Montana · population 60,013
Lead pipes in Great Falls, MT
738 lead or galvanized lines to replace
Most of Great Falls (population 60,013) gets its water from City of Great Falls. That system reported 156 lead and 582 galvanized-requiring-replacement service lines out of 22,210, with 5,383 more of unknown material.
3.3% of City of Great Falls'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 0.7%
- Galvanized (replace) 2.6%
- Unknown 24%
- Non-lead 72%
Latest lead test for City of Great Falls (Jan 2026–Jun 2026): 12 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for City of Great Falls.
Water systems serving Great Falls
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| City of Great FallsMain system | 156 | 582 | 5,383 | 3.3% |
| Pleasant Park Community INCAlso serves parts of the city | 0 | 28 | 16 | 56% |
| Malmstrom Air Force BaseAlso serves parts of the city | 0 | 0 | 0 | 0% |
| Sun Prairie Village CountyAlso serves parts of the city | 0 | 0 | 0 | 0% |
| Prairie Water CompanyAlso serves parts of the city | 0 | 0 | 0 | 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 Great Falls
The counts above cover the whole water system. To see whether your line is lead, look up your address on City of Great Falls'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
- East Helena13 lead + galv. lines
- Helena214 unknown
- Shelby7 lead + galv. lines
- Townsend8 lead + galv. lines
- Deer Lodge10 lead + galv. lines
- Havre140 lead + galv. lines
- Belgrade25 lead + galv. lines
- Bozeman3 lead + galv. lines
Check another water system
Questions
Does Great Falls, MT have lead pipes?
Yes. City of Great Falls, which serves Great Falls, reported 156 lead and 582 galvanized-requiring-replacement service lines, plus 5,383 of unknown material.
Who supplies water to Great Falls?
EPA's service area maps place most of Great Falls in City of Great Falls's service area (PWSID MT0000525). Pleasant Park Community INC, Malmstrom Air Force Base, Sun Prairie Village County, Prairie Water Company also serve parts of the city or nearby areas.
How do I check whether my Great Falls home has a lead service line?
Search your address on City of Great Falls'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 Great Falls 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 Great Falls whether your street is scheduled and whether it covers the private side.