwood City | Standards Applicable to Generators of HW: General | S |
| 2026-07-17 | REDWOOD CITY MEDICAL CENTER MARSHALL MEDICAL OFFICE BUILDING | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-07-09 | MYRIAD GENETICS WOMEN'S HEALTH | South San Francisco | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-06-24 | AI INDUSTRIES, LLC | Redwood City | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | S |
| 2026-06-24 | AI INDUSTRIES, LLC | Redwood City | Standards Applicable to Generators of HW: General | S |
| 2026-06-24 | AI INDUSTRIES, LLC | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-06-24 | AI INDUSTRIES, LLC | Redwood City | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | S |
| 2026-06-24 | AI INDUSTRIES, LLC | Redwood City | Standards Applicable to Generators of HW: General | S |
| 2026-06-18 | GENENTECH INC SOUTH CAMPUS | South San Francisco | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-06-18 | GENENTECH INC SOUTH CAMPUS | South San Francisco | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-05-07 | STANFORD MEDICINE OUTPATIENT CENTER | Redwood City | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | S |
| 2026-05-07 | STANFORD MEDICINE OUTPATIENT CENTER | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-05-07 | STANFORD MEDICINE OUTPATIENT CENTER | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-04-28 | SIMS METAL - REDWOOD CITY | Redwood | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | S |
| 2026-03-27 | PG&E SAN CARLOS SERVICE CENTER | San Carlos | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-03-06 | MRL SAN FRANCISCO, LLC | South San Francisco | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-03-06 | MRL SAN FRANCISCO, LLC | South San Francisco | Standards Applicable to Generators of HW: Manifest Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-02-27 | CODEXIS INC | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-02-27 | CODEXIS INC | Redwood City | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | S |
| 2026-02-27 | CODEXIS INC | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-02-27 | CODEXIS INC | Redwood City | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | S |
| 2026-02-27 | CODEXIS INC | Redwood City | Standards Applicable to Generators of HW: General | S |
| 2026-01-29 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC PORT OF REDWOOD CITY | Redwood City | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | S |
| 2026-01-29 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC PORT OF REDWOOD CITY | Redwood City | Standards Applicable to Generators of HW: General | S |
| 2026-01-29 | CLEAN HARBORS ENVIRONMENTAL SERVICES INC PORT OF REDWOOD CITY | Redwood City | Standards for Owners and Operators of HW TSDs: Manifest System, Recordkeeping and Reporting | S |
| 2026-01-22 | SEAPORT REFINING LLC | Redwood City | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | S |
| 2026-01-22 | SEAPORT REFINING LLC | Redwood City | Standards Applicable to Generators of HW: General | S |
| 2026-01-22 | SEAPORT REFINING LLC | Redwood City | Standards Applicable to Generators of HW: General | S |
| 2026-01-22 | SEAPORT REFINING LLC | Redwood City | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | S |
Figures from EPA’s RCRAInfo download.