County · Washington
Yakima County, Washington: drinking water records
Explore EPA records for 95 community water systems across 20 ZIP codes in Yakima 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 13 of the 95 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 95 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 |
|---|---|---|---|---|---|
| Grandview City of WA5328970 | 11,010 | 540 | 0 | 1 | 1.2 ppbbelow the action level |
| Selah City of WA5377400 | 9,331 | 180 | 0 | 1 | 0 ppbbelow the action level |
| Yak Co - Terrace Heights WA5306029 | 8,410 | 300 | 0 | 1 | 0 ppbbelow the action level |
| Yakima Water Division City of WA5399150 | 112,858 | 360 | 0 | 0 | 0 ppbbelow the action level |
| Nob Hill Water Association WA5359700 | 38,050 | 300 | 0 | 0 | 0 ppbbelow the action level |
| Sunnyside City of WA5385400 | 17,194 | 180 | 0 | 0 | 1.4 ppbbelow the action level |
| Toppenish Water Department WA5388850 | 8,950 | 300 | 0 | 0 | 0 ppbbelow the action level |
| Union Gap Water WA5390250 | 6,433 | 240 | 0 | 0 | 0 ppbbelow the action level |
| Moxee Water Department WA5357300 | 5,599 | 180 | 0 | 0 | 2.2 ppbbelow the action level |
| Wapato Waterworks WA5392800 | 5,255 | 180 | 0 | 0 | 0 ppbbelow the action level |
| Granger Water Department WA5329000 | 3,993 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Zillah City of WA5399800 | 3,518 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Naches Town of WA5358100 | 3,512 | 120 | 0 | 0 | 0 ppbbelow the action level |
| Tribal Complex 105300025 | 907 | 0 | 0 | 1 | 0 ppbbelow the action level |
| White Swan 105300026 | 900 | 0 | 0 | 7 | 0 ppbbelow the action level |
| Fort Simcoe Job Corps Ctr 105300127 | 230 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Hi Valley View WA5300431 | 67 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Sun Tides Community LLC WA5386280 | 63 | 0 | 0 | 1 | 0 ppbbelow the action level |
| B & D Mobile Court 105300073 | 45 | 0 | 0 | 3 | 1 ppbbelow the action level |
| Hillside Park Addition WA5333260 | 45 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Mabton City of WA5349650 | 2,150 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Tieton Water Dept City of WA5388300 | 1,475 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Harrah Water System WA5331400 | 1,304 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Yak Co - Buena Water System WA5334301 | 952 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Adams View 105300042 | 790 | 0 | 0 | 0 | 2.0 ppbbelow the action level |
| Pomona View Mobile Park WA5365820 | 470 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sun Tides Vista Homeowners Assn WA5386284 | 350 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Skyline Mobile Home Park WA5380205 | 340 | 0 | 0 | 0 | 0.9 ppbbelow the action level |
| Selah Hills Homeowners Cooperative WA5379280 | 300 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Outlook Community Water WA5364937 | 282 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Marys Garden WA5351899 | 280 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Panorama Place Water Assn WA5365919 | 220 | 0 | 0 | 0 | 4.5 ppbbelow the action level |
| Sundquist Sunnyslope Domestic WA53AD011 | 196 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sundquist Twh-Terrace Heights WA53AD423 | 192 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Yak Co - Crewport WA5316242 | 192 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Richardson Water Company WA5308371 | 188 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Country Mobile Estates WA5315514 | 180 | 0 | 0 | 0 | 4.5 ppbbelow the action level |
| Lombard Loop Water Association WA5347820 | 180 | 0 | 0 | 0 | 2.2 ppbbelow the action level |
| Willow Tree Park WA5391912 | 176 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Alps Mobile Home Park WA5314572 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| East Ridge Park WA5321450 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Pomona Artesian Irrigation Company WA5365815 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| High Valley Mobile Home Court WA5333515 | 142 | 0 | 0 | 0 | 3 ppbbelow the action level |
| South Hills Water Users Assn INC WA5381851 | 135 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Country Squire Mobile Manor WA5315515 | 131 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Selandia Manor Water Assn WA5377410 | 130 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Wolf Point 105300051 | 125 | 0 | 0 | 0 | 2.7 ppbbelow the action level |
