Tap and WellTreasure Valley water, from the public record

Copper in Treasure Valley drinking water

147 of 160 systems that tested for it in the last 36 months detected it; 6 are above the limit, elevated, or an aesthetic issue. Copper is an inorganic contaminant. Certified filters are in the list.

Results reflect sampled homes. Slightly acidic or soft water is more corrosive to copper pipe.

Results are from sampled homes in the system, not from your tap.

SystemCounty36 mo maxLatestStatusLast sample
Hammett Haven ApartmentsElmore9.30ppm9.30ppmAbove limit2026-09-14
Idaho Youth Ranch Hands of PromiseCanyon1.90ppm0.81ppmElevated2025-12-31
Mores Creek Rim Ranch Water DistrictBoise1.60ppm0.20ppmDetected2025-06-30
Purple Sage CommunityCanyon1.25ppm0.06ppmDetected2026-09-14
R and V Mobile Home ParkGem0.86ppm0.86ppmElevated2025-12-31
Mountain View Water and Road AssociationBoise0.80ppm0.28ppmDetected2026-06-30
Terrace Lakes Water CompanyBoise0.78ppm0.78ppmElevated2025-12-31
Amy Trailer ParkAda0.73ppm0.73ppmElevated2025-12-31
Wilderness Ranch Owners Association Inc.Boise0.73ppm0.73ppmElevated2026-09-14
Willowbrook Estates Property OwnersAda0.62ppm0.62ppmDetected2025-12-31
Veolia Water IdahoAda0.53ppm0.48ppmDetected2026-06-30
Idaho City Water DepartmentBoise0.46ppm0.30ppmDetected2025-06-30
Rivers Point Property Owners AssociationBoise0.44ppm0.44ppmDetected2024-12-31
Trinity Estates Water Users AssociationElmore0.43ppm0.43ppmDetected2025-12-31
Apache Heights Subdivision (2)Canyon0.38ppm0.38ppmDetected2025-12-31
City of Eagle (Eastern Zone)Ada0.36ppm0.36ppmDetected2026-09-14
Sierra Water Corp.Ada0.35ppm0.35ppmDetected2024-12-31
Eagle Glen Homeowners Association Inc.Ada0.32ppm0.32ppmDetected2024-12-31
Duquette Pines Homeowners AssociationBoise0.32ppm0.32ppmDetected2024-12-31
Mountain Shadows HOA Inc.Boise0.32ppm0.20ppmDetected2025-12-31
Paradise Estates Water Corp.Ada0.31ppm0.31ppmDetected2024-12-31
Wymosa Water Association Inc.Ada0.29ppm0.29ppmDetected2024-12-31
Hillsdale Estates Homeowners AssociationAda0.27ppm0.27ppmDetected2023-12-31
Twin Bridges SubdivisionCanyon0.26ppm0.26ppmDetected2025-12-31
Kimpton Acres Third SubdivisionCanyon0.25ppm0.25ppmDetected2026-09-14
Clark Theurer Water AssociationCanyon0.24ppm0.24ppmDetected2025-12-31
Gem State AcademyCanyon0.21ppm0.08ppmDetected2026-09-14
Northridge Estates Water AssociationCanyon0.21ppm0.21ppmDetected2025-12-31
Country Club Subdivisions Water AssociationCanyon0.20ppm0.20ppmDetected2026-09-14
Shamrock Villa Water AssociationCanyon0.20ppm0.20ppmDetected2024-12-31
Flying H Trailer RanchAda0.19ppm0.19ppmDetected2024-12-31
Horseshu Vue Ranch SubdivisionBoise0.18ppm0.18ppmDetected2025-12-31
Karcher Ranchette Water Corp.Canyon0.16ppm0.16ppmDetected2025-12-31
Locust SubdivisionCanyon0.16ppm0.16ppmDetected2025-12-31
Dry Creek Water Company LLCAda0.15ppm0.11ppmDetected2024-12-31
Greenhills Estates 3Ada0.15ppm0.15ppmDetected2025-12-31
Anderson Circle Water Corp.Ada0.15ppm0.15ppmDetected2025-12-31
Rim Acres Mutual WaterAda0.15ppm0.15ppmDetected2024-12-31
City of EmmettGem0.14ppm0.14ppmDetected2026-09-14
Karcher Acres SubdivisionCanyon0.14ppm0.14ppmDetected2025-12-31
Meridian Water DepartmentAda0.14ppm0.12ppmDetected2026-06-30
City of MiddletonCanyon0.14ppm0.13ppmDetected2026-09-14
