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Yakima, Washington Tap Water Quality

176,022 people served · 89 water systems

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Good

Yakima, Washington is a mid-sized community with 176,022 residents served by 89 distinct public water systems. Water service covers ZIP codes 98901, 98902, 98903, 98908.

Yakima's water utilities have recorded a small number of EPA health-based violations in the last five years. These were resolved through standard corrective action.

EPA reporting identifies Coliform Bacteria among the regulated contaminants associated with Yakima's recent health-based violations. Each contaminant has different sources, health implications, and recommended mitigation steps — links to the full EPA reference for each are listed alongside the violation history below.

Last updated: 2026-05-18 · Source: EPA SDWIS

Location

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Centered on ZIP-code centroids of water systems serving this city.

ZIP Codes Served

Health-Based Violations (Last 5 Years)

EPA Maximum Contaminant Level exceedances reported by water systems serving Yakima. Each entry explains the contaminant, the health risk, and recommended precautions, and links to a full guide.

EPA Code 8000 · Maximum Contaminant Level Exceedance

2

violations

EPA Limit

0 per 100 mL presence/absence

Last Reading

First Reported

Aug 2023

Most Recent

Jul 2024

What this violation means

Total coliform bacteria are themselves usually harmless, but their presence signals that the water distribution system has a vulnerability — typically a cracked pipe, loss of pressure, or back-siphonage — that could allow disease-causing pathogens to enter. Repeated coliform-positive samples trigger mandatory utility investigation.

Recommended precautions

  • If your utility issues a boil-water advisory, boil all drinking and cooking water for at least one minute.
  • Use bottled water until the advisory is lifted.
  • Ice from icemakers and beverages made before the advisory should be discarded.
  • UV light and chlorination both kill coliform bacteria — most home filters do not.

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Water Systems Serving Yakima

