Drinking Water Compliance OS

U.S. water systems

Montana Water Systems

Montana

1,255 community water systems on record — 798 active, 457 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Montana’s official records. Always confirm current status with Montana before making decisions based on this information.

Counties in Montana

All community water systems in Montana