Out of 226 ZIP codes with data in Oregon, these are the highest-ranked areas for recorded epa violations. See also: National ZIP Codes with Most EPA Water Violations | All Oregon Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 226 |
| Highest value | 345 |
| Median value | 13 |
| State | Oregon |
Top 100 Worst ZIP Codes
| Rank | ZIP Code | City | State | Recorded EPA Violations | Safety Score |
|---|---|---|---|---|---|
| 1 | 97390 | Tidewater | OR | 345 | — |
| 2 | 97394 | Waldport | OR | 345 | — |
| 3 | 97376 | Seal Rock | OR | 272 | — |
| 4 | 97338 | Dallas | OR | 216 | — |
| 5 | 97361 | Monmouth | OR | 215 | — |
| 6 | 97603 | Klamath Falls | OR | 203 | 50/100 |
| 7 | 97601 | Klamath Falls | OR | 200 | 50/100 |
| 8 | 97378 | Sheridan | OR | 146 | — |
| 9 | 97351 | Independence | OR | 145 | — |
| 10 | 97344 | Falls City | OR | 127 | — |
| 11 | 97347 | Grand Ronde | OR | 127 | — |
| 12 | 97396 | Willamina | OR | 127 | — |
| 13 | 97420 | Coos Bay | OR | 119 | — |
| 14 | 97423 | Coquille | OR | 104 | — |
| 15 | 97458 | Myrtle Point | OR | 104 | — |
| 16 | 97459 | North Bend | OR | 103 | — |
| 17 | 97304 | Salem | OR | 96 | — |
| 18 | 97004 | Beavercreek | OR | 88 | 83/100 |
| 19 | 97754 | Prineville | OR | 84 | 67/100 |
| 20 | 97371 | Rickreall | OR | 83 | — |
| 21 | 97103 | Astoria | OR | 82 | — |
| 22 | 97023 | Estacada | OR | 78 | 83/100 |
| 23 | 97498 | Yachats | OR | 74 | — |
| 24 | 97324 | Alsea | OR | 73 | — |
| 25 | 97301 | Salem | OR | 72 | 83/100 |
| 26 | 97503 | White City | OR | 69 | 83/100 |
| 27 | 97067 | Welches | OR | 68 | — |
| 28 | 97231 | Portland | OR | 66 | 73/100 |
| 29 | 97524 | Eagle Point | OR | 63 | 83/100 |
| 30 | 97048 | Rainier | OR | 62 | — |
| 31 | 97119 | Gaston | OR | 62 | — |
| 32 | 97116 | Forest Grove | OR | 60 | 67/100 |
| 33 | 97042 | Mulino | OR | 59 | — |
| 34 | 97113 | Cornelius | OR | 59 | 67/100 |
| 35 | 97038 | Molalla | OR | 53 | 83/100 |
| 36 | 97146 | Warrenton | OR | 53 | — |
| 37 | 97017 | Colton | OR | 50 | — |
| 38 | 97539 | Shady Cove | OR | 47 | — |
| 39 | 97541 | Trail | OR | 47 | — |
| 40 | 97526 | Grants Pass | OR | 46 | 91/100 |
| 41 | 97131 | Nehalem | OR | 43 | — |
| 42 | 97527 | Grants Pass | OR | 43 | 93/100 |
| 43 | 97035 | Lake Oswego | OR | 41 | 95/100 |
| 44 | 97062 | Tualatin | OR | 41 | 82/100 |
| 45 | 97141 | Tillamook | OR | 41 | — |
| 46 | 97444 | Gold Beach | OR | 41 | — |
| 47 | 97132 | Newberg | OR | 40 | — |
| 48 | 97267 | Portland | OR | 40 | 84/100 |
| 49 | 97101 | Amity | OR | 39 | — |
| 50 | 97317 | Salem | OR | 39 | 88/100 |
| 51 | 97031 | Hood River | OR | 38 | — |
| 52 | 97355 | Lebanon | OR | 38 | 84/100 |
| 53 | 97424 | Cottage Grove | OR | 38 | 97/100 |
| 54 | 97034 | Lake Oswego | OR | 37 | 96/100 |
| 55 | 97540 | Talent | OR | 37 | 89/100 |
| 56 | 97056 | Scappoose | OR | 36 | 74/100 |
| 57 | 97426 | Creswell | OR | 36 | 98/100 |
| 58 | 97457 | Myrtle Creek | OR | 36 | — |
| 59 | 97128 | Mcminnville | OR | 35 | — |
| 60 | 97016 | Clatskanie | OR | 34 | — |
| 61 | 97532 | Merlin | OR | 34 | — |
| 62 | 97014 | Cascade Locks | OR | 33 | — |
| 63 | 97123 | Hillsboro | OR | 33 | 67/100 |
| 64 | 97130 | Manzanita | OR | 32 | — |
