[Research](/research) / SdHazmatPermitPulse

# San Diego County Hazardous Materials Permits (Tanks, Hazardous Waste): 2026 statistics from 8,143 public records

**The most common primary activity is Hazardous waste generator: 3,573 of 8,143 records (43.9%) (as of 2026-11-03; source: San Diego County Department of Environmental Health and Quality Hazardous Materials Facility Data (San Diego County open data)).**

Data as of 2026-11-03 · Compiled by Zalwin from San Diego County Department of Environmental Health and Quality Hazardous Materials Facility Data (San Diego County open data) Copy citation

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## Key findings

- Zalwin's SdHazmatPermitPulse dataset holds 8,143 SdHazmatPermitPulse records dated 2026-05-01 to 2026-11-01 (as of 2026-11-03; source: San Diego County Department of Environmental Health and Quality Hazardous Materials Facility Data (San Diego County open data)). [#](#finding-1)
- The most common primary activity is Hazardous waste generator: 3,573 of 8,143 records (43.9%) (as of 2026-11-03; source: San Diego County Department of Environmental Health and Quality Hazardous Materials Facility Data (San Diego County open data)). [#](#finding-2)
- 1,933 of 8,143 records (23.7%) are dated within the 30 days before 2026-11-03 (source: San Diego County Department of Environmental Health and Quality Hazardous Materials Facility Data (San Diego County open data)). [#](#finding-3)

## SdHazmatPermitPulse records by primary activity

| Group | Records | Share |
|---|---|---|
| Hazardous waste generator | 3,573 | 43.9% |
| Hazardous materials only | 3,000 | 36.8% |
| Underground storage tanks | 706 | 8.7% |
| Aboveground storage tanks | 518 | 6.4% |
| RCRA large quantity generator | 329 | 4.0% |
| On-site waste treatment | 15 | 0.2% |
| Recycler | 2 | 0.0% |

## Methodology and data provenance

- Sample: 8,143 public records dated 2026-05-01 to 2026-11-01; illustrative samples excluded.

- Source: San Diego County Department of Environmental Health and Quality Hazardous Materials Facility Data (San Diego County open data). Refreshed automatically about every 24 hours; figures above are as of 2026-11-03.

- Shares are of all records in the dataset; totals and medians use only records with a stated amount.

- Organization-level data only. Informational; verify individual records at the official source.

### Cite this study

Zalwin Research, "SdHazmatPermitPulse statistics" (data as of 2026-11-03), https://zalwin.com/research/sdhazmatpermitpulse

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