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Counties → Wisconsin

Oneida County, Wisconsin

SDWIS compliance plate

Sheet WI085 · Oneida County 346 sys · 4,836 viol · #1098/3254

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

  • VIOL-SEVERE 65.6% flagged
  • HEALTH-LOW 16.4% health
  • RANK-UPPER #1098/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-HIGH 100.0% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 346 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Chippewa County (+ 0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Oneida County ranks #1,098 of 3,254 counties by people served, and #29 of 71 counties in Wisconsin. See methodology · corpus placement.

Oneida County standing, lower-flagged corpus third

Flagged-system rate 65.6% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 16.4% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 100.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,098 of 3,254 · #29 of 71 in Wisconsin.

Flagged-rate neighbourhood around Oneida County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Chippewa · near Rusk · near Milwaukee · highest 52.1% 65.6% 65.8% 65.8% 66.3% 66.3% 95.3%

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

Water Systems

System Name Population Violations PFAS
Rhinelander Water & Wastewater 8,234 333 Detected
Lakeland Sanitary Dist 1 2,381 20 -
Minocqua Hazelhurst Elem Sch 650 30 -
Three Lakes Sanitary District 500 33 -
Scouting America Camp Tesomas Program Center and Dining Hall 500 0 -
WI DNR Clear Lk Cmpgd 24 450 0 -
WI DNR Clear Lk Cmpgd 23 450 4 -
WI DNR Clear Lk Cmpgd 10 450 0 -
WI DNR Clear Lk Cmpgd 9 450 0 -
WI DNR Clear Lk Cmpgd 8 450 0 -
WI DNR Clear Lk Cmpgd 7 450 0 -
Pelican Elementary School 353 85 -
Honey Rock Camp Chrouser Center 350 2 -
Camp Luther Shower House Well 350 0 -
Northernaire Sanitary District 315 56 -
Wildwood Wildlife Park 300 0 -
Rock of Ages Lutheran Church 300 4 -
Holy Family Catholic Church 300 0 -
Wildwood Wildlife Park Jambo Hut 300 5 -
WI DNR Clear Lk Cmpgd Shower 300 0 -
Pines Event Center The 280 14 -
Willow Haven 260 30 -
Marshfield Clinic Woodruff Center 260 8 -
Camp Agawak Main 250 10 -
Chippewa Ranch Camp Mess Hall 225 3 -
White Stag Inn 200 19 -
WI DNR Buffalo Lk Cmpgd 18 200 0 -
WI DNR Clear Lk Pic 14 200 5 -
Holiday Acres Main 200 10 -
Grace Foursquare Church 200 0 -
Camp Kawaga 3 Field Bubbler 200 6 -
Camp Kawaga 1 Bide a Wee 200 9 -
West Bay Cmpng Rsrt Main Bldg 200 4 -
Camp Kawaga 7 Mess Hall 200 0 -
Camp Kawaga 6 Porcupine 200 4 -
Camp Kawaga 5 Crows Nest 200 0 -
Honey Rock Camp Lower Plaza 200 24 -
Scouting America Camp Tesomas East Shower House 200 0 -
Scouting America Camp Tesomas Senior Staff Housing 200 0 -
Scouting America Camp Tesomas West Camper Shower House 200 0 -
Three Lakes Town Market 200 0 -
Spangs Italian Restaurant 200 12 -
Camp Deerhorn 1 Laundry 190 4 -
Camp Deerhorn 3 Bath House 190 4 -
Camp Deerhorn 2 Office 190 0 -
Crescent Lake Bible Camp 175 8 -
Camp Horseshoe West Shower Building 160 4 -
Camp Horseshoe Main Well 160 0 -
Camp Horseshoe Complex Court 160 0 -
Pelican Lake Campground LLC 150 0 -

Compare beyond Wisconsin

Lower-flagged peers for Oneida County

Cross-state counties nearest Oneida County on flagged-system share (65.6%) and cumulative violation count (4,836). 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.