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ZIP Code 59604 Water Quality
Montana · 1,798 people served · 8 water systems
C
FairZIP code 59604 is in Montana and is a rural community from a drinking-water-service perspective, with 1,798 people served by 8 EPA-registered public water systems. It corresponds to HELENA.
Within ZIP code 59604, the EPA Safe Drinking Water Information System (SDWIS) records 3 health-based violations during the past five years across 8 water systems serving this postal area. The grade of C reflects the aggregate compliance pattern, not the current daily water quality.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 59604
Water Systems Serving 59604
BIG STACK ESTATES
PWSID: MT0004682
60 served
SHADE TREE MOBILE PARK
PWSID: MT0004685
100 served
RIVERS EDGE MOBILE HOME PARK GRT FLS
PWSID: MT0004687
75 served
BEACON TRAILER COURT HELENA
PWSID: MT0000596
55 served
TEN MILE AND PLEASANT VALLEY WUA
PWSID: MT0002005
750 served
WESTERN SKIES MOBILE CT
PWSID: MT0000519
25 served
TREASURE STATE ACRES WUA
PWSID: MT0002390
483 served
RANCHVIEW ESTATES WUA
PWSID: MT0003782
250 served
About ZIP-code water data
Postal-code level water quality data is built up from the underlying water systems — multiple ZIPs may share a single utility, and a single ZIP can span multiple utilities. For property-level information, contact the specific utility serving your address. EPA data on this page was last refreshed on 2026-05-18.
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