Sunnyridge I SubdivisionCanyon0.13ppm0.13ppmDetected2024-12-31
City of GreenleafCanyon0.13ppm0.13ppmDetected2025-12-31
Dahl SubdivisionCanyon0.13ppm0.13ppmDetected2026-09-14
Shilo Ranch EstatesBoise0.13ppm0.13ppmDetected2025-12-31
Roswell Water Users Coop CompanyCanyon0.13ppm0.13ppmDetected2025-12-31
Leisure Heights Homeowners AssociationCanyon0.13ppm0.13ppmDetected2025-12-31
West RiverCanyon0.13ppm0.13ppmDetected2024-12-31
Lindenwood Water AssociationCanyon0.13ppm0.13ppmDetected2025-12-31
Rich SubdivisionCanyon0.12ppm0.12ppmDetected2025-12-31
Skyline Water AssociationCanyon0.12ppm0.12ppmDetected2025-12-31
City of NampaCanyon0.12ppm0.12ppmDetected2026-09-14
Valley Hi EstatesBoise0.12ppm0.12ppmDetected2024-12-31
Lansing MeadowsCanyon0.12ppm0.12ppmDetected2024-12-31
Covert Water Users AssociationCanyon0.11ppm0.11ppmDetected2024-12-31
Lakeview Hills Water Users AssociationCanyon0.11ppm0.11ppmDetected2025-12-31
City of Eagle - ValnovaAda0.11ppm0.11ppmDetected2026-06-30
Wildrose EstatesCanyon0.11ppm0.11ppmDetected2026-09-14
Shipman Place SubdivisionCanyon0.11ppm0.11ppmDetected2025-12-31
Picket Corral Owners AssociationGem0.11ppm0.06ppmDetected2023-12-31
Riley Trailer ParkAda0.11ppm0.11ppmDetected2025-12-31
Belle Aire Acres 2Canyon0.10ppm0.10ppmDetected2025-12-31
Northside Estates HOA Inc.Canyon0.10ppm0.10ppmDetected2024-12-31
Island Village Mobile Home ParkAda0.10ppm0.10ppmDetected2024-12-31
Drake SubdivisionCanyon0.10ppm0.10ppmDetected2026-09-14
City of MelbaCanyon0.10ppm0.10ppmDetected2025-12-31
Sunnyridge 3 Water Corp.Canyon0.10ppm0.10ppmDetected2025-12-31
Terrace Water Corp. Inc.Ada0.09ppm0.09ppmDetected2025-12-31
Eagle MHCAda0.09ppm0.09ppmDetected2025-12-31
Silver Spur SubdivisionCanyon0.09ppm0.09ppmDetected2024-12-31
Camelot Water Association Inc.Canyon0.09ppm0.09ppmDetected2025-12-31
Scottys Mobile Home ParkAda0.09ppm0.09ppmDetected2025-12-31
Maverick Subdivision Lasher ConstructionCanyon0.09ppm0.09ppmDetected2025-12-31
Westview Shervik SubdivisionCanyon0.09ppm0.09ppmDetected2025-12-31
Horseshoe Bend Water SupplyBoise0.09ppm0.09ppmDetected2025-12-31
Ok Water AssociationCanyon0.09ppm0.09ppmDetected2025-12-31
City of CaldwellCanyon0.09ppm0.09ppmDetected2026-09-14
El Rancho HeightsCanyon0.09ppm0.09ppmDetected2025-12-31
Castle Mountain Creeks Owners AssociationBoise0.08ppm0.03ppmDetected2025-12-31
Garden Valley Ranchettes HomeownersBoise0.08ppm0.08ppmDetected2023-06-30
Simplot Livestock Company GrandviewElmore0.08ppm0.08ppmDetected2026-09-14
Sawtooth Estates Water UsersElmore0.08ppmNDDetected2026-08-26
West Meadows EstatesAda0.08ppm0.08ppmDetected2025-12-31
Klugherz Water Corp.Ada0.08ppm0.08ppmDetected2025-12-31
Grouse Point Water Company LLCAda0.08ppm0.08ppmDetected2024-12-31
City of Eagle (Western Zone)Ada0.08ppm0.08ppmDetected2024-12-31
Dell Subdivision Water AssociationAda0.07ppm0.07ppmDetected2025-12-31
Woodview Acres Property OwnersCanyon0.07ppm0.07ppmDetected2025-12-31
Cherry Ridge RehabGem0.07ppm0.07ppmDetected2024-12-31
Krizview ParkAda0.07ppm0.07ppmDetected2025-12-31
Star Sewer and Water District Water SystemAda0.07ppm0.03ppmDetected2025-12-31
Mountain Home Air Force BaseElmore0.07ppm0.02ppmDetected2026-09-14
Northstar SubdivisionCanyon0.07ppm0.07ppmDetected2025-12-31
