Lead pipes in Guam
Guam's 5 community water systems reported 0 lead and 0 galvanized-requiring-replacement service lines, plus 43,610 of unknown material.
- Lead 0%
- Galvanized (replace) 0%
- Unknown 95%
- Non-lead 4.8%
0% of the service lines Guam utilities reported are lead or galvanized requiring replacement, well below the national share of 3.1%. 95% are still unidentified (national: 21%).
No confirmed lead, but unknown lines remain (3)
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Gwa Northern Water SystemAdacao | 0 | 0 | 38,633 | 0% |
| Gwa Central Water SystemAdelup | 0 | 0 | 2,658 | 0% |
| Gwa Southern Water SystemTalofofo | 0 | 0 | 2,319 | 0% |
No lead or unknown lines reported (2)
Systems serving 1,000 or more people. Systems without counts on file are listed as 0.
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| U.S. Navy Water SystemApra Heights | 0 | 0 | 0 | 0% |
| Andersen Air Force Base Water SystemGuam County | 0 | 0 | 0 | 0% |
Guam lead pipe questions
How many lead pipes are in Guam?
Guam's community water systems reported 0 lead service lines and 0 galvanized lines that must be replaced, for 0 in total. Another 43,610 lines are of unknown material.
What share of Guam service lines are lead?
0% of reported service lines in Guam are lead or galvanized requiring replacement, well below the national figure of 3.1%. 95% are still unknown, compared with 21% nationally.
How do I find out if my Guam home has a lead service line?
Search for your water system or ZIP code above, then open your utility's address-level inventory map. You can also check the pipe where it enters your home with a scratch and magnet test.
Source: EPA SDWIS service line inventory, 2026 Q3. Smaller systems with no lead or unknown lines are omitted. See also national rankings.