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Counties → Wisconsin

Marathon County, Wisconsin

SDWIS compliance plate

Sheet WI073 · Marathon County 195 sys · 5,385 viol · #559/3254

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

  • VIOL-SEVERE 81.0% flagged
  • HEALTH-MID 28.5% health
  • RANK-TOP #559/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-HIGH 80.0% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 195 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Marathon County ranks #559 of 3,254 counties by people served, and #12 of 71 counties in Wisconsin. See methodology · corpus placement.

Marathon County standing, lower-flagged corpus third

Flagged-system rate 81.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 28.5% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 80.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #559 of 3,254 · #12 of 71 in Wisconsin.

Flagged-rate neighbourhood around Marathon County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Kewaunee · near Marathon · this county Milwaukee · highest 52.1% 80.4% 80.6% 80.9% 81% 81.8% 95.3%

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

Water Systems

System Name Population Violations PFAS
Wausau Waterworks 39,994 16 Detected
Weston Municipal Utilities 16,000 159 Detected
Kronenwetter Water & Sewer Utility 6,931 16 Clean
Rib Mountain Water Utility 6,398 10 Detected
Mosinee Waterworks 3,406 28 -
Rothschild Waterworks 3,190 176 -
Abbotsford Waterworks 2,502 121 -
Schofield Waterworks 2,205 47 Detected
Spencer Waterworks 1,848 41 -
Colby Waterworks 1,829 5 -
Marathon City Waterworks 1,695 27 -
Stratford Waterworks 1,643 129 -
Edgar Waterworks 1,491 49 -
Mosinee East System 1,046 0 -
Athens Waterworks 1,025 170 -
Holy Family Catholic Church 800 0 -
Riverside Elementary School 590 106 -
Hatley Waterworks 550 259 -
Land O Lakes Inc Cheese Div 350 23 -
St Ladislaus 300 10 -
New Hope Community Church 300 26 -
Maine Water Utility 271 155 -
Maine Elementary School 255 506 -
Stoney Acres 254 0 -
St Thomas Catholic Church 225 17 -
Ntc Ag Center 225 6 -
Mullins Cheese Factory 200 123 -
Red Granite Bar 175 2 -
Hewitt Texas Elementary School 151 248 -
Maizefield Mhc (Manufactured Home Community) 145 104 -
Bethany Lutheran Church 140 31 -
Boardwalk Mhc LLC 130 32 -
Belvedere Supper Club 125 2 -
Deer Trail Village 120 399 -
Knowlton House Distillery 120 4 -
Ntc Vet Tech Lab 115 2 -
Obrien Steel 108 154 -
Mullins Cheese Retail Store 106 4 -
Trappe River Golf Club 100 10 -
Trails End Lodge 100 4 -
Lake Dubay Shores 100 46 -
G S a Camp del O Claire 100 13 -
Maple Grove Charter School 100 11 -
Pine Valley Golf Course 100 2 -
Mission Evangelical 100 12 -
Steve & Dianes Memories Ballroom 100 0 -
Veritas Steel 1 89 39 -
Veritas Steel 2 89 53 -
Wild Steer Diner 80 0 -
Camp Sturtevant 1 80 7 -

Compare beyond Wisconsin

Lower-flagged peers for Marathon County

Cross-state counties nearest Marathon County on flagged-system share (81.0%) and cumulative violation count (5,385). 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.