County · Washington
Snohomish County, Washington: drinking water records
Explore EPA records for 125 community water systems across 27 ZIP codes in Snohomish County, then find water-testing resources and available recent monitoring-station readings.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
Drinking-water records
EPA survey and compliance records are historical reports. UCMR 5 results are available for 20 of the 125 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems in this county
All 125 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Alderwood Water District WA5301300 | 245,715 | 118 | 0 | 0 | 28 ppbat or above the action level |
| Everett Public Works Dept. City of WA5324050 | 215,774 | 240 | 0 | 0 | 3.5 ppbbelow the action level |
| Marysville Utilities WA5351900 | 88,582 | 480 | 0 | 0 | 2 ppbbelow the action level |
| Sno PUD 1 - Lake Stevens WA5380907 | 67,710 | 180 | 0 | 0 | 3.2 ppbbelow the action level |
| Arlington City of WA5302950 | 29,508 | 297 | 1 | 0 | 0 ppbbelow the action level |
| Cross Valley Water District WA5316270 | 24,695 | 420 | 3 | 0 | 3.1 ppbbelow the action level |
| Olympic View Water & Sewer District WA5363600 | 17,784 | 240 | 0 | 0 | 1.7 ppbbelow the action level |
| Stanwood Water Dept City of WA5383650 | 17,586 | 120 | 0 | 0 | 1.6 ppbbelow the action level |
| Snohomish City of WA5380915 | 16,367 | 240 | 0 | 0 | 0.8 ppbbelow the action level |
| Sultan Water Department WA5384770 | 8,424 | 180 | 0 | 0 | 1.3 ppbbelow the action level |
| Tulalip Bay Water Dist #1 105300003 | 5,968 | 120 | 0 | 0 | 0.4 ppbbelow the action level |
| Seven Lakes Water Association WA5377660 | 5,823 | 240 | 0 | 0 | 1 ppbbelow the action level |
| Granite Falls City of WA5329050 | 5,349 | 120 | 0 | 0 | 3 ppbbelow the action level |
| Gold Bar City of WA5328300 | 2,745 | 120 | 0 | 0 | 1.2 ppbbelow the action level |
| Port Susan Camp Club #3 105300092 | 1,000 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Lake Alyson WA5350691 | 463 | 0 | 0 | 1 | 2.6 ppbbelow the action level |
| Mckees Beach Assoc WA5324190 | 290 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Thunderbird Terrace Water System WA5305067 | 75 | 0 | 0 | 1 | 0.6 ppbbelow the action level |
| Tulare Beach Association WA5389650 | 54 | 0 | 0 | 1 | 1.6 ppbbelow the action level |
| Lynnwood City of WA5349270 | 68,204 | 119 | 0 | 0 | not reported |
| Silver Lake Water & Sewer District WA5379250 | 65,033 | 115 | 0 | 0 | not reported |
| Edmonds City of WA5322500 | 34,065 | 120 | 0 | 0 | not reported |
| Mukilteo Water & Wastewater Distr WA5357550 | 31,437 | 360 | 0 | 0 | not reported |
| Mountlake Terrace City of WA5357250 | 26,402 | 119 | 0 | 0 | not reported |
| Monroe Water System WA5355820 | 23,467 | 120 | 0 | 0 | not reported |
| Sno PUD 1 - Warm Beach WA5393000 | 2,977 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Darrington Town of WA5317950 | 2,246 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Port Susan Camp Club #1 105300090 | 1,500 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Sno PUD 1 - May Creek WA5352105 | 1,374 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Warm Beach Conference Grounds WA5392950 | 1,190 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Port Susan Camp Club #2 105300091 | 1,000 | 0 | 0 | 0 | 4.5 ppbbelow the action level |
| Sno PUD 1 - Storm Lake Ridge WA5344431 | 786 | 0 | 0 | 0 | 2.5 ppbbelow the action level |
| Wilderness Ridge Community Club WA5396876 | 664 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Startup Water District WA5383850 | 643 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Priest Point Beach Water INC WA5369450 | 624 | 0 | 0 | 0 | 1.9 ppbbelow the action level |
| Sno PUD 1 - Sunday Lake WA5385205 | 561 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Wilkshire Lane Water District INC WA5396930 | 460 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Index Water Dept WA5335600 | 420 | 0 | 0 | 0 | 6.6 ppbbelow the action level |
| Big Bend Landowners Association WA5306630 | 419 | 0 | 0 | 0 | 5.4 ppbbelow the action level |
| Sno PUD 1 - Skylite Tracts WA5380220 | 415 | 0 | 0 | 0 | 1.9 ppbbelow the action level |
| Tatoosh Water Company WA5387189 | 387 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Hat Island Community INC WA5331593 | 348 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sultan Estates Water System WA5384760 | 340 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Kackman Creek WA5307619 | 330 | 0 | 0 | 0 | 5.7 ppbbelow the action level |
