41 Washington water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Seattle Public Utilities1,091,904 people · 10 results
- Tacoma Water Division City of448,771 people · 13 results
- Vancouver City of373,047 people · 13 results
- Bellevue City of317,330 people · 10 results
- Everett Public Works Dept. City of215,774 people · 10 results
- Alderwood Water District200,000 people · 13 results
- Redmond Water System City of147,897 people · 13 results
- Bellingham-Water Division City of135,023 people · 9 results
- Clark Public Utilities116,876 people · 21 results
- Kennewick City of114,468 people · 13 results
- Yakima Water Division City of110,899 people · 12 results
- Renton City of107,119 people · 10 results
- Northshore Utility District105,105 people · 9 results
- Lacey Water Department103,755 people · 13 results
- Marysville Utilities88,589 people · 8 results
- Lynnwood City of66,947 people · 9 results
- Sno PUD 1 - Lake Stevens60,064 people · 9 results
- Puyallup City of39,100 people · 3 results
- Spanaway Water Company31,908 people · 10 results
- Parkland Light & Water Company29,595 people · 8 results
- Port Angeles City of28,946 people · 4 results
- Centralia Public Works - Water28,164 people · 6 results
- Whitworth Water District 226,883 people · 6 results
- Mountlake Terrace City of26,402 people · 11 results
- Mukilteo Water & Wastewater Distr25,182 people · 9 results
- Vera Water & Power24,692 people · 3 results
- Oak Harbor City of23,767 people · 4 results
- Cross Valley Water District23,054 people · 6 results
- Washington State University21,506 people · 10 results
- Consolidated Irrig Dist 19 System 221,220 people · 3 results
- Anacortes City of21,105 people · 10 results
- Arlington City of20,418 people · 3 results
- Washougal City of20,292 people · 13 results
- King County Water District No 9020,100 people · 11 results
- Ferndale19,305 people · 7 results
- Spo Co Water Dist 3 Sys 118,983 people · 9 results
- West Richland City of18,280 people · 16 results
- Enumclaw Water Department17,425 people · 5 results
- Poulsbo City of17,180 people · 5 results
- Sunnyside City of17,037 people · 5 results
- Bainbridge Island City of12,486 people · 8 results