| Marquez Mobile Home Park WA5341640 | 120 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mountain View Estates WA5356830 | 120 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Yak Co - Gala Estates Water System WA5323280 | 119 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Moxie Community LLC WA5321740 | 114 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Butterfield Water Company WA5310100 | 108 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Bertsch Subdivision Water Assn WA5305885 | 100 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Brocious Water System WA53AD822 | 100 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Opr H2a WA53AE120 | 100 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sun-Tides RV Park WA5385138 | 100 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Whispering Pines WA5342948 | 100 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Valicoff Yvh H2a Housing WA53AD483 | 96 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Hillview Water Assn WA5333365 | 95 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Cascadia Park Water Company WA5311625 | 93 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Burman Acres Water WA5309570 | 92 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Yakima Golding Farms 1 WA5399110 | 90 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Bridgeview Homesites Water Assn WA5308356 | 80 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Toop Water Assn INC WA5388785 | 80 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Gleed Mobile Estates WA5327828 | 76 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Tieton Hills Water Co WA5388298 | 75 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Woodland Park Mobil Court WA5398189 | 75 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Laura Lee Mobile Home Park WA5346219 | 72 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Country Club Estates HOA WA5315501 | 70 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Wolfe Water Association WA5398045 | 70 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Playland Park WA5330530 | 65 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Neals Valley View Addition Wtr Co WA5358650 | 62 | 0 | 0 | 0 | 3.2 ppbbelow the action level |
| Saddle Ridge Water Users WA5375205 | 60 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Starks Mobile Home Court WA5383825 | 60 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Wanapum Indian Village WA5329075 | 60 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mcaulays Home Sites WA5352154 | 58 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Nagler Estates Water Users Assn WA5320788 | 54 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Green Valley Estates Water Assn WA5329597 | 53 | 0 | 0 | 0 | 1.9 ppbbelow the action level |
| North Terra Vista Water Users Assn WA5361425 | 52 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Terrace Park Water Association WA5387600 | 50 | 0 | 0 | 0 | 2 ppbbelow the action level |
| New Horizons WA5351151 | 49 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Cowiche Water Association WA5304316 | 48 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Sun Acres Road & Water Assn WA5385121 | 47 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Bridle Moor Water Association WA5308364 | 44 | 0 | 0 | 0 | 4.5 ppbbelow the action level |
| Tampico Drive Well Owners Assn WA5387144 | 42 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Rougk Well #2 WA5307866 | 36 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Druse Water Association WA5320030 | 32 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Green Meadows Subdivision WA5329450 | 32 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Mt Adams Country Club Estates WA5304694 | 31 | 0 | 0 | 0 | 5.2 ppbbelow the action level |
| Whittlesey Water System WA53AD599 | 31 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Brown Taylor Water Co INC WA5308815 | 30 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Charlene Heights Well Co WA5312239 | 30 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Edgewater WA5322418 | 30 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Pump 8 Domestic Water Assn WA5369900 | 30 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Naches RV Resort WA53AD938 | 13 | 0 | 0 | 0 | 0 ppbbelow the action level |
USGS · Monitoring stations
The water, more recently.
Available station readings in Yakima 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 Yakima County
20ZIP 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
- Ahtanum
- Buena
- Cliffdell
- Cowiche
- Grandview
- Granger
- Harrah
- Moxee
- Parker
- Selah
- Sunnyside
- Terrace Heights
- Tieton
- Toppenish
- Wapato
- White Swan
- Yakima
- Zillah
View ZIP areas and understand coverage
- 98901Terrace Heights
- 98902Yakima
- 98903Ahtanum
- 98908Yakima
- 98921Buena
- 98923Cowiche
- 98930Grandview
- 98932Granger
- 98933Harrah
- 98935Grandview
- 98936Moxee
- 98937Cliffdell
- 98938Sunnyside
- 98939Parker
- 98942Selah
- 98947Tieton
- 98948Toppenish
- 98951Wapato
- 98952White Swan
- 98953Zillah
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.