Backflow testing in Virginia
2 utility lists · 116 companies. Largest list: City of Norfolk Department of Utilities, Office of Cross Connections (104 companies). Your utility decides which testers it accepts, so start from the utility that sent your notice.
Utility lists in Virginia, ranked by companies on the list
| Rank in state | Utility list | Area | Companies | Testers | vs national median | National rank (by companies) |
|---|---|---|---|---|---|---|
| 1 | City of Norfolk Department of Utilities, Office of Cross Connections | Norfolk | 104 | Company-level list | 1.8× | 7 of 33 |
| 2 | Town of Appomattox | Appomattox | 13 | Company-level list | 0.2× | 31 of 33 |
Computed from the 2 Virginia utility lists above, as fetched 2026-11-04 (UTC). National median: 57 companies per list across the 33 utility lists we hold (n=33). National rank 1 = the list naming the most companies; equal counts share a rank. Testers: only lists that name each company's testers carry a count. Not in the company counts: 1 entry for an individual tester with no company named and 7 entries for companies named after a person; we count those but do not republish them.
How current each list is
| Utility list | Version as printed | Date and age | Fetched (UTC) | We re-check it every |
|---|---|---|---|---|
| City of Norfolk Department of Utilities, Office of Cross Connections | “2026 (PDF modified 5 Feb 2026)” | 2026-02-05 (PDF file modified date; the list prints no full date), 272 days before we fetched it; 15 of 22 by recency | 2026-11-04 | 365 days |
| Town of Appomattox | “Updated October 2024” | The list prints no full date; see the version as printed | 2026-11-04 | 365 days |
Computed from the 2 Virginia utility lists above, as fetched 2026-11-04 (UTC). Median age at fetch across the 22 lists we hold that carry a date: 206 days (n=22); rank 1 = the most recently dated list. A month-only or two-digit version (for example “7.2026”) is shown as printed and not turned into a date.
Where the listed companies are based
104 companies on Virginia lists print a town (104 of 116), spread over 19 towns. The most common:
- Virginia Beach: 33 companies
- Chesapeake: 25 companies
- Norfolk: 23 companies
- Portsmouth: 3 companies
- Suffolk: 3 companies
- Fredericksburg: 2 companies
- City of Norfolk Department of Utilities, Office of Cross Connections: 23 of 104 companies with a printed town (22%) are in Norfolk, the utility’s home city.
Based outside Virginia: 1 company in North Carolina.
Computed from the 2 Virginia utility lists above, as fetched 2026-11-04 (UTC). Towns as each list prints them; a company named on two lists counts once.
Companies on more than one list
1 company of the 116 on Virginia lists is named on more than one of them:
- Town of Appomattox and City of Norfolk Department of Utilities, Office of Cross Connections: 1 company on both (8% of the first list, 1% of the second).
Also on a utility list in another state: 1 company (North Carolina).
Computed from the 2 Virginia utility lists above, as fetched 2026-11-04 (UTC). Matched by our company record (same name plus a shared ZIP code or phone number on the lists).
What kind of businesses are on the lists
The biggest difference from all the lists we hold: “plumbing” appears in 40% of company names on Virginia lists, against 25% across all of them.
| Company name contains | Companies (116) | Share | Share, all 2,590 companies we hold |
|---|---|---|---|
| Plumbing | 46 | 40% | 25% |
| Backflow or cross-connection | 8 | 7% | 24% |
| Fire | 11 | 9% | 17% |
| Irrigation, lawn, landscape or sprinkler | 13 | 11% | 10% |
| Mechanical, heating or air | 22 | 19% | 6% |
Computed from the 2 Virginia utility lists above, as fetched 2026-11-04 (UTC). A company named on two lists counts once. A name can match more than one row; 27 names here match none. The words say nothing about the quality of the work.
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