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Counties → Idaho

Gem County, Idaho

SDWIS compliance plate

Sheet ID045 · Gem County 34 sys · 1,883 viol · #2367/3254

VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL

  • VIOL-SEVERE 94.1% flagged
  • HEALTH-LOW 10.9% health
  • RANK-LOWER #2367/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 34 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Madison County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Gem County ranks #2,367 of 3,254 counties by people served, and #25 of 44 counties in Idaho. See methodology · corpus placement.

Gem County standing, mid-flagged corpus third

Flagged-system rate 94.1% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 10.9% 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 #2,367 of 3,254 · #25 of 44 in Idaho.

Flagged-rate neighbourhood around Gem County

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

0% 20% 40% 60% 80% 100% Valley · lowest Benewah · near Gem · this county Camas · highest 89.5% 93.2% 93.3% 93.9% 94.1% 94.4% 100%

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

Water Systems

System Name Population Violations PFAS
Emmett City Of 6,700 290 Clean
Shadow Butte Elementary School 485 57 -
Emmett Stake Center 474 0 -
Letha Lds Church 369 2 -
Payette River Technical Academy 194 7 -
Calvary Chapel of Emmett 192 33 -
Sweet Lds Church 138 4 -
Gem County Golf Course 100 60 -
Toms Cabin 100 71 -
3 Horse Ranch Vineyards 86 3 -
Little Rascals Learning Center 82 4 -
Bonnie Laura Subd 60 35 -
Rp Emmett LLC 60 3 -
Roystone Hot Springs 60 0 -
Emmett Head Start 55 23 -
Sweet Montour School 50 122 -
Cherry Ridge Rehab 50 58 -
Triangle Restaurant 50 60 -
Wild Willys #2 50 139 -
Elements Kitchen + Bar 50 187 -
Anderson Reserve 50 3 -
Edgemont Subd 40 260 -
Picket Corral Owners Association 35 25 -
Gem County Fairgrounds 31 24 -
R and V Mobile Home Park 27 31 -
Ola Station LLC 25 103 -
Wink Salon and Barber 25 53 -
Usbr Black Canyon Dam Montour Campground 25 24 -
7 Rivers Livestock Commission 25 54 -
Montour Country Store 25 83 -
Usbr Black Canyon Dam Black Canyon Park 25 28 -
Usbr Black Canyon Dam Cobblestone Park 25 4 -
Usbr Black Canyon Dam Wildrose Park 25 16 -
B and W Fuels Inc 25 17 -

Compare beyond Idaho

Mid-flagged peers for Gem County

Cross-state counties nearest Gem County on flagged-system share (94.1%) and cumulative violation count (1,883). 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.