Plumbing businesses in District of Columbia.
District of Columbia holds 42 tracked plumbing businesses, 0.1% of the national total, ranking #51 of 51 with 2.42 per 1,000 employer firms in the state.
42
Tracked businesses
#51
National rank
2.42
Per 1,000 businesses
Washington
Top city
Where they concentrate
| City | Tracked businesses | Share of state |
|---|---|---|
| Washington | 23 | 54.8% |
Methodology. Web-present plumbing businesses tracked nationally (deduplicated). An activity-verification pass is in progress; counts are tracked entities, not verified-active counts, and will tighten as verification completes.
Total employer firms (all sectors) per state, US Census Bureau Business Dynamics Statistics, 2023. Density is vertical entities per 1,000 employer firms. District of Columbia: 17,380 employer firms. Last updated 2026-06-11. Cite freely with a link.
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