Tapcensus

Idaho

Custer County drinking water quality

59 active public water systems serve 5,881 people in Custer County. 28 are compliant, 31 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 3 carry a health flag.

Active systems 59 4 community systems
People served 5,881 by public water systems
Systems with violations 31 53% of active systems, past 3 years
Serious violators 1 3 systems carry a health flag

Needs attention

North Gate Inn ID7190035 · Transient non-community system · Serves 100 4 rules violated in the past three years. Unresolved: Ground Water Rule and Public Notice Rule and Revised PN Rule.
Blm Joe T Fallini ID7190005 · Transient non-community system · Serves 540 2 rules violated in the past three years. Unresolved: Revised Total Coliform Rule.
Blm Cottonwood Recreation Site ID7190174 · Transient non-community system · Serves 50 2 rules violated in the past three years. Unresolved: Revised Total Coliform Rule.
Moose Crossing RV Park ID7190188 · Mackay · Transient non-community system · Serves 20 3 rules violated in the past three years. Unresolved: Revised Total Coliform Rule.

Community water systems

4 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Challis City of
 900 5 1
Mackay City of
 566 0 0
Round Valley Water Assn
 125 1 0
Antelope Creek Living Center
 27 0 0
Non-community systems (55: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Blm Joe T Fallini
 540 2 1
Usfs Fishook Well
 460 0 0
Usfs Glacier View Campground
 314 0 0
Mountain Village Lodge and Restaurant
Stanley 		225 2 1
Sawtooth Luces
 200 1 0
Thompson Creek Mine
 190 0 0
Stanley Kasino Club
Stanley 		150 3 1
Lds Church Leslie
 147 0 0
Usfs Sunny Gulch Campground
 122 0 0
7 C Junction
 100 1 0
North Gate Inn
 100 4 2
Lds Church Challis
 97 0 0
Stanley High Country Inn
Stanley 		75 4 1
Blm Bay Horse Recreation Site
 70 1 0
Idaho Rocky Mountain Ranch
 65 0 0
Idfg Sawtooth Fish Hatchery
 63 0 0
Usfs Stanley Lake Campground
 56 0 0
Usfs Chinook Bay
 54 0 0
Blm Cottonwood Recreation Site
 50 2 1
Blm East Fork Recreation Site
 50 1 0
Idpr Challis Hot Springs Campground
 50 1 0
Idpr Yankee Fork Historic Area
 50 2 1
Stanley River Retreat and Cabins
 50 1 0
Usfs Redfish Waste Disposal
 50 0 0
Usfs Stanley Office
 49 1 0
Old Sawmill Station
Stanley 		45 1 0
Usfs Salmon River Campground
 44 0 0
Living Waters Ranch
 40 2 1
Stanley Community Library
Stanley 		40 1 0
Usfs Bonanza Guard Station and Ycc Camp
 40 0 0
Usfs Yankee Fork New Ranger Station
 40 0 0
White Knob Motel and Pool
 38 2 1
White Knob RV Park
 38 1 1
Bsa Bradley Scout Reservation
 33 1 1
Usfs Mormon Bend Campground
 31 1 0
Stanley RV & Camp
 26 0 0
Usfs Wildhorse Campground
 26 0 0
Lower Stanley Country Store
 25 1 0
Mountain Village Service
Custer, Stanley 		25 0 0
Papa Brunees
Stanley 		25 1 1
Rod and Gun Club
 25 3 1
Salmon River Emergency Clinic
Stanley 		25 1 0
Stanley Baking Company
Stanley 		25 2 1
Stanley Community Center
 25 0 0
Stanley School
 25 0 0
Stanley Town Square
Stanley 		25 1 0
Torreys Burnt Creek Inn
 25 0 0
Usfs Beaver CK Campground
 25 0 0
Usfs Casino Creek CG
 25 0 0
Usfs Lola Creek Campground East
 25 1 0
Usfs Park Creek Campground
 25 0 0
Usfs Phi Kappa Campground
 25 0 0
Usfs Starhope Campground
 25 0 0
Valley Creek Lodge
 25 0 0
Moose Crossing RV Park
Mackay 		20 3 1
Inactive systems (138, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Idaho records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.