Tapcensus

Wisconsin

Columbia County drinking water quality

139 active public water systems serve 64,680 people in Columbia County. 108 are compliant, 31 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 1 carries a health flag.

Active systems 139 26 community systems
People served 65K by public water systems
Systems with violations 31 22% of active systems, past 3 years
Serious violators 1 1 systems carry a health flag

Needs attention

Anchor at Lakeside Bar & Grill WI1110128 · Poynette · Transient non-community system · Serves 204 1 rule violated in the past three years. Unresolved: Public Notification Rule.
Rio Waterworks WI1110111 · Rio · Community water system · Serves 1,095 3 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.

Community water systems

26 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Portage Waterworks
Portage 		10,437 0 0
Columbus Utilities
Columbus 		5,173 2 1
Wisconsin Dells Waterworks
Wisconsin Dells 		3,232 2 0
Lodi Waterworks
Lodi 		3,146 3 1
Poynette Waterworks
Poynette 		2,520 3 0
Pardeeville Waterworks
Pardeeville 		2,151 0 0
Harmony Grove San Dist
Lodi 		1,950 0 0
Randolph Water Dept
Randolph 		1,800 2 1
Fall River Waterworks
Fall River 		1,793 2 1
Rio Waterworks
Rio 		1,095 3 2
Arlington Waterworks
Arlington 		946 3 1
Wyocena Waterworks
Wyocena 		768 1 0
Cambria Waterworks
Cambria 		767 1 0
Crystal Lake RV Resort LLC
Lodi 		725 0 0
Saddle Ridge Estates
Portage 		700 2 1
Friesland Waterworks
Friesland 		345 3 0
Poynette Mobile Estates
Poynette 		150 4 1
Wisconsin Academy Main Campus
Columbus 		115 2 1
Oakwood Terrace
Portage 		100 0 0
Suburban Heights MHP
Portage 		90 0 0
Pine Vista MHP 1
Prairie Du Sac 		60 0 0
Inch Heights LLC
Poynette 		47 0 0
Harmony Mobile Manor
Lodi 		45 0 0
Pine Haven Estates
Doylestown 		45 2 0
Capital Hill Mobile Home Park
Poynette 		36 0 0
Dells Estates
Wisconsin Dells 		30 3 1
Non-community systems (113: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
WI Dot Rest Area 12 Dekorra West Bound
Poynette 		3,255 0 0
WI Dot Rest Area 11 Dekorra East Bound
Poynette 		2,505 0 0
Loves Travel Stops Poynette
Poynette 		1,051 0 0
Cascade Mtn Ski 93 Well Main
Portage 		967 0 0
Petro Travel Plaza #403
Portage 		915 0 0
Pride of America Campground Main System Wells 1 2 and 4
Pardeeville 		912 0 0
McDonalds Restaurant Poynette
Poynette 		845 0 0
Northpoint Plaza BP
Poynette 		809 0 0
All Stop Plaza
Lodi 		718 0 0
Luckys Bar & Grille on the Lake
Lodi 		606 0 0
Zion EV Lutheran Church of Leeds
Arlington 		507 0 0
WI Dot Wayside 17 West Point
Lodi 		500 0 0
Sunset Harbor
Lodi 		410 0 0
Cascade Mtn Ski Daisy Restaurant Well
Portage 		400 0 0
Silver Springs Campsites Hilltop Well
Rio 		320 0 0
Silver Springs Campsites Office and Pool
Rio 		320 0 0
Cimarolis Supper Club
Portage 		316 0 0
Camp Wawbeek Respite Camp Lodge
Wisconsin Dells 		306 0 0
Camp Wawbeek Respite Camp Rec Center
Wisconsin Dells 		306 0 0
Camp Wawbeek Nature Center Main Well
Wisconsin Dells 		306 0 0
Hookers Resort
Poynette 		306 0 0
Remis Thirsty Moose
Poynette 		305 0 0
Indian Trails Campground Bath House
Pardeeville 		300 0 0
Indian Trails Campground East Hill
Pardeeville 		300 0 0
Bethlehem Lutheran Church
Portage 		252 0 0
Lake Wisconsin Country Club
Prairie Du Sac 		250 2 0
Trienda Holdings LLC
Portage 		240 1 0
Fitzs on the Lake
Lodi 		215 0 0
Triple Play Sports Bar & Grill