Eagle Point CommunityAda0.07ppm0.07ppmDetected2025-12-31
Stecher Mutual Water CompanyCanyon0.07ppm0.07ppmDetected2025-12-31
Lakeridge Second SubdivisionCanyon0.07ppm0.07ppmDetected2025-12-31
Canyon Creek Mobile Home ParkElmore0.07ppm0.07ppmDetected2025-12-31
City of KunaAda0.06ppm0.06ppmDetected2026-06-30
Caldwell Housing AuthorityCanyon0.06ppm0.01ppmDetected2026-06-30
Indian VillageCanyon0.06ppm0.06ppmDetected2024-12-31
Stecher Water Users AssociationCanyon0.06ppm0.06ppmDetected2025-12-31
City of Eagle - AvimorAda0.06ppm0.06ppmDetected2026-06-30
Rio Vista Water Company 3Canyon0.05ppm0.05ppmDetected2025-12-31
Country Meadows SubdivisionCanyon0.05ppm0.05ppmDetected2026-09-14
Vanal Heights Well AssociationCanyon0.05ppmNDDetected2023-09-25
City of WilderCanyon0.05ppm0.05ppmDetected2025-12-31
Rustic Acres Mobile Home ParkAda0.05ppm0.05ppmDetected2025-12-31
King Hill Domestic Water and SewerElmore0.04ppm0.04ppmDetected2024-12-31
Sky Ranch EstatesCanyon0.04ppm0.04ppmDetected2026-09-14
IDOC Mountain View Transformation CenterAda0.04ppm0.03ppmDetected2023-06-30
City of NotusCanyon0.04ppm0.04ppmDetected2025-12-31
M & T Water Corp.Canyon0.04ppm0.04ppmDetected2025-12-31
Chaparral Water AssociationAda0.04ppm0.04ppmDetected2026-09-14
Timberstone HOACanyon0.03ppm0.03ppmDetected2024-12-31
Verde Hills Water Users Association Inc.Canyon0.03ppm0.03ppmDetected2025-12-31
Sunlight TerraceCanyon0.03ppm0.03ppmDetected2025-12-31
Aurora SubdivisionCanyon0.03ppm0.03ppmDetected2026-09-14
Eagle Meadows MHPAda0.03ppm0.03ppmDetected2024-12-31
Ranch SubdivisionBoise0.03ppm0.03ppmDetected2024-12-31
OspreyBoise0.03ppm0.03ppmDetected2024-12-31
Boise Holcomb Water Users Assoc. Inc.Boise0.03ppm0.01ppmDetected2025-12-31
New Horizons Water Inc.Elmore0.03ppm0.03ppmDetected2024-12-31
Atlanta Water AssociationElmore0.02ppm0.02ppmDetected2024-12-31
Sunnyridge Subdivision 2Canyon0.02ppm0.02ppmDetected2025-12-31
Horizon Ridge SubdivisionCanyon0.02ppm0.02ppmDetected2026-09-14
Forrey HeightsAda0.02ppm0.02ppmDetected2025-12-31
City of Mountain HomeElmore0.02ppm0.02ppmDetected2025-12-31
Burnie SubdivisionCanyon0.02ppm0.02ppmDetected2025-12-31
Danskin Properties Association Inc.Elmore0.02ppm0.02ppmDetected2025-12-31
Arrowrock RanchAda0.02ppm0.02ppmDetected2024-12-31
Willowtree Estates Homeowner AssociationAda0.02ppm0.02ppmDetected2024-12-31
Desert View Estates Water Corp.Ada0.01ppm0.01ppmDetected2024-12-31
Shalimar SubdivisionCanyon0.01ppm0.01ppmDetected2025-12-31
Summerwind Water UsersElmore0.01ppm0.01ppmDetected2026-09-14
Pleasant Acres Mobile Home ParkElmore0.01ppm0.01ppmDetected2025-12-31
Camas Estates Water UsersElmore0.01ppm0.01ppmDetected2024-12-31
City of Glenns FerryElmore0.01ppm0.01ppmDetected2026-09-14
Mellen Subdivision Water DistrictElmore0.01ppm0.01ppmDetected2024-12-31
Pleasant View ManorCanyon0.01ppm0.01ppmDetected2025-12-31
Hamilton PlaceElmore0.01ppm0.01ppmDetected2025-12-31
Decoy Inn and RV ParkCanyon0.01ppm0.01ppmDetected2024-12-31
Owyhee Village Subdivision Water Association Inc.Canyon0.01ppm0.01ppmDetected2025-12-31
Sunnyridge Property OwnersCanyon0.01ppm0.01ppmDetected2025-12-31
Oakleaf SubdivisionElmore0.01ppm0.01ppmDetected2026-09-14
East Lizard Butte Water Corp.Canyon0.00ppm0.00ppmDetected2025-12-31
Mountain SageElmore0.00ppm0.00ppmDetected2025-12-31