Sundquist TWH-Terrace Heights

PWSID: WA53AD423

192 served

Brixey H2A

PWSID: WA53AD929

100 served

PROSPECT WATER ASSN INC

PWSID: WA5301842

92 served

SUNDQUIST SUNNYSLOPE DOMESTIC

PWSID: WA53AD011

196 served

Snake River Housing Water System

PWSID: WA5300710

3,036 served

DALLESPORT MOBILE HOME PARK

PWSID: WA5308136

101 served

Jubilee

PWSID: WA5305219

30 served

TOOP WATER ASSN INC

PWSID: WA5388785

80 served

GREEN MEADOWS SUBDIVISION

PWSID: WA5329450

32 served

YAK CO - TERRACE HEIGHTS

PWSID: WA5306029

8,410 served

1 violation

CHARLENE HEIGHTS WELL CO

PWSID: WA5312239

30 served

WILLOW TREE PARK

PWSID: WA5391912

176 served

COUNTRY SQUIRE MOBILE MANOR

PWSID: WA5315515

131 served

ALPS MOBILE HOME PARK

PWSID: WA5314572

150 served

BRIDGEVIEW HOMESITES WATER ASSN

PWSID: WA5308356

80 served

BRIDLE MOOR WATER ASSOCIATION

PWSID: WA5308364

44 served

RICHARDSON WATER COMPANY

PWSID: WA5308371

188 served

CANYON VILLAGE WATER SYSTEM INC

PWSID: WA5305801

310 served

COLUMBIA RIM WATER SYSTEM

PWSID: WA5314169

77 served

COUNTRY CLUB ESTATES HOA

PWSID: WA5315501

70 served

COUNTRY MOBILE ESTATES

PWSID: WA5315514

180 served

CASCADIA PARK WATER COMPANY

PWSID: WA5311625

93 served

Meadow Park Water System

PWSID: WA5305848

48 served

BERTSCH SUBDIVISION WATER ASSN

PWSID: WA5305885

100 served

Firstfruits Farms

PWSID: WA5308690

68 served

YAK CO - CREWPORT

PWSID: WA5316242

192 served

EAST RIDGE PARK

PWSID: WA5321450

150 served

DRUSE WATER ASSOCIATION

PWSID: WA5320030

32 served

EDGEWATER

PWSID: WA5322418

30 served

YAK CO - GALA ESTATES WATER SYSTEM

PWSID: WA5323280

119 served

BURMAN ACRES WATER

PWSID: WA5309570

92 served

BROWN TAYLOR WATER CO INC

PWSID: WA5308815

30 served

COTTONWOOD GLEN WATER ASSN

PWSID: WA5315112

65 served

Whittlesey Water System

PWSID: WA53AD599

31 served

COWICHE WATER ASSOCIATION

PWSID: WA5304316

48 served

NAGLER ESTATES WATER USERS ASSN

PWSID: WA5320788

54 served

BUTTERFIELD WATER COMPANY

PWSID: WA5310100

108 served

HILLSIDE PARK ADDITION

PWSID: WA5333260

45 served

1 violation

GLEED MOBILE ESTATES

PWSID: WA5327828

76 served

HARTLINE WATER SYSTEM

PWSID: WA5331500

249 served

MARYS GARDEN

PWSID: WA5351899

280 served

YAK CO - BUENA WATER SYSTEM

PWSID: WA5334301

952 served

HILLVIEW WATER ASSN

PWSID: WA5333365

95 served

HIGH VALLEY MOBILE HOME COURT

PWSID: WA5333515

142 served

NORTH TERRA VISTA WATER USERS ASSN

PWSID: WA5361425

52 served

LAURA LEE MOBILE HOME PARK

PWSID: WA5346219

72 served

NEW HORIZONS

PWSID: WA5351151

49 served

MCAULAYS HOME SITES

PWSID: WA5352154

58 served

PLAYLAND PARK

PWSID: WA5330530

65 served

SELANDIA MANOR WATER ASSN

PWSID: WA5377410

130 served

POMONA ARTESIAN IRRIGATION COMPANY

PWSID: WA5365815

150 served

POMONA VIEW MOBILE PARK

PWSID: WA5365820

470 served

PANORAMA PLACE WATER ASSN

PWSID: WA5365919

220 served

RIVER BEND MOBILE PARK LLC

PWSID: WA5372809

75 served

SADDLE RIDGE WATER USERS

PWSID: WA5375205

60 served

Pelican Point By Cascadia LLC

PWSID: WA5366800

1,357 served

MT VIEW TRACTS

PWSID: WA5356851

31 served

HI VALLEY VIEW

PWSID: WA5300431

67 served

Tampico Drive Well Owners Assn

PWSID: WA5387144

42 served

OUTLOOK COMMUNITY WATER

PWSID: WA5364937

282 served

TIETON WATER DEPT CITY OF

PWSID: WA5388300

1,475 served

SUN TIDES VISTA HOMEOWNERS ASSN

PWSID: WA5386284

350 served

TIETON HILLS WATER CO

PWSID: WA5388298

75 served

WOLFE WATER ASSOCIATION

PWSID: WA5398045

70 served

VETERANS AFFAIR MED CTR DEPT OF

PWSID: WA5390542

785 served

Selah Hills Homeowners Cooperative

PWSID: WA5379280

300 served

SUN ACRES ROAD & WATER ASSN

PWSID: WA5385121

47 served

STARKS MOBILE HOME COURT

PWSID: WA5383825

60 served

SOUTH HILLS WATER USERS ASSN INC

PWSID: WA5381851

135 served

SKYLINE MOBILE HOME PARK

PWSID: WA5380205

340 served

NEALS VALLEY VIEW ADDITION WTR CO

PWSID: WA5358650

62 served

NOB HILL WATER ASSOCIATION

PWSID: WA5359700

38,050 served

YAKIMA WATER DIVISION CITY OF

PWSID: WA5399150

112,858 served

APPLE ACRES VILLAGE

PWSID: WA5302735

212 served

River Ridge Farmworker Housing

PWSID: WA53AD621

98 served

Doc Stewart

PWSID: WA53AD731

100 served

WOODLAND PARK MOBIL COURT

PWSID: WA5398189

75 served

DESERT VILLA

PWSID: WA5319068

100 served

WHITSTRAN HEIGHTS WATER ASSOCIATION

PWSID: WA5396550

65 served

SUN-TIDES RV PARK

PWSID: WA5385138

100 served

TERRACE PARK WATER ASSOCIATION

PWSID: WA5387600

50 served

OPR H2A

PWSID: WA53AE120

100 served

Brocious Water System

PWSID: WA53AD822

100 served

Valicoff YVH H2A Housing

PWSID: WA53AD483

96 served

GMP Orchards LLC - Harbo

PWSID: WA53AD606

96 served

ROUGK WELL #2

PWSID: WA5307866

36 served

MOUNTAIN VIEW ESTATES

PWSID: WA5356830

120 served

PUMP 8 DOMESTIC WATER ASSN

PWSID: WA5369900

30 served

GREEN VALLEY ESTATES WATER ASSN

PWSID: WA5329597

53 served

What Can You Do?

  • ✅ Request your utility's annual Consumer Confidence Report (CCR) — required by law.
  • ✅ Use an NSF-certified water filter if violations involve lead, arsenic, or PFAS.
  • ✅ Run cold water for 30 seconds before drinking if you have older plumbing (reduces lead).
  • ✅ Check back monthly — we update data from the EPA every 30 days.

About this data

This overview reflects EPA SDWIS data published as of 2026-05-18. It covers active Community Water Systems (CWS) that exceeded federal Maximum Contaminant Levels during the past five-year EPA reporting window. For up-to-the-minute information, request a current Consumer Confidence Report from your utility, or review the EPA's public dashboard.

Frequently Asked Questions

Is Yakima, Washington tap water safe to drink?

This city's water had minor EPA violations in the last 5 years.

How many EPA violations does Yakima have?

Yakima has 2 EPA health-based water violations in the last 5 years across 89 water systems serving 176,022 people.

What contaminants have been found in Yakima water?

The following EPA-regulated contaminants have been detected: 8000. View details about each contaminant, health effects, and recommended precautions above in the violations table.

Should I use a water filter in Yakima?

Using an NSF-certified water filter is recommended if your area has violations involving lead, arsenic, or PFAS. For other contaminants, consult your local water utility. Check the annual Consumer Confidence Report (CCR) for detailed guidance.

What should I do if there are violations in Yakima?

Request your water utility's annual Consumer Confidence Report (CCR), which is required by the EPA. Follow the utility's guidance on boil water advisories. Run cold water for 30 seconds before drinking if you have older plumbing. Use an NSF-certified filter if needed based on your water system's violations.

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