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Counties → Illinois

Jo Daviess County, Illinois

SDWIS compliance plate

Sheet IL085 · Jo Daviess County 49 sys · 2,305 viol · #1839/3254

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

  • VIOL-SEVERE 81.6% flagged
  • HEALTH-LOW 5.6% health
  • RANK-MID #1839/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-MID 49 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Jo Daviess County ranks #1,839 of 3,254 counties by people served, and #59 of 102 counties in Illinois. See methodology · corpus placement.

Jo Daviess County standing, lower-flagged corpus third

Flagged-system rate 81.6% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 5.6% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,839 of 3,254 · #59 of 102 in Illinois.

Flagged-rate neighbourhood around Jo Daviess County

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

0% 20% 40% 60% 80% 100% Sangamon · lowest Jo Daviess · this county Randolph · near Pulaski · highest 58.8% 81.5% 81.6% 81.8% 81.8% 81.8% 100%

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

Water Systems

System Name Population Violations PFAS
Galena 3,308 124 Clean
Prairie Path Water Company-Galena 2,294 76 Clean
Stockton 1,728 72 -
East Dubuque 1,565 117 -
Warren 1,323 25 -
Prairie Path Water Company-Apple Canyon 931 17 -
Hanover 863 27 Clean
Elizabeth 802 22 -
Prairie Path Water-Bahl Water Company 700 131 -
Mount Vernon Association Inc 438 17 -
Scales Mound 436 35 -
Apple River 347 218 -
The Hilltop at Menominee 300 2 -
Galena Cellars Vineyard 300 4 -
Rocky Waters Vineyard 300 0 -
Frentress Lake 233 8 -
Lacoma Golf Club 200 0 -
East Dubuque Nitrogen Fertilizers 165 26 -
Canyon Camp Boy Scouts 150 10 -
Kolb Lena Cheese Company 150 415 -
Fergedaboudit Vineyard and Winery 150 1 -
Longhollow Point HOA 125 20 -
Palace Campground - Office 100 11 -
Galena Golf Club 100 1 -
The Nora Bar 100 1 -
Swiss Inn 100 0 -
Apple River Canyon St Park-Canyon Ridge 100 7 -
Longhollow Scenic Tower Rest Area 100 0 -
Woodbine Bend Golf Course Club 100 1 -
Goldmoor Inn 100 0 -
Chestnut Mountain Resort - Edelweiss 96 5 -
Wienen Estates 95 238 -
Blanding Landing - Comfort Station 75 4 -
Blanding Landing - Campground Well 75 5 -
Palace Campground - Shower Bldg 75 11 -
Massbach Ridge Winery 60 1 -
Apple River Canyon St Park-Devils Hollow 50 2 -
Apple River Canyon St Park-Site Mgr 50 2 -
Grant Hills Motel - Pool 50 13 -
The High Country 50 9 -
Sullivans Foods (146969) 50 0 -
Walmart Galena 50 0 -
Tammys Piggly Wiggly 50 0 -
Chestnut Mountain Resort - Chalet Well 49 4 -
The Country Experience 40 7 -
River Ridge School 30 594 -
Grant Hills Motel - Office 25 11 -
Canyon Lake Services Inc 25 11 -
Vel Terra Ranch Campground 25 0 -

Compare beyond Illinois

Lower-flagged peers for Jo Daviess County

Cross-state counties nearest Jo Daviess County on flagged-system share (81.6%) and cumulative violation count (2,305). 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.