County · Washington
Whatcom County, Washington: drinking water records
Explore EPA records for 107 community water systems across 16 ZIP codes in Whatcom 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 11 of the 107 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 107 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 |
|---|---|---|---|---|---|
| Lynden Water Department WA5349150 | 20,062 | 120 | 0 | 1 | 2.3 ppbbelow the action level |
| Lummi Tribal Water District 105300002 | 3,699 | 480 | 0 | 1 | 1.4 ppbbelow the action level |
| Bellingham-Water Division City of WA5305600 | 141,127 | 120 | 0 | 0 | 3.4 ppbbelow the action level |
| Ferndale WA5324850 | 19,305 | 60 | 0 | 0 | 5.6 ppbbelow the action level |
| Lwwsd - South Shore Water System WA5395910 | 10,028 | 120 | 0 | 0 | 4.2 ppbbelow the action level |
| Birch Bay Water & Sewer District WA5395904 | 9,046 | 180 | 0 | 0 | 1.8 ppbbelow the action level |
| Blaine City of WA5307300 | 6,319 | 180 | 0 | 0 | 1.6 ppbbelow the action level |
| Everson City of WA5324200 | 3,893 | 60 | 0 | 0 | 2.1 ppbbelow the action level |
| Columbia Valley Water District WA5366110 | 2,648 | 180 | 0 | 0 | 1.5 ppbbelow the action level |
| Whatcom County Water Dist 13 WA5395914 | 795 | 120 | 0 | 0 | 1.3 ppbbelow the action level |
| Delta Water Association WA5318750 | 450 | 0 | 0 | 18 | 10 ppbbelow the action level |
| Northwest Water Assoc. INC. WA5362000 | 400 | 120 | 2 | 0 | 1.5 ppbbelow the action level |
| Lisecc WA5343290 | 357 | 0 | 0 | 17 | 3.5 ppbbelow the action level |
| Rathbone Park Water Assoc WA5371290 | 240 | 0 | 0 | 5 | 1.8 ppbbelow the action level |
| Evergreen Mobile Park & Sales WA5324151 | 180 | 0 | 0 | 1 | 2.7 ppbbelow the action level |
| Willeys Lake Terrace Water Assn WA5397110 | 180 | 0 | 0 | 2 | 6.8 ppbbelow the action level |
| 5 Cedars 105300028 | 150 | 0 | 0 | 9 | 0 ppbbelow the action level |
| Rutsatz Road 105300088 | 150 | 0 | 0 | 1 | 6.8 ppbbelow the action level |
| Sulwhanon 105300141 | 150 | 0 | 0 | 4 | 3.5 ppbbelow the action level |
| Isle Aire Beach Association WA5336268 | 125 | 0 | 0 | 4 | 4.2 ppbbelow the action level |
| Enterprise Terrace Water Assn. WA5323485 | 95 | 0 | 0 | 1 | 1.4 ppbbelow the action level |
| Mount Baker Mobile Home Park WA5356874 | 87 | 0 | 0 | 1 | 4 ppbbelow the action level |
| Ferndale Estates LLC WA5324840 | 85 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Smith Road Water Association WA5380550 | 77 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Pleasant Valley Water System WA5367900 | 73 | 0 | 0 | 1 | 0.7 ppbbelow the action level |
| Double L Mobile Home Park WA5319890 | 58 | 0 | 0 | 1 | 9.5 ppbbelow the action level |
| Diablo Wtr Sys-Seattle City Light WA5319200 | 53 | 0 | 0 | 1 | 15.5 ppbat or above the action level |
| Calmor Cove Club WA5310562 | 44 | 0 | 0 | 6 | 1.6 ppbbelow the action level |
| Evergreen Retreat MHP WA5324164 | 39 | 0 | 0 | 1 | 1.4 ppbbelow the action level |
| Whispering Cedars 105300120 | 25 | 0 | 0 | 7 | 4.5 ppbbelow the action level |
| Nooksack Water Dept WA5359800 | 2,427 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Glacier Water District WA5395915 | 2,383 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Sumas Water Dept WA5384870 | 2,157 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sandy Point Improvement Co WA5376105 | 2,098 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Deer Creek Water Assoc. WA5318418 | 2,000 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Pole Road Water Association WA5368350 | 1,960 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Glenhaven Lakes Club WA5328050 | 1,780 | 0 | 0 | 0 | 2.6 ppbbelow the action level |
| Point Roberts Water District No 4 WA5395750 | 1,440 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Nooksack Valley Water Association WA5359850 | 1,343 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sumas Rural Water Association WA5384850 | 612 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Meadowbrook Water Association WA5353250 | 579 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Acme Water District No 18 WA5300250 | 568 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Old Settlers Water Association WA5363350 | 540 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Deming Water Assoc. WA5318800 | 501 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mount Baker Water Association WA5356500 | 500 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Louie Joe Water Association WA5329014 | 471 | 0 | 0 | 0 | 2.8 ppbbelow the action level |
| Skookum Chuck Water Association WA5379800 | 415 | 0 | 0 | 0 | 5.1 ppbbelow the action level |
| Berthusen Road Water Association WA5305875 | 409 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Custer Water Association WA5317050 | 365 | 0 | 0 | 0 | 3.6 ppbbelow the action level |
| Bell Bay Jackson Water Association WA5305450 | 350 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Newhalem Water System WA5359250 | 277 | 0 | 0 | 0 | 3.1 ppbbelow the action level |
| Raspberry Ridge Water Association WA5327631 | 276 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Y-Squalicum Water Assn WA5399550 | 260 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Guide Meridian Water Association WA5330200 | 258 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Deer Creek Water Assn/Guide South WA53AB912 | 251 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Percie Road Water Association WA5367020 | 250 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Hemmi Road Water Association WA5332350 | 236 | 0 | 0 | 0 | 2.8 ppbbelow the action level |
