Tapcensus

Iowa

Johnson County drinking water quality

126 active public water systems serve 193,432 people in Johnson County. 65 are compliant, 61 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 2 carry a health flag.

Active systems 126 75 community systems
People served 193K by public water systems
Systems with violations 61 48% of active systems, past 3 years
Serious violators 1 2 systems carry a health flag

Needs attention

McBride Pointe Third Master Maintenance IA5282311 · Solon · Community water system · Serves 25 4 rules violated in the past three years
Cottage Reserve Corporation IA5200801 · Iowa City · Community water system · Serves 198 1 rule violated in the past three years. Unresolved: Lead and Copper Rule.
Lake Macbride Heights HOA IA5282305 · Solon · Community water system · Serves 69 1 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.

Community water systems

75 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Wendram Bluff Homes Water System
Iowa City 		68 2 0
Winchester Heights Subdivision
Swisher 		67 0 0
Turkey Creek Development
Iowa City 		65 0 0
Macbride Estates Development
Solon 		63 1 0
Westcott Heights Parts 1 & 2
Iowa City 		63 0 0
Indian Hills Home Owners Association
Solon 		62 1 1
Lindsey Estates
Swisher 		62 4 2
Kesslers Homeowners Assn
Iowa City 		60 1 0
Cherry Hills Subdivision
Iowa City 		59 0 0
Country View Subdivision HOA
Kalona 		55 0 0
Cumberland Ridge First Addition
North Liberty 		55 0 0
North Coralville Lake Manor
Coralville 		55 0 0
Northwood Estates
Iowa City 		52 0 0
Timberlake
Swisher 		52 5 1
Woods at Hunter Creek (part 1)
Shueyville 		50 0 0
Redwing Estates HOA
Iowa City 		48 3 0
Gallery Acres West
Solon 		43 0 0
Woodland Ridge Estates
Iowa City 		42 1 0
Woodland Heights Homeowners Assoc.
Iowa City 		41 0 0
The Meadows
Iowa City 		35 0 0
Polk Avenue Water Association
Solon 		28 0 0
Stoney Pointe Subdivision
Iowa City 		27 0 0
Chain Ridge Subdivision
Solon 		25 0 0
McBride Pointe Third Master Maintenance
Solon 		25 4 0
Terrace Acres Subdivision
Williamstown 		25 0 0
Non-community systems (51: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
F W Kent Park
Oxford 		1,169 1 0
Coralville Lake-West Overlook
Iowa City 		861 1 0
Coralville Lake-Sugar Bottom
Iowa City 		689 0 0
Cedar Ridge Vineyards
Swisher 		470 0 0
Oakdale Hospital Water System
Oakdale 		450 0 0
Shueyville United Methodist Church
Shueyville 		410 0 0
Gateway Development
Iowa City 		400 0 0
Fox Ridge Farm
Iowa City 		374 0 0
Coralville Lake-Ad Bldg
Iowa City 		275 1 0
Kalona Creamery, LLC
Kalona 		262 0 0
380bp Swisher
Swisher 		258 0 0
Sutliff Holdings LLC
Lisbon 		250 0 0
Johnson County AG Association
Iowa City 		218 4 0
Sharon Bethel Church/school
Kalona 		195 0 0
Plum Creek Boutique Dance Mor
Swisher 		160 0 0
Coralville Lake-Sandy Beach
Iowa City 		147 0 0
Pleasant Valley Golf Course
Iowa City 		130 0 0
Dans Overhead Doors
North Liberty 		110 0 0
Kava Investments LLC
Swisher 		109 1 0
Walker Homestead Farm and Winery
Iowa City 		104 2 0
American Legion Swisher Post #671
Swisher 		100 0 0
Saddleback Ridge Golf Course
Solon 		100 2 0
Stringtown Grocery
Kalona 		89 1 0
Family Church
Iowa City 		84 0 0
Syngenta Seeds LLC
Lone Tree 		75 0 0
Scales Pointe
North Liberty 		71 2 0
Little Angels Child Care Center
Swisher 		65 0 0
Lake Macbride State Park-Beach
Solon 		60 0 0
Central State Bank
Swisher 		56 0 0
Club 76 INC
North Liberty 		53 3 0
High Point City Church
Iowa City 		53 2 0
Coralville Lake Marina
Iowa City 		50 1 0
US Foods
Coralville 		50 0 0
Lake Macbride Golf Course
Solon 		45 0 0
Fairview Mennonite Church
Kalona 		41 2 1
Turf Masters Lawn & Landscape
Iowa City 		40 3 0
Community Country Store Annex
Kalona 		36 3 1
Lower Deer Creek Mennonite Church
Kalona 		36 1 0
Mid River Marina
North Liberty 		31 2 1
Lake Macbride State Park-North
Solon 		30 0 0
McBride Field Campus
Iowa City 		30 0 0
Apex Commercial Park
Iowa City 		29 1 0
Shueys
Shueyville 		29 1 0
Farmers All Natural Creamery
Wellman 		27 1 0
Lake Macbride State Park-East
Solon 		27 0 0
Sharpless Auctions
Iowa City 		27 0 0
Hawkeye Ready-Mix (coralville)
Coralville 		26 1 0
Black Squirrel Tap
Swisher 		25 2 1
Camp Iodiseca
Solon 		25 1 0
Tdccoa
Swisher 		25 0 0
The Celebration Farm LLC
Iowa City 		25 1 0
Inactive systems (129, 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 Iowa 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.