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Counties → Minnesota

Washington County, Minnesota

SDWIS compliance plate

Sheet MN163 · Washington County 195 sys · 1,652 viol · #268/3254

VIOL-SEVERE · HEALTH-HIGH · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-LARGE · BOOK-FULL

  • VIOL-SEVERE 56.9% flagged
  • HEALTH-HIGH 66.0% health
  • RANK-TOP #268/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-HIGH 91.7% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 195 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Wadena County ( -0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Washington County ranks #268 of 3,254 counties by people served, and #5 of 87 counties in Minnesota. See methodology · corpus placement.

Washington County standing, lower-flagged corpus third

Flagged-system rate 56.9% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 66.0% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 91.7% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #268 of 3,254 · #5 of 87 in Minnesota.

Flagged-rate neighbourhood around Washington County

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

0% 20% 40% 60% 80% 100% Mahnomen · lowest Wadena · near Washington · this county Watonwan · highest 22.2% 56.5% 56.8% 56.8% 56.9% 57.4% 100%

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

Water Systems

System Name Population Violations PFAS
Woodbury 82,643 17 Detected
Cottage Grove 39,712 3 Detected
Oakdale 28,674 10 Detected
Stillwater 19,462 12 Detected
Hugo 12,047 0 Detected
Forest Lake 11,800 21 Clean
Lake Elmo 10,978 73 Detected
Mahtomedi 8,134 12 Detected
Saint Paul Park 5,427 3 Detected
Oak Park Heights 4,776 16 Detected
Newport 4,000 13 Detected
Lakeland Municipal Water 3,500 3 Detected
Bayport 2,700 30 -
Cimarron Park 2,400 8 -
St. Croix Travel Information Cntr. MNDOT 1,604 51 -
Birchwood 864 35 -
Shepherd of the Valley Lutheran Church 850 2 -
Green Acres Recreation 800 7 -
MN Correctional Facility - Stillwater 781 18 -
3M Cottage Grove 740 33 -
Willernie 525 32 -
Lucy Winton Bell Athletic Field 500 0 -
Scandia Elementary School 425 6 -
Camp Galilee 400 22 -
Cottage Grove United Church of Christ 380 12 -
Afton Alps 350 0 -
Woodlund Mobile Home Park 330 9 -
Hugo Estates 300 18 -
Brookside Management Company LLC 300 7 -
Disabled Veterans Rest Camp Assn. 300 0 -
Applewood Hills Golf Course 300 14 -
River Valley Christian Church 300 7 -
Church of Jesus Christ Latter-Day Saints 300 0 -
Hidden Pines Ranch 300 7 -
Selma's Ice Cream Parlour 250 7 -
Keystone Wedding & Events 250 0 -
Oneka Ridge Golf 250 0 -
The Madison 250 11 -
White Bear Yacht Club - Main Club House 225 10 -
New Life Evangelical Church 225 24 -
Hosanna Lutheran Church 205 0 -
Oasis Cafe 200 7 -
Meister's Bar & Grill 200 0 -
Golden Acres Park 200 7 -
Memorial Lutheran Church 200 21 -
Hitching Post Motel 200 0 -
Woodbury Lutheran - Oakhill Campus 200 14 -
Camp Lakamaga 200 75 -
River Oaks Municipal Golf Course 200 0 -
Outing Lodge at Pine Point 200 0 -

Compare beyond Minnesota

Lower-flagged peers for Washington County

Cross-state counties nearest Washington County on flagged-system share (56.9%) and cumulative violation count (1,652). 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.