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Counties → Illinois

Henry County, Illinois

SDWIS compliance plate

Sheet IL073 · Henry County 77 sys · 5,798 viol · #1045/3254

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

  • VIOL-SEVERE 81.8% flagged
  • HEALTH-MID 33.7% health
  • RANK-UPPER #1045/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-HIGH 50.0% detect
  • SRC-GW GW lead 100%
  • SYS-MID 77 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Randolph County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Henry County ranks #1,045 of 3,254 counties by people served, and #31 of 102 counties in Illinois. See methodology · corpus placement.

Henry County standing, lower-flagged corpus third

Flagged-system rate 81.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 33.7% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,045 of 3,254 · #31 of 102 in Illinois.

Flagged-rate neighbourhood around Henry County

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

0% 20% 40% 60% 80% 100% Sangamon · lowest Henry · this county Edgar · near Pulaski · highest 58.8% 81.6% 81.8% 81.8% 81.8% 82.1% 100%

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

Water Systems

System Name Population Violations PFAS
Kewanee 12,509 432 Clean
Geneseo 6,539 35 Detected
Colona West 2,640 109 -
Colona East 2,501 47 -
Galva 2,449 215 -
Cambridge 2,086 108 -
Orion 1,754 21 -
Walmart Kewanee 1,000 0 -
Atkinson 955 58 -
Baka Krisdala Rest Area W Bound 900 2 -
Baka Krisdala Rest Area E Bound 900 2 -
Annawan 843 42 -
Woodhull 771 25 -
Alpha 626 90 -
Andover 565 314 -
Geneseo Hills Subdivision 500 269 -
M and a Country Store 500 0 -
Buysse Subdivision 380 35 -
Sunny Hill Estates Subdivision 375 26 -
Rustic Acres Water Association 260 198 -
Hazelwood Heights Subdivision 235 37 -
Kewanee Lsrc 200 0 -
Cornerstone Retreat Center 200 21 -
Orion Food Center 200 0 -
Shadow Lake 200 3 -
Whispering Pines 200 0 -
Country Estates Subdivision 188 56 -
Kone Inc 160 31 -
Hazelwood 4th Addition 140 22 -
Colona United Methodist Church 140 8 -
Timber Brook Estates 120 33 -
Bishop Hill 113 72 -
Ophiem PWS 110 68 -
Hillcrest Home 103 168 -
Lynn Water Association, Inc 100 66 -
Lynwood 3rd Addition 100 627 -
North Hazelwood Sbdv 100 52 -
Oakwood Country Club 100 12 -
The Stables, LLC 100 9 -
Timbrook Field City of Colona 100 7 -
Faith Baptist Church (122796) 100 12 -
Lavender Crest Winery 100 0 -
Oak View Estates 95 8 -
Wolf Ridge Well Corporation 95 124 -
Timber Ridge Sbdv 90 105 -
Geneseo Hickory Hills HOA 83 285 -
Blackhawk College East Campus 80 14 -
Osco Mutual Water Supply Company, Inc. 80 103 -
Lake Lynwood Water System 75 170 -
Hazelwood West Subdivision 70 25 -

Compare beyond Illinois

Lower-flagged peers for Henry County

Cross-state counties nearest Henry County on flagged-system share (81.8%) and cumulative violation count (5,798). 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.