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Counties → Idaho

Elmore County, Idaho

SDWIS compliance plate

Sheet ID039 · Elmore County 45 sys · 3,868 viol · #1480/3254

VIOL-SEVERE · HEALTH-LOW · RANK-MID · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 97.8% flagged
  • HEALTH-LOW 15.2% health
  • RANK-MID #1480/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-HIGH 50.0% detect
  • SRC-GW GW lead 93%
  • SYS-MID 45 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Elmore County ranks #1,480 of 3,254 counties by people served, and #12 of 44 counties in Idaho. See methodology · corpus placement.

Elmore County standing, mid-flagged corpus third

Flagged-system rate 97.8% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 15.2% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,480 of 3,254 · #12 of 44 in Idaho.

Flagged-rate neighbourhood around Elmore County

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

0% 20% 40% 60% 80% 100% Valley · lowest Shoshone · near Bannock · near Camas · highest 89.5% 96.8% 97.3% 97.8% 98% 98% 100%

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

Water Systems

System Name Population Violations PFAS
Mountain Home, City Of 14,651 249 Clean
Mountain Home Air Force Base 7,500 574 Detected
Glenns Ferry City Of 1,282 41 -
Trinity Estates Water Users Assn 250 71 -
Mellen Subd Water Dist 250 232 -
Canyon Creek Mobile Home Park 243 75 -
Summerwind Water Users 192 25 -
Meadows Mobile Park 175 166 -
Sawtooth Estates Water Users 175 65 -
Mountain Home Airbase Lds Church 150 39 -
Blue Sage Subdivision 112 239 -
Featherville Townsite Water Corp 100 123 -
Simplot Livestock Company Grandview 100 62 -
Hamilton Place 97 81 -
Atlanta Water Assn 91 201 -
Splendid Acres Water Assn 91 179 -
Trinity View Resort 90 82 -
King Hill Domestic Water and Sewer 87 128 -
Town and Country Water Users Assn 86 93 -
Pleasant Acres Mobile Home Park 85 95 -
New Horizons Water Inc 85 55 -
Mountain Home Migrant Head Start 78 73 -
Tlk Dairy 75 40 -
Oakleaf Subdivision 71 5 -
Mountain Sage 65 140 -
Hammett Haven Apartments 64 148 -
Danskin Properties Association Inc 52 36 -
Camas Estates Water Users 50 52 -
Key Mart Corner 50 62 -
Desert Winds Chevron 50 33 -
Riverview Subd Water Assn 45 48 -
Paradise Homeowners Assn Inc 43 32 -
Silver Sage Real Property Owners Assn 30 69 -
Pine Resort 26 28 -
Shiok 26 19 -
Bakers Acres Association Inc 25 18 -
McGuires Subd 25 18 -
Nitz' Pine Store 25 9 -
Fall Creek Recreational Retreat 25 24 -
Mountain Home Afb Cj Strike Dam Rec Ctr 25 5 -
South Fork Senior Center 25 0 -
Y-Stop General Store 25 62 -
Cj Strike North Park 25 13 -
Pacific Steel and Recycling #50 25 3 -
Ballantyne Camp Subd 1 24 56 -

Compare beyond Idaho

Mid-flagged peers for Elmore County

Cross-state counties nearest Elmore County on flagged-system share (97.8%) and cumulative violation count (3,868). 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.