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Counties → Washington

Walla Walla County, Washington

SDWIS compliance plate

Sheet WA071 · Walla Walla County 69 sys · 8,476 viol · #695/3254

VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 92.8% flagged
  • HEALTH-LOW 12.8% health
  • RANK-UPPER #695/3254
  • PHOTO-FINISH ±0.3 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 96%
  • SYS-MID 69 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Clark County (+ 0.3 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Walla Walla County ranks #695 of 3,254 counties by people served, and #21 of 39 counties in Washington. See methodology · corpus placement.

Walla Walla County standing, mid-flagged corpus third

Flagged-system rate 92.8% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 12.8% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #695 of 3,254 · #21 of 39 in Washington.

Flagged-rate neighbourhood around Walla Walla County

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

0% 20% 40% 60% 80% 100% Grant · lowest Clark · near Pend Oreille · near Wahkiakum · highest 69.8% 92.8% 93.1% 93.2% 93.2% 93.5% 100%

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

Water Systems

System Name Population Violations PFAS
Walla Walla Water Division 42,959 141 Clean
College Place Water Dept 8,147 127 Clean
Snake River Housing Water System 3,036 50 Clean
Burbank Business Park 1,983 3 -
Waitsburg City of 1,817 20 -
Wallula Dodd Water System 1,757 108 -
Consolidated Irrigation Dist 14 1,555 27 -
Walla Walla University 1,273 34 -
Hood Park 977 4 -
Fishhook Park 846 44 -
Valle Lindo Homes 787 29 -
Veterans Affair Med Ctr Dept Of 785 189 -
Packaging Corporation of America 700 35 -
Great Basin Water Burbank 656 762 -
Green Tank Irr District 11 553 524 -
Burbank Irrigation District 4 527 27 -
Prescott Town Of 522 68 -
Columbia View Water System 500 269 -
Arlenes Addition 480 31 -
Charbonneau Park 411 76 -
Touchet School 303 354 -
Artesian Water District 8 302 30 -
Walla Walla Airport 280 36 -
Hydro Irrigation District No 9 252 8 -
Blalock Orchard Dist 10 250 58 -
Dixie Water Association 240 45 -
Rooks Park Water 201 1 -
Wallula Water District 200 53 -
Ice Harbor Dam 197 658 -
Blalock Orchards Dist 12 193 13 -
Sun Harbor SW 188 3 -
Sun Harbor Water District #3 187 406 -
Burbank Heights 177 31 -
Taggares Fruit Co 152 2,455 -
Klicker Water System 1 134 0 -
Whitman Mission National Historic 134 1 -
Sydney Heights Water Assn 130 48 -
Columbia12 Touchet Chevron 104 58 -
Flat Top Ranch-Fishhook H2A Housing 96 0 -
Borton - Burbank Heights Jubilee #1 96 0 -
Westbourne Acres 94 293 -
Summers Circle Water LLC 82 27 -
K2h Farms-Shop & Office 80 24 -
Walla Walla River Packing & Storage 75 57 -
Wine Valley Water System 71 1 -
Firstfruits Farms 68 38 -
Cottonwood Glen Water Assn 65 43 -
Precept Wine 63 8 -
Pro Pac Sales LLC 60 32 -
Bct Inc 58 34 -

Compare beyond Washington

Mid-flagged peers for Walla Walla County

Cross-state counties nearest Walla Walla County on flagged-system share (92.8%) and cumulative violation count (8,476). 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.