EPA-regulated facilities near San Mateo, CA
There are 6,706 EPA-regulated facilities within 5 miles of San Mateo, California. The most common kinds are hazardous waste (6,097), air emissions (646), water discharge (89). None is in significant noncompliance, but 4 have a violation on record. Penalties over the last five years total $6k across 1 site.
By category
| Category | Facilities |
|---|---|
| Hazardous waste | 6,097 |
| Treatment, storage or disposal | 1 |
| Large quantity generators | 63 |
| Small quantity generators | 421 |
| Transporters | 21 |
| Chemical (RMP/TRI) | 29 |
| Superfund | 1 |
| Air emissions | 646 |
| Synthetic minor sources | 1 |
| Minor sources | 4 |
| Water discharge | 89 |
| Major permits | 5 |
| Minor permits | 56 |
| Drinking water systems | 16 |
| Greenhouse gas reporters | 1 |
| Data centers | 4 |
| Scrap yards | 1 |
| Recycling centers | 4 |
A facility enrolled in several programs counts once in the total and once in each of its categories.
Largest penalties
Penalties assessed over the last five years.
- SAN MATEO WWTF $6k in penalties
Superfund sites
Data centers
- KEYNOTE SYSTEMS C/O ORCHARD CO
- RV VI 777MARINERS LLC
- USPS SAN MATEO INFORMATION TECHNOLOGY AND ACCT SVC
- RNM PROPERTIES
County
Nearby towns
Reading these numbers
These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. Distances are from the center of San Mateo as the Census Bureau records it. The Data page explains where each record comes from and how it can mislead.