Limits

Action level
1.3 mg/L (1.30ppm)
Health goal (MCLG)
1.30ppm
Copper is an essential nutrient, but some people who drink water containing copper in excess of the action level over a relatively short amount of time could experience gastrointestinal distress. Long-term exposure could cause liver or kidney damage.EPA, quoted. For infants and pregnancy, read the agency text as written.

Removal methods in the reference list: reverse osmosis, NSF/ANSI 53 carbon block. A method name is not a product certification.

By city: Copper in Boise City drinking water, Copper in Robie Creek drinking water, Copper in Wilder drinking water, Copper in Garden City drinking water, Copper in Meridian drinking water, Copper in Idaho City drinking water, Copper in Eagle drinking water, Copper in Emmett drinking water, Copper in Middleton drinking water, Copper in Greenleaf drinking water, Copper in Nampa drinking water, Copper in Horseshoe Bend drinking water, Copper in Caldwell drinking water, Copper in Garden Valley drinking water, Copper in Star drinking water, Copper in Mountain Home drinking water, Copper in Mountain Home AFB drinking water, Copper in Kuna drinking water, Copper in Notus drinking water, Copper in Glenns Ferry drinking water.

407 groundwater zones in the region have confident (grade A or B) estimates for Copper. See well estimates by ZIP.

Numbers are the system's samples at its taps and wells, not yours. Lead and copper are 90th percentiles from sampled homes. Well pages are nearby-sample estimates. Health text restates EPA and DEQ. Methodology.