| Cedar Springs Camp WA5317901 | 308 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Cascade Vista HOA WA5308072 | 260 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Aqua Copia/Horse Country Estates WA5334400 | 250 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Eagle Ridge WA5324731 | 250 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Marbello WA5351530 | 245 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lochaven Water WA5347640 | 225 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Indian Ridge Water Association WA5335639 | 216 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Roseland Community Club Association WA5374372 | 210 | 0 | 0 | 0 | 2.5 ppbbelow the action level |
| Mountain Loop View Tracts WA5356528 | 200 | 0 | 0 | 0 | 1.7 ppbbelow the action level |
| Meadow Ridge WA5353213 | 175 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Crystal Lake INC WA5316390 | 170 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lakeside Shores Improvement Assoc. WA5345290 | 166 | 0 | 0 | 0 | 2.4 ppbbelow the action level |
| Silvana Water Association WA5379050 | 153 | 0 | 0 | 0 | 2.1 ppbbelow the action level |
| Kathann Estates Water WA5337910 | 134 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Sam Lake Improvement Association WA5375636 | 128 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Greenwater Meadows Landowners Assn WA5329600 | 122 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Aqua Hills Marysville WA5309404 | 113 | 0 | 0 | 0 | 2.5 ppbbelow the action level |
| Skyview WA5331141 | 110 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Pilchuck Riviera #2 WA5367382 | 107 | 0 | 0 | 0 | 5.2 ppbbelow the action level |
| Arlington Terrace WA5327241 | 104 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Arlington East Mutual Water Assn. WA5302948 | 100 | 0 | 0 | 0 | 2.1 ppbbelow the action level |
| Northwest Water WA5302287 | 99 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Northwest WA5361947 | 98 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Lake Ki Sunrise Addition Water WA5344100 | 96 | 0 | 0 | 0 | 7.7 ppbbelow the action level |
| New Start Landowners Association WA5322380 | 90 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| Pilchuck Riviera #1 WA5367380 | 90 | 0 | 0 | 0 | 2.5 ppbbelow the action level |
| Whiteside Homeowners Association WA5307581 | 90 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Madison Estates 105300144 | 86 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Stilliridge WA5318707 | 83 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Gays Water District Association WA5327270 | 81 | 0 | 0 | 0 | 9.1 ppbbelow the action level |
| Meridian Water System WA5353820 | 81 | 0 | 0 | 0 | 4.3 ppbbelow the action level |
| Chealco Water Supply WA5312270 | 78 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Peoples Creek Water System WA5301916 | 76 | 0 | 0 | 0 | 2.1 ppbbelow the action level |
| Arlington View Estates Water Assoc WA5302945 | 75 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Lakewood West Water Assn. WA5344627 | 75 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Tulalip Shores Water System WA5389550 | 74 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Snug Harbor MHC WA5381150 | 71 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Happy Hill Community Club WA5330955 | 69 | 0 | 0 | 0 | 14.1 ppbbelow the action level |
| North High Rock Estates W.S. WA5324841 | 68 | 0 | 0 | 0 | 5.8 ppbbelow the action level |
| Kyak Ridge Water System WA5344381 | 66 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Silver Springs Estates Comm Assn WA5379276 | 61 | 0 | 0 | 0 | 2.3 ppbbelow the action level |
| Suddenview WA5312451 | 60 | 0 | 0 | 0 | 4.5 ppbbelow the action level |
| Sunny Shores Community Club WA5385330 | 60 | 0 | 0 | 0 | 3.8 ppbbelow the action level |
| Vista Glen WA5364340 | 58 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Arlington Heights Water Co INC WA5311134 | 57 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Cascade Crest WA5331203 | 55 | 0 | 0 | 0 | 1.6 ppbbelow the action level |
| Tulalip Wood Water System WA5389620 | 52 | 0 | 0 | 0 | 2.3 ppbbelow the action level |
| Forest Grove Mobile Home Park WA5325934 | 51 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Whispering Firs at Firetrail WA53AD238 | 51 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Mount Forest Water System WA5355874 | 50 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Twin Roads Water Association WA5302408 | 50 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Riverside Water Dist #1 WA5372844 | 48 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Seventh Heaven Country Club WA5377675 | 48 | 0 | 0 | 0 | 2.4 ppbbelow the action level |
| Panther Lake Community Water System WA5356806 | 47 | 0 | 0 | 0 | 4.1 ppbbelow the action level |
