# NSTAR GAS COMPANY — Middlesex County, MA

**Citation:** NPMS FIPS 25017 / OPID 2652  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

0.624633 active Natural Gas pipeline miles in Middlesex County, MA; public NPMS snapshot 2026-07-16.

## Document text

NSTAR GAS COMPANY (PHMSA OPID 2652) reported 0.624633 active Natural Gas pipeline miles in Middlesex County, MA (county FIPS 25017) in the public NPMS summary snapshot dated 2026-07-16. The snapshot includes active assets only and excludes permanently abandoned assets. Exact pipeline locations and restricted NPMS GIS data are not included.

## Provenance

- Official: Yes
- Source: <https://www.npms.phmsa.dot.gov/Documents/NPMS_Active_Pipe_County_Mileage.xlsx>
- Source ID: `npms-public-summaries`
- SHA-256: `2de3622ff5e88b8a64b745adbd046a6f4eee29d950cedbad0011e694801d99e8`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-24T20:23:47.165Z
- Document slug: `npms-mileage-5bd99b3aa256f0d59bdd264e`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "25017",
  "stateFips": "25",
  "state": "MA",
  "county": "Middlesex County",
  "region": "Middlesex County, MA",
  "operator": {
    "id": "2652",
    "name": "NSTAR GAS COMPANY"
  },
  "commodity": "Natural Gas",
  "mileage": 0.6246326,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 5548,
    "rowSha256": "eb36e5505b86236b3ededd6a3e38be552404d500bb1a1ba4a2ab79cfd654b006"
  },
  "citedSections": [
    "191.29"
  ],
  "caveat": "Public aggregate snapshot only. It is not a complete representation of exact pipeline locations, may be updated, and is not an agency finding about facility condition.",
  "jurisdiction": "US",
  "operatorName": "NSTAR GAS COMPANY"
}
```