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Counties → Wisconsin

Oconto County, Wisconsin

SDWIS compliance plate

Sheet WI083 · Oconto County 203 sys · 3,478 viol · #1750/3254

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

  • VIOL-SEVERE 82.8% flagged
  • HEALTH-MID 26.3% health
  • RANK-MID #1750/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 203 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Racine County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Oconto County ranks #1,750 of 3,254 counties by people served, and #45 of 71 counties in Wisconsin. See methodology · corpus placement.

Oconto County standing, lower-flagged corpus third

Flagged-system rate 82.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 26.3% is health-based share above the upper 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 #1,750 of 3,254 · #45 of 71 in Wisconsin.

Flagged-rate neighbourhood around Oconto County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Lafayette · near Oconto · this county Milwaukee · highest 52.1% 81.8% 82.5% 82.6% 82.8% 83.1% 95.3%

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

Water Systems

System Name Population Violations PFAS
Oconto Waterworks 4,610 33 Clean
Oconto Falls Waterworks 2,892 21 -
Gillett Waterworks 1,264 48 -
Lena Waterworks 585 25 -
Sunnyside Elementary Sch 575 169 -
Suring Waterworks 559 62 -
Abrams Elementary School 400 20 -
Lakewood Supervalu 335 0 -
McCauslin Brook Golf Course Clubhouse 220 3 -
Holiday Inn Supper Club 220 9 -
Bear Paw Scout Camp Dining Hall 200 0 -
Bear Paw Scout Camp Oasis 200 0 -
Bear Paw Scout Camp Main Shower 200 4 -
Bear Paw Scout Camp Fox 200 9 -
Bear Paw Scout Camp Joannes 200 0 -
Fairview School 143 16 -
U S F S Boot Lk N K5 110 65 -
U S F S Boot Lk S K6 110 4 -
Camp U Nah Li Ya Dining Hall 110 0 -
Camp U Nah Li Ya East Bath House 110 15 -
Northern D Lites Drive Inn 110 23 -
Karlas Kountry Kitchen 110 5 -
Echo Valley Resort Entrance 110 24 -
Crystal Waters Condominiums 110 4 -
Northern Grace Youth Camp 110 35 -
Mulligans Sports Bar 110 9 -
Luigi Pizza Palace II 110 26 -
Timberlea Drive Inn 110 0 -
Chute Pond Pk Fieldhouse 110 5 -
Dawg Haus Saloon 110 76 -
Chute Pond Pk Fisher Memorial 110 13 -
Chute Pond Pk Entrance 110 4 -
Chute Inn Family Restaurant 110 20 -
Maiden Lake Supper Club 110 1 -
Echo Valley Resort Hill 110 8 -
Evergreen Park 100 49 -
Gregg Young Cdjr Abrams 90 0 -
Rustic Acres MHP 90 81 -
Camp Nan a Bo Sho Med Bldg 90 12 -
Nicolet Plastics LLC 80 23 -
Oconto Falls MHP 80 70 -
Allen Estates LLC 75 14 -
Zahn Farms 74 0 -
Building Blocks Childcare Center 70 193 -
Primal Eats LLC 70 0 -
Camp Norwid Kitchen 70 14 -
St Johns Lutheran Sch 60 26 -
Dollar General 23863 Lakewood 55 0 -
41/141 Dino Stop 50 8 -
Lakewood Assisted Living Inc 50 0 -

Compare beyond Wisconsin

Lower-flagged peers for Oconto County

Cross-state counties nearest Oconto County on flagged-system share (82.8%) and cumulative violation count (3,478). 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.