# National Grid Substation: mineral oil spill (500 gallons) in Middleville, NY

**Score:** 65/100

| Field | Value |
|---|---|
| Site | National Grid Substation |
| Spill number | 2601131 |
| Location | 5125 Ny 28 North Side, Middleville, Herkimer County |
| Material | mineral oil |
| Quantity | 500 gallons |
| Source | New York State DEC Spill Incidents database (data.ny.gov) |
| Cause | Deliberate |
| Spill date | 2026-04-27 |
| Reported | 2026-05-07 |
| Status | Open |

## Why this score
- Still open with DEC: cleanup and closure work pending.
- Petroleum spill.
- 500 gallons reported.

Source: New York State DEC Spill Incidents database (data.ny.gov) (https://data.ny.gov/d/u44d-k5fk). Last refreshed: 2026-11-04T06:06:26.485Z.
From the NYS DEC Spill Incidents database. A report records what was called in; quantities are as reported and may be estimates. Residences, roads and unnamed locations are excluded. Verify status with DEC.