EPA data as of Oct 2026 · page updated 2026-10-29

Oregon: drinking water & radon

Oregon has 937 active community water systems. Since 2016, 318 reported health-based violations; 13 had a latest lead result above 15 ppb; 10 measured PFOA or PFOS at or above 4 ppt.

Water systems937

With violations318

Radon zone 1 ZIPs0

ZIPs likely on wells208

Radon zones in Oregon

tap a county

Zone 1 · highestZone 2 · moderateZone 3 · low

Most health-based violations

Weiss Estates Water System 36 people	78
London Water Co-Op 63 people	69
Skyview Acres Water Company 200 people	49
Warm Springs Water Treatment Plant 3,800 people	38
Galice Subdivision Water Co 33 people	34
Manzanita Hills Subdivision 30 people	30
City of Monroe 723 people	27
Garden Valley Water Association 84 people	26
City of Vale 1,837 people	23
City of Adrian 159 people	21

Highest latest lead (90th percentile)

City of Barlow 135 people	35 ppb
Brewster Community Homeowners 70 people	29.3 ppb
Big Foot MHP 60 people	28.2 ppb
Hiland Wc - Hillview 38 people	25.8 ppb
Row River Valley Water Dist 340 people	22 ppb
Simnasho Schoolie 350 people	21 ppb
Pass Creek Rv Park LLC 50 people	21 ppb
Klamath Co Project Homefront 37 people	19.3 ppb
Dikeside Moorage 45 people	16.4 ppb
Emerald Valley Mh & Rv Park 31 people	15.4 ppb

Highest PFOA / PFOS

City of Hermiston 20,000 people	12 ppt
Klamath Falls Water Dept 40,475 people	9.5 ppt
Rainbow Water District 6,300 people	9.4 ppt
City of Bend 77,704 people	7.9 ppt
City of Milton-Freewater 7,145 people	7.2 ppt
City of Milwaukie 20,946 people	7 ppt
Marcola Water District 600 people	6.8 ppt
City of Dundee 2,960 people	5.4 ppt
Sunrise Water Authority 50,003 people	4.3 ppt
Springfield Utility Board 62,100 people	4.1 ppt

Largest systems

Portland Water Bureau 666,200 people	666,200
Tualatin Valley Water District 224,600 people	224,600
Salem Public Works 199,820 people	199,820
Eugene Water & Electric Board 176,000 people	176,000
Medford Water Commission 106,068 people	106,068
City of Hillsboro 92,632 people	92,632
City of Beaverton 88,045 people	88,045
City of Bend 77,704 people	77,704
City of Gresham 73,932 people	73,932
Rockwood PUD 65,443 people	65,443

