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Counties → Idaho

Twin Falls County, Idaho

SDWIS compliance plate

Sheet ID083 · Twin Falls County 54 sys · 2,851 viol · #691/3254

VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 96.3% flagged
  • HEALTH-MID 24.0% health
  • RANK-UPPER #691/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-MID 54 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Clearwater County ( -0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Twin Falls County ranks #691 of 3,254 counties by people served, and #6 of 44 counties in Idaho. See methodology · corpus placement.

Twin Falls County standing, mid-flagged corpus third

Flagged-system rate 96.3% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 24.0% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #691 of 3,254 · #6 of 44 in Idaho.

Flagged-rate neighbourhood around Twin Falls County

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

0% 20% 40% 60% 80% 100% Valley · lowest Owyhee · near Twin Falls · this county Camas · highest 89.5% 96% 96% 96.2% 96.3% 96.6% 100%

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

Water Systems

System Name Population Violations PFAS
Twin Falls City Of 56,121 164 Clean
Kimberly City Of 5,359 48 -
Buhl City Of 4,518 117 Clean
Filer Water Works 2,858 276 -
Hansen City Of 1,200 13 -
Lds Church Kimberly SC 659 40 -
Amalgamated Sugar Twin Falls 460 45 -
Lds Church Murtaugh 451 6 -
Twin Falls City County Airport 410 55 -
Chobani 390 15 -
Valley View Country School 295 66 -
Castleford City Of 275 47 -
Hollister City Of 220 107 -
Kanaka Rapids Ranch Water System Inc 220 143 -
Shoshone Falls Park Twin Falls 200 7 -
Community Christian Church 150 20 -
Twin Falls Gun Club 150 6 -
Rock Ledge Estates 150 2 -
Meander Point Subd 140 110 -
Murtaugh City Of 130 69 -
Countryside Village 108 91 -
Dierkes 100 8 -
Thousand Springs Resort 100 20 -
Rock Creek General Store 100 93 -
Hilltop Adventist Church 90 65 -
Deep Creek Mennonite School 75 51 -
Rogerson Water Dist 75 70 -
Curry Junction 75 81 -
S&s 75 0 -
Legacy Fields 51 19 -
Balanced Rock Park 50 27 -
Clover Trinity Lutheran School 50 46 -
Rock Creek Park Twin Falls County 50 63 -
Sportsmans River Resort 50 25 -
Oasis Stop N Go 50 29 -
Murtaugh Lake Park 50 17 -
Centennial Waterfront Park 50 16 -
Usda Ars 46 104 -
Miracle Hot Springs 35 12 -
Kws Seeds LLC 30 6 -
Banburys Hot Springs 25 10 -
Blm Salmon Dam Recreation Site 25 9 -
Camp Tawakani 25 93 -
Curry Trailer Park 25 13 -
Kum Ba Yah Church Camp 25 83 -
Nat Soo Pah 25 75 -
Train Station Pizza 25 100 -
Magic Valley Speedway 25 56 -
Good 2 Go Star Stop 25 46 -
Pleasant Valley Golf Course 25 47 -

Compare beyond Idaho

Mid-flagged peers for Twin Falls County

Cross-state counties nearest Twin Falls County on flagged-system share (96.3%) and cumulative violation count (2,851). 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.