Tapcensus

Illinois

Knox County drinking water quality

45 active public water systems serve 49,656 people in Knox County. 20 are compliant, 25 had at least one EPA violation in the past three years, 5 are designated serious violators, and 3 carry a health flag.

Active systems 45 17 community systems
People served 50K by public water systems
Systems with violations 25 56% of active systems, past 3 years
Serious violators 5 3 systems carry a health flag

Needs attention

Wataga IL0950600 · Wataga · Community water system · Serves 965 5 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.
Henderson IL0950250 · Henderson · Community water system · Serves 375 5 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Lead and Copper Rule (LCR), and Public Notification Rule.
Cabin Fever Campground IL3151266 · Transient non-community system · Serves 26 4 rules violated in the past three years. Unresolved: E. coli (Escherichia coli), Public Notification Rule, and Revised Total Coliform Rule (RTCR).
Double Tree Hills IL3110932 · Transient non-community system · Serves 25 3 rules violated in the past three years. Unresolved: Public Notification Rule and Revised Total Coliform Rule (RTCR).
Happy Hollow Lake Ass C/o H SM IL3077305 · Transient non-community system · Serves 25 4 rules violated in the past three years. Unresolved: Public Notification Rule.

Community water systems

17 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Galesburg
Galesburg 		31,620 0 0
Abingdon
Abingdon 		3,275 1 0
Knoxville
Knoxville 		3,120 1 0
Aqua Illinois-Oak Run
 1,885 0 0
Wataga
Wataga 		965 5 1
East Galesburg
East Galesburg 		860 2 0
Yates City
Yates City 		828 1 0
Williamsfield
Williamsfield 		647 2 0
Oneida
Oneida 		644 1 0
Altona
Altona 		483 1 0
Henderson
Henderson 		375 5 3
Victoria
Victoria 		268 2 1
Rio
Rio 		265 0 0
Maquon
Maquon 		218 3 0
Windwood Water System, Inc.
 185 1 1
IL American-Cedar Water
 172 0 0
ST Augustine
St Augustine 		119 0 0
Non-community systems (28: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
I74 Spoon River Rest Area
 2,356 0 0
Camp Akita Lodge Well
 134 1 0
Lake Bracken CC Clubhouse
 120 0 0
Camp Akita/a Frame Well
 100 3 1
Dahinda UM Church
 100 0 0
Gamber Cove
 100 2 1
Lake Bracken C C Pool Well
 100 0 0
Oak Run Camping Area
 100 3 0
Camp Akita Bathhouse Well
 60 1 0
Community Bible Church
 60 0 0
Faith Bible Camp
 50 3 1
Camp Akita Girls Village
 36 3 1
Cactus Country
 30 0 0
Twisted Sisters Bar and Grill
 30 0 0
Cabin Fever Campground
 26 4 3
Double Tree Hills
 25 3 2
Galesburg East KOA
 25 0 0
Happy Hollow Lake Ass C/o H SM
 25 4 1
HI LO Grocery Abingdon
 25 0 0
HI LO Market Galesburg
 25 0 0
Knox CO Sportsmens Club
 25 1 1
Kooler Ice Victoria
 25 0 0
Lake Bracken CC Golf Course Bath Room
 25 0 0
Lake Calhoun Association #5
 25 0 0
Quick Stop
 25 0 0
Stonefort Campground
 25 4 1
Walmart Supercenter #775
 25 0 0
Woodland Hills Camping & Recreation
 25 4 2
Inactive systems (182, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Illinois records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.