Backflow testing in North Carolina
4 utility lists · 174 companies · 101 testers on the 2 lists that count testers. Largest list: Cape Fear Public Utility Authority (81 companies). Your utility decides which testers it accepts, so start from the utility that sent your notice.
Utility lists in North Carolina, ranked by companies on the list
| Rank in state | Utility list | Area | Companies | Testers | vs national median | National rank (by companies) |
|---|---|---|---|---|---|---|
| 1 | Cape Fear Public Utility Authority | Wilmington | 81 | Company-level list | 1.4× | 14 of 33 |
| 2 | Two Rivers Utilities (City of Gastonia / Gaston County) | Gastonia | 41 | 58 | 0.7× | 22 of 33 |
| 3 | Greenville Utilities Commission (GUC) | Greenville | 34 | 43 | 0.6× | 24 of 33 |
| 4 | Town of Boone Public Utilities and Engineering | Boone | 21 | Company-level list | 0.4× | 29 of 33 |
Computed from the 4 North Carolina 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: 10 entries for an individual tester with no company named and 11 entries for companies named after a person; we count those but do not republish them.
How many testers each company has
| Utility list | Testers with a company | Companies | Testers per company | One-tester companies | Largest company (testers) | National rank (testers per company) |
|---|---|---|---|---|---|---|
| Two Rivers Utilities (City of Gastonia / Gaston County) | 57 | 41 | 1.4 | 35 (85%) | 7 | 5 of 13 |
| Greenville Utilities Commission (GUC) | 34 | 34 | 1 | 34 (100%) | 1 | 12 of 13 |
Computed from the 2 North Carolina utility lists above, as fetched 2026-11-04 (UTC). Median across the 13 tester-level lists we hold: 1.3 testers per company (n=13); rank 1 = most testers per company. Counts only: we never publish testers’ names.
How current each list is
| Utility list | Version as printed | Date and age | Fetched (UTC) | We re-check it every |
|---|---|---|---|---|
| Cape Fear Public Utility Authority | “Revision 66 (8/13/26)” | 2026-08-13 (dated on the list), 83 days before we fetched it; 7 of 22 by recency | 2026-11-04 | 90 days |
| Greenville Utilities Commission (GUC) | “Effective 03/31/2026” | 2026-03-31 (dated on the list), 218 days before we fetched it; 12 of 22 by recency | 2026-11-04 | 365 days |
| Town of Boone Public Utilities and Engineering | “JULY 14TH, 2025” | 2025-07-14 (dated on the list), 478 days before we fetched it; 17 of 22 by recency · Old list | 2026-11-04 | 365 days |
| Two Rivers Utilities (City of Gastonia / Gaston County) | “2025” | The list prints no full date; see the version as printed | 2026-11-04 | 365 days |
Computed from the 4 North Carolina 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
25 companies on North Carolina lists print a town (25 of 174), spread over 15 towns. The most common:
- Boone: 6 companies
- Greenville: 3 companies
- Hickory: 3 companies
- Greensboro: 2 companies
- Charlotte: 1 company
- Hamptonville: 1 company
- Town of Boone Public Utilities and Engineering: 6 of 21 companies with a printed town (29%) are in Boone, the utility’s home city.
Computed from the 4 North Carolina 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
3 companies of the 174 on North Carolina lists are named on more than one of them:
- Town of Boone Public Utilities and Engineering and Cape Fear Public Utility Authority: 1 company on both (5% of the first list, 1% of the second).
- Greenville Utilities Commission (GUC) and Cape Fear Public Utility Authority: 2 companies on both (6% of the first list, 2% of the second).
Also on a utility list in another state: 1 company (Florida), 1 company (Virginia).
Computed from the 4 North Carolina 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 the lists print beyond names
- Greenville Utilities Commission (GUC) prints service types: Fire sprinkler 6 (of 34 companies); a tester certificate expiry date for 34 of 34 companies.
We do not republish expiry dates; open the utility’s own list to check them.
Computed from the 4 North Carolina utility lists above, as fetched 2026-11-04 (UTC).
What kind of businesses are on the lists
The biggest difference from all the lists we hold: “irrigation, lawn, landscape or sprinkler” appears in 14% of company names on North Carolina lists, against 10% across all of them.
| Company name contains | Companies (174) | Share | Share, all 2,590 companies we hold |
|---|---|---|---|
| Plumbing | 40 | 23% | 25% |
| Backflow or cross-connection | 45 | 26% | 24% |
| Fire | 28 | 16% | 17% |
| Irrigation, lawn, landscape or sprinkler | 24 | 14% | 10% |
| Mechanical, heating or air | 8 | 5% | 6% |
Computed from the 4 North Carolina 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; 36 names here match none. The words say nothing about the quality of the work.
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