# WASHINGTON GAS LIGHT CO — Montgomery County, MD

**Citation:** NPMS FIPS 24031 / OPID 22182  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

28.943932 active Natural Gas pipeline miles in Montgomery County, MD; public NPMS snapshot 2026-07-16.

## Document text

WASHINGTON GAS LIGHT CO (PHMSA OPID 22182) reported 28.943932 active Natural Gas pipeline miles in Montgomery County, MD (county FIPS 24031) 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: `b65ff1e0957171a8c3c4a747fbf2878415b77c7215cf0e6be68ec4fe11cece17`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-25T05:20:53.429Z
- Document slug: `npms-mileage-fabab94523372daf8cbdefff`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "24031",
  "stateFips": "24",
  "state": "MD",
  "county": "Montgomery County",
  "region": "Montgomery County, MD",
  "operator": {
    "id": "22182",
    "name": "WASHINGTON GAS LIGHT CO"
  },
  "commodity": "Natural Gas",
  "mileage": 28.9439318,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 5506,
    "rowSha256": "581df4435063f79f71feb2d1f0cc9d6ebeac5e07c30670a96ed5ef00cd3a4b7b"
  },
  "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": "WASHINGTON GAS LIGHT CO"
}
```