Tap Truth EPA drinking water records, in plain English

County drinking water records

Johnson County, IA drinking water systems

55 community water systems serve Johnson County, IA, reporting 157,214 people served in all.

10 of them (18%) had at least one health-based violation in the last 10 years. 16 systems still have one unresolved.

53 rely mainly on groundwater and 2 on surface water, counting water bought from other systems.

Their lead service line inventories list 2,931 lead lines, 58 galvanized lines that must be replaced and 743 lines of unknown material.

19 more systems are placed in Johnson County, IA by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
55
People served, sum of each system's own figure
157,214
Systems with a health-based violation, last 10 years
10
Systems with one unresolved
16
Lead service lines in inventories
2,931

Water systems serving Johnson County

55 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Iowa City Water Department Iowa City and University Heights 68,753 Surface water 0 0 2,912
University Water System Iowa City 26,684 Surface water 2 0 0
Coralville Muni Water System Coralville 22,318 Groundwater 0 0 3
North Liberty Water Supply North Liberty 20,491 Groundwater 0 0 0
Tiffin Water Supply Tiffin 4,512 Groundwater 0 0 0
Solon Water Dept Solon 3,018 Groundwater 0 0 0
Lone Tree Muni Water System Lone Tree 1,357 Groundwater 0 1 10
Lake Ridge, Incorporated Iowa City and land outside it 1,300 Groundwater 0 1 0
Modern Manor, Inc Iowa City and land outside it 915 Groundwater 0 1 0
Hills Water Supply Hills 863 Groundwater 0 1 0
Western Hills (Mobile) Estates Coralville 760 Groundwater 0 1 0
Oxford Water Supply Oxford 722 Groundwater 0 0 6
River Heights Property Owners Assoc. Coralville and land outside it 390 Groundwater 0 1 0
Sunrise Village Mobile Home Pk Iowa City and land outside it 340 Groundwater 2 1 0
Coralville Lake Terrace North Liberty and land outside it 340 Groundwater 0 0 0
Parkview Mobile Home Court Oxford and land outside it 300 Groundwater 0 0 0
Lake Crest Manor HOA #3 Solon and land outside it 300 Groundwater 0 0 0
Iowa City MHP LLC Iowa City and land outside it 280 Groundwater 0 0 0
Iowa City Regency Mobile Home Community Iowa City and land outside it 225 Groundwater 2 0 0
Cottage Reserve Corporation Iowa City and land outside it 198 Groundwater 1 1 0
North Twin View Heights Solon and land outside it 180 Groundwater 0 0 0
Coralville Lake Manor Solon and land outside it 170 Groundwater 0 0 0
Spring Valley Homeowners Assn. Iowa City and land outside it 163 Groundwater 0 0 0
Royal Oaks Subdivision Swisher and land outside it 163 Groundwater 1 1 0
Prairie View Estates Assoc Johnson Cnty Iowa City and land outside it 155 Groundwater 0 0 0
Twin View Heights Solon and land outside it 155 Groundwater 0 0 0
Lake Vista Subdivision Swisher and land outside it 134 Groundwater 0 0 0
Lakeview Knolls Homeowners Assn. Iowa City and land outside it 122 Groundwater 0 0 0
Longview Estates HOA (North Liberty) North Liberty and land outside it 108 Groundwater 0 2 0
Corridor Ridge Subdivision Shueyville 108 Groundwater 4 0 0
Twin Valley Lakes Improvement Assn Solon and land outside it 100 Groundwater 0 0 0
Hidden Acres Subdivision Solon and land outside it 90 Groundwater 0 1 0
Oak Ridge Lake Estates Swisher and land outside it 88 Groundwater 3 1 0
Makada Homeowners Association Iowa City and land outside it 85 Groundwater 0 0 0
Lyn-Den Heights Homeowners Assoc. Iowa City and land outside it 84 Groundwater 0 1 0
Jacobs Landing HOA Shueyville and land outside it 84 Groundwater 0 0 0
Timber Trails Homeowners Association Iowa City and land outside it 80 Groundwater 0 1 0
Far Horizons Subdivision Iowa City and land outside it 80 Groundwater 0 1 0
Fisher Well Owners Association Swisher 80 Groundwater 0 0 0
Orchard Heights Subdivision Swisher 78 Groundwater 0 0 0
Rapid Creek Ridge Iowa City and land outside it 70 Groundwater 0 0 0
Lake Macbride Heights HOA Solon and land outside it 69 Groundwater 0 0 0
Winchester Heights Subdivision Shueyville and Swisher 67 Groundwater 0 0 0
Turkey Creek Development Iowa City and land outside it 65 Groundwater 0 0 0
Westcott Heights Parts 1 & 2 Iowa City and land outside it 63 Groundwater 0 0 0
Macbride Estates Development Solon and land outside it 63 Groundwater 0 0 0
Indian Hills Home Owners Association Solon and land outside it 62 Groundwater 0 0 0
Lindsey Estates Swisher and land outside it 62 Groundwater 1 2 0
Kesslers Homeowners Assn Iowa City and land outside it 60 Groundwater 4 0 0
Country View Subdivision HOA Frytown 55 Groundwater 0 0 0
Timberlake Swisher and land outside it 52 Groundwater 0 0 0
Northwood Estates Iowa City and land outside it 52 Groundwater 0 0 0
Woodland Heights Homeowners Assoc. Iowa City and land outside it 41 Groundwater 0 0 0
The Meadows Iowa City and land outside it 35 Groundwater 0 0 0
McBride Pointe Third Master Maintenance Solon and land outside it 25 Groundwater 29 0 0

Systems placed by county record in Johnson County

19 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Iadu Clear MHP LLC County on record 173 Purchased groundwater 0 5 0
Forestgate Subdivision County on record 140 Groundwater 0 0 0
Westcott Heights HOA Part Three County on record 120 Groundwater 0 0 0
Lake Woods HOA County on record 114 Groundwater 0 1 0
Riverview Estates County on record 108 Groundwater 0 0 0
Frytown Water Coop County on record 87 Groundwater 0 0 0
Orchard View Estates County on record 78 Groundwater 0 0 0
Beyonder Getaway at Sleepy Hollow County on record 70 Groundwater 0 4 0
Wendram Bluff Homes Water System County on record 68 Groundwater 1 1 0
Cherry Hills Subdivision County on record 59 Groundwater 0 0 0
North Coralville Lake Manor County on record 55 Groundwater 0 0 0
Cumberland Ridge First Addition County on record 55 Groundwater 0 0 0
Woods at Hunter Creek (Part 1) County on record 50 Groundwater 0 0 No inventory
Redwing Estates HOA County on record 48 Groundwater 0 0 0
Gallery Acres West County on record 43 Purchased groundwater 22 0 0
Woodland Ridge Estates County on record 42 Groundwater 0 1 0
Polk Avenue Water Association County on record 28 Groundwater 0 0 0
Stoney Pointe Subdivision County on record 27 Groundwater 0 0 0
Chain Ridge Subdivision County on record 25 Groundwater 0 0 0

Cities and towns in Johnson County

12 places

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Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations