County · Idaho
Ada County, Idaho: drinking water records
Explore EPA records for 54 community water systems across 16 ZIP codes in Ada 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 8 of the 54 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 54 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 |
|---|---|---|---|---|---|
| Capitol Water Corp ID4010022 | 9,000 | 240 | 7 | 3 | 0 ppbbelow the action level |
| Veolia Water Idaho ID4010016 | 264,978 | 720 | 0 | 0 | 2 ppbbelow the action level |
| Meridian Water Dept ID4010097 | 147,340 | 1,440 | 2 | 0 | 3.9 ppbbelow the action level |
| Kuna City of ID4010085 | 32,038 | 300 | 0 | 0 | 0 ppbbelow the action level |
| Star Sewer and Water Dist Water System ID4010220 | 14,000 | 240 | 0 | 0 | 1 ppbbelow the action level |
| Garden City Water and Sewer System ID4010066 | 12,500 | 480 | 7 | 0 | 0 ppbbelow the action level |
| Eagle, City of (Western Zone) ID4010222 | 6,108 | 180 | 0 | 0 | 1 ppbbelow the action level |
| Eagle, City of (Eastern Zone) ID4010201 | 3,702 | 120 | 0 | 0 | 6 ppbbelow the action level |
| Idoc Mountain View Transformation Center ID4010255 | 456 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Greenhills Estates 3 ID4010069 | 200 | 0 | 0 | 1 | 2 ppbbelow the action level |
| Eagle Point Community ID4010101 | 150 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Eagle MHC ID4010123 | 135 | 0 | 0 | 1 | 7 ppbbelow the action level |
| Krizview Park ID4010178 | 120 | 0 | 0 | 1 | 3 ppbbelow the action level |
| Bittercreek Meadows Subdivision ID4010200 | 75 | 0 | 0 | 5 | 0 ppbbelow the action level |
| Franklin Domestic Water Users ID4010064 | 75 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Island Village Mobile Home Park ID4010076 | 70 | 0 | 0 | 5 | 3 ppbbelow the action level |
| Willowtree Estates Homeowner Association ID4010253 | 50 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Rivervine Subdivision ID4010245 | 25 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Idoc Sbx Complex ID4010141 | 3,309 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Idoc Idaho State Correctional Center ID4010240 | 2,204 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Dry Creek Water Company LLC ID4010266 | 1,125 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Hillsdale Estates Homeowners Assn ID4010218 | 800 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Desert View Estates Water Corp ID4010042 | 650 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Rustic Acres Mobile Home Park ID4010126 | 540 | 0 | 0 | 0 | 0 ppbbelow the action level |
| City of Eagle - Avimor ID4010272 | 490 | 0 | 0 | 0 | 6 ppbbelow the action level |
| City of Eagle - Valnova ID4010271 | 490 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Flying H Trailer Ranch ID4010062 | 430 | 0 | 0 | 0 | 7 ppbbelow the action level |
| Eagle Glen Homeowners Assn INC ID4010047 | 300 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Wymosa Water Assn INC ID4010161 | 280 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Paradise Estates Water Corp ID4010111 | 273 | 0 | 0 | 0 | 7 ppbbelow the action level |
| West Meadows Estates ID4010158 | 270 | 0 | 0 | 0 | 11 ppbbelow the action level |
| Arrowrock Ranch ID4010247 | 250 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Klugherz Water Corp ID4010083 | 200 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Eagle Meadows MHP ID4010048 | 195 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Evans Water Corp ID4010055 | 137 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Linda Vista Mobile Home Park ID4010088 | 125 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Chaparral Water Assn ID4010025 | 100 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Willowbrook Estates Property Owners ID4010160 | 100 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Hampton Homes Home Owners Assn ID4010071 | 95 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Eagle West Subd Water Assn ID4010050 | 92 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Terrace Water Corp INC ID4010036 | 84 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Stanley Pond INC ID4010139 | 72 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Grouse Point Water Company LLC ID4010232 | 70 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Malad and Hilton Water Company INC. ID4010092 | 70 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sierra Water Corp ID4010133 | 70 | 0 | 0 | 0 | 2 ppbbelow the action level |
| North Hills Mobile Village ID4010106 | 63 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Hi View Water ID4010072 | 55 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Forrey Heights ID4010063 | 49 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Amy Trailer Park ID4010068 | 46 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Scottys Mobile Home Park ID4010096 | 42 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Anderson Circle Water Corp ID4010005 | 40 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Rim Acres Mutual Water ID4010122 | 31 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Dell Subd Water Assn ID4010039 | 30 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Riley Trailer Park ID4010121 | 30 | 0 | 0 | 0 | 0 ppbbelow the action level |
USGS · Monitoring stations
The water, more recently.
Available station readings in Ada County, Idaho. 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 Ada County
16ZIP 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
- Boise City
- Eagle
- Garden City
- Kuna
- Meridian
- Star
View ZIP areas and understand coverage
- 83616Eagle
- 83634Kuna
- 83642Meridian
- 83646Meridian
- 83669Star
- 83702Boise City
- 83703Boise City
- 83704Boise City
- 83705Boise City
- 83706Boise City
- 83709Boise City
- 83712Boise City
- 83713Boise City
- 83714Garden City
- 83720Boise City
- 83725Boise City
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.