| 65 | 97041 | Mount Hood Parkdale | OR | 31 | — |
| 66 | 97051 | Saint Helens | OR | 31 | 76/100 |
| 67 | 97053 | Warren | OR | 31 | — |
| 68 | 97417 | Canyonville | OR | 31 | — |
| 69 | 97469 | Riddle | OR | 31 | — |
| 70 | 97068 | West Linn | OR | 30 | 99/100 |
| 71 | 97089 | Damascus | OR | 30 | 80/100 |
| 72 | 97362 | Mount Angel | OR | 30 | 91/100 |
| 73 | 97703 | Bend | OR | 30 | 73/100 |
| 74 | 97405 | Eugene | OR | 29 | 100/100 |
| 75 | 97049 | Rhododendron | OR | 28 | — |
| 76 | 97009 | Boring | OR | 27 | 90/100 |
| 77 | 97222 | Portland | OR | 27 | 74/100 |
| 78 | 97381 | Silverton | OR | 27 | 92/100 |
| 79 | 97117 | Gales Creek | OR | 26 | 75/100 |
| 80 | 97140 | Sherwood | OR | 26 | 77/100 |
| 81 | 97701 | Bend | OR | 25 | 74/100 |
| 82 | 97071 | Woodburn | OR | 24 | 91/100 |
| 83 | 97060 | Troutdale | OR | 23 | 75/100 |
| 84 | 97115 | Dundee | OR | 23 | — |
| 85 | 97015 | Clackamas | OR | 22 | 74/100 |
| 86 | 97086 | Happy Valley | OR | 22 | 76/100 |
| 87 | 97206 | Portland | OR | 22 | 76/100 |
| 88 | 97535 | Phoenix | OR | 22 | 93/100 |
| 89 | 97702 | Bend | OR | 22 | 75/100 |
| 90 | 97032 | Hubbard | OR | 21 | 88/100 |
| 91 | 97385 | Sublimity | OR | 21 | — |
| 92 | 97027 | Gladstone | OR | 20 | 90/100 |
| 93 | 97111 | Carlton | OR | 20 | — |
| 94 | 97838 | Hermiston | OR | 19 | 60/100 |
| 95 | 97011 | Brightwood | OR | 18 | — |
| 96 | 97202 | Portland | OR | 18 | 77/100 |
| 97 | 97002 | Aurora | OR | 17 | — |
| 98 | 97305 | Salem | OR | 17 | 93/100 |
| 99 | 97411 | Bandon | OR | 17 | — |
| 100 | 97013 | Canby | OR | 16 | 95/100 |
Methodology
Violation counts include all types recorded in the EPA SDWIS database: Maximum Contaminant Level (MCL) violations, treatment technique violations, and monitoring/reporting violations. Both resolved and unresolved violations are counted. Higher counts may reflect longer system histories or larger service areas.
Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-08-31.
Frequently Asked Questions
What counts as an EPA water violation?
EPA violations include exceeding Maximum Contaminant Levels (MCLs), failing to treat water properly (treatment technique violations), and not testing or reporting on schedule (monitoring violations). Health-based violations are the most serious.
Does a high violation count mean the water is unsafe now?
Not necessarily. Many violations are historical or monitoring-related. However, a pattern of repeated violations indicates systemic issues with water system management or infrastructure.
Explore More Rankings
- Worst ZIP Codes for Lead in Water in Oregon
- Lowest Home Safety Scores in Oregon
- Highest Home Safety Scores in Oregon
- Historical NFIP Claim Counts in Oregon
- ZIP Codes with Highest Energy Costs in Oregon
- ZIP Codes in EPA Radon Zone 1
- ZIP Codes with PFAS Detections in Oregon
- Least Reliable Water Systems in Oregon
- Environmental Justice Concern Areas in Oregon
- Worst ZIP Codes for Homebuyers in Oregon
- ZIP Codes with Worst CO & Gas Risk in Oregon
- Safest ZIP Codes for Gas & CO Risk in Oregon
- ZIP Codes with Worst Wildfire Smoke Risk in Oregon
- Safest ZIP Codes for Wildfire Smoke in Oregon
- All Rankings