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Counties → Idaho

Lemhi County, Idaho

SDWIS compliance plate

Sheet ID059 · Lemhi County 44 sys · 1,447 viol · #2702/3254

VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-MID · BOOK-MOST

  • VIOL-SEVERE 93.2% flagged
  • HEALTH-LOW 14.2% health
  • RANK-BOTTOM #2702/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-NONE No UCMR5 set
  • SRC-GW GW lead 98%
  • SYS-MID 44 systems
  • BOOK-MOST 6/7 fields

Nearest flagged-rate peer: Benewah County (+ 0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Lemhi County ranks #2,702 of 3,254 counties by people served, and #37 of 44 counties in Idaho. See methodology · corpus placement.

Lemhi County standing, mid-flagged corpus third

Flagged-system rate 93.2% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 14.2% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Lemhi County . Population served ranks #2,702 of 3,254 · #37 of 44 in Idaho.

Flagged-rate neighbourhood around Lemhi County

Lowest/highest poles plus in-state counties nearest Lemhi County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Valley · lowest Lemhi · this county Madison · near Camas · highest 89.5% 92.3% 93.2% 93.3% 93.9% 94.1% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Salmon City Of 3,158 129 -
Lemhi (Salmon) Lds Chapel 203 4 -
Elk Bend Unit 1 200 28 -
Williams Lake Subd 200 50 -
Leadore Lds Church 151 2 -
Lemhi County Fairgrounds 150 33 -
Leadore School 140 47 -
Blm Morgan Bar Recreation Site 140 24 -
Baker Country Market 125 0 -
The Village at North Fork 108 19 -
Idpr Twin Peaks Ranch Sp 100 9 -
Assembly of God Church 75 90 -
Usfs Corn Creek Boat Ramp 70 23 -
Sunset Heights Water District 65 85 -
Valley View Heights 65 275 -
Q B Corp 55 6 -
Rameys Broken Arrow 50 28 -
Usfs North Fork Administrative Site 50 64 -
Shepherd of the Valley Church 50 24 -
Waters Edge RV Park & Pizzeria 50 34 -
Salmon River Meadows Mutual Water Compan 47 30 -
Usfs Twin Creek Campground 45 5 -
Idaho Fish and Game 45 75 -
Pahsimeroi Lds Church 41 9 -
Usfs Meadow Lake Campground 38 12 -
Usfs Bighorn Crags Campground 35 0 -
Usfs New Leadore Administrative Site 35 26 -
Usfs Stoddard Trail Head 30 0 -
Blm McFarland Recreation Site 30 17 -
The Ranch 30 30 -
Blm Smokey Cubs Campground 30 18 -
Usfs Spring Creek Campground 26 22 -
Wagonhammer Campground 25 21 -
Ramshorn Estates Subd 25 22 -
Twenty Eight Club 25 16 -
Usfs Corn Creek Campground 25 7 -
Usfs Hughes Creek Forest Service 25 10 -
Usfs Wagonhammer Spring 25 11 -
Rivers Fork Lodge 25 32 -
Lemhi County Industrial Park 25 41 -
Usfs Newland Ranch Human Waste Disposal 25 10 -
Blm Shoup Bridge 25 7 -
Leadore Community Center 25 24 -
Steelhead Bend Unit 2 18 28 -

Compare beyond Idaho

Mid-flagged peers for Lemhi County

Cross-state counties nearest Lemhi County on flagged-system share (93.2%) and cumulative violation count (1,447). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.