County · Iowa
Johnson County, Iowa: drinking water records
Explore EPA records for 74 community water systems across 13 ZIP codes in Johnson County, then find water-testing resources and available recent monitoring-station readings.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
Drinking-water records
EPA survey and compliance records are historical reports. UCMR 5 results are available for 5 of the 74 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems in this county
All 74 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| University Water System IA5225101 | 26,684 | 120 | 0 | 2 | 0 ppbbelow the action level |
| Iowa City Water Department IA5225079 | 68,753 | 95 | 0 | 0 | 4 ppbbelow the action level |
| North Liberty Water Supply IA5252072 | 23,276 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Coralville Muni Water System IA5208071 | 22,318 | 60 | 0 | 0 | 3 ppbbelow the action level |
| Sunrise Village Mobile Home Pk IA5200602 | 340 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Iowa City MHP LLC IA5200601 | 280 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Iowa City Regency Mobile Home Community IA5225673 | 225 | 0 | 0 | 2 | 2 ppbbelow the action level |
| Royal Oaks Subdivision IA5282303 | 163 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Corridor Ridge Subdivision IA5280303 | 108 | 0 | 0 | 4 | 3 ppbbelow the action level |
| Oak Ridge Lake Estates IA5225302 | 88 | 0 | 0 | 3 | 1 ppbbelow the action level |
| Lindsey Estates IA5285301 | 62 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Kesslers Homeowners Assn IA5200802 | 60 | 0 | 0 | 6 | 2 ppbbelow the action level |
| Gallery Acres West IA5282306 | 43 | 0 | 0 | 21 | 0 ppbbelow the action level |
| Mcbride Pointe Third Master Maintenance IA5282311 | 25 | 0 | 0 | 31 | 0 ppbbelow the action level |
| Tiffin Water Supply IA5288021 | 7,577 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Solon Water Dept IA5282062 | 3,018 | 0 | 0 | 0 | 7 ppbbelow the action level |
| Lone Tree Muni Water System IA5240095 | 1,357 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Lake Ridge, Incorporated IA5225315 | 1,300 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Modern Manor, INC IA5225601 | 915 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Hills Water Supply IA5221001 | 863 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Western Hills (Mobile) Estates IA5208600 | 760 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Oxford Water Supply IA5260017 | 722 | 0 | 0 | 0 | 9 ppbbelow the action level |
| River Heights Property Owners Assoc. IA5200318 | 390 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Coralville Lake Terrace IA5200817 | 340 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Lake Crest Manor HOA #3 IA5200891 | 300 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Parkview Mobile Home Court IA5200603 | 300 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Cottage Reserve Corporation IA5200801 | 198 | 0 | 0 | 0 | 2 ppbbelow the action level |
| North Twin View Heights IA5200813 | 180 | 0 | 0 | 0 | 6 ppbbelow the action level |
| Iadu Clear MHP LLC IA5288601 | 173 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Coralville Lake Manor IA5200825 | 170 | 0 | 0 | 0 | 6 ppbbelow the action level |
| Spring Valley Homeowners Assn. IA5225303 | 163 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Prairie View Estates Assoc Johnson Cnty IA5225326 | 155 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Twin View Heights IA5282301 | 155 | 0 | 0 | 0 | 10 ppbbelow the action level |
| Forestgate Subdivision IA5225307 | 140 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lake Vista Subdivision IA5282302 | 134 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Lakeview Knolls Homeowners Assn. IA5200304 | 122 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Westcott Heights HOA Part Three IA5225327 | 120 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lake Woods HOA IA5280305 | 114 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Longview Estates HOA (North Liberty) IA5252302 | 108 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Riverview Estates IA5200347 | 108 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Twin Valley Lakes Improvement Assn IA5200861 | 100 | 0 | 0 | 0 | 5 ppbbelow the action level |
| Hidden Acres Subdivision IA5282308 | 90 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Frytown Water Coop IA5291301 | 87 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Makada Homeowners Association IA5225304 | 85 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Jacobs Landing HOA IA5280306 | 84 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Lyn-Den Heights Homeowners Assoc. IA5225301 | 84 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Far Horizons Subdivision IA5225386 | 80 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Fisher Well Owners Association IA5285305 | 80 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Timber Trails Homeowners Association IA5200303 | 80 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Orchard Heights Subdivision IA5285303 | 78 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Orchard View Estates IA5282304 | 78 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Beyonder Getaway at Sleepy Hollow IA5260601 | 70 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Rapid Creek Ridge IA5225387 | 70 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Lake Macbride Heights HOA IA5282305 | 69 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Wendram Bluff Homes Water System IA5225306 | 68 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Winchester Heights Subdivision IA5285302 | 67 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Turkey Creek Development IA5225316 | 65 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Macbride Estates Development IA5282310 | 63 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Westcott Heights Parts 1 & 2 IA5225325 | 63 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Indian Hills Home Owners Association IA5280302 | 62 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Cherry Hills Subdivision IA5225305 | 59 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Country View Subdivision HOA IA9233899 | 55 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Cumberland Ridge First Addition IA5252301 | 55 | 0 | 0 | 0 | 2 ppbbelow the action level |
| North Coralville Lake Manor IA5200889 | 55 | 0 | 0 | 0 | 14 ppbbelow the action level |
| Northwood Estates IA5225308 | 52 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Timberlake IA5200810 | 52 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Redwing Estates HOA IA5225313 | 48 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Woodland Ridge Estates IA5225333 | 42 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Woodland Heights Homeowners Assoc. IA5225309 | 41 | 0 | 0 | 0 | 1 ppbbelow the action level |
| The Meadows IA5225321 | 35 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Polk Avenue Water Association IA5200899 | 28 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Stoney Pointe Subdivision IA5225317 | 27 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Chain Ridge Subdivision IA5282307 | 25 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Woods at Hunter Creek (Part 1) IA5280304 | 50 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Johnson County, Iowa. Each measurement keeps its time, unit and original source.
These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.
Recent observations load when this section comes into view.
How these readings update
We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.
Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.
Your next step
Water testing, reports & local help.
Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.
Official national directories
Water testing
Find your state’s private-well program
EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.
Water testing
Find a certified drinking-water laboratory
Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.
Public records
Find your utility’s Consumer Confidence Report
EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.
Public records
Explore USGS water observations
Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.
A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.
Understand water testing and laboratory reportsResource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction
Explore your area
Local coverage in Johnson County
13ZIP areas in this overview
Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.
Towns and communities
- Coralville
- Hills
- Iowa City
- Kalona
- Lone Tree
- North Liberty
- Oxford
- Shueyville
- Solon
- Tiffin
View ZIP areas and understand coverage
- 52235Hills
- 52240Iowa City
- 52241Coralville
- 52242Iowa City
- 52245Iowa City
- 52246Iowa City
- 52247Kalona
- 52317North Liberty
- 52322Oxford
- 52333Solon
- 52338Shueyville
- 52340Tiffin
- 52755Lone Tree
These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.
Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.
Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.