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Counties → Oregon

Yamhill County, Oregon

SDWIS compliance plate

Sheet OR071 · Yamhill County 91 sys · 5,862 viol · #622/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · ABOVE-PEER · PFAS-LOW · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 91.2% flagged
  • HEALTH-LOW 8.8% health
  • RANK-TOP #622/3254
  • ABOVE-PEER +5.0 pp
  • PFAS-LOW 16.7% detect
  • SRC-GW GW lead 80%
  • SYS-MID 91 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Polk County ( -5 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Yamhill County ranks #622 of 3,254 counties by people served, and #10 of 36 counties in Oregon. See methodology · corpus placement.

Yamhill County standing, lower-flagged corpus third

Flagged-system rate 91.2% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 8.8% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 16.7% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #622 of 3,254 · #10 of 36 in Oregon.

Flagged-rate neighbourhood around Yamhill County

Lowest/highest poles plus in-state counties nearest Yamhill County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Polk · lowest Deschutes · near Josephine · near 86.2% 91.2% 97.1% 97.4% 98% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
McMinnville Water & Light 34,515 53 Clean
Newberg, City Of 25,138 56 Clean
Sheridan, City Of 6,494 103 Clean
Lafayette, City Of 4,423 270 Clean
Dundee, City Of 2,960 305 Detected
Dayton, City Of 2,535 103 -
Carlton, City Of 2,270 148 -
Willamina, City Of 2,239 89 -
Amity, City Of 1,810 322 -
Yamhill, City Of 1,130 112 -
Golden Enterprises 700 52 -
Delphian School 350 25 -
Cove Orchard Water Association 300 25 -
Northwest Newberg Water Assn 250 43 -
Camp Yamhill 250 234 -
Ewing Young Elem SD 29J 245 181 -
Domaine Willamette Winery 200 57 -
Monrovia North 175 431 -
Monrovia South 175 16 -
Resonance Wines - Carlton 163 0 -
Bailey Nursery III 160 55 -
Adelsheim Vineyards 140 6 -
Sunny Acres Water District 130 46 -
Cswa Chehalem Springs 130 110 -
Domaine Serene 124 3 -
Pleasant View Water Co 120 46 Clean
Hidden Meadows Water Assn Inc 110 88 -
Sokol Blosser Vineyards 110 1 -
Hopewell Water Company 100 144 -
The Preserve 100 61 -
Chehalem Valley Baptist Church 100 27 -
Durant Vineyard Tasting Room 100 5 -
The Black Dog Vineyard 100 0 -
Grange Hill Winery 100 1 -
Valley View Water Co-Op 99 77 -
Rock of Ages Rest Home 97 133 -
East Yamhill Rural WD 90 29 -
Oxberg Water System #1 90 49 -
Stoller Family Estate 85 2 -
Hopewell Community Church 80 16 -
Soter Vineyards 80 0 -
Chehalem Valley Water Assn 75 30 -
Camp Tilikum 75 382 -
Boise Cascade-Willamina Veneer 75 35 -
NW Wine Company 75 3 -
Chehalem Mtn Sun Ridge Water Co 70 103 -
Robinson Nursery Amity WS 70 405 -
Laurel Ridge Winery 68 23 -
Fox Ridge Water Co 60 34 -
Solena Estate 60 0 -

Compare beyond Oregon

Lower-flagged peers for Yamhill County

Cross-state counties nearest Yamhill County on flagged-system share (91.2%) and cumulative violation count (5,862). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.