All ZIP codes in Oregon

473 ZIP codes.

97001Antelope 97002Aurora 97003Beaverton 97004Beavercreek 97005Beaverton 97006Beaverton 97007Beaverton 97008Beaverton 97009Boring 97011Brightwood 97013Canby 97014Cascade Locks 97015Clackamas 97016Clatskanie 97017Colton 97018Columbia City 97019Corbett 97020Donald 97021Dufur 97022Eagle Creek 97023Estacada 97024Fairview 97026Gervais 97027Gladstone 97028Government Camp 97029Grass Valley 97030Gresham 97031Hood River 97032Hubbard 97033Kent 97034Lake Oswego 97035Lake Oswego 97036Marylhurst 97037Maupin 97038Molalla 97039Moro 97040Mosier 97041Mount Hood Parkdale 97042Mulino 97045Oregon City 97048Rainier 97049Rhododendron 97050Rufus 97051Saint Helens 97053Warren 97054Deer Island 97055Sandy 97056Scappoose 97057Shaniko 97058The Dalles 97060Troutdale 97062Tualatin 97063Tygh Valley 97064Vernonia 97065Wasco 97067Welches 97068West Linn 97070Wilsonville 97071Woodburn 97075Beaverton 97076Beaverton 97077Beaverton 97078Beaverton 97079Beaverton 97080Gresham 97086Happy Valley 97089Damascus 97101Amity 97102Arch Cape 97103Astoria 97106Banks 97107Bay City 97108Beaver 97109Buxton 97110Cannon Beach 97111Carlton 97112Cloverdale 97113Cornelius 97114Dayton 97115Dundee 97116Forest Grove 97117Gales Creek 97118Garibaldi 97119Gaston 97121Hammond 97122Hebo 97123Hillsboro 97124Hillsboro 97125Manning 97127Lafayette 97128Mcminnville 97129Hillsboro 97130Manzanita 97131Nehalem 97132Newberg 97133North Plains 97134Oceanside 97135Pacific City 97136Rockaway Beach 97137Saint Paul 97138Seaside 97140Sherwood 97141Tillamook 97143Netarts 97144Timber 97145Tolovana Park 97146Warrenton 97147Wheeler 97148Yamhill 97149Neskowin 97201Portland 97202Portland 97203Portland 97204Portland 97205Portland 97206Portland 97207Portland 97208Portland 97209Portland 97210Portland 97211Portland 97212Portland 97213Portland 97214Portland 97215Portland 97216Portland 97217Portland 97218Portland 97219Portland 97220Portland 97221Portland 97222Portland 97223Portland 97224Portland 97225Portland 97227Portland 97228Portland 97229Portland 97230Portland 97231Portland 97232Portland 97233Portland 97236Portland 97238Portland 97239Portland 97240Portland 97242Portland 97250Portland 97251Portland 97252Portland 97253Portland 97254Portland 97256Portland 97266Portland 97267Portland 97268Portland 97269Portland 97280Portland 97281Portland 97282Portland 97283Portland 97286Portland 97290Portland 97291Portland 97292Portland 97293Portland 97294Portland 97296Portland 97298Portland 97301Salem 97302Salem 97303Salem 97304Salem 97305Salem 97306Salem 97307Keizer 97308Salem 97309Salem 97310Salem 97311Salem 97314Salem 97317Salem 97321Albany 97322Albany 97324Alsea 97325Aumsville 97326Blodgett 97327Brownsville 97329Cascadia 97330Corvallis 97331Corvallis 97333Corvallis 97335Crabtree 97336Crawfordsville 97338Dallas 97339Corvallis 97341Depoe Bay 97342Detroit 97343Eddyville 97344Falls City 97345Foster 97346Gates 97347Grand Ronde 97348Halsey 97350Idanha 97351Independence 97352Jefferson 97355Lebanon 97357Logsden 97358Lyons 97360Mill City 97361Monmouth 97362Mount Angel 97364Neotsu 97365Newport 97366South Beach 97367Lincoln City 97368Otis 97369Otter Rock 97370Philomath 97371Rickreall 97373Saint Benedict 97374Scio 97375Scotts Mills 97376Seal Rock 97377Shedd 97378Sheridan 97380Siletz 97381Silverton 97383Stayton 97384Mehama 97385Sublimity 97386Sweet Home 97388Gleneden Beach 97389Tangent 97390Tidewater 97391Toledo 97392Turner 97394Waldport 97396Willamina 97401Eugene 97402Eugene 97403Eugene 97404Eugene 97405Eugene 97406Agness 97407Allegany 