Wisconsin Dells 		208 2 1
Indian Trails Campground Restaurant
Pardeeville 		206 0 0
Subway Sandwiches Poynette
Poynette 		205 1 0
Anchor at Lakeside Bar & Grill
Poynette 		204 1 1
Interstate Easy Stop
Portage 		203 0 0
Portage One Stop
Portage 		203 0 0
Willow Mill Campground Across Lake
Rio 		200 0 0
Willow Mill Campground Main Park Side
Rio 		200 0 0
Alliant Columbia Energy Center
Pardeeville 		195 0 0
Northwoods INC of Wisconsin
Portage 		180 0 0
UW Agricultural Research Station Hdqtrs
Arlington 		180 0 0
Rhodes Well 1
Columbus 		165 0 0
Rhodes Well 2
Columbus 		165 0 0
Sky High Camping Main System
Portage 		165 0 0
Smokey Hollow Campgrounds Office Well
Lodi 		164 0 0
Smokey Hollow Campgrounds Upper Well
Lodi 		164 0 0
Grace Presbyterian Church
Pardeeville 		154 0 0
Dekorra Lutheran Church
Poynette 		153 0 0
Lake WI Evangelical Free Church
Lodi 		153 1 0
Alsum Farms & Produce INC Drinking Water System
Friesland 		145 1 0
New Testament Baptist Church
Columbus 		141 0 0
Fromm Family Foods Columbus
Columbus 		129 0 0
Kingdom Hall of Jehovahs Witnesses
Portage 		125 0 0
Comfort Suites
Portage 		110 0 0
Portage Country Club Clubhouse
Portage 		110 0 0
Club 60
Columbus 		107 0 0
Clark Cupery Property
Pardeeville 		106 0 0
Boxxx Office Gentlemens Club the
Portage 		104 2 1
Kds Bar & Grill
Lodi 		104 0 0
Liberty Square Gas Station INC
Portage 		103 0 0
East Friesland New Covenant Church
Randolph 		102 0 0
Lake Wisconsin Cmpgrd LLC
Poynette 		102 0 0
North Scott Baptist Church
Pardeeville 		102 0 0
Pride of America Campground Rental House System
Pardeeville 		102 0 0
Bonnet Prairie Lutheran Church
Rio 		100 0 0
Cambria Friesland Schools Football Building
Cambria 		100 0 0
Faith Bible Church
Rio 		100 0 0
Grande Cheese Wyocena
Wyocena 		100 0 0
Sky High Camping Hickory Heights
Portage 		100 0 0
Sky High Camping North Entrance
Portage 		100 0 0
Sassy Cow Creamery Store
Columbus 		91 0 0
Didion Ethanol
Cambria 		85 0 0
Merrimac Scoop
Lodi 		82 2 0
Caledonia Presbyterian Church
Portage 		80 0 0
Furst McNess Company
Lodi 		80 0 0
ST Patricks Catholic Church
Doylestown 		80 0 0
Duck Creek Campground
Pardeeville 		79 0 0
Spring Prairie Lutheran Church
Keyeser 		77 0 0
Bedrock Church
Rio 		76 2 0
Petersen Adventist School
Columbus 		68 0 0
Rubert Chiropractic
Fall River 		61 0 0
Luckys Lodge
Lodi 		60 0 0
Quality Inn & Suites
Lodi 		60 0 0
Schoepps Cottonwood Resort
Sauk City 		60 0 0
Durwards Glen Retreat
Baraboo 		53 0 0
Big Sky Drive in
Wisconsin Dells 		52 0 0
Fish Tales
Lodi 		52 0 0
Mid State Power & Equipment
Columbus 		52 0 0
Cascade Mtn Ski Employee Housing
Portage 		51 0 0
Days Inn Portage
Portage 		51 0 0
Mishlers Country Store
Dalton 		50 0 0
Tlc Learning Center
Lodi 		50 0 0
Johnson Sales INC
Arlington 		47 0 0
United WI Grain Producers
Friesland 		45 0 0
Cesa 5 Fort Winnebago
Portage 		44 0 0
Lighthouse Thrift Store
Columbus 		43 1 0
Burhops Lakeside Lodge
Lodi 		42 0 0
Glacier Valley Campground
Cambria 		41 0 0
Otsego Yacht Club Bar & Grill
Rio 		37 1 0
Debs North Star Tavern
Pardeeville 		36 0 0
Newport EV Lutheran Church
Wisconsin Dells 		35 0 0
WI Dnr Mackenzie 5 Office/administration Building
Poynette 		33 0 0
All 113 in the systems table
Inactive systems (162, 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 Wisconsin 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.