County · Idaho
Canyon County, Idaho: drinking water records
Explore EPA records for 83 community water systems across 10 ZIP codes in Canyon 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 3 of the 83 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 83 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 |
|---|---|---|---|---|---|
| Nampa City of ID3140080 | 100,200 | 780 | 0 | 0 | 2 ppbbelow the action level |
| Caldwell City of ID3140013 | 74,000 | 887 | 0 | 0 | 0 ppbbelow the action level |
| Middleton City of ID3140074 | 13,190 | 420 | 0 | 0 | 2 ppbbelow the action level |
| Lansing Meadows ID3140231 | 320 | 0 | 0 | 1 | 7 ppbbelow the action level |
| Evergreen Mobile Park ID3140035 | 284 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Indian Village ID3140193 | 225 | 0 | 0 | 11 | 5 ppbbelow the action level |
| Drake Subd ID3140028 | 150 | 0 | 0 | 24 | 0 ppbbelow the action level |
| Sky Ranch Estates ID3140221 | 104 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Karcher Acres Subd ID3140048 | 100 | 0 | 0 | 1 | 4 ppbbelow the action level |
| M & T Water Corp ID3140097 | 100 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Pleasant View Manor ID3140079 | 100 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Purple Sage Community ID3140091 | 98 | 0 | 0 | 1 | 2 ppbbelow the action level |
| Idaho Youth Ranch Hands of Promise ID3140274 | 95 | 0 | 0 | 7 | 0 ppbbelow the action level |
| Maverick Subd Lasher Construction ID3140069 | 90 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Westview Shervik Subd ID3140137 | 78 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Rich Subd ID3140096 | 60 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Valley View Water ID3140130 | 57 | 0 | 0 | 2 | 0.6 ppbbelow the action level |
| Christis Mobile Park ID3140142 | 50 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Northstar Subdivision ID3140278 | 50 | 0 | 0 | 4 | 3 ppbbelow the action level |
| Vanal Heights Well Assn ID3140133 | 48 | 0 | 0 | 7 | 0 ppbbelow the action level |
| Locust Subd ID3140066 | 42 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Shipman Place Subd ID3140109 | 40 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Sunnyridge I Subd ID3140119 | 35 | 0 | 0 | 4 | 3 ppbbelow the action level |
| Parma City of ID3140089 | 2,250 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Wilder City of ID3140138 | 1,690 | 0 | 0 | 0 | 5 ppbbelow the action level |
| Caldwell Housing Authority ID3140012 | 1,100 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Greenleaf City of ID3140041 | 846 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Melba City of ID3140070 | 648 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Notus City of ID3140083 | 539 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Shalimar Subd ID3140107 | 370 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Belle Aire Acres 2 ID3140009 | 350 | 0 | 0 | 0 | 1 ppbbelow the action level |
| El Rancho Heights ID3140034 | 300 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lakeys Cafe and Trailer Park ID3140061 | 300 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Covert Water Users Association ID3140024 | 250 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Rolling Hills Estates Water Company ID3140100 | 250 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Woodview Acres Property Owners ID3140141 | 245 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Sunnyridge 3 Water Corp ID3140121 | 240 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Sunlight Terrace ID3140118 | 234 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Karcher Ranchette Water Corp ID3140049 | 213 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Somerset West Water Corp ID3140113 | 203 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Owyhee Village Subd Water Assn INC ID3140087 | 200 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Timberstone HOA ID3140220 | 170 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Lakeview Hills Water Users Association ID3140062 | 160 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Camelot Water Assn INC ID3140014 | 157 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Clark Theurer Water Assn ID3140140 | 155 | 0 | 0 | 0 | 5 ppbbelow the action level |
| Leisure Heights Homeowners Association ID3140063 | 142 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ok Water Assn ID3140085 | 140 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Par Estates Homeowners Assn ID3140180 | 140 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Rio Vista Water Company 3 ID3140098 | 140 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Shamrock Villa Water Assn ID3140108 | 130 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gem State Academy ID3140038 | 121 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Country Club Subdivisions Water Assn ID3140022 | 120 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Apache Heights Subdivision (2) ID3140005 | 110 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Lakeview Water Company 1 ID3140059 | 100 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Northside Estates HOA INC ID3140229 | 100 | 0 | 0 | 0 | 2 ppbbelow the action level |
| East Lizard Butte Water Corp ID3140042 | 95 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Verde Hills Water Users Assn INC ID3140134 | 95 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Roswell Water Users Coop Company ID3140103 | 90 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Kimpton Acres Third Subd ID3140051 | 88 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Decoy Inn and RV Park ID3140026 | 75 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mangum Heights Subd ID3140068 | 75 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Northridge Estates Water Assn ID3140082 | 75 | 0 | 0 | 0 | 2 ppbbelow the action level |
| D and S Purple Sage Ranchettes ID3140092 | 70 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Stecher Water Users Assn ID3140116 | 70 | 0 | 0 | 0 | 0 ppbbelow the action level |
| West River ID3140265 | 65 | 0 | 0 | 0 | 7 ppbbelow the action level |
| Stecher Mutual Water Company ID3140175 | 62 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Southshore Water ID3140254 | 60 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Burnie Subd ID3140011 | 55 | 0 | 0 | 0 | 0 ppbbelow the action level |
| M and M Mountain View Subd EM2 ID3140067 | 54 | 0 | 0 | 0 | 7 ppbbelow the action level |
| Sunnyridge Property Owners ID3140122 | 53 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Dahl Subd ID3140025 | 51 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Lakeridge Second Subd ID3140056 | 50 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Skyline Water Assn ID3140111 | 50 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Lindenwood Water Assn ID3140010 | 48 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Vanal Heights Sweet Water ID3140132 | 45 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Silver Spur Subdivision ID3140233 | 44 | 0 | 0 | 0 | 2 ppbbelow the action level |
| H and L Park ID3140060 | 43 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Wildrose Estates ID3140139 | 40 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Country Meadows Subd ID3140200 | 35 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sunnyridge Subd 2 ID3140120 | 34 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Aurora Subd ID3140007 | 30 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Twin Bridges Subd ID3140125 | 28 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Horizon Ridge Subdivision ID3140281 | 75 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Canyon 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 Canyon County
10ZIP 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
- Caldwell
- Greenleaf
- Middleton
- Nampa
- Notus
- Parma
- Wilder
View ZIP areas and understand coverage
- 83605Caldwell
- 83607Caldwell
- 83626Greenleaf
- 83644Middleton
- 83651Nampa
- 83656Notus
- 83660Parma
- 83676Wilder
- 83686Nampa
- 83687Nampa
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.