97408Eugene 97409Alvadore 97410Azalea 97411Bandon 97412Blachly 97413Blue River 97414Broadbent 97415Brookings 97416Camas Valley 97417Canyonville 97419Cheshire 97420Coos Bay 97423Coquille 97424Cottage Grove 97426Creswell 97429Days Creek 97430Deadwood 97431Dexter 97434Dorena 97435Drain 97436Elkton 97437Elmira 97438Fall Creek 97439Florence 97440Eugene 97441Gardiner 97442Glendale 97443Glide 97444Gold Beach 97446Harrisburg 97447Idleyld Park 97448Junction City 97449Lakeside 97450Langlois 97451Lorane 97452Lowell 97453Mapleton 97454Marcola 97455Pleasant Hill 97456Monroe 97457Myrtle Creek 97458Myrtle Point 97459North Bend 97461Noti 97462Oakland 97463Oakridge 97464Ophir 97465Port Orford 97466Powers 97467Reedsport 97469Riddle 97470Roseburg 97471Roseburg 97473Scottsburg 97476Sixes 97477Springfield 97478Springfield 97479Sutherlin 97480Swisshome 97481Tenmile 97484Tiller 97486Umpqua 97487Veneta 97488Vida 97489Walterville 97490Walton 97491Wedderburn 97492Westfir 97493Westlake 97494Wilbur 97495Winchester 97496Winston 97497Wolf Creek 97498Yachats 97499Yoncalla 97501Medford 97502Central Point 97503White City 97504Medford 97520Ashland 97522Butte Falls 97523Cave Junction 97524Eagle Point 97525Gold Hill 97526Grants Pass 97527Grants Pass 97528Grants Pass 97530Jacksonville 97531Kerby 97532Merlin 97534O Brien 97535Phoenix 97536Prospect 97537Rogue River 97538Selma 97539Shady Cove 97540Talent 97541Trail 97543Wilderville 97544Williams 97601Klamath Falls 97602Klamath Falls 97603Klamath Falls 97604Crater Lake 97620Adel 97621Beatty 97622Bly 97623Bonanza 97624Chiloquin 97625Dairy 97626Fort Klamath 97627Keno 97630Lakeview 97632Malin 97633Merrill 97634Midland 97635New Pine Creek 97636Paisley 97637Plush 97638Silver Lake 97639Sprague River 97640Summer Lake 97641Christmas Valley 97701Bend 97702Bend 97703Bend 97707Bend 97708Bend 97709Bend 97710Fields 97711Ashwood 97712Brothers 97720Burns 97721Princeton 97722Diamond 97730Camp Sherman 97731Chemult 97732Crane 97733Crescent 97734Culver 97735Fort Rock 97736Frenchglen 97737Gilchrist 97738Hines 97739La Pine 97741Madras 97750Mitchell 97751Paulina 97752Post 97753Powell Butte 97754Prineville 97756Redmond 97758Riley 97759Sisters 97760Terrebonne 97761Warm Springs 97801Pendleton 97810Adams 97812Arlington 97813Athena 97814Baker City 97817Bates 97818Boardman 97819Bridgeport 97820Canyon City 97823Condon 97824Cove 97825Dayville 97826Echo 97827Elgin 97828Enterprise 97830Fossil 97833Haines 97834Halfway 97835Helix 97836Heppner 97837Hereford 97838Hermiston 97839Lexington 97840Oxbow 97841Imbler 97842Imnaha 97843Ione 97844Irrigon 97845John Day 97846Joseph 97848Kimberly 97850La Grande 97856Long Creek 97857Lostine 97859Meacham 97861Mikkalo 97862Milton Freewater 97864Monument 97865Mount Vernon 97867North Powder 97868Pilot Rock 97869Prairie City 97870Richland 97873Seneca 97874Spray 97875Stanfield 97876Summerville 97877Sumpter 97880Ukiah 97882Umatilla 97883Union 97884Unity 97885Wallowa 97886Weston 97901Adrian 97902Arock 97903Brogan 97904Drewsey 97905Durkee 97906Harper 97907Huntington 97908Ironside 97909Jamieson 97910Jordan Valley 97911Juntura 97913Nyssa 97914Ontario 97917Riverside 97918Vale 97920Westfall

What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.

Questions

How many water systems in Oregon have violations?

318 of 937 active community water systems in Oregon reported at least one health-based violation since 2016 (EPA SDWIS).

What is the radon risk in Oregon?

No ZIP codes are in EPA radon zone 1, 235 in zone 2 and 238 in zone 3. EPA recommends testing every home.