Apr 15, 2026 · 7 min read
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Montana · 12,115 people served · 51 water systems
ZIP code 59901 is in Montana and is a small city from a drinking-water-service perspective, with 12,115 people served by 51 EPA-registered public water systems. It corresponds to KALISPELL.
Within ZIP code 59901, the EPA Safe Drinking Water Information System (SDWIS) records 12 health-based violations during the past five years across 51 water systems serving this postal area. The grade of F reflects the aggregate compliance pattern, not the current daily water quality.
Last updated: 2026-05-18 · Source: EPA SDWIS
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NORTH HAVEN HEIGHTS WATER ASSOC INC
PWSID: MT0000087
95 served
R J NORTHERN PARK
PWSID: MT0000085
50 served
PLEASANT VIEW HOMESITES W AND S DISTRICT
PWSID: MT0000086
85 served
ASPEN KNOLL
PWSID: MT0004367
75 served
ROCKY CLIFF ESTATES
PWSID: MT0004459
140 served
HANSONS TRAILER COURT
PWSID: MT0000095
40 served
RIVERVIEW OVERLOOK HOA
PWSID: MT0004631
33 served
FOYS LAKESIDE ESTATES WATER & SEWER DIST
PWSID: MT0004150
36 served
WAPITI ACRES COUNTY WATER AND SEWER DIST
PWSID: MT0003774
32 served
RIDGEVIEW WATER USERS ASSOC
PWSID: MT0001934
35 served
SPRUCE MEADOWS HOA
PWSID: MT0004662
40 served
WEST VALLEY PINES HOA INC
PWSID: MT0003414
130 served
SKYVIEW PARK
PWSID: MT0002516
55 served
THOMPSON RANCHETTES II
PWSID: MT0002893
100 served
ROSEWOOD ACRES
PWSID: MT0004658
50 served
HOLBROOK ESTATES
PWSID: MT0005154
120 served
COUNTRY LAKE HOMES WHITEFISH
PWSID: MT0003031
260 served
PANORAMIC MOUNTAIN RIVER HEIGHTS W DIST
PWSID: MT0000089
65 served
COUNTRY BOURNE
PWSID: MT0004597
25 served
DWAYNES VILLAGE
PWSID: MT0004745
40 served
TAMARACK WOODS HOA LAKESIDE
PWSID: MT0003393
180 served
SKY RANCH WATER ASSOCIATION
PWSID: MT0004198
45 served
SOUTHSIDE PUBLIC WATER SUPPLY
PWSID: MT0002652
306 served
ASHLEY HILLS HOA
PWSID: MT0004543
75 served
STILLWATER WATER DISTRICT
PWSID: MT0000078
85 served
FOX HILL ESTATES
PWSID: MT0004458
163 served
SWAN RIDGE HOA
PWSID: MT0004770
28 served
SUNRISE TERRACE SUBD NO 2
PWSID: MT0003040
131 served
QUAIL RIDGE
PWSID: MT0004283
123 served
EAST VALLEY ESTATES
PWSID: MT0004514
63 served
HALFMOON MEADOWS HOA
PWSID: MT0004976
25 served
HELENA NORTH KOA
PWSID: MT0003679
50 served
FIELDSTONE SUBDIVISION
PWSID: MT0004635
52 served
PLEASANT HILL ESTATES HOA
PWSID: MT0000088
90 served
HIDEAWAY TR PK COLUMBIA FALLS
PWSID: MT0001737
75 served
SWEETGRASS RANCH SUBDIVISION
PWSID: MT0005002
65 served
EAST EVERGREEN MOBILE MANOR
PWSID: MT0004753
155 served
DISTRICT COURT LLC
PWSID: MT0002651
50 served
GREEN ACRES COURT
PWSID: MT0000109
85 served
PONDEROSA HOMEOWNERS ASSN INC
PWSID: MT0002863
246 served
STILLWATER ESTATES COUNTY W AND S DIST
PWSID: MT0004221
130 served
GREENWOOD VILLAGE RV AND MHP
PWSID: MT0003602
195 served
COUNTRY COURT COMMUNITY INC
PWSID: MT0002819
25 served
FOREST HILL HOA
PWSID: MT0001785
50 served
NORTHFORK TR CT COLUMBIA FALLS
PWSID: MT0000110
48 served
WHITEFISH RIVER RANCH
PWSID: MT0004660
36 served
FLATHEAD COUNTY WATER AND SEWER
PWSID: MT0001744
7,775 served
HILLCREST COMMUNITY WATER
PWSID: MT0000430
65 served
HADLEY ROAD HOA
PWSID: MT0004645
33 served
TWO MILE TRACT HOA
PWSID: MT0003328
128 served
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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