| Belfern Water Association WA5305370 | 228 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Maple Falls Water Coop WA5351100 | 222 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Neptune Beach Water Assoc WA5358950 | 200 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Paradise Park Water System WA5366116 | 200 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| Lwwsd - Eagleridge WA5308118 | 196 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mountain View Water Association WA5356900 | 186 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Valley View Water Assoc WA5391000 | 185 | 0 | 0 | 0 | 1.7 ppbbelow the action level |
| Enterprise Estates Water Assoc. WA5323480 | 184 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Sunset Water Association WA5386200 | 174 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Orchard Water Assoc WA5364150 | 165 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Wahl Water Assoc WA5392150 | 165 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| Chuckanut Trails Water System WA5301383 | 158 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Roederland Water Association WA5373750 | 150 | 0 | 0 | 0 | 7.4 ppbbelow the action level |
| Lwwsd - Agate Heights WA5352957 | 147 | 0 | 0 | 0 | 0 ppbbelow the action level |
| North Star Water Assoc WA5361350 | 140 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Hilltop Water Owners Association WA5333364 | 137 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Everson Water Assoc WA5324195 | 130 | 0 | 0 | 0 | 2.3 ppbbelow the action level |
| Lake Terrill Water Assoc WA5344950 | 125 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Aldergrove Water Assoc. WA5301200 | 120 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mantheys Country Mobile Park WA5350900 | 120 | 0 | 0 | 0 | 9.2 ppbbelow the action level |
| Cedar Lynn Water Assoc WA5312112 | 116 | 0 | 0 | 0 | 2.2 ppbbelow the action level |
| Lake Samish Terrace LLC WA5344540 | 115 | 0 | 0 | 0 | 4.1 ppbbelow the action level |
| Century Water Association WA5300601 | 110 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Tall Cedars Estates Water Assoc. WA5387120 | 100 | 0 | 0 | 0 | 0.9 ppbbelow the action level |
| Wickersham Water Association WA5396700 | 98 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Glacier Springs Water System WA5327755 | 88 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Flemings Platt Water Association WA5325610 | 84 | 0 | 0 | 0 | 4.1 ppbbelow the action level |
| Georgia Manor Water Assoc WA5327450 | 81 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Fairfield MHP WA5302601 | 66 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Belfern West WA5309899 | 60 | 0 | 0 | 0 | 6.9 ppbbelow the action level |
| Northwest Mobile Home Park WA5307507 | 55 | 0 | 0 | 0 | 3.9 ppbbelow the action level |
| Thornton Water Association WA5388050 | 55 | 0 | 0 | 0 | 2.5 ppbbelow the action level |
| Hampton Water Association WA5330800 | 54 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Country Haven Water Assoc WA5315510 | 50 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Kelly Road Water Association WA5337950 | 45 | 0 | 0 | 0 | 6.7 ppbbelow the action level |
| Laurel West Water Association WA5346300 | 45 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Victor Water Association WA5391650 | 43 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Anderson Creek Water Association WA5302300 | 41 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Agate Bay MHP WA5300496 | 40 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Baker View Water Assoc WA5304050 | 40 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Calman James L. WA5302011 | 40 | 0 | 0 | 0 | 2.8 ppbbelow the action level |
| Royal Coachman Mobil Est WA5374705 | 37 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Sunset Water & Maintenance Assoc WA5306514 | 35 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Owners Assoc of Beach Club Condos WA5329746 | 31 | 0 | 0 | 4 | not reported |
| River Rd Water Association WA5372800 | 30 | 0 | 0 | 0 | 2.2 ppbbelow the action level |
| Grandview Beach Water Assoc INC WA5328950 | 28 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Whatcom County Water Dist #7 WA5395900 | 1,410 | 0 | 0 | 0 | not reported |
| Whatcom County Water Dist #2 WA5395700 | 1,353 | 0 | 0 | 0 | not reported |
| Glen Cove Water Association WA5327950 | 39 | 0 | 0 | 0 | not reported |
| Hollingsworth Water Assoc INC WA5364450 | 28 | 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 Whatcom 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 Whatcom County
16ZIP 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
- Acme
- Bellingham
- Birch Bay
- Custer
- Deming
- Ferndale
- Kendall
- Lynden
- Nooksack
- Peaceful Valley
- Point Roberts
- Rockport
- Sumas
View ZIP areas and understand coverage
- 98220Acme
- 98225Bellingham
- 98226Bellingham
- 98229Bellingham
- 98230Birch Bay
- 98240Custer
- 98244Kendall
- 98247Deming
- 98248Ferndale
- 98262
- 98264Lynden
- 98266Peaceful Valley
- 98276Nooksack
- 98281Point Roberts
- 98283Rockport
- 98295Sumas
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.