Montana · population 5,383
Lead pipes in Hamilton, MT
69 lead or galvanized lines to replace
Most of Hamilton (population 5,383) gets its water from City of Hamilton. That system reported 2 lead and 67 galvanized-requiring-replacement service lines out of 2,532, with 2,444 more of unknown material.
2.7% of City of Hamilton's service lines are lead or galvanized requiring replacement, higher than the Montana average (1.1%) and about the same as the national average (3.1%).
- Lead <0.1%
- Galvanized (replace) 2.6%
- Unknown 97%
- Non-lead 0.8%
Latest lead test for City of Hamilton (Jan 2024–Dec 2026): 2 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists 1 Lead and Copper Rule violation since 2015 for City of Hamilton.
Water systems serving Hamilton
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| City of HamiltonMain system | 2 | 67 | 2,444 | 2.7% |
| Wild Flower HOA theAlso serves parts of the city | 0 | 0 | 47 | 0% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in Hamilton
The counts above cover the whole water system. To see whether your line is lead, look up your address on City of Hamilton's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Missoulano lead reported
- Deer Lodge10 lead + galv. lines
- Butte-Silver Bow556 lead + galv. lines
- Ronan463 unknown
- Dillon4 lead + galv. lines
- Helena214 unknown
- Thompson Falls8 lead + galv. lines
- East Helena13 lead + galv. lines
Check another water system
Questions
Does Hamilton, MT have lead pipes?
Yes. City of Hamilton, which serves Hamilton, reported 2 lead and 67 galvanized-requiring-replacement service lines, plus 2,444 of unknown material.
Who supplies water to Hamilton?
EPA's service area maps place most of Hamilton in City of Hamilton's service area (PWSID MT0000234). Wild Flower HOA the also serves parts of the city or nearby areas.
How do I check whether my Hamilton home has a lead service line?
Search your address on City of Hamilton's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in Hamilton be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask City of Hamilton whether your street is scheduled and whether it covers the private side.