State guide
Montana
Montana’s public drinking water program is the Department of Environmental Quality Public Water Supply Bureau, and DEQ’s lead-and-copper page is unusually detailed about inventory and replacement deadlines. Utility ownership rules vary sharply by city: Missoula places the whole service line on the owner, Great Falls places responsibility from the main to the meter on the consumer, and Billings classifies service lines as customer-owned but runs a city repair program for qualifying lines.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
Try a ZIP like 30303, “Travis County” or “Columbus, OH”
- Who usually owns the water service line
- Montana does not appear to have one statewide homeowner-versus-utility ownership rule; official local pages show Missoula making the owner responsible from the main to the house, Great Falls from the main to the meter/building, and Billings treating service lines as customer-owned.
- State drinking water program
- Montana Department of Environmental Quality, Public Water Supply Bureau
- Permits for repair or replacement
- DEQ pages found here cover approval for constructing, altering, or extending public water supplies, while local pages show permit/inspection requirements for private service-line work; for example, Missoula says a plumber will obtain a permit before starting water service line work and inspections are required before backfill.
- Assistance programs
- Montana DEQ says it can provide reimbursement up to $14,500 for lead service line activities; Missoula offers utility-assistance loans with repayment on the monthly bill and states eligible loan forgiveness amounts for replacement work, while Billings and Great Falls publish city-side repair/replacement policies or programs.
Official resources in Montana
Missoula Water Service Line Replacement
Official utility page explaining Missoula’s approach to replacing private service lines from the main to the home.
Missoula Utility Assistance Programs
Official city assistance page with loans and potential forgiveness for water service line replacement work.
Key facts for Montana
- Montana DEQ says community and non-transient non-community systems must meet core Lead and Copper Rule Improvements requirements by November 1, 2027.
- Montana DEQ says it can provide technical assistance and reimbursement up to $14,500 for lead service line activities.
- Missoula says the property owner owns the water service line and has exclusive responsibility for maintaining the service line and home plumbing; Missoula Water owns the meter.
- Missoula’s utility-locates page says the city does not own, maintain, locate, or install private sewer or water lines.
- Great Falls says the full water service line from the water main in the street to the meter in the building is owned and maintained by the consumer.
- Billings administrative rules say water service lines are owned by the owner of the property served, and the city repair program may cover qualifying customer-owned lines, including curb valves and curb boxes.
Utility water service line rules in Montana
| Utility | city | phone | Details |
|---|---|---|---|
| Missoula Water Customer Service Missoula | Missoula | 406-552-6700 | Customer service and emergency line; utility pages explain meter checks, lead-line inspections, and ownership responsibilities. |
| Missoula Water Meter Service Department Missoula | Missoula | 406-552-6752 | Official meter-installation/replacement contact shown on the city’s water meter page. |
| City of Missoula Building Missoula | Missoula | 406.552.6630 | Questions on inspection procedures for water service line installation, repair, and replacement. |
| Billings Public Works Utilities Service Center Yellowstone | Billings | (406) 657-8315 | Utility service center for starting/stopping service, billing questions, leak reports, and water shutoff coordination during repairs. |
* Not published: the official page doesn't list it. Call the office to confirm before you rely on it.
What to do next
- Check DEQ’s Lead & Copper Rule page first, then confirm your city’s ownership rule because Montana utilities do not use one uniform split.
- In Missoula, line replacement or repair work should be coordinated with both a plumber and an excavator because the city’s inspection policy splits who does what.
- If you are in Great Falls or Billings, ask the city whether your service line qualifies for a city repair or replacement program before authorizing private work.
Not seeing your utility or county?
We list a utility only when an official government page publishes its rules. If yours isn't in the table above, it may not publish them online yet. Here's what to use instead, in order:
- General Start with the statewide information above. It applies across Montana, but cities and counties can add their own steps, fees or deadlines.
- Closest verified Nearest places where we have verified local data outside this state (distance from Montana's population center, for comparison only):
- City of Idaho Falls Water Division, Idaho · about 231 miles
- City of Sheridan Utility Maintenance, Wyoming · about 253 miles
- City of Sheridan Utility Services, Wyoming · about 253 miles
- Call to confirm Ask the official office. They have the current local rule, fee and form.Missoula Water Service Line Replacement
Website →Phone: (406) 552-6000 (as listed on that page, checked Oct 4, 2026)Your city or county office: Local governments →Not sure who handles it locally? USAGov's free help line, 1-844-872-4681, or the Montana page on USA.gov can point you to the right office. - Know the current info? Tell us and include a link to the official page. We check every tip before it goes up.
Helpful guides
- Who is responsible for the water line to your house?
- The curb stop, meter and property line, explained
- Water line leak in your yard: what to do
- Water service line replacement costs
Water line responsibility check →
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