| Darrington Water Association WA5317945 | 42 | 0 | 0 | 0 | 1.7 ppbbelow the action level |
| Delia Jimicum Water District 105300135 | 42 | 0 | 0 | 0 | 0.1 ppbbelow the action level |
| Ottercrest Estates Water System WA5355205 | 42 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| East Crystal Lake Estates Community WA5330164 | 38 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Meadowbrook Homeowners Assn WA5303449 | 35 | 0 | 0 | 0 | 0.4 ppbbelow the action level |
| Lakewood Garden Tracts Water Assoc WA5342103 | 33 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Fern Bluff Estates WA5301736 | 30 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Mc Pherson Hills Water System WA5352930 | 30 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Green Velvet Water System WA5329615 | 26 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Woods Creek Water District WA5398230 | 25 | 0 | 0 | 0 | 0.4 ppbbelow the action level |
| Roosevelt Water Association WA5374150 | 3,530 | 0 | 0 | 0 | not reported |
| Highland Water District WA5332850 | 3,121 | 0 | 0 | 0 | not reported |
| Three Lakes Water Association WA5388150 | 2,198 | 0 | 0 | 0 | not reported |
| Wandering Creek Homeowners Assoc WA5323486 | 457 | 0 | 0 | 0 | not reported |
| Machias Ridge Homeowners Assoc. WA5320624 | 324 | 0 | 0 | 0 | not reported |
| Schluter Water Association WA5376650 | 224 | 0 | 0 | 0 | not reported |
| Meadow Lake Water Association WA5320637 | 171 | 0 | 0 | 0 | not reported |
| Fobes Water District WA5325750 | 156 | 0 | 0 | 0 | not reported |
| Friar Creek Water System WA5316351 | 135 | 0 | 0 | 0 | not reported |
| North Ridge Water Corp WA5361100 | 135 | 0 | 0 | 0 | not reported |
| Sno PUD 1- Creswell WA5306325 | 100 | 0 | 0 | 0 | not reported |
| Blackmans Lake Water District WA5307250 | 93 | 0 | 0 | 0 | not reported |
| Mountain View Terrace Water INC WA5338316 | 87 | 0 | 0 | 0 | not reported |
| Lake Cassidy Estates WA5342527 | 70 | 0 | 0 | 0 | not reported |
| Pilchuck 26 Tracts WA5367375 | 66 | 0 | 0 | 0 | not reported |
| Bunk Foss System WA5326140 | 36 | 0 | 0 | 0 | not reported |
| 60th Street Water Works WA5337925 | 35 | 0 | 0 | 0 | not reported |
Shaded rows report lead at or above the 15 ppb action level in their latest monitoring period. EPA sets that level for the value 9 in 10 sampled homes fall at or below; reaching it requires the utility to act, and it is not a measurement of any single tap. One system in this table is at or above it. What an action level means
USGS · Monitoring stations
The water, more recently.
Available station readings in Snohomish County, Washington. Each measurement keeps its time, unit and original source.
These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.
Recent observations load when this section comes into view.
How these readings update
We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.
Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.
Your next step
Water testing, reports & local help.
Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.
Official national directories
Water testing
Find your state’s private-well program
EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.
Water testing
Find a certified drinking-water laboratory
Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.
Public records
Find your utility’s Consumer Confidence Report
EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.
Public records
Explore USGS water observations
Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.
A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.
Understand water testing and laboratory reportsResource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction
Explore your area
Local coverage in Snohomish County
27ZIP areas in this overview
Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.
Towns and communities
- Bothell
- Darrington
- Edmonds
- Everett
- Gold Bar
- Index
- Kayak Point
- Lake Stevens
- Lynnwood
- Maltby
- Marysville
- Mill Creek
- Mountlake Terrace
- Mukilteo
- North Lynnwood
- Sisco Heights
- Startup
- Three Lakes
- Verlot
- Woods Creek
View ZIP areas and understand coverage
- 98012Mill Creek
- 98020Edmonds
- 98021Bothell
- 98026Edmonds
- 98036Lynnwood
- 98037Lynnwood
- 98043Mountlake Terrace
- 98087North Lynnwood
- 98201Everett
- 98203Everett
- 98204Everett
- 98207Everett
- 98208Everett
- 98223Sisco Heights
- 98241Darrington
- 98251Gold Bar
- 98252Verlot
- 98256Index
- 98258Lake Stevens
- 98270Marysville
- 98271Marysville
- 98272Woods Creek
- 98275Mukilteo
- 98290Three Lakes
- 98292Kayak Point
- 98294Startup
- 98296Maltby
These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.
Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.
Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.