Utilities in Washington
9,956 systems (SDWIS/Fed snapshot). Search or browse pages — open any row for PFAS monitoring, violation counts, and filter recommendations.
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MATS MATS BEACH WATER SYSTEM
WA53AA350 · 15 served
MATS VIEW
WA5305536 · 52 served
MATSON - MATTAWA CAMPUS
WA53AD034 · 48 served
MATSON - SELAH CAMPUS
WA53AD048 · 96 served
Matson - Selah Campus #2
WA53AD679 · 96 served
Mattawa City of
WA5352000 · 5,370 served
MATTESON WATER SYSTEM
WA53AA033 · 5 served
MATTFELD WATER
WA53AA077 · 4 served
MATTHEWS VISTA RANCHETTES WATER SY
WA5352050 · 15 served
MAURY HILLS WATER SYSTEM
WA53AA158 · 7 served
MAURY MUTUAL WATER CO
WA5352100 · 233 served
MAVERICK 1
WA5302928 · 106 served
MAXVALE 618
WA5307486 · 88 served
MAXWELTON BEACH
WA5352103 · 32 served
MAXWELTON CREEK CO-HOUSING
WA5307475 · 13 served
Maxwelton Water System
WA5310811 · 1,700 served
May Nursery TWH
WA53AE167 · 96 served
MAY VOLT HILLS
WA5317690 · 106 served
MAYER WATER
WA53AA075 · 8 served
MAYFAIR CLASS 2 WS
WA5323721 · 30 served
MAYFIELD KAMPER KLUB
WA5352112 · 87 served
MAYFIELD LAKE COUNTY PARK
WA5352108 · 500 served
MAYFIELD LAKE PARK
WA5344230 · 107 served
MAYFIELD LAKE YOUTH CAMP
WA5344243 · 39 served
MAYFIELD POWER PLANT
WA5352110 · 32 served
MAYFIELD RV PARK
WA5311154 · 165 served
MAYR BROTHERS HATCHERY
WA53FW023 · 4 served
MAYTOWN REST AREA
WA53HD445 · 3,134 served
MAYTOWN TRAILER PARK
WA5352115 · 25 served
MAYTOWN TRUCK STOP
WA5300262 · 44 served
MAZAMA SNOW CAMP
WA53HD444 · 25 served
Mazama Store
WA5334216 · 109 served
Mazama Water Association
WA53AB604 · 31 served
Mazama Woods
WA5352118 · 45 served
MC ALLISTER CREEK
WA5352150 · 36 served
MC CABE WATER COOP
WA5352165 · 25 served
MC CORKLES MARKET
WA5396570 · 106 served
MC COY LAKE HOUSING SITE
WA53IH501 · 25 served
MC DANIELS TRAILER PARK W S
WA5352280 · 81 served
MC DOUGAL ROAD WATER SYSTEM
WA5352300 · 35 served
MC DUFFY WATER SYSTEM
WA5307467 · 9 served
MC KELVEY
WA5352648 · 24 served
MC KENNY CAMP
WA5352660 · 25 served
MC KENZIE LABOR CAMP
WA5352680 · 25 served
MC KINLEY INDIAN MISSION
WA53IH000 · 25 served
MC LAINS COVE WATER SUPPLY
WA5352740 · 25 served
MC LANE ELEMENTARY SCHOOL
WA5352223 · 25 served
MC LEOD N
WA5352750 · 25 served
MC MAHAN WATER SYSTEM
WA5322526 · 40 served
MC PHERSON HILLS WATER SYSTEM
WA5352930 · 30 served